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Wide application of steel slag treated by steel slag

2019-11-18 parašė xuanxuan

Since there are so many steel slag formations in the industry, how do you deal with these steel slags? Vertical mill processing steel slag as an excellent production process, what is the value of vertical grinding and grinding steel slag? Steel slag vertical roller mill drives the grinding disc through the reducer The material falls from the feed port to the center of the grinding disc through the feeder, and the hot air enters the mill from the air inlet. As the grinding disc rotates, the material moves to the edge of the grinding disc under the action of centrifugal force. When it passes through the annular groove on the grinding disc, it is crushed by the grinding roller and crushed. After the crushing, the material is brought up by the high-speed airflow of the wind ring at the edge of the grinding disc, and the large particles fall directly to the grinding disc. After re-grinding, when the material in the airflow passes through the upper classifier, under the action of the rotating rotor, the coarse powder falls from the cone to the grinding disc and is re-grinded. The qualified fine powder is ground together with the airflow and collected by the dust collecting device. The product, containing moisture, is dried during contact with the hot gas stream, and can meet the requirements of different humidity materials by adjusting the hot air temperature. By adjusting the classifier, the thickness required for different products can be achieved.
1. Steel slag is used in cement production. Steel slag is a material containing silicate and iron aluminate mineral phase calcined at high temperature. It has similar chemical composition to cement clinker and has hydraulic activity, so it has gelling properties. Waste slag should partially replace or completely replace Portland cement, which is expensive to manufacture and expensive. China’s research on steel slag cement is at the international leading level. The steel slag cements currently produced mainly include steel slag slag cement, steel slag slag Portland cement, steel slag zeolite cement and steel slag ordinary cement. The production of steel slag cement generally follows the following process:
2. The physical and mechanical properties of steel slag used in road engineering steel slag depends on the treatment process. Generally, the steel slag with slow cooling treatment has large specific gravity, high hardness, anti-wear and low water absorption. It is a good aggregate for road construction and is stored for one year. The above steel slag, due to partial decomposition, the grading of the mixed steel slag is close to the asphalt concrete aggregate grading requirements. The mixed steel slag is directly used as the asphalt concrete aggregate, and the batching operation is convenient and simple. The steel slag is used as a road foundation, and not only can the steel slag be used in a large amount, but also a large amount of ground steel slag can be saved.
3. Steel slag is used in agricultural steel slag containing a large amount of calcium oxide and magnesium oxide, which can be used to improve acidic soil. Other trace elements can also increase the yield of crops. Especially if the content of P205 is above 5%, it can be used as phosphate fertilizer. There is no exact and scientific conclusion on the application research of steel slag in agriculture. The experimental research on soil type and crop species representative surface is not enough, especially the effect of steel slag fertilizer on soil structure after large application, and the trace element in steel slag Fruit transfer, fertilizer aftereffect and adaptability to soil also require long-term experimental observation, and experience is accumulated to promote the application according to local conditions.
Steel slag is used as smelting flux converter slag and flat furnace slag with high calcium oxide content. It also contains manganese oxide and iron oxide. It can not only replace limestone, but also recover useful metals. For example, steel slag is used as solvent for sintering. Steel slag has vertical grinding. The following advantages:
A. It can improve the gas transport property of the material layer, accelerate the vertical sintering speed, and achieve the purpose of strengthening sintering;
B. It can improve production efficiency, reduce energy consumption, increase reduction rate, and reduce weathering rate:
C. Reduce the cost of sintering. Practice has proved that steel slag is good for smelting flux and will not affect the quality of sinter and pig iron.

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How to solve the problem of deoxidation during stainless steel casting?

