Bauxite separation flocculant and preparation method thereof

Abstract

The invention discloses a bauxite separation flocculant and a preparation method of the bauxite separation flocculant and relates to a separation process suitable for aluminosilicate minerals. The bauxite separation flocculant is characterized by being a comb-type quadripolymer, and the bauxite separation flocculant is formed by polymerizing four monomers of acrylamide, sodium acrylate, acrylic hydroximic acid and allyl sulfoacid. The acrylamide, the sodium acrylate, the acrylic hydroximic acid and the allyl sulfoacid are polymerized with the existence of a catalyst, namely NdCl3-ProH, and are synthesized to be the quadripolymer provided with a comb-type structure. By adjusting the ratio of the materials and technological parameters, the molecular weight, the hydrolyzing degree and the molecular structure of the flocculant are changed, so that the requirements of different types of minerals are met. According to the bauxite separation flocculant, the defects of an existing flocculant are overcome, and the vacancy of a special flocculant for bauxite separation is made up for. The bauxite separation flocculant has the advantages of being high in sedimentation velocity, high in ability to capture fine particles, low in viscosity, low in usage quantity and the like. Products which are separated and processed through the method are clear in backwater and can be directly reused. Sediment underflow is high in solid content and low in viscosity and improves the working efficiency of conveying and pressure filtration.

Description

technical field [0001] A bauxite beneficiation flocculant and a preparation method thereof relate to a flocculant suitable for solid-liquid separation in the beneficiation process of aluminosilicate minerals and a preparation method thereof. Background technique [0002] my country is rich in bauxite resources, and the proven reserves are about 3.1 billion tons, but most of them belong to the diaspore type bauxite with high sulfur, high iron, high silicon, and low aluminum-silicon ratio. The competitiveness of the industry must be through economical and effective beneficiation and desiliconization to provide ore concentrates with a high aluminum-silicon ratio for the Bayer process, so as to realize the production of alumina by "mineral beneficiation-Bayer process". [0003] At present, in order to meet the development needs of China's alumina industry, rationally utilize low- and medium-grade bauxite, and extend the service life of bauxite resources, alumina production enterp...

AI Technical Summary

Problems solved by technology

For beneficiation products that are mostly at room temperature, slightly alkaline, with high mineral surface activity and fine particles, the use of alumina conventional flocculants has a poor effect on the flocculants of beneficiation products, resulting in poor sedimentation and flocculation effects, and overflow backwater floats The content is high; the dosage of chemicals increases, and the cost of settlement increases; the viscosity of the sedimentation bottom flow is high, and the water content is high, which leads to difficulties in pressing and filtering mineral processing products.