Rotary kiln of ore powder dryer

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2. As for the difference between rotary kiln and drying, some users may not be interested in this topic and feel that there is something to say. Literally, we can understand the role of these two kinds of equipment in proction. In addition, it is unnecessary for this part of users, but it is very important for users just engaged in the mining instry, Because they have just been engaged in this instry and don't know much about it, the following is explained by commillion Environmental Protection Technology Co., Ltd.:
rotary kiln can be regarded as a reced version of dryer, but on the contrary, rotary kiln is mainly for the proction and processing of building materials, with physical and chemical changes stopped outside
to clarify the difference between the two kinds of equipment with rotary kiln equipment owner
first, there is a clear distinction between the two types of equipment in terms of structure, that is, there is no board reading device in the equipment, while the board reading device is installed in the dryer< Second, the temperature accepted by the rotary kiln in proction can reach thousands of degrees, while the dryer can't accept only a few network temperatures
thirdly, the equipment is longer than the dryer in diameter and length< The main function of the equipment in proction is to calcine materials, while the main function of the dryer in proction is only to dry materials
fifthly, when the rotary kiln disposes the material, it causes the material to have a chemical reaction, while the dryer does not cause the material to have a chemical reaction when it disposes the material, it only removes the moisture contained in the material
from the aspect of appearance, the diameter ratio and length ratio of rotary kiln are more than 10, while that of dryer is less than 8. The impression is that the rotary kiln is very slender, and the dryer is thick and short.

3. Rotary kiln can be regarded as the dryer of enlarged version, but it is not the same. Rotary kiln is mainly for the proction and processing of building materials, in which physical and chemical changes are carried out
the dryer is mainly aimed at high humidity materials. The materials are subject to simple physical changes through the inside of the cylinder. The purpose of drying is achieved by evaporating water
the rotary kiln and rotary dryer are similar in appearance and structure, and belong to the same category as drying procts. It's just that the structure of the detail design is slightly different, and the purpose is also different
usage determines the structure, so we should distinguish from usage first. The rotary kiln mainly requires high temperature. The inner part of the cylinder is inlaid with refractory bricks. Generally, the temperature is in the range of 800-1300 ℃. It is mainly used to burn raw materials requiring high temperature, such as cement clinker calcined in cement plant, and magnetization roasting of iron and steel ore in metallurgical instry in metallurgical chemical kiln; Oxidation roasting of chromium, nickel and iron ore; Bauxite is roasted in refractory plant, clinker and aluminum hydroxide are roasted in aluminum plant, chromite sand and chromite powder are roasted in chemical plant. Lime kiln (i.e. active lime kiln) is used for roasting activated carbon in iron and steel plant and ferroalloy plant and for light burning white stone removal. In the field of instry and mining, all materials need to be roasted by rotary kiln. This is the main use of rotary kiln. For some materials requiring high temperature, rotary kiln is generally used, which is mainly used for calcination to change the properties of materials
in terms of structure, the cylinder of rotary dryer is a horizontal rotary cylinder, and various kinds of plates with different staggered arrangement angles are welded from front to back. Different types of refractory bricks are inlaid in the rotary kiln according to the requirements, and the door ring and spiral plate are set at the feeding end to prevent material pouring
the rotary kiln is equipped with wheels for supporting. The cylinder is supported on the supporting wheel device through the front and rear wheel belts, and the retaining wheel is set on the rear supporting wheel device to control the axial movement of the cylinder. The rotation of the cylinder is driven by the transmission device through the pinion, which is fixed on the outer diameter of the cylinder
simple distinction from the appearance: the diameter ratio and length ratio of rotary kiln are generally more than 10, while the dryer is generally less than 8. The impression is that the rotary kiln is very slender, and the dryer is thick and short.

4.

What should be paid attention to when using rotary kiln dryer? Rotary kiln dryer is a large equipment, usually use must be in accordance with the dryer operating proceres, not only to ensure the use of drum dryer time, and does not cause material waste, more economical

The rotary kiln dryer is widely used because of its special structure. The operation of drum dryer is very important in the process of use. If the operation is not correct, it is easy to cause material waste and serious economic losses. What are the matters needing attention in the work of rotary kiln dryer

The temperature of the rotary kiln dryer should be controlled well, and the dryer can not adapt to the waste heat flue gas whose temperature is less than 350 ℃ as heat source for drying materials

2. If there is a phenomenon that the particle size of the material becomes larger ring the drying process, it should be solved in time, otherwise the drying effect of the material will be affected

3. The dryer system should use the microcomputer monitoring and control system, which can not only timely monitor and control the material, air, coal, etc., but also operate conveniently. If the monitoring and control can not be carried out well, the drying system of the rotary kiln dryer can not play its role. With the operation and control equipment, the proct can be more refined and better

with the development of science and technology, the technology of dryer has been improved continuously, and the drying equipment has been used to dry the materials instead of the natural wind. At present, there are many kinds of drying equipment, such as yeast dryer, rotary kiln dryer, sawst dryer, biogas resie dryer, sludge dryer and so on. Different materials should use different drying equipment, and before using the equipment, it is necessary to read the use regulations in detail, otherwise the materials will not achieve the expected drying effect e to improper operation of some details

For some materials that are not easy to dry, the residence time should be longer, rather than strengthening the external drying conditions. The combination state of material and moisture is the key factor that determines the difficulty of material drying, and also determines the level of energy consumption and the length of stay in the dryer equipment

The physical properties of materials generally include density, heat capacity and adhesion. If the adhesion is very high, the drying process can not be carried out

Some materials will change when heated, such as discoloration, decomposition and deterioration. In addition, the shrinkage of the material in the drying process will make the material deformation or cracking, resulting in material quality rection or even scrap

5.

