Method for preparing non-steaming and non-burning manganese slag bricks by using manganese ore acid leaching waste residue

Abstract

The invention discloses a method for preparing non-autoclave non-fired manganese slag bricks from manganese ore acid-soaked waste residues. The method comprises the following steps of 1, preprocessing, wherein large manganese ore acid-soaked waste residues are aired, broken, dried, smashed and screened; 2, mixing, wherein 55-80 parts of the processed manganese ore acid-soaked waste residue powder, 20-36 parts of cement, 6-8 parts of slaked lime and 0-18 parts of coal ash are weighed by weight and uniformly mixed, the water-solid ratio is 0.15-0.20, water is added into the mixture in an equivalent and repeated mode, and a half-dry material is formed by blending; 3, the half-dry material is pressed and molded at the certain pressure, maintenance is performed for 28 d or more, and briquettes with the compressive strength being 25-40 MPa can be manufactured. According to the method, the manganese ore acid-soaked waste residue utilization rate is high, no autoclaving or firing is needed, and the obtained bricks have the good mechanical property.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of industrial waste residues, in particular to a method for preparing non-steaming and non-burning manganese slag bricks by using manganese ore acid leaching waste residues. Background technique [0002] my country has abundant reserves of manganese resources, which are mainly concentrated in southern regions such as Guangxi and Guizhou. Among them, the output of manganese products in Guangxi ranks first in the country. The rapid development of manganese products has also brought a series of problems to the environment, mainly manifested in the increasingly serious discharge of solid waste such as manganese ore acid leaching residue. According to the statistics and reports of relevant enterprises, about 8 to 9 tons of waste residue are discharged from the production of 1 ton of electrolytic manganese metal, about 5 to 6 tons of waste residue are discharged from the production of 1 ton of e...

AI Technical Summary

Problems solved by technology

From the perspective of the industrial chain, the large stockpiling of manganese ore leaching slag is not conducive to the development of my country's manganese ore processing enterprises

Due to the characteristics of manganese ore leaching slag, such as high viscosity, high water content, no pozzolanic activity and high sulfate content, it is difficult to effectively utilize resources

From the analysis of existing data, the research on manganese ore leaching residue in my country is still in its infancy.

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