2019-11-13 parašė xuanxuan

1. In the Stainless steel casting smelting reduction stage, firstly manganese (electrolytic manganese sheet 99.7, national standard) and DNA ferrosilicon, the early DNA can reach 65% - 80% of the oxygen in most molten steel.
2. For those stubborn oxygen, the initial deoxygenation process is already weak, and the temperature and deoxidation capacity determine that the initial deoxidizer has completed the task. So who will kill the remaining oxygen?
The answer is: the final deoxygenation process! The final deoxidizer is generally a composite deoxidizer with two or more components. A lot of practice shows that when the composite deoxidizer contains various elements in molten steel, not only the operation and responsibility, but also The important thing is that they are also crowded, rather than single-handedly, which can significantly improve the deoxidation efficiency itself. Therefore, the composite deoxidizer product is designed, how to think about 1 + 1 = 3 is a very important design element, composite deoxidizer, and of course There are other important indicators that seem insignificant but are essential. For example, the theory of aluminum deoxidation is particularly good, but the problem is that aluminum has a small proportion of severe combustion losses, what should we do? Now we know that the maximum deoxidation efficiency can be achieved by adding bulk aluminum in a large container, in a caisson Aluminum is added and a feed wire is added to the aluminum wire. The deoxidizing capacity of aluminum itself is undisputed, and the insertion of liquid steel bottom becomes a key issue. Of course, aluminum deoxidation of Stainless steel casting will also bring alumina insoluble particles. In addition, the deoxidation aging time of aluminum is very short, so stainless steel is highly decontaminated with aluminum during casting.

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Detailed explanation of Zhejiang Hammer Crusher Chuck Solution

2019-11-11 parašė xuanxuan

The sandstone factory in summer is the real peak of the summer heat. Under such weather conditions, the frequency of failure of crusher equipment is much higher, mostly because the weather is too hot, causing the high temperature operation of the crusher equipment plus the crusher equipment. The inspection of the maintenance personnel was not in place. Today, the solution for the hammer hammer chuck of Zhejiang Hammer Crusher is solved!
The cause of the vibration caused by the hammer crusher is generally the occurrence of cracks on the foundation, the loosening of the anchor bolts, the wear of the bearings, and the breakage of individual hammerheads to cause the crusher to lose balance and generate vibration. The maintenance personnel checked the above problems: although there were cracks in the basic part, the anchor bolts were not loose or broken. The two rolling bearings have no internal and outer ring phenomena, and the clearances are 0.6mm and 0.18mmmm respectively. Although the clearance is large, it is impossible to cause such a large vibration. The weight of the hammerhead is in accordance with the requirements of the specification. The hammer of the crusher is slightly worn and uniform, and there is no broken hammer. All of the above cases are excluded. For further inspection, during the process of turning the rotor, it is checked whether the hammer of the crusher is stuck in the hammer plate and cannot work, thereby causing a change in the radius of gyration, and the rotor loses the dynamic balance and causes vibration. The reason for the card hammer is due to the wear of the hammer plate. Due to the wear of the hammer disc, the error width of the hammer head is not equal, so the crusher is seriously out of balance, causing severe vibration during operation.
solution
In order to prevent the hammer of the Hammer Crusher from being caught in the hammer plate, a steel plate of 40 mm × 40 mm thickness of 20 mm is first processed, and then four steel plates are welded at the position of each hammer head. It must be noted that the hammer of the crusher cannot be restrained in the direction of rotation of the hammer, and there is a certain room for movement, basically ensuring that the inner arc of the hammer of the crusher is tangent to the outer circle of the hammer of the crusher, thus ensuring The hammer head is not stuck, and it can ensure that the crusher hammer has a certain buffer during the crushing process, reducing the impact on the crusher equipment.

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Vertical roller mill is widely used in the gypsum industry and is affordable

