A kind of steel slag-cyanide tailings cementitious material and its preparation method and application

A technology for cyanide tailings and cementitious materials, which is applied in chemical instruments and methods, sustainable waste treatment, solid waste management, etc. Simple preparation method
CN112408831BActive Publication Date: 2022-02-08HEBEI UNIV OF ENG +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEBEI UNIV OF ENG
Publication Date
2022-02-08

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Abstract

The invention proposes a steel slag-cyanide tailings cementitious material and its preparation method and application. The steel slag-cyanide tailings cementitious material is composed of the following substances in mass percentage: 30-60% of iron-selected waste slag, 10-20% of aerated concrete waste, 15-25% of calcium carbide slag, and 10-30% of desulfurized gypsum %. Carbide slag is calcined, cooled naturally, and ground; aerated concrete waste is crushed, dried, and ground; after desulfurization gypsum is ground, it is mixed with steel slag-cyanide tailings iron selection waste in proportion to prepare steel slag-cyanide tailings cementitious material. The cementitious material is mixed with portland cement to prepare steel slag-cyanide tailings cement. The preparation method of the invention is simple and easy to implement, can realize the coordinated utilization of various wastes, increase the added value of the wastes, reduce the production cost of cement, and has good social and economic effects.
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Description

technical field

[0001] The invention belongs to the technical field of metal recycling, and in particular relates to a steel slag-cyanide tailings cementitious material and a preparation method and application thereof. Background technique

[0002] Cyanide slag is the waste slag discharged after domestic gold smelting. The national gold industry discharges a large amount of cyanide slag every year. With the continuous development of production, the annual discharge of cyanide slag has increased. Especially in recent years, with the continuous improvement of the production process, the cyanidation method has been widely used, and the corresponding large discharge of cyanidation tailings has brought some serious problems. Whether it is the cyanide tailings of flotation gold concentrate or the whole mud cyanide slag, the common feature is that the particle size of the slag is very fine. More than 99% of the gold mines are less than 350 mesh, and more than 80% of the gold mines...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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