Preparation method for calcium hydrate loading activated clay

A technology of activated clay and calcium hydroxide, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of poor wastewater treatment, long cycle, instability, etc., achieve short cycle, low production cost, The effect of high production efficiency

Active Publication Date: 2016-01-27
GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of loaded calcium hydroxide activated clay to solve the problem of low and unstable production quality of loaded calcium hydroxide bentonite in the prior art, long cycle, high cost, and no waste water. Easy to handle and other issues

Method used

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  • Preparation method for calcium hydrate loading activated clay
  • Preparation method for calcium hydrate loading activated clay
  • Preparation method for calcium hydrate loading activated clay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of loaded calcium hydroxide activated clay, comprising the following steps:

[0031] S1: Batching pulping: mix bentonite and activated clay mother liquor waste acid with a concentration of 18% in a weight ratio of 1:3 to obtain a slurry material;

[0032] S2: Acid activation reaction: Send the slurry material obtained in step S1 to a heat-resistant and acid-resistant reaction kettle, and then heat it to 95°C with steam, and react continuously for 4 hours at a stirring speed of 30r / min to obtain the reacted slurry material;

[0033] S3: Press filtration for the first time: Use a pump to transport the slurry material reacted in step S2 to a plate and frame filter press, and perform press filtration at a pressure of 0.7 MPa until the water content of the filter cake is 50%;

[0034] S4: Washing and second pressure filtration: add water 3 times the weight of the filter cake obtained in step S3 for stirring and washing, and add polyacrylamide flocculant,...

Embodiment 2

[0040] A preparation method of loaded calcium hydroxide activated clay, comprising the following steps:

[0041] S1: Batching and pulping: mix bentonite and activated clay mother liquor waste acid with a concentration of 22% in a weight ratio of 1:3 to obtain a slurry material;

[0042] S2: Acid activation reaction: Send the slurry material obtained in step S1 to a heat-resistant and acid-resistant reaction kettle, then heat it to 100°C with steam, and react continuously for 3.5 hours at a stirring speed of 40r / min to obtain the reacted slurry material;

[0043] S3: Press filtration for the first time: Use a pump to transport the slurry material reacted in step S2 to a plate and frame filter press, and perform press filtration at a pressure of 1.0 MPa until the water content of the filter cake is 45%;

[0044] S4: Washing and second pressure filtration: add water 6 times the weight of the filter cake obtained in step S3 for stirring and washing, and add polyacrylamide floccula...

Embodiment 3

[0050] A preparation method of loaded calcium hydroxide activated clay, comprising the following steps:

[0051] S1: Batching pulping: mix bentonite and activated clay mother liquor waste acid with a concentration of 20% in a weight ratio of 1:3 to obtain a slurry material;

[0052] S2: Acid activation reaction: Send the slurry material obtained in step S1 to a heat-resistant and acid-resistant reaction kettle, then heat it to 97°C with steam, and react continuously for 3.7 hours at a stirring speed of 35r / min to obtain the reacted slurry material;

[0053] S3: Press filtration for the first time: Use a pump to transport the slurry material after the reaction in step S2 to a plate and frame filter press, and perform press filtration at a pressure of 0.85 MPa until the water content of the filter cake is 47%;

[0054] S4: Washing and second pressure filtration: add water 4.5 times the weight of the filter cake obtained in step S3 for stirring and washing, and add polyacrylamide f...

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Abstract

The invention discloses a preparation method for calcium hydrate loading activated clay, and belongs to the bentonite deep processing technology field. The calcium hydrate loading activated clay is prepared after steps of blending, slurrying, acid activation reaction, first press filtration, washing, secondary press filtration, alkalization, third press filtration, drying, crushing and the like. The prepared calcium hydrate loading activated clay is high and stable in quality, the preparation technology is simple, the cycle is short, safety and production efficiency are high, and the production cost and energy consumption are low. Obtained waste acid is recycled, acid and sewage processing cost is lowered, and energy saving and emission reduction effects are achieved.

Description

【Technical field】 [0001] The invention belongs to the technical field of bentonite deep processing, and in particular relates to a preparation method of activated clay loaded with calcium hydroxide. 【Background technique】 [0002] Bentonite is called natural nano material and universal clay. The quality of bentonite in my country is excellent, and its ore reserves rank second in the world. Except for a small amount of exports as raw materials for organic bentonite, the rest are sold domestically in the form of bentonite powder and activated clay. These products are primary products with low economic benefits and low resource utilization levels. . In order to obtain greater economic benefits, it is necessary to develop serialized new products with high-tech content and expand new areas of application. [0003] Calcium hydroxide-loaded bentonite is obtained from bentonite as raw material, which is acidified to form activated clay, and then alkalized on this basis. It is a lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 韦藤幼梁福珏
Owner GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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