Four Measures to Prolong the Service Life of Dust Catcher

The dust catcher is an important part of the drying machine which has the disadvantages of large volume of exhaust air, high concentrations of dust, high moisture content, high discharging point and wide range of pollution, bringing the difficulty for the dust removal technology. The exhaust gas of the dryer is related with the process conditions of individual enterprise such as the large production change, frequent downtime and large fluctuation range. Furthermore, if the coal is used as the drying heat sources, the sulfur oxides in the emission have corrosive effect on metal structure, which brings some difficulties for the selection of the dust catcher . The following are four measures to prolong the service life of the dust catcher of the dryers.
1. The material of the dust removal equipment should choose the alloy whose aluminum content is not less than 95%, which can greatly reduce corrosion.
2. The heat insulation of the dust removal system should be guaranteed. The entry of the cold air blast is one of the important reasons that cause the corrosion of dust removal equipment. As long as the heat insulation work is carried out well, the corrosion would be greatly reduced.
3. It can adopt the secondary dust removal program. The so-called secondary dust removal is to use the cyclone dust catcher with high wear resistance for primary dust removing and then to use the second dust remover for the final dust removing.
4. The operation of the drying equipment and dust collector should be standardized. The standardized operating procedure of the machinery is the necessary step, which can minimize corrosion.

Original link: http://www.hxjqcrusher.com/261.htm

Four Measures to Prolong the Service Life of Dust Catcher

The dust catcher is an important part of the drying machine which has the disadvantages of large volume of exhaust air, high concentrations of dust, high moisture content, high discharging point and wide range of pollution, bringing the difficulty for the dust removal technology. The exhaust gas of the dryer is related with the process conditions of individual enterprise such as the large production change, frequent downtime and large fluctuation range. Furthermore, if the coal is used as the drying heat sources, the sulfur oxides in the emission have corrosive effect on metal structure, which brings some difficulties for the selection of the dust catcher . The following are four measures to prolong the service life of the dust catcher of the dryers.
1. The material of the dust removal equipment should choose the alloy whose aluminum content is not less than 95%, which can greatly reduce corrosion.
2. The heat insulation of the dust removal system should be guaranteed. The entry of the cold air blast is one of the important reasons that cause the corrosion of dust removal equipment. As long as the heat insulation work is carried out well, the corrosion would be greatly reduced.
3. It can adopt the secondary dust removal program. The so-called secondary dust removal is to use the cyclone dust catcher with high wear resistance for primary dust removing and then to use the second dust remover for the final dust removing.
4. The operation of the drying equipment and dust collector should be standardized. The standardized operating procedure of the machinery is the necessary step, which can minimize corrosion.

Original link: http://www.hxjqcrusher.com/261.htm

High Pressure Mill Promotes New Development of Milling Equipment

In recent years, Hongxing Mining Machinery has made great improvement internally and externally. On one hand, it has to face the fierce competition from the domestic market; on the other hand, it also makes efforts to meet the challenge of the technical competition of the international enterprises. It has won a place for itself in the international market. The high pressure grinder mill fully reflects the technical capabilities of our company, having achieved technological breakthrough. It is favored by the customers at home and abroad.

 
Hongxing Mining Machinery Co., Ltd. regards the development of world-class high-pressure ultrafine mill as the target. On the basis of many years of the research on the future trends of the domestic and international milling equipment , it has developed the milling machine with advanced technology. It provides the customers with the high quality product and best service system at the lowest price, which makes the product be the preferred choice in the powder making industry.
The high pressure ultrafine grinding mill develops towards the direction of large scale, intelligentization and green, which fully complies with the technology development and the market demand for the high pressure ultrafine mill and high-pressure ultra-fine mill market.
We always believe that a qualified mill manufacturer should not only provide customers with the milling equipment with wide selectivity, reasonable supporting, reliable quality and high cost performance, but also should provide the better full set of service such as the design process according to the actual situation of the customers and the installation, commissioning and maintenance service. Our company can fully meet your requirements.

Original link: http://www.hxjqcrusher.com/260.htm

The Reasons for the Low Flour Yield of Grinding Mill

The grinder mill market is continuously expanding and has wide range of its customers base. It always occupies an important position in the field of coal preparation and slag processing fields. The grinding mill is mainly used for the processing and production of the calcite powder, lime powder, sierozem, long powder, gypsum powder, talcum powder and other raw materials. Our company has the comprehensive study and understanding of the grinder mill based on the production and sales experience of mill equipment for many years and has accumulated research and experience in handling a large number of problems mill equipment and summed up a lot of ways accordingly. The following is the reason for the low flour yield of the grinding mill.

