Concurrent high-sulfur bauxite desulfurization roasting process and device

A technology of high-sulfur bauxite and roasting process, which is applied to the preparation of aluminum compounds, alkali metal aluminates/aluminum oxide/aluminum hydroxide, inorganic chemistry, etc., to ensure desulfurization reaction temperature and reaction time, and ensure kinetic characteristics , the effect of reducing the likelihood

Pending Publication Date: 2020-05-19
贵州正道实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no effective industrial production technology for reducing the sulfur content in bauxite in China for high-sulfur bauxite.

Method used

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  • Concurrent high-sulfur bauxite desulfurization roasting process and device
  • Concurrent high-sulfur bauxite desulfurization roasting process and device

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Embodiment 1

[0036] Embodiment 1: as attached figure 1 As shown, a downstream high-sulfur bauxite desulfurization roasting device, including raw bauxite feeding system, Venturi feeding system, desulfurization roasting system, desulfurization roasting dust collection system, cyclone cooling system, cooling dust collection system, a primary fuel supply system and a secondary fuel supply system, the raw bauxite feeding system includes a raw meal feeding bin 1, a rotor weighing feeder 2, a belt feeder 3 and a screw feeder machine 4; the rotor weighing feeder 2 is set at the lower end of the raw material feeding bin 1, the belt feeder 3 is located below the rotor weighing feeder 2, and the belt feeder 3 is connected to the inlet of the screw feeder 4 The feed port, the feed port of the screw feeder 4 is connected to the feed port of the Venturi dryer 5.

[0037] The Venturi feeding system includes a Venturi drier 5 and a primary cyclone separator 6, the inlet of the Venturi drier 5 is connecte...

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Abstract

The invention discloses a concurrent high-sulfur bauxite desulfurization roasting process and device. The process comprises the steps of grinding, weighing and feeding, drying, primary suspension desulfurization roasting, secondary suspension desulfurization roasting, desulfurization roasting dust collection, cyclone cooling, cooling and dust removal and the like. According to the invention, a flue gas and material concurrent manner is adopted in the desulfurization roasting section, the contact time of the material and high-temperature flue gas in a proper reaction temperature interval rangeis prolonged, the dynamic characteristic of the high-sulfur bauxite desulfurization reaction is ensured, no return material is generated in the technological process, and the method has the characteristics of good desulfurization effect, low production cost, stable product quality and high production efficiency.

Description

technical field [0001] The invention relates to a high-sulfur bauxite desulfurization treatment process and device, in particular to a downstream high-sulfur bauxite desulfurization roasting process and device, belonging to the technical field of nonferrous metallurgy. Background technique [0002] Bauxite with a sulfur content greater than 0.7% is called high-sulfur bauxite. Sulfur will cause the following hazards to the production of alumina by the Bayer process: 1. If the sulfur content is too high, a part of the alkali will be consumed in the dissolution process, reducing the alumina produced by the Bayer process. 2. Sulfur dissolved in sodium aluminate solution in the form of sulfide ions, hydroxyl sulfide ions and complexes will accelerate the corrosion rate of equipment. Sodium thiosulfate oxidizes metallic iron, and the oxidation product reacts with sodium thiosulfate to form soluble sodium hydroxythiosulfate (Na 2 [FeS 2 (OH)]2H 2 O) The red mud separation and se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/06
CPCC01F7/0613
Inventor 赵骏罗守敏纪德鹏王嫚
Owner 贵州正道实业有限公司
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