There are two ways to solve the problem:

1. increase the temperature of flue gas out of the kiln

2. cyclone st collection system for heat preservation< br />

6. Weifang Zhengkai Machinery Co., Ltd. is a limited liability company (invested or controlled by natural person) registered in Weicheng District, Weifang City, Shandong Province on November 16, 2009. Its registered address is located in the northeast corner of the intersection of Fushou West Street and West 2nd Ring Road, Weicheng district
the unified social credit code / registration number of Weifang Zhengkai Machinery Co., Ltd. is 913707026968906617, which is Hu Xiaochun, the legal person of the enterprise. At present, the enterprise is in business
the business scope of Weifang Zhengkai Machinery Co., Ltd. is: processing and sales: no burning brick machine, two-stage vacuum extruder and accessories, rotary dryer, rotary kiln, mixer, batching machine; Proction and sales: Cement hollow brick; Import and export of goods and technology Projects subject to approval according to law

7. The new slime dryer proced by Zhengzhou Xinshun mineral processing machinery only has the following performance characteristics: 1. High efficiency. According to the automatic material detection system, the new slime dryer controls the conveying and discharging of drying materials, so as to achieve the efficient proction of drying materials. The moisture of drying materials can be controlled intelligently and adjusted according to the needs. The new type of slime dryer can eliminate the occurrence of material jam and blockage, significantly improve the output and rece energy consumption. 2. Energy saving, 1. Electricity saving, the new type of slime dryer adopts adjustable heat coefficient, which not only effectively controls st and avoids sandstorm, but also saves power and reces a lot of power generated by the dryer barrel. 2. High cost performance. For the same output of slime dryer, the new type of slime dryer can save 15-20kg of standard coal per ton, save 30kW of power, and increase the output by 40%. 3. Environmental protection: the new coal slime dryer adopts hot air filtration technology and is equipped with automatic st collection and environmental protection equipment. The st emission meets the standard. The investment in environmental protection equipment only accounts for 10% of the total equipment investment, changing the situation of large investment and high operation cost of traditional dryer environmental protection equipment. The above content is summarized by Xinshun mineral processing machinery company according to the actual proction experience, please do not , in order to avoid the same!

8. You can learn about Jiangsu Haijian Co., Ltd., which specializes in rotary kiln, ball mill and dryer

9. How to calculate the total speed ratio of rotary kiln 1) After the motor is selected, the total speed ratio is = nd / N = 8.526 can be determined by the motor speed and rotary kiln (or cooler) speed 2) The pitch circle diameter of rotary kiln gear ring is df2. The spring plate between the gear ring and the cylinder needs a certain space to be installed. Therefore, the test molus m is determined by D; It can be selected according to the motor power (single side power in case of double drive). So as to improve the transmission stability, rece the weight and improve the machining accuracy. At present, it tends to rece the molus, increase the number of teeth and Z1 + Z2.) The angle of the lower part of the dryer is 10 ~ 200 larger than that of the upper part. The material has strong adhesiveness and large initial moisture. When the material is powdery, the angle should be larger, which is concive to blanking. On the contrary, the material has good fluidity and small initial moisture, The angle should be smaller to slow down the cutting speed, so that the material can fully carry out heat exchange. Compared with the traditional dryer, the high-efficiency anti blocking material vertical dryer uses the heat exchange technology combined with a number of advanced instruments and equipment technology of Chenggong company. It makes full use of the heat exchange principles such as heat conction, convection, radiation and fluidization. It slides naturally by gravity, applies an external insulation layer, and fully realizes the heat exchange and self power by the heat dissipation and heat conction function of heat-resistant and wear-resistant alloy steel components, According to the viscosity, molecular structure, movement characteristics and moisture of different materials, the angle of cone and disc, the size and arrangement of cone holes, and the group distance of cones should be adjusted reasonably to ensure that the moisture of discharged materials reaches the expected effect. It can be used for drying slag, clay, coal gangue, fly ash, etc. it can also be used for drying gypsum powder, boron ore, molding sand, ore, dry powder mortar and other materials in chemical, construction, metallurgical and foundry instries.

10. The annual processing capacity of raw ore for single proction line of high alumina clay mineral processing enterprises in China should be more than 50000 tons. The recovery rate of mineral processing should be over 80%; The annual proction capacity of high alumina clay clinker processing enterprises shall not be less than 5