Preparation method of high-performance magnesium slag

Abstract

The invention relates to a preparation method of high-activity high-stability high-performance magnesium slag, which solves the problems of difficulty in effective utilization of metal magnesium slag and the like due to high tendency to powdering, instable mineral composition, coarse particles, poor stability and low activity in the existing accumulated and discharged magnesium slag. High-temperature magnesium slag, which is just discharged out of the tank in a Pidgeon magnesium smelting process, is used as the main raw material to prepare the high-activity high-stability metal magnesium slag by a dilute acid solution spraying process, thereby enhancing the utilization ratio of the magnesium slag and lowering the environmental pollution. The method is simple, and has the advantages of wide raw material sources and low price. The treated magnesium slag has the advantages of fine particles, loose structure, lower powdering ratio, high active component content in minerals and low expansion ratio, and is easy for milling. The treatment method is easy to master, and has the characteristics of high cooling speed, short production cycle and the like; the technical indexes of the magnesium slag product can satisfy the standard requirements for architectural waste slag; and the method fuses the concept of environmental protection, and thus, has higher economic and social benefits.

Description

technical field [0001] The invention relates to a method for preparing high-performance magnesium slag with high activity and good stability. Specifically, it uses the high-temperature magnesium slag just out of the tank produced by the Pidgeon method as the main raw material, and quenches it by spraying dilute acid solution. A method for processing and preparing high-performance magnesium slag with high activity and good stability. Background technique [0002] Pidgeon method to produce metallic magnesium is to calcinate dolomite to obtain CaO·MgO, then add ferrosilicon (silicon accounts for more than 75%), pulverize and mix to form agglomerates, put the agglomerates into vacuum and heat reduction to generate magnesium vapor , and finally cooling the magnesium vapor to make magnesium crystals, the reduction temperature is about 1200°C, and the temperature of the magnesium slag leaving the tank is about 1000-1200°C. Natural cooling slag is a gray-white powdery material, whi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of easy pulverization, unstable mineral composition, coarse particles, poor stability and low activity of magnesium slag under the existing treatment methods, which make it difficult to effectively utilize metal magnesium slag. Provide a high-activity, low-expansion high-performance magnesium with simple method, low cost, finer particles of magnesium slag, loose structure, low pulverization rate, easy grinding, and more active components in minerals Preparation method of slag

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