Preparation method of active manganese residue micro powder

Abstract

The invention discloses a preparation method of active manganese residue micro powder. The preparation method comprises the following steps: (1) preparing materials in percentage by weight: 70%-90% of manganese residues, 4%-16% of red mud and 5%-20% of cement clinker, wherein the red mud refers to Bayer-process red mud or sintering-process red mud with over 1% (in percent by weight) of K2O and Na2O in total; (2) respectively drying the red mud and the manganese residues in the step (1) until moisture content is smaller than 1%; (3) respectively grinding the cement clinker, the red mud in the step (2) and the manganese residues in a ball mill until specific surface area is 380 m<2>/kg-450m<2>/kg for later use; and (4), preparing the micro powder in the step (3) according to the proportion in the step (1), and uniformly mixing to obtain the active manganese residue micro powder. Based on a current situation that activity of manganese residues is low, and a comprehensive utilization problem of the red mud is to be solved, active indexes of the manganese residue micro powder are improved by adding a certain amount of red mud and cement clinker to stimulate activity of the manganese residue micro powder; and meanwhile, a certain amount of red mud is consumed, so that pollution of red mud on environment is reduced, and resource utilization of waste residues is realized.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a preparation method of active manganese slag micropowder. Background technique [0002] my country has relatively rich manganese ore resources. By the end of 2010, the proven reserves of manganese ore in my country were 892 million tons, making it one of the countries with abundant manganese ore resources in the world. Guangxi has found 313 million tons of manganese ore reserves, ranking first in the country. According to statistics, my country’s national output of ferromanganese alloy exceeded 6 million tons in 2011. According to the calculation that 1 ton of ferromanganese alloy produces 2 to 2.5 tons of manganese slag, the discharge of ferromanganese alloy slag in 2011 alone exceeded 10 million tons. The stacking of a large amount of manganese slag not only occupies a large amount of arable land, but also elements such as Cr and Mn will pollute surface water, grou...

AI Technical Summary

Problems solved by technology

According to statistics, in 2010, the annual discharge of red mud in my country has exceeded 30 million tons. A large amount of red