Preparation method of high-performance magnesium slag

A high-performance, magnesium slag technology, applied in the field of high-performance magnesium slag, can solve the problems of difficult utilization of metal magnesium slag, unstable mineral composition, poor stability, etc., and achieve the effects of easy to master, low price and simple operation.

Active Publication Date: 2015-02-25
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Preparation method of high-performance magnesium slag
  • Preparation method of high-performance magnesium slag
  • Preparation method of high-performance magnesium slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing high-performance magnesium slag is prepared by using dilute acid solution and high-temperature metal magnesium slag just out of the tank produced in the process of producing metal magnesium by the Pidgeon method as raw materials, specifically: taking the high-temperature metal just out of the tank Magnesium slag is sprayed with dilute acid solution for rapid cooling, and after the spray treatment is completed, it is dried naturally, and finally the high-performance magnesium slag is obtained; wherein, the dilute acid solution is prepared by diluting industrial waste dilute sulfuric acid The resulting acidic aqueous solution, the acid concentration is determined by the H in the solution + Calculated as 0.02mol / L; when spraying, spray 0.35m per ton of high-temperature magnesium slag 3 dilute acid solution.

[0025] The mineral composition and morphology of the obtained high-performance magnesium slag were characterized by XRD and SEM.

[0026] fi...

Embodiment 2

[0032] A method for preparing high-performance magnesium slag is prepared by using dilute acid solution and high-temperature metal magnesium slag just out of the tank produced in the process of producing metal magnesium by the Pidgeon method as raw materials, specifically: taking the high-temperature metal just out of the tank Magnesium slag is sprayed with dilute acid solution for rapid cooling, and then dried after the spray treatment is completed, and finally the high-performance magnesium slag is obtained; wherein, the dilute acid solution is prepared by diluting industrial waste dilute sulfuric acid The resulting acidic aqueous solution, the acid concentration is determined by the H in the solution + Calculated as 0.05mol / L; when spraying, spray 0.1m per ton of high-temperature magnesium slag 3 dilute acid solution.

Embodiment 3

[0034]A method for preparing high-performance magnesium slag is prepared by using dilute acid solution and high-temperature metal magnesium slag just out of the tank produced in the process of producing metal magnesium by the Pidgeon method as raw materials, specifically: taking the high-temperature metal just out of the tank Magnesium slag is sprayed with dilute acid solution for rapid cooling, and after the spray treatment is completed, it is dried naturally, and finally the high-performance magnesium slag is obtained; wherein, the dilute acid solution is prepared by diluting industrial waste dilute sulfuric acid The resulting acidic aqueous solution, the acid concentration is determined by the H in the solution + Calculated as 0.01mol / L; when spraying, spray 0.5m per ton of high-temperature metal magnesium slag 3 dilute acid solution.

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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...

Claims

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Application Information

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IPC IPC(8): C04B5/00
Inventor 韩涛靳秀芝王慧奇杨学腾杨芳
Owner ZHONGBEI UNIV
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