Technology for using steel dregs

Abstract

The invention is a new environmental-protection using process of steel slags, crushing the slags by a multi-stage crushing system, and then adopting progressive iron magnetic separation system to make magnetic separation and screening process; drying the tail slags after eliminating the irons and transferring in a tube-type mill for powder milling; eliminating the irons from the fine powder by magnetic separation system, and separating the powder by a high-performance powder separator and a box-type dust cleaning device, and the separated fine powder is steel slag micropowder product, and the rough material is returned to the tube-type mill for milling fine, and the specific area of the product is greater than 450 sq m / kg. The mcropowder can act as a mixture of high-activity concrete of building material systems. Its advantages: the iron eliminating effect of the process is good and it can produce the steel slag micrpowder product, increasing the added-value of the product.

Description

technical field [0001] The invention relates to a new technology for environmental protection utilization of steel slag in the field of metallurgy. Background technique [0002] At present, there are various steel slag treatment processes at home and abroad, and most of the red hot steel slags are treated by water quenching, water heating and stuffing. Especially the steel slag after hot stuffy treatment, because it is not completely pulverized during the treatment process, there are still many large slag blocks, and the hardness is high, so a large amount of slag is accumulated in the slag treatment plant, forming a slag mountain. After the pulverized steel slag undergoes simple magnetic separation, the iron-rich part is recycled, and finally the tailings with less iron content are discarded for storage or partially mixed into cement ingredients due to its low utilization value. Since the steel slag is hard and difficult to grind, it affects the output of the mill, so it i...

AI Technical Summary

Problems solved by technology

Since the steel slag is hard and difficult to grind, it affects the output of the mill, so it is mixed with little or no amount in the cement ingredients, and has not been widely used in cement, forming a large accumulation of tailings, occupying land, causing environmental pollution

[0003] At present, there are domestic enterprises that grind the tailing slag into a new product of steel slag micropowder. However, in the steel slag treatment process, the treatment of monofine iron in the tailing slag is not thorough. The grinding efficiency of the mill is affected, the output is reduced, and a large production scale cannot be formed