Method for harmlessly preparing sulfate binding material through electrolysis zinc acid leached residues

Abstract

A method for harmlessly preparing sulfate binding material through electrolysis zinc acid leached residues includes the following steps of firstly, preparing electrolysis zinc acid leached residues, heavy metal ion curing stabilizer and activating agent; secondly, conducting roasting for 15-60 min in the oxidizing atmosphere with temperature of 950 DEG C to 1300 DEG C and excess air coefficient of 1.1-1.8 to prepare cooked residues; thirdly, directly grinding the cooked residues into powder with grain size of 80 microns and screen residue of 12wt% or lower, or grinding 60-99wt% of cooked residues and 1-40wt% of auxiliary materials into powder with grain size of 80 microns and screen residues of 12wt% or lower, and then obtaining the sulfate binding material. The method is simple, practical and free of secondary pollution; water-resistant and salt-corrosion-resistant binding material and building material products are effectively produced through zinc acid leached residues, high-quality materials can be provided for construction work, and the consumption of environment resources and energy and the pollution to the environment in the traditional binding material and building material product production process can be greatly reduced.

Description

technical field [0001] The invention relates to the field of environmental protection and waste utilization, in particular to a method for preparing a novel sulfate gelling material by harmless treatment of heavy metals in acid leaching waste slag in a wet zinc smelting process using zinc oxide concentrate as a raw material. Background technique [0002] Electrolytic zinc is an indispensable metal material in modern economic construction. However, the pollution of environmental water and soil caused by the waste residue produced in the production process of electrolytic zinc—zinc acid leaching residue has been shocking. It has already triggered a large number of mass incidents and caused The government attaches great importance to it, and the effective treatment of zinc slag has become a major problem in many local environments. It has also been included in the national 863 key project research and has been accepted. However, the treatment of electrolytic zinc acid leaching s...

AI Technical Summary

Problems solved by technology

This kind of zincic acid leaching slag has no extraction value of zinc, lead and rare precious metals, and contains a small amount of various heavy metal ions and is classified as hazardous solid waste. Yes, even the rigorous and meticulous safe landfill treatment has produced long-term heavy metal pollution in groundwater and soil that cannot be ignored. There is an urgent need for a solidified, passivated, stable heavy metal, and effective resource utilization. The new method of the main composition mineral calcium sulfate, jarosite or / and zinc ferrite and other mineral raw materials