Preparation method of polymeric ferric aluminous sulphate by using pyrite wastewater and treatment sludge

A technology for polymerizing ferric aluminum sulfate and wastewater treatment, applied in the direction of ferric sulfate, etc., can solve the problems of small residual chromaticity, small flocculation volume, large residual chromaticity, etc., achieve obvious social and environmental benefits, solve environmental pollution problems, realize The effect of resource processing

Active Publication Date: 2011-02-16
日照高远汽车配件有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

The hydrolysis of polyaluminum sulfate is weak, the flocculation volume is small, loose, and the sedimentation is slow, but the residual chroma is small; while the hydrolysis of polyferric sulfate is strong, the flocculation volume is large, dense, fast sedimentation, good strength, but the residual chroma is large

Method used

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  • Preparation method of polymeric ferric aluminous sulphate by using pyrite wastewater and treatment sludge
  • Preparation method of polymeric ferric aluminous sulphate by using pyrite wastewater and treatment sludge

Examples

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Embodiment 1

[0025] Take 500g of pyrite wastewater treatment sludge, put it into a constant temperature oven, bake it at 80°C for 48 hours, and grind it to obtain dry sludge powder, which is ready for use. Take 50g of dry sludge powder, add 170mL of acid solution (volume ratio of pyrite wastewater to concentrated sulfuric acid 9:1), 70°C, electric stirring for 20min, centrifugation for 20min, and discard the precipitate. Move the acid extract to the reactor, add 80 g of ferrous sulfate heptahydrate, and adjust the pH value of the acid extract to 0.9 with concentrated sulfuric acid with a mass concentration of 98%. Heat in a water bath at 45°C, add 30mL of 30% hydrogen peroxide solution (0.288molH 2 o 2 ), the rotating speed of the electric stirrer was 150r / min, the reaction time was 1.5h, and 199.5g of polyferric aluminum sulfate was obtained.

Embodiment 2

[0027] Concentrated sulfuric acid with a mass concentration of 98% was added to adjust the pH value of the acid extract to 0.7, and other operations were the same as in Example 1 to obtain 198.6 g of polyferric aluminum sulfate.

Embodiment 3

[0029] Heated in a water bath to 55° C., and other operations were the same as in Example 1 to obtain 188.1 g of polyferric aluminum sulfate.

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Abstract

The invention discloses a preparation method of polymeric ferric aluminous sulphate by using pyrite wastewater and treatment sludge, comprising the following steps: drying the treatment sludge of the pyrite wastewater and then pulverizing to obtain the acid solution; stirring for 10 to 30 minutes at 50 to 80 DEG C; centrifuging and removing the precipitate to obtain an acid extract; adding the ferrous sulphate into the acid extract, and dropwise adding the concentrated sulfuric acid to regulate the pH value to 0.6 to 1.0; and adding the oxidizing agent and stirring to react for 1 to 3 hours at 30 to 60 DEG C, thus finally obtaining the polymeric ferric aluminous sulphate. The invention has the beneficial effects that the invention solves the environmental pollution problem of the pyrite wastewater and treatment sludge, as well as realizes the recycling process of the wastes through the preparation of the polymeric ferric aluminous sulphate by using the useful components in the pyrite wastewater and treatment sludge. The method of the invention can be widely used in the recycling of the pyrite wastewater and the treatment sludge, and has significant social and environmental benefits.

Description

(1) Technical field [0001] The invention relates to a method for preparing polymerized iron-aluminum sulfate, in particular to a method for preparing polymerized iron-aluminum sulfate by utilizing pyrite wastewater and treatment sludge. (2) Background technology [0002] Pyrite is an abundant mineral resource in the world. It is mainly composed of sulfur in the mantle, iron in the crust and other impurity elements such as Al, Mn, Cu, etc., after tens of thousands of years under suitable geochemical conditions. Formed by the mineralization evolution (hydrothermal, sedimentary, biological, metamorphic, composite, etc.), the main component of pyrite is FeS 2 (pyrite, marcasite), FeS (pyrhotite), and also contains Al, Zn, Cu, Pb and other metal elements. During the mining process, pyrite is in contact with the atmosphere (even after the mine is closed, surface water leakage can bring dissolved oxygen into the pit), and under the action of microorganisms, a large amount of acidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14
Inventor 林春绵何卓李雁
Owner 日照高远汽车配件有限公司
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