1, the material. The grinding miller adopts the dry milling, if the moisture content of materials is excessive or the materials contain other impurities, it will cause the internal bond, which not only has a greater impact on the production of the mill, but also cause the damage of the accessories of the mill if the time is too long. If it can not be ruled out in a timely manner, the consequences could be very serious.
2, feeding particle size. Generally, the customers have high requirements for the discharging particle size of the mill, because that the fineness of the finished product directly affects their economic benefits. However, in fact, the feeding particle size is also very important. If the feeding particle size is too large or too small, it will cause a great impact on the production and running of the grinding miller. If the feeding particle size is too large, the material is easy to cause the blockage on the feeding end, which is not easy to achieve the grinding crushing between the rollers and the grinding ring; if the feeding particle size is too small, it is not easy to form the material cushion in the grinding chamber and the direct collision of the roller and grinding ring will not only generate a lot of noise, but also make the mill generate large vibration, which is very unfavorable to the operation of the machine.

Original link: http://www.mine-crusher.com/news_158.htm

To Provide High Quality Sand Aggregate for Market

With the increase of the national infrastructure and the continuous development of the national economy, the demand for aggregates market is also increasing. A variety of sand making machinery has attracted the attention. Henan Hongxing Minging Machinery has launched a variety of wear-resistant crushing machines such as the pebble sand making machine , granite crusher equipment through continuous innovation and improved technology, effectively promoting the economic construction. The river pebbles with high value is the promising raw material in the construction market. In order to meet customers’ needs, our company has developed pebble sans making machine.

 
The pebble crushing equipment is the commonly used device in mining and metallurgy industry. The equipment has large processing capacity. The crushing theory it adopts reduces the wear and tear of the main components of the device, reduces the final particle size of the crushed material and increases the content of the fine-grained, thereby improving the processing capability, reducing power consumption, reducing costs and increasing the economic benefits. In addition, how to prolong the service life of quick-wear parts is also important. When the non-broken materials enter the crushing chamber, it is necessary to take some measures to prevent the lining plate from being damaged.
Currently, our company not only has significant advantage in the domestic market , but also occupy a certain share in the international market. Meanwhile, the technology sector also makes efforts to conduct constant technology innovation of crushing equipment to expand the market.

Original link: http://www.hxjqcrusher.com/259.htm

Disk Grain Making Machine/Disk Granulator

Performance features
The disk granulator produced by our company adopts the overall arc structure of the disk angle and granulation rate can be up to 93%. Granulating disc has three discharge ports, which makes it easy to conduct the intermittent production operations, greatly reducing the labor intensity and improving the labor efficiency. The flexible transmission of the reducer and motor helps the smooth start, the mitigation of the impact and the increase of the equipment service life. At the bottom of the granulation disk, it is strengthened by multiple radiation steel plates to make it durable without deformation. There is no need of anchor bolts to fix it due to the thicker, heavier, sturdy base design. The main gear adopts the high-frequency quenching, prolonging its service life. In the granulation disk, it is lined with the fiber reinforced plastics, which is anti-corrosion and durable. The surface is featured with the advantages of uniform granulation, high granulation rate, smooth operation and long service life and other advantages.

Working principle
The raw material powder is wetted evenly by the atomized water evenly in the biaxial mixer, forming the ball nuclear with uniform particle size, which will be sent into the disk for the next procedure. The moisture of the materials should be controlled at 12 ~ 14%. The water is mostly added in the biaxial mixer and only a small amount of water should be added in the disk. As for the dry powder granulation, an appropriate amount of water should be sprayed into the granulation disk. The raw material ball nuclear will do the parabolic motion under the role of centrifugal force, friction and gravity after entering the granulation disk. Due to the adhesion and plasticity of the material, the ball nuclear bonds with each other and gradually becomes large in the course of motion. In the continuous rolling process, the water in the raw material ball nuclear will be constantly discharged out of the surface. Due to the adhesion of the material and the natural evaporation of the liquid film on the surface, the pellet has certain strength so that they will be discharged out from the disk grain making machine with the rotation of the inclined disk.

Full Set of Solution to Cobble Sand Making

In order to solve the common problems that the customers encounter in the cobble sand making, Hongxing Mining Machinery has launched a complete solution to pebbles sand making, which not only includes the detailed introduction of the materials features, device configuration and application range, but also provide the customers with considerate service with a combination of graphic, case and equipment. The solution program has the following three characteristics.

