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Polyaluminum ferric silicate, and method for preparing polyaluminum ferric silicate from aluminum ash

A technology of polyaluminum-iron-silicate and aluminum ash, applied in chemical instruments and methods, water/sludge/sewage treatment, membranes, etc., can solve the problems of waste of aluminum resources and the environment, and achieve improved water flux and high salt cut-off rate effect

Inactive Publication Date: 2017-02-08
四川科龙达环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, people regarded aluminum slag as waste and dumped it, which not only caused waste of aluminum resources but also brought environmental problems

Method used

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  • Polyaluminum ferric silicate, and method for preparing polyaluminum ferric silicate from aluminum ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Follow the steps below to prepare iron polyaluminum silicate

[0034] 1. Raw and auxiliary materials incoming inspection:

[0035] 1. Aluminum ash: test Al (aluminum), Al 2 o 3 (aluminum trioxide), AlN (aluminum nitride) content, detection of F, Ba, As, Hg, Pb, Cr, Cd, Cu, Ni, V content, and record.

[0036] 2. Iron-containing waste acid: check free acid content, total iron content, F, Ba, As, Hg, Pb, Cr, Cd, Cu, Ni, V content, and record.

[0037] 3. Hydrochloric acid: check HCl content, check Fe, SO 4- , As content.

[0038] 4. Water glass: check moisture, NaO, SiO 2 content.

[0039] 5. Sodium chlorate: check the effective Cl content.

[0040] 6. Caustic soda or liquid caustic: test NaOH, Na 2 CO 3 content.

[0041] Calculate the amount of each reagent that needs to be added in the subsequent process according to the measured content of each component.

[0042] 2. Ammonia removal process:

[0043] 1. Reaction mechanism:

[0044] AlN+NaOH+H 2 O=NaAlO 2 ...

Embodiment 2

[0069] Follow the steps below to prepare iron polyaluminum silicate

[0070] 1. Raw and auxiliary materials incoming inspection:

[0071] 1. Aluminum ash: test Al (aluminum), Al 2 o 3 (aluminum trioxide), AlN (aluminum nitride) content, detection of F, Ba, As, Hg, Pb, Cr, Cd, Cu, Ni, V content, and record.

[0072] 2. Iron-containing waste acid: check free acid content, total iron content, F, Ba, As, Hg, Pb, Cr, Cd, Cu, Ni, V content, and record.

[0073] 3. Hydrochloric acid: check HCl content, check Fe, SO 4- , As content.

[0074] 4. Water glass: check moisture, NaO, SiO 2 content.

[0075] 5. Sodium chlorate: check the effective Cl content.

[0076] 6. Caustic soda or liquid caustic: test NaOH, Na 2 CO 3 content.

[0077] Calculate the amount of each reagent that needs to be added in the subsequent process according to the measured content of each component.

[0078] 2. Ammonia removal process:

[0079] 1. Reaction mechanism:

[0080] AlN+NaOH+H 2 O=NaAlO 2 ...

Embodiment 3

[0105] Follow the steps below to prepare iron polyaluminum silicate

[0106] 1. Raw and auxiliary materials incoming inspection:

[0107] 1. Aluminum ash: test Al (aluminum), Al 2 o 3 (aluminum trioxide), AlN (aluminum nitride) content, detection of F, Ba, As, Hg, Pb, Cr, Cd, Cu, Ni, V content, and record.

[0108] 2. Iron-containing waste acid: check free acid content, total iron content, F, Ba, As, Hg, Pb, Cr, Cd, Cu, Ni, V content, and record.

[0109] 3. Hydrochloric acid: check HCl content, check Fe, SO 4- , As content.

[0110] 4. Water glass: check moisture, NaO, SiO 2 content.

[0111] 5. Sodium chlorate: check the effective Cl content.

[0112] 6. Caustic soda or liquid caustic: test NaOH, Na 2 CO 3 content.

[0113] Calculate the amount of each reagent that needs to be added in the subsequent process according to the measured content of each component.

[0114] 2. Ammonia removal process:

[0115] 1. Reaction mechanism:

[0116] AlN+NaOH+H 2 O=NaAlO 2 +N...

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PUM

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Abstract

The invention provides a method for preparing polyaluminum ferric silicate from aluminum ash. The method comprises the following steps: mixing the aluminum ash with hydrochloric acid, carrying out a reaction, mixing the obtained substance with iron-containing waste acids, adding a first alkali solution, heating and stirring the obtained solution, gradually adding water glass in the stirring process in order to carry out a reaction, and ageing the above obtained reaction product after the reaction ends in order to obtain the polyaluminum ferric silicate. The invention also provides the polyaluminum ferric silicate prepared through using the method.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing polyaluminum iron silicate by using aluminum ash. Background technique [0002] Polymerized aluminum iron silicate (PSAF) is a new type of water-soluble polymer electrolyte. It is mainly used to purify drinking water, and can also be used for special water quality treatment of water supply, cadmium removal, fluorine removal, radioactive pollution removal, oil slick removal, etc. It is also used for industrial wastewater treatment, such as printing and dyeing wastewater, and is also widely used in foundry, papermaking, medicine, leather, etc. It has an immediate effect on the treatment of sewage in the field of sewage treatment. [0003] Polymerized aluminum iron silicate has the characteristics of high ionicity, easy solubility in water (completely soluble in water in the whole pH range, and not affected by low water temperature), non-gelling, and good hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/02C02F1/44
CPCB01D67/0044B01D67/0046B01D67/0058B01D71/02B01D2323/08B01D2323/50C02F1/445
Inventor 冯林
Owner 四川科龙达环保股份有限公司
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