Process for red mud multi-component separation and tailings hardening and tempering utilization

Abstract

The invention relates to the field of comprehensive utilization of solid waste resources, and discloses a process for red mud multi-component separation and tailings hardening and tempering utilization. The process comprises the following steps of mixing the red mud and a tempering modified slagging agent according to a certain proportion; rolling and molding the mixed material and performing drying treatment so as to obtain dried pellets; putting the dried pellets and coke into a multifunctional smelting furnace for reduction, separating alkali metal, heavy metal and the like through gas phase, and separating iron liquid through liquid phase; and preparing mineral wool and rock wool from residual high-temperature molten slag in a furnace through a centrifugal or blowing method, or preparing microcrystalline glass through a template crystallization method. According to the process for recycling the red mud, the multi-component separation and full-component utilization of the solid waste red mud are realized, the current situation that the red mud is insufficient in utilization which leads to environment pollution can be solved, thus meeting the national waste recycling environmental protection policy; and meanwhile, the high value-added alkali metal and heavy metal components, iron liquid and mineral wool / rock wool / microcrystalline glass can be obtained after treatment, and accordingly significant environmental benefits and economic benefits are obtained.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of solid waste resources, in particular to a process for separation of multiple components of red mud and conditioning and utilization of tailings. Background technique [0002] Red mud is the solid waste discharged from the alumina industry during the aluminum production process. It is named for its red and brown colors. According to the current technical level of the alumina industry, about 1 to 1.8 tons of red mud will be discharged for every 1 ton of alumina produced. And my country is a big country of alumina production. According to the statistical results of "China's Comprehensive Utilization of Resources Annual Report" (2014), the annual production of red mud in my country is 73 million tons, the utilization rate is only about 4%, and the accumulated stockpiles have reached 300 million. Tons. A large amount of stockpiled red mud not only occupies scarce land resources, but also ca...

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Problems solved by technology

[0007] In view of the above-mentioned technical defects and application requirements, this application proposes a process of red mud multi-component separation and tailings conditioning and tempering to solve the existing problems of red mud treatment process complexity, high recovery cost and secondary pollution

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