Method for producing rare-earth poly-ferric aluminum silicate sulfate from rare earth-containing sludge and iron-containing dust sludge

A technology of rare earth sulfate and iron dust sludge, which is applied in the direction of flocculation/precipitation water/sewage treatment, etc., can solve the problems of expensive chemical raw materials, low effective concentration, poor stability, etc., to reduce production costs and sewage treatment costs, Excellent performance and good product stability

Inactive Publication Date: 2009-07-15
杨祺
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Problems solved by technology

This production method requires expensive chemical raw materials, and the cost is relatively high.
And ZL200510094967.1 "Method for preparing polysilicon aluminum ferric sulfate with metallurgical slag", although found a way to reduce the production cost of polysilicon aluminum ferric sulfate, but the effective concentration is low and the stability is poor

Method used

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  • Method for producing rare-earth poly-ferric aluminum silicate sulfate from rare earth-containing sludge and iron-containing dust sludge
  • Method for producing rare-earth poly-ferric aluminum silicate sulfate from rare earth-containing sludge and iron-containing dust sludge

Examples

Experimental program
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Effect test

example 1

[0022] (1). Weigh 2 kg of rare earth-containing sludge and 3.6 kg of steelmaking dust and mix them thoroughly, and put the rare earth-containing sludge and steelmaking dust into an acid-resistant reaction kettle at a weight percentage of 1:1.8.

[0023] (2). 52L mass percent concentration 10% H2SO4 is slowly poured into the reactor to carry out acid hydrolysis to rare earth sludge and steelmaking dust sludge, containing rare earth sludge, steelmaking dust sludge: 10%H2SO4 by weight 1 : 10 and fully stirred for 1 hour, the reaction system was cooled to room temperature, and the acidolysis reaction was completed.

[0024] (3). Filter the reaction product to remove the precipitate (mainly gypsum and acid insoluble matter), and the filtrate (mainly a mixed solution of ferrous salt, ferric salt, aluminum salt, lanthanum salt, cerium salt and hydrated silicic acid) Use 27.5% H2O2 to make all Fe2+ in the solution be oxidized to Fe3+, and the oxidation end point of the process of oxid...

example 2

[0026] (1). Weigh 2 kg of rare earth-containing sludge and 4 kg of steelmaking dust and mix them thoroughly, and put the rare earth-containing sludge and steelmaking dust into the acid-resistant reaction kettle at a weight percentage of 1:2.

[0027] (2). 99L mass percent concentration 5% H2SO4 is slowly poured into the reactor to carry out acid hydrolysis to rare earth sludge and steelmaking dust sludge, and rare earth sludge, steelmaking dust sludge: 5% H2SO4 by weight 1 : 17 was fully stirred for 1 hour, and the reaction system was cooled to room temperature, and the acidolysis reaction was completed.

[0028] (3). Filter the reaction product to remove the precipitate (mainly gypsum and acid insoluble matter), and the filtrate (mainly a mixed solution of ferrous salt, ferric salt, aluminum salt, lanthanum salt, cerium salt and hydrated silicic acid) Use 27.5% H2O2 to make all Fe2+ in the solution be oxidized to Fe3+, and the oxidation end point of the process of oxidizing F...

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Abstract

The invention belongs to the technical field of preparing macromolecule flocculating agent for sewage processing, and in particular relates to a method of producing poly-silicate rare-earth aluminum ferric sulfate by using mud containing rare earth and ferric dust, which comprises the steps of material mixing, acid hydrolysis and oxidization, hydrolysis and polymerization. The invention provides a novel technology of using main raw materials, such as sewage and mud containing rare earth and generated in pertrification catalyst production enterprises and mud containing ferric dust generated in metallurgy steel-smelting enterprises for preparing macromolecule flocculating agent. The invention simplifies the technical process for producing poly-silicate rare-earth aluminum ferric sulfate, shortens the production time, has good product stability and performance, provides a new way for utilizing the mud containing rare earth and ferric dust, increases resource integrated utilization rate, lowers the production cost of the poly-silicate rare-earth aluminum ferric sulfate flocculating agent and the cost for sewage processing, and has high economic benefit, environmental protection benefit and social benefit.

Description

1. Technical field: [0001] The invention belongs to the technical field of preparing polymer flocculants for sewage treatment, and in particular relates to a method for producing rare earth aluminum iron polysilicon sulfate by using rare earth-containing sludge and iron-containing dust sludge. 2. Background technology: [0002] The existing raw materials for producing polysilicon aluminum ferric sulfate include sodium silicate, ferric sulfate, and aluminum sulfate. The production method is to acidify sodium silicate to prepare polysilicic acid, and then introduce iron and aluminum ions to polymerize. This production method needs expensive chemical raw materials, and the cost is relatively high. And ZL200510094967.1 "Method for preparing polysilicon aluminum ferric sulfate with metallurgical slag", although found a way to reduce the production cost of polysilicon aluminum ferric sulfate, but the effective concentration is low and the stability is poor. 3. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 杨祺杨忠刚
Owner 杨祺
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