2019-11-06 parašė xuanxuan

Gypsum is a monoclinic mineral and is a hydrate whose main chemical component is calcium sulfate (CaSO4). Gypsum is a widely used industrial and building material. Can be used in cement retarder, gypsum construction products, model making, medical food additives, sulfuric acid production, paper fillers, paint fillers, etc. The microporous structure and heat dehydration of gypsum and its products make it excellent in sound insulation, heat insulation and fire resistance. Gypsum has broad market prospects. With the further development of technology, high-quality and efficient gypsum vertical roller mill has become the preferred equipment to promote efficient gypsum powder production. SBM heavy machine focuses on the field of grinding equipment manufacturing and produces high-quality gypsum vertical roller mill. The powder machine has become the preferred gypsum equipment to enhance the competitiveness of the industry. It has the cost-effective vertical roller mill price and selection scheme, and is an ideal equipment for gypsum powder production.
1. Analysis of the use of gypsum
Gypsum is a monoclinic system with high degree of cleavage and easy to split into thin slices. The gypsum is heated by heating the gypsum to 100 to 200 ° C and losing part of the crystal water to obtain hemihydrate gypsum. It is a gas-hardening gelling material with both alpha and beta forms, all of which are rhombohedral, but with different physical properties. The α-type hemihydrate gypsum crystallizes well and is solid; the β-type hemihydrate gypsum is a plate-like and cracked crystal with fine crystals and a much larger specific surface area than α-type hemihydrate gypsum. Gypsum is the main raw material for the production of gypsum cementitious materials and gypsum construction products, and also a retarder for Portland cement. It is widely used in many applications such as construction, building materials, industrial molds and art models, chemical industry and agriculture, food processing and medical beauty. As the preferred equipment for gypsum powder production, SBM heavy machine gypsum vertical roller mill is updated on the basis of traditional mill, and various technical indicators have been greatly improved and improved, which is an ideal choice for improving gypsum milling efficiency. .
2, SBM heavy machine focuses on the quality of vertical roller mill, providing powerful equipment support for gypsum
In the field of vertical roller mill manufacturing, SBM heavy machine has rich experience and advanced production technology. It can produce 80-400 mesh high-quality powder. The whole set of equipment has large output, low energy consumption, low noise and low maintenance cost, which can effectively improve unit equipment. The unit output reduces the energy consumption per unit of output. Compared with the R-type mill with the same total power, the output of the equipment is increased by more than 40% year-on-year, and the unit power consumption cost is saved by more than 30%. It is a new type of grinding that is truly energy efficient. Powder machine equipment, combined with the actual production needs of customers, the price of gypsum vertical roller mill supplied by SBM heavy machine is scientific and reasonable, the adaptability is stronger, the quality is excellent, the performance is more stable, and the exclusive powder production line solution can be provided for different customers. Welcome to call us further.

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The stability and durability of high-efficiency sand making machine parts are also important

2019-11-05 parašė xuanxuan

The role of high-efficiency sand making machine in engineering projects is becoming more and more important. As the demand for sand making machines increases, construction machinery is also constantly improving. As an important part of the sand production line, the sand making machine plays an important role in the whole production process. The stability and durability of the parts are also important, so care must be taken in the production of these parts.
After the high-efficiency sand making machine is put into production, it is necessary to regularly clean up the blockage inside the product, and the blockage is excessive, which not only affects the output, but also affects the normal operation of the equipment. The wear of the wear block should also be known. If it is found to be worn, it should be repaired or replaced in time. Add grease at the right time and usually work for 400 hours. In the production process, it is a high-speed operation equipment, pay attention to safe production, if maintenance is required, it must be stopped before operation.
The sand making machine is a sand making device for artificial sand making. Depending on the extent and scope of the industry, high-efficiency sand making machines are widely used equipment, so the industry is often referred to as high-efficiency sand making machines. In fact, the sand making machine is not limited to an efficient sand making machine.
The high efficiency sand making machine is suitable for crushing and forming soft, medium hard and extremely hard materials. It is widely used in various ores, cement, refractory materials, aluminum clay clinker, corundum, glass raw materials, construction sand, stone and each metallurgical slag, especially suitable for high hardness, special hard and wear resistant materials. For example, silicon carbide, silicon carbide, sintered bauxite and beautiful sand are more effective than other types of crushers.
Lack of understanding and understanding of stone powder in high-efficiency sand making machines, blindly washing off stone powder, and bringing out many particles with a particle size larger than 75um. It wastes resources and destroys the natural grading of high-efficiency sand making machines, which is not conducive to obtaining the bulk density of aggregates.

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Introduction to production materials of slag vertical roller mill

