A kind of preparation method of aluminum ore red mud sedimentation flocculant

Abstract

The invention discloses a preparation method of an aluminum ore red mud sedimentation flocculating agent. The method comprises the following steps of material preparation, liquid preparation, mixed stirring and material discharging. Monomer copolymer emulsion and modified emulsion are mixed and stirred. Compared with a conventional oil phase and brine slow dripping method, the method provided by the invention has the advantages that the reaction time is greatly reduced; the production efficiency is improved; in addition, after the mixing, the dissolution is uniform; a final product does not contain organic solvents; meanwhile, beta-monomethyl Itaconate is used, so that the chain transfer effect of the itaconic acid monomers during the polymerization can be effectively prevented; the effective carboxyl functional groups are introduced for the long chains, so that the aluminum ore red mud entanglement is facilitated, and the bridging effect is achieved for achieving the separation goal; the red mud sedimentation speed is accelerated; the safety is higher on environment and operators; the clarity degree of the supernate is obviously improved; the waste is reduced; the sedimentation separation effect of the product in the aluminum ore red mud application is very obvious.

Description

technical field [0001] The invention relates to the technical field of aluminum ore red mud settlement, in particular to a preparation method of an aluminum ore red mud sedimentation flocculant. Background technique [0002] The alumina industry is the basic raw material industry of the national economy and plays an important role in the development of China's industrial economy. my country's alumina output ranks first in the world. At present, the alumina production method adopts the alkali method, and the red mud slurry is a suspension composed of red mud and sodium aluminate solution after the bauxite is dissolved by alkali. After the slurry is diluted, the red mud is separated from the sodium aluminate solution by sedimentation or filtration, and then alumina is produced from the sodium aluminate solution. The sedimentation and separation of red mud is one of the key links affecting the production capacity, quality and benefit of alumina. In order to strengthen the sed...

AI Technical Summary

Problems solved by technology

In recent years, large foreign companies such as Nalco, Cytec and Essen in the United States have done a lot of work on the characteristics of Chinese bauxite and developed some new flocculants, but foreign manufacturers strictly keep their active ingredients and preparation technology secret. And the price is expensive. Therefore, the development of new high-efficiency flocculants with independent intellectual property rights and suitable for the sedimentation and separation of bauxite red mud in my country is of great significance to the development of my country's alumina industry. At present, the flocculants used in red mud separation are mainly anion The hydrolyzate of polyacrylate or polyacrylamide, its dosage forms are mainly hydrosol, dry powder and low concentration inverse emulsion. , the flocculation effect is unstable, the synthesis technology is single, and the low-concentration inverse emulsion has the disadvantages of low molecular weight and poor stability, and the use effect is not ideal