Pelletizing system and pelletizing method

A ball-forming and ball-making technology, which is applied to the ball-forming system and the field of ball-forming, can solve the problems of reduced operation rate, large amount of returned material, and poor pellet strength, so as to improve the strength and ball-forming rate, and meet the requirements of strength. , The effect of improving the strength of the pellet

Pending Publication Date: 2018-05-04
SHENWU TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When pressing balls for different materials, due to the different properties of the materials themselves, it is necessary to repeatedly adjust various parameters of the ball pressing machine to adapt to different materials, resulting in extremely unstable performance parameters of the pressed pellets, and it is difficult to ensure the strength of the pellets
Especially the red mud material has a particularly high requirement for moisture. If the moisture is too high, it will easily form mud and roll sticking phenomenon, and it is difficult to clean, reducing the operation rate. If the moisture is too low, it will be difficult to form pellets. in industrial production
[0004] To sum up, in the prior art, the powder is directly pressed into balls, the rate of raw materials into balls is low, the amount of returned materials is large, the equipment operation rate is low, and various parameters in the ball pressing process are difficult to control. In addition, the powder is directly pressed into balls , the strength of the pellets is difficult to guarantee, and cannot meet the requirements of actual production for the strength of the pellets

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0062] Red mud is used as raw material, and a certain amount of reducing agent, limestone and binder are mixed in the mixing device. The ratio of red mud: reducing agent: limestone: binder is 100:17:8 : 3, add 8% water to the raw material in the mixing device, and the mixed material enters the disc pelletizer for water spray granulation, and the amount of water added is 10% of the mass percentage of the mixed material to ensure that the granular The water content of the material is 17-19%, and the size of the fine particles obtained by the disc pelletizer is 4-5mm. Adjust the parameters of the briquetting machine. The size of the ball socket is: length 32-36mm, width 24-30mm, depth 8-12mm, the distance between the rollers of the briquetting machine is set to 0.5mm, and the pressure on the rollers is set to 10MPa. The frequency of the pre-pressing screw is 40Hz, and the frequency of the main machine is 25Hz. Under the conditions of the ball pressing parameters, the final red mu...

Embodiment 2

[0066] Red mud is used as raw material, and a certain amount of reducing agent, limestone and binder are mixed in the mixing device. The ratio of red mud: reducing agent: limestone: binder is 100:17:8 : 3, the raw material is added 10% water in the mixing device, and the mixed material enters the disc pelletizer to carry out water spray granulation molding, and the amount of water added is 6% of the mass percentage of the mixed material to ensure that the granular The water content of the material is 17-19%, and the size of the fine particles obtained by the disc pelletizer is 4-5mm. Adjust the parameters of the ball-pressing machine in the ball-pressing system. The size of the ball socket is: length 32-36mm, width 24- 30mm, depth 8-12mm, the distance between the rollers of the briquetting machine is set to 2mm, the pressure on the rollers is set to 16MPa, the frequency of the pre-pressing screw is 50Hz, and the frequency of the main machine is 32Hz. Under the conditions of the...

Embodiment 3

[0068] Red mud is used as raw material, and a certain amount of reducing agent, limestone and binder are mixed in the mixing device. The ratio of red mud: reducing agent: limestone: binder is 100:17:8 : 3, the raw material is added 9% water in the mixing device, and the mixed material enters in the disc pelletizer and carries out water spray granulation molding, and the amount of adding water is to account for 7% of the mass percentage of the mixed material, to ensure granular The water content of the material is 17-19%, and the size of the fine particles obtained by the disc pelletizer is 4-5mm. Adjust the parameters of the ball press machine. The size of the ball socket is: length 32-36mm, width 24-30mm, depth 8 ~12mm, the distance between the rollers of the briquetting machine is set to 1mm, the pressure on the rollers is set to 13MPa, the frequency of the pre-pressing screw is 44Hz, and the frequency of the main engine is 28Hz. The ball rate is 98.2%. The length of the sha...

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Abstract

The invention relates to a pelletizing system. The pelletizing system comprises a mixing device, a pelletizing device and a briquetting device. The mixing device is used for mixing raw materials and provided with a raw material inlet and a mixture outlet. The pelletizing device is used for making mixtures into particles and provided with a mixture inlet and a particle outlet. The mixture inlet isconnected with the mixture outlet of the mixing device. The briquetting device is used for pressing the particles into pellets and provided with a particle inlet and a pellet outlet. The particle inlet is connected with the particle outlet of the pelletizing device. The invention further provides a pelletizing method using the pelletizing system. According to the pelletizing system and method, accurate moisture control in the briquetting process is achieved, and pelletizing is conducted before briquetting, so that the strength and success rate of the pellets are improved, and accordingly, therequirement for industrial production is met.

Description

technical field [0001] The present invention relates to the field of ball forming equipment, and more specifically, to a ball forming system and a ball forming method. Background technique [0002] In metallurgy, mining, coal, refractory materials, chemical industry, building materials and other industries, it is usually necessary to treat some materials such as iron concentrate powder, chromite ore powder, copper concentrate powder, copper slag, chromium ore powder, manganese ore powder, laterite nickel ore, Lead and zinc waste, bauxite, red mud, non-ferrous metal powder, quicklime powder, dolomite powder, iron-containing powder in steel mills, etc. are used to make pellets for smelting and direct reduction. The method is to mix the above-mentioned powder with a binding agent and a reducing agent, and go through production processes such as mixing, pressing, drying and the like. The key process is pellet forming. In order to increase the output and ensure the strength of t...

Claims

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Application Information

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IPC IPC(8): C22B1/242
CPCC22B1/2406C22B1/242
Inventor 王福佳古明远王建华王敏曹志成王健月吴道洪
Owner SHENWU TECH GRP CO LTD
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