Washing separation device containing powder block material and separation method thereof

Abstract

The invention discloses a washing separation device containing a powder block material, which is characterized in that more than one elutriation device is arranged near a water channel, the elutriation device comprises an elutriation basket, a connecting rod and a rotary device, the rotary device drives the elutriation basket to horizontally rotate through the connecting rod, and the elutriation basket enters downside of the water surface of the water channel in the elutriation process. The washing separation method of the device comprises the following steps of: firstly, guiding a powder-containing lump ore into the elutriation basket below the water surface of the water channel for soaking; then driving the elutriation basket for rotary motion by the rotary device through the connecting rod, rotating to the left for 10 times, and then rotating to the right for 10 times, repeating the steps to realize elutriation, elutriating the powder-containing lump ore for many times, raising the elutriation basket out of the water surface by the rotary device through the connecting rod, then transferring to a conveying belt of a finished ore product by a material-receiving hopper and then transporting to a finished product ore storage yard. After the block material is separated by the device, a net powder-containing rate can be reduced to about 3.0% and the sieving efficiency reaches 92% under the circumstance that the net powder-containing rate is 35% and 25% and the water-containing rate is 6.5% and 5.5%.

Description

technical field [0001] The invention belongs to the field of material separation, and in particular relates to a water washing separation device and a separation method for powder-containing bulk 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 r...

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

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