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Powder containing lump ore conveying system

A conveying system and powder nugget technology, which is applied to conveyors, conveyor objects, mechanical conveyors, etc., can solve the problems of increased ironmaking costs in blast furnaces, high powder content of ingots entering the furnace, affecting the stability of blast furnaces, etc. Achieve the effect of reducing the cost of blast furnace ironmaking and increasing the proportion of the furnace

Active Publication Date: 2013-03-27
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

Method used

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  • Powder containing lump ore conveying system
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Depend on figure 1 It can be seen that the powder-containing lump ore is transported to the transfer station through the unloading belt of the dock, and the moisture content and powder content are measured at the transfer station. When the powder content reaches the requirements for entering the blast furnace, the powder-containing lump ore is directly transported to the sieve-free funnel; When the powder content rate does not meet the requirements of blast furnace feeding and the water content is less than 4%, the powder-containing lump ore is transported to the vibrating screen for screening, the lump ore on the screen is sent to the blast furnace, and the powder ore under the screen is sent to sintering or pelletizing Or pelletizing; when the powder content rate does not meet the blast furnace requirements and the water content is greater than 4%, the powder-containing lump ore is sent to the soaking elutriation device, and the viscosity of the powdery material is red...

Embodiment 2

[0024] Depend on figure 1 It can be seen that the powder-containing lump ore is transported to the transfer station through the unloading belt of the dock, and the moisture content and powder content are measured at the transfer station. When the powder content reaches the requirements for entering the blast furnace, the powder-containing lump ore is directly transported to the sieve-free funnel; When the powder content rate does not meet the requirements of blast furnace feeding and the water content is less than 4%, the powder-containing lump ore is transported to the vibrating screen for screening, the lump ore on the screen is sent to the blast furnace, and the powder ore under the screen is sent to sintering or pelletizing Or pelletizing; when the powder content rate does not meet the blast furnace requirements and the water content is greater than 4%, the powder-containing lump ore is sent to the soaking elutriation device, and the viscosity of the powdery material is red...

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Abstract

The invention discloses a powder containing lump ore conveying system, comprising a belt conveying system and a separating device. The invention is characterized in that powder containing lump ore is conveyed to a vibrating screen to be separated when moisture content is less than 4%, oversize product after screening is conveyed to a blast furnace, and screenings is subject to sintering; and powder containing lump ore is conveyed to a soaking and washing device to be separated when moisture content is more than 4. Net powder content of lump ore after being separated by the soaking and washing device can be reduced to about 3.5%, and screening efficiency meets the requirement of charging of blast furnace. Thus, even if in rainy season or moisture content of lump ore is high, lump ore which can be still used is charged, charging ratio of lump ore is improved, and blast furnace ironmaking cost is reduced.

Description

technical field [0001] The invention belongs to the field of material conveying, in particular to a conveying system for powder-containing lump ore in the field of mines and metallurgy. Background technique [0002] Lump ore containing fines is conveyed from the wharf through a belt, and the lump ore and fine ore are screened by a vibrating screen during the transportation. The lump ore is sent to the blast furnace, and the fine ore under the screen is sent to sintering or pelletizing or pelletizing. However, when the humidity is high or the moisture content of the material is high, the powder ore and the lump ore are bonded to each other. At this time, it is difficult to separate the lump ore and the powder ore by using a vibrating screen. 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 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65G37/00B65G49/02B65G17/12B03B5/62
Inventor 金俊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
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