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Red mud reduction device and red mud reduction method using same

A technology of red mud and reactor, which is applied in the direction of feeding devices, chemical instruments and methods, gas dust removal, etc., can solve the problems of high economic cost, low utilization rate of red mud, low processing efficiency, etc., and achieve high yield, Effect of improving reduction efficiency and reducing energy consumption

Inactive Publication Date: 2022-01-11
庞瑞朋 +1
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the utilization rate of red mud is low, the treatment efficiency is not high or the economic cost is too high and it is difficult to put into industrialization. The present invention reduces the Fe in red mud 2 o 3 , a large amount of Fe was obtained by magnetic separation 3 o 4 , as a raw material for the steel industry

Method used

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  • Red mud reduction device and red mud reduction method using same

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Embodiment 1

[0039] In this embodiment, a device for reducing red mud is used to reduce red mud, which is carried out according to the following steps:

[0040] Step 1, put coal into the coal gasifier 5 through the feed port 2, and inject the mixture of air and steam into the coal gasifier 5 for combustion, and the unburned slag is discharged from the slag outlet 1; The coal gas generated by combustion is cooled down to below 150°C through the gas-gas heat exchanger 3 and the gas-water heat exchanger 4 in turn, and enters the dust removal system-6 from the gas outlet of the coal gasifier 5 to purify the gas;

[0041] Step 2: The gas after dedusting by the dust removal system 6 is divided into two routes by the blower 17 for distribution, and the gas is raised to 600°C through the gas-gas heat exchanger 3 on one route, and then introduced into the reduction reaction via the blower 1 7 The gas uniform distributor 11 in the kettle 10; the other way is transported to the reduction reactor 10, an...

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Abstract

A red mud reduction device and a red mud reduction method using the same relate to the field of chemical engineering. The invention aims to solve the problem that red mud is difficult to be put into industrialization due to low utilization rate, low treatment efficiency or too high economic cost at present. Fe2O3 in the red mud is reduced, and a large amount of Fe3O4 is obtained through magnetic separation and is used as a raw material for production in the iron and steel industry. Meanwhile, waste heat in the treatment process is recycled to produce steam, and large economic benefits are generated. According to the red mud reduction technology using the red mud reduction device, red mud can enter a reaction kettle without complex treatment, the equipment investment is saved, and the production efficiency is guaranteed. The device and the method are applied to the field of red mud treatment.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a device for reducing red mud and a method for reducing red mud. Background technique [0002] Red mud is a reddish-brown powder mud-like solid waste. With the rapid development of the global alumina industry, the discharge of red mud has also increased rapidly. A large amount of red mud is stored in the open air, and its main pollutants have exceeded the emission standards stipulated by the Chinese state ("Standards for the Control of Pollution by Solid Waste in the Nonferrous Metal Industry" GB5058-85), causing serious waste of resources and environmental pollution. At present, the comprehensive utilization of red mud has attracted great attention at home and abroad. The research on the application of red mud includes: using red mud as a filler for rubber and plastics; using red mud as a paving material; preparing unburned red mud fly ash bricks; Alkali-making slag-red mud cem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/48C10J3/52C10J3/84C10K1/02B01J19/00B01J4/00
CPCC10J3/48C10J3/52C10J3/84C10K1/02B01J19/0053B01J19/0013B01J4/002Y02P20/129
Inventor 庞瑞朋翟冻冻
Owner 庞瑞朋
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