Method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue

Abstract

The invention discloses a method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue, which is characterized in that washing gangue or / and brasses of a karst accumulated aluminium ore or other aluminium ores is or are used for preparing high-iron pyritic residue iron powder which reacts with sulfuric acid to generate aluminum sulfate and ferric sulfate water solutions, and then an alkalizer is added for polymerizing to produce the polymeric aluminum ferric sulfate. Meanwhile, the gangue has thinnest granularity, wherein the content of fine silt with the granularity of -10 micrometers accounts for 80 percent, and the fine silt is the optimal raw material for producing the polymeric aluminum ferric sulfate, and has the advantages of high reaction ratio and good product quality. The invention has the advantages of being capable of reasonably and effectively utilizing aluminium ore resources, effectively controlling the aluminium ore washing gangue from a pollution source, protecting the environment, realizing the harmony of human beings and the environment, lowering the production cost of the polymeric aluminum ferric sulfate and realizing high-efficiency recycling economy.

Description

technical field [0001] The invention belongs to the technical field of tailings treatment and water treatment chemicals, and relates to a method for preparing polyaluminium-ferric sulfate by washing tailings with aluminum ore. Background technique [0002] At present, my country is rich in aluminum ore resources. While obtaining high-quality metal aluminum, a large amount of waste slag and waste mud are produced, especially the tailings are difficult to settle naturally in a natural state, and it is extremely difficult to stockpile. As far as Pingguo Aluminum, one of the main aluminum production bases in my country, produces about 2 million tons of tailings every year, the Baise area where Pingguo Aluminum is located is dominated by karst landforms, and various karst structures are available in the mining area. Gully melting tanks are criss-crossed, and the discharged slime forms a slime reservoir, which has a great impact on the surrounding environment and has great potentia...

AI Technical Summary

Problems solved by technology

This patent has the following deficiencies: (1) Due to the different places of origin of pyrite, the contents of iron and aluminum in the slag are different, so that the contents of iron sulfate and aluminum sulfate in the final product polyaluminum ferric sulfate cannot be adjusted, and the product cannot be adapted to market needs (2) the waste residue is not broken and only utilizes the dilution heat release of sulfuric acid to maintain the reaction, and the reaction is not thorough; (3) the natural sedimentation of the flocculant is used for three times and the reactant cannot be fully extracted, the product yield is low, and the final flocculation sediment is not recovered. Secondary pollution caused by treatment

This preparation method uses wax oil catalytic waste catalyst as raw material, the source is greatly limited, and the waste material production product has high impurity content, and aluminum hydroxide is used as the polymerization agent at the same time, because the activity of aluminum hydroxide is low, so the polymerization degree of the obtained product is still less than 45%

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