Preparation method of beneficiation wastewater metal trapping agent

Abstract

The invention discloses a preparation method of a beneficiation wastewater metal trapping agent. The method includes the following steps that 1, monochloroacetic acid of certain weight is weighed at the room temperature and dissolved in water, and an aqueous solution with the weight concentration being 20% is prepared; 2, thiourea of certain weight is weighed and dissolved in water, and an aqueous solution with the weight concentration being 10% is prepared; 3, the thiourea aqueous solution is added to the monochloroacetic acid aqueous solution according to the weight ratio of monochloroacetic acid to thiourea being 1:1.5, the mixture is heated to 90 DEG C, a reaction is conducted for 60 minutes, then the mixture stands still for 24 hours, solid-liquid separation is conducted, and white powder crystals are obtained; 4, the white powder crystals and sodium hydroxide are prepared into an aqueous solution with the concentration being 5% according to the weight ratio of 5:1 for use. The trapping agent prepared through the method can be directly used for treatment of acidic heavy metal wastewater, has the advantages of being high in heavy metal removal rate, capable of removing multiple metal ions at the same time and good in sediment stability and can achieve efficient treatment of copper, lead, zinc, cadmium and mercury in wastewater.

Description

technical field

[0001] The invention belongs to the technical field of chemical mineral processing, and in particular relates to a preparation method of a heavy metal collector for mineral processing wastewater, which is suitable for the treatment of mineral processing tailings wastewater containing heavy metals such as copper, lead, zinc, cadmium and mercury. Background technique

[0002] Metal mines are not only places where resources are concentrated, but also sources of pollution to the ecological environment. With the country's increasing emphasis on mine environmental protection, in recent years, the chemical industry has promulgated new metal beneficiation wastewater discharge standards. The main source of heavy metal pollution in mine tailings wastewater is the heavy metal-containing minerals in the tailings. Non-ferrous metal ores contain heavy metals. After crushing, grinding and sorting operations, the particle size of the ore is relatively fine, and the surface ...