2019-11-04 parašė xuanxuan

Slag is a by-product of ironmaking in blast furnace. In the process of ironmaking, iron oxide is reduced to metal iron, silica and alumina in iron ore at high temperature
And other impurities and lime reaction to form silicate and silicoaluminate as the main components of the melt, after quenching into a texture of loose, porous particles, namely blast furnace slag, referred to as slag. Slag can be classified in different ways. According to the ratio of basic oxide (CaO+MgO) to acidic oxide (M), slag can be classified as basic slag (M> 1), neutral slag (M=1) and acidic slag (M< 1); According to the type of pig iron smelting, it can be divided into cast iron slag (slag discharged when smelting cast iron), steelmaking pig iron slag (slag discharged when smelting pig iron for steelmaking) and special pig iron slag (slag discharged when smelting pig iron with iron ore containing other metals, such as manganese slag and magnesium slag). According to the cooling method, physical properties and shape, can be divided into slow cooling slag (block, powder) and quench slag (granular, fibrous, porous and pumice).
With the development of new wear-resistant materials and the continuous improvement of grinding technology, the use of vertical roller mill to grind slag has been successful, at present, domestic large iron and steel enterprises are using the vertical roller mill produced by our company for slag powder production, the equipment in the slag processing production by the user’s high praise. 300000 tons of slag vertical grinding machine manufacturers, new quotation and slag processing equipment in industry, environmental protection is particularly important in the economic development, promoting the construction of ecological civilization, adhere to the basic state policy of resource conservation and environmental protection, in the process of industrial manufacturing, emit a large amount of industrial slag, such as calcium carbide slag, blast furnace slag, steel slag, slag, non-ferrous metals, etc., as a by-product of industrial production waste has become a thorny issue of troubled companies, industrial waste residue is put in the wrong place resources, its processing is a good way to processing of renewable resources. It is understood that slag, blast furnace, ironmaking, steelmaking process the inevitable product of production.

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Broken knives are easy to damage attachments in construction waste

2019-11-01 parašė xuanxuan

Every time before the construction waste is started, it is necessary to carry out no-load operation and check the pipeline for leaks or other abnormal phenomena to avoid damage to the wearing parts. Operators should periodically inject new oil into the fragile parts of construction waste to maintain the lubricity of the consumables and replace the butter when needed.
The broken knife is an accessory that is easily damaged in the construction waste. During the crushing process, if the material is mixed with other iron materials and impurities, the blade will be damaged, so a filter is installed at the inlet. Screen out the material.
If you want to extend the use time of Construction Waste Crusher consumable parts, an effective method is to ensure the stability of the voltage during operation, not to be high or low, and to avoid overloading the equipment for a long time.
Construction waste is a machine used to smash construction waste. The so-called construction waste is what we usually call waste concrete, as well as masonry. It is generally believed that the value of construction waste itself is not large, but waste concrete and masonry can be re-constructed after construction, such as concrete, floor tiles, wall panels, etc., can be applied to the basement road.
At the same time, the construction waste is also saved a lot of landfills, avoiding soil damage and effectively protecting the environment. Based on these two points, construction waste has become the environmental guardian of the machinery industry. Reasonable operation of construction waste is broken to ensure long-term stable operation of the equipment during the production process, and at the same time, the wearing time of the wearing parts can be prolonged. Therefore, there is still a need to understand some ways to maintain consumables.

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Physical phenomena during the working of the ball mill

2019-10-30 parašė xuanxuan

From the physical phenomena and geometrical characteristics of ore crushing and ball mill grinding process, grinding is the continuation of crushing ore, which is a process of reducing the size of a nugget or ore. However, from the thermodynamic point of view, grinding is a process of internal energy increase. The grinding machine works on the ore block and overcomes the cohesion of the ore block to break it. Therefore, grinding is a process of mutual transformation. The electric energy input by the power grid is converted into mechanical energy by the electric motor, and the mechanical energy works on the grinding machine and the medium through the transmission system, and becomes the mechanical energy of the grinding medium of the ball mill. When the grinding medium falls or rolls down, it works on the ore. The work of the medium becomes the deformation internal energy of the ore, which causes the ore to deform and break. After the ore is broken, it becomes the new surface energy of the ore.
The work of deforming and breaking ore is active, and it includes deformation work and separation work. Most of the work done by the medium on the ore is lost to the surrounding medium space during the crushing process. This part is called the fracture loss force. It includes the ore and the mechanical parts and the friction work between the ore and the ore. The crushing force repeatedly acts as a loss of heat energy loss, loss of sound energy, light energy and radiant energy. A certain energy loss occurs every time an energy conversion occurs. SBM Machinery is mainly engaged in the production and sales of ball mill series equipment, steel slag ball mill, round hammer ball mill, beneficiation ball mill, lattice ball mill and other different ball mill types, can provide you with the ball mill model for your satisfaction.

