Method for preparing engineering aggregate by using slag

Abstract

The invention relates to a method for preparing engineering aggregate by using slag. Equipment for auxiliary preparation of engineering aggregate is utilized. The equipment for auxiliary preparation of the engineering aggregate comprises a bottom plate, a crushing device, a screening device and a collecting device. According to the method for preparing the engineering aggregate by using the smelting slag, the difficult problems that existing equipment for preparing the engineering aggregate cannot crush slag generated by metal smelting into particles of different sizes, the slag is easily crushed into powder during crushing, the recycling rate of the slag is affected, the prepared engineering aggregate is lower in strength, the crushed slag particles cannot be screened and collected, the prepared engineering aggregate raw materials are mixed due to the incapability of classifying, screening and collecting the particles with different sizes, the respective uses of the particles with different sizes cannot be provided, the insufficient aggregate strength and the influence on the engineering quality can be caused by using the small particles as the main raw material, the material waste can be caused by using the larger particles as the auxiliary material, and the best use of materials cannot be realized are solved.

Description

technical field [0001] The invention relates to the technical field of engineering aggregates, in particular to a method for preparing engineering aggregates by using smelting slag. Background technique [0002] In recent years, with the rapid development of industries such as iron and steel, ferroalloy and non-ferrous heavy metals, slag is one of the important products of smelting and refining processes. Mainly oxides (silicon dioxide, alumina, calcium oxide, magnesium oxide), often contain sulfide and entrain a small amount of metal. And the amount of waste slag produced in the smelting process is very large. For example, about 0.3 to 1 ton of slag is produced in the production of 1 ton of pig iron, and about 5 to 6 tons of smelting slag are produced in the production of ton of anode copper from copper concentrate. Therefore, a large amount of smelting slag can only be disposed of through landfill, which has a low comprehensive utilization rate and pollutes the environmen...

AI Technical Summary

Problems solved by technology

[0005] The invention can solve the problem that the existing equipment for preparing engineering aggregates cannot break the slag produced by metal smelting into particles of different sizes, and the slag is easily crushed into powder during crushing, which affects the recycling rate of the slag, and the strength of the prepared engineering aggregate is relatively low. It can also solve the problem that the existing equipment for preparing engineering aggregates cannot sieve and collect the broken particles of slag, and cannot classify, sieve and collect particles of different sizes, which leads to the mixing of the prepared engineering aggregate raw materials. The respective uses of particles of various sizes and different sizes cannot be used. Using smaller particles as the main raw material will lead to insufficient aggregate strength and affect the quality of the project. Using large particles as auxiliary materials will cause waste of materials and cannot make the best use of everything. problem

Images