To configure the device according to material properties
Because the pebbles, limestone, coal gangue have various material hardness, the sand making machinery to be used will be also different. For example, the cone breaker or impact pulverizer is the commonly used equipment in cobble sand making, while the single-stage fine crusher is usually used for the crushing of the coal gangue. Therefore, our company provides the production line configuration for the small and medium-sized pebbles sand making, which regards the jaw crushing plant and cone breaker as the main crushing equipment to meet users’ needs better.
Different application fields of different materials
The materials have different application fields after being crushed. Many customers who just enter the sand industry do not have a better understanding of the material properties and the application of the sand. Thus, our company provides a variety of configuration project based on the analysis of the market demand by summarizing the material distribution and material properties of the various regions, bringing benefits for the customers.
Case analysis
In addition, depending on the different material properties, our company takes a number of different sand production lines built in various regions as the example to introduce the usage, benefits and equipment configuration of the pebble sand making through the real case analysis.

Original link: http://www.hxjqcrusher.com/258.htm

Spiral Concentrator/ Spiral Chute Separator

Superiority and application range
The spiral concentrator is the optimum equipment for mining and mineral processing. Especially for the placer mining in the seaside, river, sand beach and brook, the spiral chute is more desirable. The spiral chute separator has the advantages of light weight, moisture-proof, antirust, corrosion-resistant, strong adaptability to the feeding and the fluctuations in concentration, particle size and grade, no noise and so on.
This equipment applies to the sorting of fine minerals whose particle size is from 0.3 - 0.02 mm such as iron ore, ilmenite, chromite, pyrite, zircon, rutile, monazite, tungsten ore, tin, niobium ore as well as other non-ferrous metals with differences in the proportion, rare metals and non-metallic minerals. In addition, the spiral chute is easy to operate with stable sorting process, the allowed changing range of feeding concentration is wide, the water consumption is low and other advantages.
Advantages
1.The gravity spiral chute has reasonable structure, simple installation and small floor space.
2.Easy operation, stable ore beneficiation , clear processing and large throughput.
3.High efficiency, high beneficiation enrichment, high recovery rate and reliable operation.
Structural features
The spiral chute separator is assembled by the screw blade which is made of glass fiber reinforced plastic. The inner surface of the blade is equipped with resistant lining that is made of urethanes or the epoxy resin mixed emery. Spiral chute is supported on a metal structure shelve. Above it, there are mineral separation machine and receiving shaft, while the products interception machine and the receiving shaft are on the lower part. According to the different needs of the processing amount, the spiral chute unit can be made into different layers, namely the single head structure, double head structure and so on to meet the various requirements of the users. 　

Cone Breaker/Ore Crusher

The cone breaker is suitable for the crushing of various minerals and rocks whose compression strength are not more than 250Mpa as well as the materials with medium hardness. In addition, it is also applicable to the crushing of raw materials in the industries of metallurgy, construction, road building, chemical and silicate, especially for the secondary crushing and fine crushing of the ores and rocks in the small and medium-sized dressing plants. The series of cone crusher has high production capacity, long service life of the tooth plate, low energy consumption and uniform granularity of the products. It possess a higher production capacity, best product shape and greatest reliability and flexibility and it is easy to automatic control, creating more value for the users.

Layout design
The cavity shape of the cone breaker is a kind of working space formed by the crushing wall (dynamic cone) and rolling wall (fixed cone). The design of the cavity has a significant impact on the economic and technical indicators of the cone crusher (productivity, energy consumption, the grain size of the products broken, grain shape and the wear of the crushing wall and rolling wall). This unique design makes the granularity of the final products even and appear cube shape and the wear of the dynamic cone work surface more uniform.
The operating parameters of the ore crusher has a direct impact on the motion characteristics of granular materials in the crushing cavity,which can be mainly manifested by the impact on the motion state of the granular material left by the swing speed of the spindle. And then the work performance of the crusher (productivity and granularity distribution of the broken product etc.) will be affected.
Advantages
1, large crushing ratio, high production efficiency, simple maintenance, easy to use;
2, less consumption of the wearing parts, low running costs;
3, excellent granularity of the finished products, high degree of automation, short downtime;
4, rare lubrication, reliable and advanced, long service life;
5, a variety of crushing cavity, flexible application, strong adaptability.

