A method and application of combined treatment of copper slag and magnesium slag

Abstract

The invention relates to a method and application for jointly treating copper slag and magnesium slag, belonging to the technical field of metallurgy. The treatment method of the present invention is specifically as follows: (1) industrial copper slag and self-powdering magnesium slag are mixed according to the mass ratio of (50-90): 100 to obtain mixed slag, then finely ground to below 200 mesh, mixed and pressed into a cake shape to obtain a cake-shaped mixed slag; (2) put the cake-shaped mixed slag in a muffle furnace, raise the temperature to 1100-1300°C in an air atmosphere, and then roast at a constant temperature for 1-3 hours. After the roasting is completed, take out the sample, Use compressed air to cool, then finely grind and magnetically separate to obtain iron-rich concentrate and silicate-rich tailings. The magnetic separation product of the present invention can be used for thermal insulation refractory materials and building materials respectively. After being modified by the invention, the yield of magnetic separation of mixed slag is increased from 38.71% to 69%; the recovery rate is increased from 52.07% to 81.14%, and the yield and recovery rate of magnetic separation concentrate of mixed slag are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method and application for jointly treating copper slag and magnesium slag. Background technique [0002] With the rapid development of our country's economy, the demand for mineral resources is also increasing. The development and utilization of secondary resources has become an important way for the metallurgical industry to achieve sustainable development. Copper slag contains a large number of available resources, the main minerals of which are iron silicate and magnetic iron oxide, fayalite (2FeO SiO 2 ), magnetite (Fe 3 o 4 ) and some amorphous glass composed of gangue. The grade of iron in copper slag is generally more than 40%, much higher than the average industrial grade of 29.1% in iron ore, but the utilization rate of iron in copper slag is less than 1%. Therefore, copper slag has important recycling value as a potential resource of iron. [0003...

AI Technical Summary

Problems solved by technology

The grade of iron in copper slag generally exceeds 40%, much higher than the average industrial grade of 29.1% in iron ore, but the utilization rate of iron in copper slag is less than 1%.

my country's magnesium industry generally has shortcomings such as small production scale, high pollution, high energy consumption, low level of technical equipment, and low technological innovation capability. How to make full use of magnesium slag has also become a major problem restricting the development of my country's magnesium industry.

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