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Separation device and method of block material and powdered material

A technology of powdery materials and bulk materials, which is applied in the fields of mining, metallurgy, and material separation, can solve the problems of large water consumption and sewage treatment, high powder content of lump ore entering the furnace, and affecting the stability and smooth operation of the blast furnace, etc., to achieve High screening efficiency, good powder removal effect, beneficial to sedimentation and concentration

Inactive Publication Date: 2011-01-12
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This vibrating sieving method has high screening efficiency in non-rainy seasons or when the original water content of lump ore is low (<4%), and is easy to operate and low in cost. It is a mature, economical and effective way to reduce the powder content of lump ore. However, in the rainy season or when the water content of the lump ore is high, the powder ore in the lump ore is muddy and sticks to the lump ore. At this time, it is difficult to effectively remove the powder ore of the lump ore by using a vibrating screen, which eventually leads to the lump ore entering the furnace. The high powder content of the ore affects the stability of the blast furnace
Therefore, in order to reduce the impact of fine ore contained in lump ore on the blast furnace, enterprises have to reduce the proportion of lump ore entering the furnace in this case, resulting in an increase in blast furnace ironmaking costs
Domestic iron and steel enterprises also use water spraying to remove powder from lump ore. For example, Jinan Iron and Steel Co., Ltd. has established a set of off-line jigging water washing and grading treatment system for lump ore with high powder content, but it occupies a large area and is difficult to wash ore. The time is long, the processing capacity is relatively small, the water consumption and sewage treatment volume are large, and the operating cost is relatively high

Method used

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  • Separation device and method of block material and powdered material
  • Separation device and method of block material and powdered material
  • Separation device and method of block material and powdered material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Depend on figure 1 It can be seen that the lump ore with a net powder content of 25% and a water content of 7.5% is introduced into the elutriation device (3) under the water surface of the water tank (19) by the vibrating feeder (1) through the bar screen chute (2) to realize soaking ; Then the lifting device (4) runs obliquely upward at a speed of 0.1m / s~1.0m / s to lift the lump ore in the elutriation device (3) to the water surface to 0.3m~2.0m, and pour it into the next level of lifting after turning over The elutriation device of machine (4) realizes elutriation. After the lump ore has been washed for many times, it is lifted from the water surface by the lifting device (4), and then transferred to the finished ore conveyor belt (9) by the receiving hopper (8), and transported to the finished ore storage yard; figure 1 and image 3 It can be seen that one end of the lifting device (4) is immersed in the water, and the other end is higher than the water surface, ...

Embodiment 2

[0036] Depend on figure 1 It can be seen that the lump ore with a net powder content of 30% and a water content of 6.5% is introduced into the elutriation device (3) under the water surface of the water tank (19) by the vibrating feeder (1) through the bar screen chute (2) to realize soaking ; Then the lifting device (4) runs obliquely upward at a speed of 0.1m / s~1.0m / s to lift the lump ore in the elutriation device (3) to the water surface to 0.3m~2.0m, and pour it into the next level of lifting after turning over The elutriation device of machine (4) realizes elutriation. After several times of elutriation, the lump ore is lifted from the water surface by the lifting device (4), and then transferred to the finished product ore conveyor belt (9) by the receiving hopper (8), and transported to the finished product ore storage yard; one end of the lifting device is immersed in In the water, the other end is higher than the water surface, and the lifting device is arranged obl...

Embodiment 3

[0039] Depend on figure 1 It can be seen that the other parts of the separation device for lumpy materials and powdery materials are the same as in Embodiment 1 or 2. In order to improve the separation effect, after the lump ore is washed for many times, when the water surface is proposed for the last time, new water (5) is used to add and circulating water (7) flush the lump ore through the flushing nozzle (6), then transfer it to the finished product ore conveyor belt (9) by the receiving hopper (8), and transport it to the finished product ore storage yard.

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Abstract

The invention discloses a separation device of a block material and a powdered material. The device is characterized in that more than one lifting devices are arranged in a water tank, wherein one end of each lifting device is soaked in the water, the other end is higher than the water surface; the lifting devices are in inclined arrangement, the ends soaked in the water are close to the charging end of the water tank, the other ends higher than the water surface are near the discharging end of the water tank; and each lifting device comprises a chain, a chain wheel and a transmission device, and an elutriation device is arranged on the chain. After the block material with the net powder content of 25% or 30% and the moisture content of 7.5% or 6.5% is separated by the device of the invention, the net powder content of the block material can be reduced to about 3.5% and the screening efficiency is up to 90%.

Description

technical field [0001] The invention belongs to the field of material separation, in particular to a device for separating block materials and powder materials in the fields of mines and metallurgy. Background technique [0002] Lumpy materials and powdery materials are usually sieved by a vibrating sieve, but when the humidity is high or the moisture content of the material is high, the powdery material and the bulky material are bonded to each other. At this time, it is difficult to separate the bulky material from the powdery Material separation. In the field of mining and metallurgy, it is often necessary to separate the fine ore from the lump ore. With the changes in the iron ore resource market, the demand for lump ore by iron and steel enterprises continues to increase, and the powder content of the lump ore that is directly fed into the furnace is required to be lower and lower. However, the actual imported lump ore is relatively soft, with long transportation dista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B5/62
Inventor 苏允隆黄发元宋灿阳李小静刘自民张晓萍刘英才秦学武
Owner MAANSHAN IRON & STEEL CO LTD