The Influence Caused by the Overdosage of Flotation Reagents

In the flotation process, the hazards of overdosage of the flotation reagents is often easily overlooked. It is proved that the decrease of the flotation index is mainly caused by the excessive dosage of the flotation reagents. The hazards of the overdosage mainly includes the following aspects.
The harmfulness of excessive collector: A. It will destroy the selectivity of the flotation process. Tests and production practices have proved that when the collector dosage exceeds a certain range, the concentrate grade will be significantly decreased. B. The excessive collector will bring difficulties for the further selection of foam concentrate and the separation of the mixed concentrate. C. The excessive collector allows the decline of floatability of certain minerals. D. The excessive collector also results in the formation of large amount of foams, which will make it difficult for the dehydration of concentrates and tailings and bring difficulty for the concentrate and filter.
The hazards of excessive inhibitors. When the inhibitor is excessive, the mineral to be floating and the mineral to be suppressed may also be suppressed at the same time, resulting in lower recovery. In this case, in order to increase the floating ability of the floating mineral, it must increase the dosage of the collector.

the hazards of excessive activator. It will not only destroy the selectivity of the flotation process, but also result in the action with collectors to form the sediment, consuming large amounts of collectors. For example, when the operators conduct the activation of sphalerite, if the copper sulfate is excessive, the copper ions in the slurry and the xanthate will generate the xanthan copper sediment, causing the unnecessary increase in consumption.
The hazards of the excessive foaming agents. It will generate a lot of sticky, fine bubbles, which will make the gangue minerals adhere to the bubbles, affecting the concentrate grade.
The strict control of the flotation reagent dosage is an important factor to improve the flotation indicators of flotation separator . The excessive dosage will destroy the selectivity of the flotation process and increase the processing costs and directly or indirectly, bring the difficulties for the adjustment of the flotation process.

Two Ways to Control the Air Quantity of Draught Fan

(1) the working principle of adjusting the air quantity of the draught fan of industrial drying machine: when the draught fan is working in the ventilation network, the actual air volume is equal to the flow of air in the ventilation network and the pressure is equal to the resistance of the ventilation network. The fan performance curve depicts the variation of the air flow and pressure of the fan. The ventilation network characteristic refers to the relationship between the air flow and the resistance of the ventilation network.

When the drying equipment is used to dry the materials, the working conditions of the draught fan need to be adjusted according to production requirements, namely, to change the location of the operating point of the fan to make the output of the air volume keep balance with the actual needs of the air volume. The following is the two ways to control the air quantity.
the throttle regulation: it means that the throttle valve should be installed in the exhaust pipe of the fan in the industrial dryer. According to actual needs, changing the opening degree of the throttle valve will change the characteristics of the pipe to regulate air flow.
(2) the adjustment of the rotational speed: as for the fan itself, it is more economical without additional energy loss when changing the rotational speed of the draught fan. However, it is necessary to use the motor to adjust the speed when changing the fan speed, which will need to add speed control device. In addition, the greater the power of the motor is, the higher the cost will be.

Milling Equipment

Main structure
The milling equipment is mainly composed of the host, analyzer, blower, cyclone separator and other parts. Milling equipment is mainly applied in the sectors of building materials, chemicals, fertilizer, metallurgy, mining, refractory, ceramic, steel, thermal power, coal and other industries for the grinding of the materials whose Mohs hardness is below 9 and humidity is less than 6%. The fineness of the finished product can be adjusted from 30 mesh to 400 mesh.

Working principle
When the grinding mill is in operation, the materials to be pulverized will be sent to the machine from the side of the casing and the materials will revolve around the vertical axis by relying on the roller device hanging on the rack. Due to the centrifugal force generated by the rotation, the grinding rollers swing out to press against the grinding ring so that the materials are sent to the gap between the grinding roller and grinding ring, achieving the purpose of grinding.
Points need attention
When the milling equipment is in operation, it is important to ensure the safety of production. If there were unusual noise or sudden increase of the load of any parts, the operators should immediately stop the machine for inspection and troubleshooting in order to avoid the major accident. If there is the need to start the machine again, the oddments in the milling machine should be removed. Otherwise, the power current is too large, affecting the startup of the machine.

Rotary Screen/ Rotary Separator/ Rotary Sieve

The rotary screen is used for the screening of fine materials and the powdery materials, having high screening capacity. It is widely used in metallurgy, chemical industry, abrasives, glass, ceramics, construction, light industry, food and other industries.

Superiority
The rotary separator is featured with the superiority of high efficiency, high utilization rate of screen, less clogging, simple structure, small size, light weight, fully enclosed structure, no dust pollution and easy installation. In addition, the small horizontal distance between the feeding inlet and discharging port makes it convenient to arrange the layout of the screening machinery. It can be applied to the screening of various kinds of materials.
1, wide adaptability of materials: rotary screen can be widely used for the screening of various materials such as the coal slime, soot and other materials.
2, simple feeding: the feeding inlet can be designed in accordance with the actual situation and the smooth feeding can be guaranteed without special measures.
3, large screening capacity: the circle area of the rotary sieve is larger than that of other types under the same size so that the effective screening area is larger, which helps the materials to contact with the sieve fully, thus improving the screening capacity.
Structural performance
The rotary sieve is composed of the base, housing, motor and other parts. It adopts the cylindrical mesh structure and the materials in the barrel are constantly stirred, forming the constant updates and advancement of materials. The machine can achieve satisfactory results for the screening of the materials with large viscosity and large mesh.

