Method for preparing sintered bricks from pressure filtration residues

Abstract

The invention discloses a method for preparing sintered bricks from pressure filtration residues. The method comprises the following steps of crushing the pressure filtration residues, mixing the crushed pressure filtration residues and barium carbonate, adding water for impregnation and stirring, regulating the pH value by using a ammonium bicarbonate aqueous solution, performing solid-liquid separation, crushing bauxite tailings, gangue or coal respectively, uniformly mixing the crushed bauxite tailings, gangue or coal and solid residues according to a ratio, placing the mixture in a closed environment for balancing, performing extrusion forming on the balanced mixture, feeding the mixture into a roasting kiln, and controlling the roasting temperature to obtain required pressure filtration residue sintered bricks. According to the method, the problems of multiple lime blowing phenomena, severe scumming, poor weather resistance and the like of bricks are radically solved; the using amounts of the pressure filtration residues and the bauxite tailings in the pressed sintered bricks are more than 80 percent and more than 15 percent respectively, and the addition of cement and the like is avoided, so that the pressure filtration residues are fully utilized; process waste gas and wastewater in a production process are recycled, so that the production cost is further lowered, and the environment is protected; the method is simple and low in cost, and has broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of sintered brick preparation, and in particular relates to a method for producing sintered bricks by utilizing manganese ore and manganese smelting solid slag to produce metallic manganese, manganese dioxide and manganese sulfate. Background technique [0002] The production of electrolytic manganese, manganese dioxide and manganese sulfate will produce a large amount of filter press residue. The traditional treatment method is to build a slag bank for stacking, which not only brings hidden dangers to environmental protection and safety, but also causes a waste of resources. Recently, many scientific research units have conducted a lot of research on the reuse of filter press residue, among which the use of filter press residue to process building bricks is an important direction, but the effect is not ideal. The specific performance is as follows: 1. The consumption of the filter only accounts for 30~60%,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art, to provide an industrialized method for preparing sintered bricks with filter press residue, and fundamentally solve the problem that the filter press residue produced during the production of electrolytic manganese, manganese dioxide and manganese sulfate cannot be effectively utilized. question

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