A curing agent for controlling heavy metal pollution

Abstract

The invention relates to the technical field of curing agents, in particular to a curing agent for controlling heavy metal pollution, which consists of the following raw materials in mass percent: 5-60% silicate, 5-60% quartz powder, 1-5 % sodium lauryl sulfate, 1-10% carbon powder, 1-10% iron powder, 1-15% starch, 1-10% manganese oxide. The solidifying agent of the present invention can modify smelting waste slag, for example, form a glassy state with heavy metal oxides in dirty acid slag, aluminum slag, and manganese slag, and achieve performance characteristics such as easy melting and matrix modification, making dirty acid slag, aluminum slag, The co-fired product of aluminum slag, manganese slag and curing agent has an ideal microstructure, solidifies and stabilizes the heavy metal elements in the waste slag, can effectively reduce or prevent the leaching of heavy metal elements and the transmission with the outside world, and has a good stabilizing effect on heavy metals. It is conducive to the resource utilization of smelting waste residue, so as to achieve the purpose of energy saving, emission reduction and environmental protection.

Description

technical field [0001] The invention relates to the technical field of curing agents, in particular to a curing agent for controlling heavy metal pollution. Background technique [0002] At present, smelters produce a large amount of waste slag during the smelting process. These waste slags have basically no value for recycling or refining precious metals, and also contain toxic heavy metals such as copper, lead, zinc, cadmium, arsenic, and mercury. Polluted acid slag is a productive waste, which is a by-product of the resource recovery process of zinc hydrometallurgy. It contains mercury, arsenic, cadmium, lead and other heavy metal poisonous substances that are most harmful to humans and animals. These heavy metal toxic substances enter the atmosphere and water bodies After being exposed to various environments such as soil and soil, it can be absorbed by animals through various channels such as the respiratory tract, digestive tract and skin. When these heavy metals accum...

AI Technical Summary

Problems solved by technology

However, the waste slag from the smelter cannot be directly fired into ceramsite without modification due to its single elemental composition, and there is no possibility of recycling and extracting precious metals.