Method for manufacturing microlite from high-temperature ferronickel alloy waste slag

Abstract

The invention relates to a method for manufacturing microlite from high-temperature ferronickel alloy waste slag, belonging to the technical field of reutilization of alloy waste slag. The technical process mainly comprises the steps of preparation and preheating of an admixture, hot mix melting, water quenching and cooling, grinding, and crystallization. The method comprises the following steps: by using kaolin with the particle size of 0.5mm as kaolin, weighing an alloy waste slag solution and the admixture in a mass ratio of (85-90):(10-15), and heating the admixture to 1300-1400 DEG C; keeping the mix melting temperature at 1450-1500 DEG C for 30-45 minutes while stirring; cooling the molten slag by water quenching; and adding the water quenching slag into a ball mill, milling, filling the slag powder into a mold, sending into a crystallizing kiln or crystallizing tunnel, heating to 950-1000 DEG C, keeping the temperature to perform crystallizing treatment for 120-180 minutes, carrying out furnace cooling or slow cooling at the rate of 5-8 DEG C / minute, and finally, demolding to obtain the microlite finished product. By effectively utilizing the high-temperature ferronickel alloy waste slag for producing microlite, the method reduces the environmental pollution, conforms to the requirements for national clean production, and has the advantages of lower investment cost, reliable technology and obvious economic benefit of production.

Description

1. Technical field [0001] The invention relates to a method for using high-temperature nickel-iron alloy waste slag as a raw material to manufacture microcrystalline stone, and belongs to the technical field of ferroalloy waste slag reuse. 2. Background technology [0002] The smelting of ferronickel produces a large amount of metallurgical waste. Usually metallurgical slag is processed and utilized as the main raw material for cement or to manufacture other building materials, but nickel-iron alloy waste slag contains more SiO 2 , MgO, especially the high content of MgO, which does not meet the requirements of cement admixtures. At present, the existing nickel-iron alloy waste slag treatment methods are mainly dumping or burying, which not only occupies a large amount of land resources, but also pollutes the local environment. Unlike other metallurgical Compared with the treatment and utilization technology of waste slag, the treatment of nickel-iron alloy waste slag is mo...

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Problems solved by technology

Usually metallurgical slag is processed and utilized as the main raw material for cement or to manufacture other building materials, but nickel-iron alloy waste slag contains more SiO 2 , MgO, especially the high content of MgO, which does not meet the requirements of cement admixtures. At present, the existing nickel-iron alloy waste slag treatment methods are mainly dumping or burying, which not only occupies a large amount of land resources, but also pollutes the local environment. Unlike other metallurgical Compared with the treatment and utilization technology of waste slag, the treatment of nickel-iron alloy waste slag is difficult and the total amount is large, which is an important problem for nickel-iron alloy enterprises and local regions