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The development of jaw crusher technology is constantly seeking innovation and reform

2019-10-28 parašė xuanxuan

At present, the most widely used jaw crusher produced in China has two forms: the jaw crusher with a simple swinging crank and a double rocker mechanism. Simple pendulum jaw crusher; Jaw crusher with complex swinging crank and rocker mechanism. The former is mostly made into large or medium, and its crushing ratio is 3— 3; The latter is generally made of small and medium-sized, its crushing ratio up to 10. With the development of industrial technology, compound pendulum jaw crusher has been to the development of large-scale, has been adapted to the development needs of various industries.
Crusher has been mining, smelting, building materials, highway, railway, water conservancy and chemical industry and other industries, especially the jaw crusher is the pearl of each industry.
But with the development of the society is not broken, the technology of the crusher is constantly innovative, the type is also broken, such as: impact crusher, cone crusher, hammer crusher, impact crusher, on the roll broken. Therefore, the position of hubei jaw crusher is obviously reduced.
The scale of social demand for all kinds of metal, non-metal ore and other materials is expanding day by day. Since the 1990s, the annual amount of worn out materials in the world has reached more than 10 billion tons. China’s annual production of brittle materials has reached about 1.5 billion tons, most of these materials have to go through the grinding, crushing and grinding engineering in the national economy plays a huge role.
Therefore, under the stimulation of various factors, our company has continuously improved and innovated the technology of hubei crusher: optimize the structure and movement track: improve the crushing cavity, in order to increase the crushing ratio, improve the crushing efficiency, reduce wear and tear, reduce energy consumption, has been widely used in high crushing cavity and small Angle; Improve the suspension of the jaw and the support of the lining plate, improve the performance of the crusher. Improve the level of automation (automatic regulation, overload protection, automatic lubrication, etc.).

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Influencing factors and precautions of precision casting dimensional accuracy defects

2019-10-25 parašė xuanxuan

Under normal circumstances, the dimensional accuracy of precision casting is affected by many factors such as the structure of the casting, the material of the casting, the molding, the shell, the roasting, and the casting. Any setting or unreasonable operation will change the shrinkage of the casting. The dimensional accuracy of the casting is deviated from the requirements. The following are factors that can cause defects in the precision of precision castings:
(1) Influence of casting structure: a. The wall thickness of the casting is large, the shrinkage rate is large, the casting wall is thin, and the shrinkage rate is small. b. The free shrinkage rate is large, which hinders the shrinkage rate.
(2) Influence of casting material: a. The higher the carbon content in the material, the smaller the linear shrinkage rate, and the lower the carbon content, the larger the linear shrinkage rate. b. The casting shrinkage of common materials is as follows: casting shrinkage K = (LM-LJ) / LJ × 100%, LM is the cavity size, and LJ is the casting size. K is affected by the following factors: wax mold K1, casting structure K2, alloy type K3, casting temperature K4.
(3) The influence of mold making on the shrinkage rate of castings: a. The effect of wax temperature, wax pressure and dwell time on the size of the investment is obvious. The temperature of the wax is obvious, followed by the pressure of the wax, and the pressure holding time is guaranteed. After the investment molding, the influence on the final size of the investment mold is small. b. The linear shrinkage of the wax (molding) material is about 0.9-1.1%. c. When the investment mold is stored, further shrinkage will occur, and the shrinkage value is about 10% of the total shrinkage amount, but after 12 hours of storage, the investment size is substantially stable. d. The radial shrinkage of the wax mold is only 30-40% of the shrinkage in the longitudinal direction, and the effect of the wax temperature on the free shrinkage is far greater than the effect on the resistive shrinkage (the preferred wax temperature is 57-59 ° C, The higher the temperature, the greater the shrinkage).
(4) Influence of shell material: Zircon sand, zircon powder, Shangdian sand, Shangdian powder, because of its small expansion coefficient, is only 4.6×10-6/°C, so it can be ignored.
(5) Effect of shell roasting: Since the coefficient of expansion of the shell is small, when the shell temperature is 1150 ° C, it is only 0.053%, so it can be neglected.
(6) Effect of casting temperature: The higher the pouring temperature, the larger the shrinkage rate, the lower the casting temperature and the smaller the shrinkage rate, so the pouring temperature should be appropriate.

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