Method for producing ganged brick by utilizing red mud and bauxite tailings

Abstract

The invention discloses a method for producing a ganged brick by utilizing red mud and bauxite tailings, relates to comprehensive resource utilization in the process of alumina production, and in particular relates to a method for producing the ganged brick by utilizing the red mud and bauxite tailings. The method is characterized in that in the production process, the red mud and bauxite tailings in the oxidation production process are used as raw materials, coal ash or waste glass is mixed, and then a building ganged brick is prepared by ageing, dehydration, molding, drying and firing processes. According to the invention, components in the red mud, such as base and iron, are utilized to regulate the firing temperature of a green body, thereby being contributed to generating of a liquid phase and causing a porous structure in the green body; a once firing process is adopted, which can recycle wastes and save a large amount of energy consumption, so that good effect and economic benefits are generated; after the raw materials are mixed, plasticity is good, initial strength is high, and a phenomenon that a dry green body is damaged does not occur; and in the method, used materials, such as red mud and bauxite tailings, are thin in particle size, thereby avoiding a large amount of ball milling operations and reducing production cost.

Description

technical field [0001] The invention discloses a method for producing clean-water bricks by using red mud and bauxite dressing tailings, which relates to comprehensive utilization of resources in the alumina production process, and specifically relates to a method for producing clean-water bricks from red mud and bauxite dressing tailings. Background technique [0002] Red mud is a very fine-grained strong alkaline solid waste produced during the production of alumina from bauxite. China is a big producer of alumina, and it is estimated that by 2015, the cumulative stockpiles of red mud will reach 350 million tons. Red mud stockpiles have brought huge economic burdens to enterprises, and at the same time caused serious environmental safety hazards. Up to now, an effective red mud utilization method has not been found at home and abroad. The comprehensive utilization rate of red mud in my country is only 4%, and the main treatment method is damming and stockpiling. [0003...

AI Technical Summary

Problems solved by technology

At present, mineral processing tailings are mostly stored in tailings dams or red mud pools by natural accumulation, which takes up a lot of land