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Method for producing water treatment agent polyaluminium chloride from industrial waste residues

A technology of polyaluminum ferric chloride and water treatment agent, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of small adjustable range of aluminum and iron, expensive raw materials, single raw material varieties, etc., and achieve the effect of water purification Good, wide application range and low production cost

Active Publication Date: 2009-06-03
常熟紫金知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcoming of background technology, provide a kind of method that utilizes industrial waste residue to produce water treatment agent PAC limited, the content of aluminum and iron in the product is smaller than the adjustable range; the present invention has a wide range of raw materials, simple process, and low production cost; and the product quality is stable, the ratio of aluminum and iron in the product can be adjusted freely, and the application range is wide. Good water purification effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, the mixture of bauxite, kaolin and coal gangue is calcined at 700°C to 900°C for 2 to 4 hours, crushed and sieved (80 mesh to 120 mesh). Then, add 100kg of the separated undersize to the reaction kettle, and at the same time, add 150kg of mixed waste acid solution and heat it to 100°C-150°C under stirring, and fully react for 2-5 hours. Then, add 250kg of the mixture of pyrite slag, fly ash and aluminum ash into the reaction kettle, inject 350kg of mixed waste acid solution and 50kg of oxidant sodium hypochlorite at the same time, heat to 80°C ~ 130°C, oxidation reaction 2 ~ After 4 hours, add 100kg of a saturated solution of alkalinity regulator calcium oxide, fully stir in the reactor, heat to 70°C-100°C, further polymerize for 1-3 hours, evaporate, filter, and obtain a pH value of 5.0 Water treatment agent polyaluminum ferric chloride.

[0027] Wherein, the mass ratio between the bauxite, kaolin and coal gangue is: bauxite accounts for 40%-45% of the total am...

Embodiment 2

[0029] First, the mixture of bauxite, kaolin and coal gangue is calcined at 700°C to 900°C for 2 to 4 hours, crushed and sieved (80 mesh to 120 mesh). Then, add 120kg of the separated undersize to the reaction kettle, and at the same time, add 170kg of mixed waste acid solution and heat it to 100°C-150°C under stirring, and fully react for 2-5 hours. Then, add 240kg of the mixture of pyrite slag, fly ash and aluminum ash into the reaction kettle, inject 340kg of mixed waste acid solution and 40kg of oxidant sodium hypochlorite at the same time, heat to 80℃~130℃, and the oxidation reaction is 2~ After 4 hours, add 90kg of a saturated solution of alkalinity regulator calcium oxide, stir fully in the reactor, heat to 70°C-100°C, further polymerize for 1-3 hours, evaporate, filter, and obtain a pH value of 34.5 Water treatment agent polyaluminum ferric chloride.

Embodiment 3

[0031] First, the mixture of bauxite, kaolin and coal gangue is calcined at 700°C to 900°C for 2 to 4 hours, crushed and sieved (80 mesh to 120 mesh). Then, 140kg of the separated undersize was added to the reaction kettle, and at the same time, 190kg of mixed waste acid solution was added and heated to 100°C-150°C under stirring, and fully reacted for 2-5 hours. Then, add 230kg of the mixture of pyrite slag, fly ash and aluminum ash into the reaction kettle, inject 330kg of mixed waste acid solution and 30kg of oxidant sodium hypochlorite at the same time, heat to 80°C ~ 130°C, oxidation reaction 2 ~ After 4 hours, add 80kg of a saturated solution of alkalinity regulator calcium oxide, stir well in the reactor, heat to 70°C-100°C, further polymerize for 1-3 hours, evaporate, filter, and obtain a pH value of 4.0 Water treatment agent polyaluminum ferric chloride.

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PUM

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Abstract

A method for producing water treatment agent polyaluminium chloride from industrial waste residues comprises the following steps: (1) calcining the admixture of bauxite, kaoline and coal slack for 2 to 4 hours; (2) crushing and screening; (3) adding 10 to 25 portions of screenings by weight into a reaction vessel and adding 15 to 25 portions of mixed waste acid liquor by weight; (4) agitating and heating to 100 to 150 DEG C for 2 to 5 hours; (5) adding 10 to 25 portions of the admixture of sulfur-iron slag, fly ashes and aluminum ashes by weight and simultaneously adding 20 to 35 portions of mixed waste acid liquid or 1 to 5 portions of sodium hypochlorite by weight; (6) heating to 80 to 130 DEG C for 2 to 4 hours; (7) heating 3 to 10 portions of calcium oxide saturated solution by weight, agitating and heating to 70 to 100 DEG C, and polymerizing for 1 to 3 hours; and (8) evaporating and filtering, and obtaining the water treatment agent polyaluminium chloride with the pH value of 3.0 to 5.5. The invention has the advantages of wide raw material source, simple process and lower cost.

Description

technical field [0001] The invention belongs to a production method of a water treatment agent, in particular to a method for producing a water treatment agent polyaluminum ferric chloride by using industrial waste residue. Background technique [0002] At present, the commonly used water treatment agents mainly include inorganic coagulants and organic flocculants. Polyaluminum ferric chloride (PAFC) is a new type of inorganic coagulant developed on the basis of polyaluminum chloride (PAC). , Settling speed and other advantages. However, in the prior art of producing polyaluminum ferric chloride products, a large amount of calcium aluminate powder is often required as a raw material, and calcium aluminate powder is expensive, so the cost of the product is relatively high. Wherein, in the method for utilizing industrial waste slag closer to the present invention to produce polyaluminum ferric chloride water purifying agent, the raw material variety used is single, and sourc...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 莫祥银俞琛捷陆春华许仲梓
Owner 常熟紫金知识产权服务有限公司
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