Fayalite material with copper slag as main material and preparation method thereof

Abstract

The invention relates to a fayalite material with copper slag as a main material and a preparation method thereof. The preparation method comprises the following steps: immersing copper slag particles in boiling water for 1-3 h, filtering, drying, and screening; placing the screened copper slag particles into a muffle furnace, and calcining at 700-850 DEG C for 1-3 h to obtain calcined copper slag particles; adding a hydrochloric acid solution to the calcined copper slag particles, stirring, washing and carrying out suction filtration to prepare a precursor copper slag particles; wet-grinding the precursor copper slag particles until the granularity is less than or equal to 60 microns so as to prepare wet-ground copper slag powder; adding the wet-ground copper slag powder and powdered coke into a pug mill, carrying out vacuum extrusion moulding, storing the product for 24-36 h; placing the product into an electric resistance furnace and heating to 1100-1150 DEG C, carrying out thermal insulation for 1-3 h, and cooling with the furnace so as to prepare the fayalite material with copper slag as the main material. The method has advantages of simple process, low energy consumption, low production cost and no special requirement on equipment. The prepared product has good sintering performance and high fayalite conversion rate.

Description

technical field [0001] The invention belongs to the technical field of fayalite materials. In particular, it relates to a fayalite material with copper slag as the main material and a preparation method thereof. Background technique [0002] Copper slag is the slag produced in the process of copper smelting. The main chemical composition of copper slag is SiO 2 and Fe 2 o 3 , accompanied by a small amount of CaO, MgO, Al 2 o 3 and impurities such as ZnO. Copper slag has a large output and is difficult to degrade, which not only pollutes the environment, but also wastes a lot of resources. [0003] At present, fayalite materials mostly contain Fe 2 o 3 and containing SiO 2 The minerals are used as raw materials and prepared by solid-state sintering or electrofusion. The main defects of using the solid phase sintering method to prepare fayalite materials are as follows: first, the conversion rate of fayalite materials is reduced due to the presence of impurities in n...

AI Technical Summary

Problems solved by technology

The main defects of using the solid phase sintering method to prepare fayalite materials are as follows: first, the conversion rate of fayalite materials is reduced due to the presence of impurities in natural mineral raw materials; The induced volume effect affects the sintering properties of fayalite materials

However, the preparation of fayalite material by electrofusion method requires large energy consumption and complicated process, which increases the preparation cost of fayalite material.