Impact Pulverizer/ Rock Impact Crusher

Impact Pulverizer/ rock impact crusher
Impact pulverizer is a new kind of high-efficiency crushing equipment with selective crushing effect,which has promising prospect. The rock impact crusher can resist compression and it is widely used in building materials, transportation, energy, cement, mining, chemical and other industries for crushing materials.

Advantages
1) simple structure, small size, light weight, large capacity, low production costs;
2) ore is crushed along the joint plane, which guarantees the less power consumption and high efficiency;
3) it has the selective crushing role and the granularity of the crushed product is more uniform;
4) large crushing ratio simplifies the crushing process and reduces the cost of the dressing plant;
5) the gap between the back plate and plate hammer can be easily adjusted to realize the effective control of the particle size and particle shape.
Working principle
The impact pulverizer is the crushing machine that makes use of the impact force to crush the materials. When the rock impact crusher is in operation, driven by the motor, the rotor will be in high-speed rotation. The materials will impact against the hammer on the rotor after they enter the operation area of the hammer and then the materials will be re-crushed by being thrown on the counterattack device. This process is repeated until the materials are broken to the desired particle size and then the materials will be discharged from the discharging port. In addition, the adjustment of the gap between the frame and the rotor can change the discharging granularity and the material shape.

Horizontal Kiln/ Horizontal Lime Kiln

The horizontal kiln that is also known as the horizontal lime kiln , which belongs to the class of building materials equipment. Its technical performance and operating condition largely determine the quality of the product, productivity and cost of enterprise. In the building materials industry, apart from the calcination of cement clinker, the rotary kiln can be also used to calcine clay, limestone and dry the slag and so on; in the production of refractory materials, the horizontal kiln is used for the calcination of raw materials to make its size stabile and increase its strength and then conduct the machine shaping process. In the beneficiation process, the users can use the rotary kiln to magnetic roasting the depleted iron ores so that the original weak magnetism of the ores can be changed into the strong magnetism to facilitate magnetic separation.

Technical features
1, the rolling and moving of the material is smooth and placid; the material layer is uniform and stable; the quality of clinker can be improved;
2, in the operation of the horizontal lime kiln, there is no need to change the existing process parameters, which will not consume any material, significantly improving the comprehensive economic efficiency;
3, the kiln lining, bearing bush, motor and the kiln body can be effectively protected, significantly extending the service life.
Classification
The classification of the rotary kiln: in accordance with the usage, the rotary kiln can be divided into cement rotary kiln , ceramic sand rotary kiln, kaolin rotary kiln, lime kiln; in accordance with the different effects of energy supply, it can be divided into gas rotary kiln, coal-fired rotary kiln, mixed fuel rotary kiln. In accordance with the different process, the rotary kiln can also be divided into wet and dry types rotary kiln, dry process rotary kiln, kiln dryer and so on.

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Rock Grinder

The rock grinder, which is one kind of the mining equipment , refers to the crusher that makes the content of the materials whose particle size is greater than three millimeters occupies more than 50% of the total discharging amount. The crushing operation of the mineral ore is usually divided into coarse crushing, medium crushing and fine crushing. Accordingly, there are many types of crushers.

Application and features
The rock grinder is widely used in mining, smelting, building material, highway, railway, water conservancy and chemical industry and many other sectors. It is featured with the advantages of large crushing ratio, uniform particle size, simple structure, reliable operation, easy maintenance, low costs (including operation cost, crusher price and so on) and other characteristics. For example, the impact pulverizer is suitable for the crushing of hard materials such as the crushing of limestone in cement plant , which has the advantages of large productivity and small discharging particle size.
The importance of crushing
There are a large number of raw materials and recycling waste needing to be processed with the rock grinder every year in metallurgy, mining, chemical, cement and other industrial sectors. For example, in the dressing plant, in order to achieve the monomer separation of the useful ores, there is the need to conduct the aggregate crushing of the raw mineral ores to the desired particle size. In the coking plant, sinter plant, ceramics factory, the glass industry, powder metallurgy and other departments, the crushing machine is necessary for the required particle size for the next procedure.