Reaction furnace for dealkalizing red mud by non-direct heating and synchronously drying red mud raw material

Abstract

The invention discloses a reaction furnace for dealkalizing red mud by non-direct heating and synchronously drying a red mud raw material. The reaction furnace comprises a furnace body and a furnace seat, wherein the interior of the furnace body is provided with a red mud dealkalization reaction system and a raw material drying system capable of utilizing residual heat for drying of the raw material; the raw material drying system is arranged at the outer side of the red mud dealkalization reaction system; the interior of the raw material drying system is provided with drying channels; drying feeding hoppers are arranged above the drying channels; drying discharge devices are arranged below the drying channels and communicate with the red mud dealkalization reaction system through feed channels; the interior of each drying discharge device is provided with a discharge roller and a drying discharge auger; and drying discharge augers are arranged below the discharge rollers. According to the invention, to-be-treated red mud is dried by utilizing the residual heat, so the raw material drying system and the red mud dealkalization reaction system are organically integrated; the residual heat of a reaction is completely utilized; drying of materials like the red mud is completed without addition of a new heat source; the effect of energy conservation is significant; and the cost of production and the investment of a production line are effectively reduced.

Description

technical field [0001] The invention relates to the fields of red mud treatment technology and the like, in particular to a reaction furnace for indirectly heating red mud to dealkalize and synchronously drying red mud raw materials. Background technique [0002] Red mud is a high-risk polluting waste that is discharged when the aluminum industry extracts alumina. Generally, for every ton of alumina produced, 1.0-2.0 tons of red mud is incidentally produced. As the fourth largest producer of alumina in the world, China discharges tens of millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized, and can only be stacked in a large area of ​​storage yard, which occupies a large amount of land and causes serious pollution to the environment. [0003] The mineral composition of red mud is complex, and various methods are used to analyze it, mainly including the following methods: polarizing microscope, scanning microscope, differ...

AI Technical Summary

Problems solved by technology

In the existing technology, the utilization of red mud mostly adopts treatment processes and equipment such as beating, adding various additives, and sintering, which cannot make perfect use of red mud, especially the separation and recycling of alkali in red mud

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