A stage grinding method of steel slag-industrial by-product gypsum composite powder
A technology of by-products and composite powder, which is used in the removal of solid waste and grain treatment, can solve the problems of easy adhesion to grinding equipment, high iron content in steel slag, and difficulty in grinding, so as to improve the usable value, the ratio of The effect of high surface area and low moisture content
Active Publication Date: 2020-11-13
QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD +1
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Problems solved by technology
[0008] For this reason, an object of the present invention is to propose a stage grinding method of steel slag-industrial by-product gypsum composite powder to solve the problem of high iron content in steel slag and difficulty in grinding, and the industrial by-product gypsum is easy to adhere to grinding alone Grinding equipment, easy over-grinding, and easy agglomeration
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[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] A steel slag-industrial by-product gypsum composite powder stage grinding method provided by the invention adopts pre-iron removal, two-stage crushing and two-stage grinding to realize the grinding of steel slag and industrial by-product gypsum to achieve steel slag and industrial by-product gypsum The synergistic utilization of two kinds of industrial solid wastes is implemented in the following ways:
[0031] First of all, after feeding and weighing the large steel slag with a maximum particle size of about 100mm, the large...
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Abstract
The invention discloses a stage grinding method for steel slag and industrial by-product gypsum composite powder. Through iron removal in advance, large-particle metallic iron in large-piece steel slag is removed, and the conditions that the large-particle iron enters a crusher and the crushing efficiency is affected are avoided; two-stage crushing is combined with sorting as well as iron removal,so that the problem that the circulation load of a pipe mill is increased if a large amount of metal iron with the poor grinding performance enters the mill is solved; during second-stage grinding, industrial by-product gypsum and the steel slag are mixed and ground, the condition that the industrial by-product gypsum is prone to adhering to equipment, is prone to being excessively ground and isprone to agglomerating during single grinding is avoided, materials are effectively mixed to obtain the steel slag and industrial by-product gypsum composite powder with the low iron content, the highspecific surface area and the low water content, and the coordinated utilization of two industrial solid wastes including the steel slag and the industrial by-product gypsum is promoted.
Description
technical field [0001] The invention relates to the technical field of comprehensive utilization of industrial solid waste, and more specifically relates to a stage grinding method of steel slag-industrial by-product gypsum composite powder. Background technique [0002] Steel slag can be used in concrete, cement, water stabilization layer in road construction, etc. The technical barriers to the utilization of steel slag are: the iron content in steel slag is high, and it is not only difficult to achieve the particle size required for mass utilization by a single grinding method, but also consumes a lot of energy for grinding. The method of comprehensive utilization of iron removal and stage grinding can not only reduce energy consumption , At the same time, fine-grained steel slag powder can be obtained. [0003] The composition of industrial by-product gypsum is the same as that of natural gypsum, namely calcium sulfate dihydrate. Because it contains a large number of su...
Claims
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IPC IPC(8): B09B3/00B02C23/08
CPCB02C23/08B09B3/00
Inventor 巴浩静倪文吴伟王玉峰蔡水生汪坤杜惠惠李颖王雪
Owner QIANAN WEISHENG SOLID WASTE ENVIRONMENTAL PROTECTION IND CO LTD