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Method for preparing pure calcium aluminate powder for water treatment

A technology of calcium aluminate powder and calcium carbonate powder, which is applied in the preparation of alkaline earth metal aluminate/aluminum oxide/aluminum hydroxide, etc., can solve the problems of unsuitable polyaluminum chloride and uncontrollable heavy metal indicators of ore, and achieve reduction The use of raw material grinding, less insoluble matter, and the effect of reducing investment

Inactive Publication Date: 2014-06-25
GUANGXI AL STONE ECO FRIENDLY MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the current production of calcium aluminate powder uses bauxite and limestone as raw materials, the heavy metal indicators in the ore are uncontrollable, and the heavy metals in the produced calcium aluminate will exceed the national standard, which is not suitable for the production of polychloride for drinking water. aluminum

Method used

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  • Method for preparing pure calcium aluminate powder for water treatment
  • Method for preparing pure calcium aluminate powder for water treatment
  • Method for preparing pure calcium aluminate powder for water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Mix industrial-grade alumina powder containing 98-99% aluminum oxide with calcium carbonate powder containing 55-56% calcium oxide, lime powder containing 95-98% calcium oxide, and 90% calcium hydroxide. ~98% calcium hydroxide powder, calculated according to the production of 100 kilograms of pure calcium aluminate powder, the ratio of the raw materials by weight is industrial grade alumina powder: calcium carbonate powder: lime powder: calcium hydroxide powder=70: Mix at a ratio of 55:0:0 and stir evenly to obtain a mixture;

[0024] 2. Shape the mixture obtained in step 1 or use the mixture directly. If you use the mixture directly, you need to put it on a tray. The following examples are the same;

[0025] 3. Push the shaped material obtained in step 2 or directly use the mixed material into a natural gas kiln, and sinter for 2 hours at a sintering temperature of 1350 ° C. After sintering the clinker, cool it and grind it into pure calcium aluminate powder.

[00...

Embodiment 2

[0029] 1. Mix industrial-grade alumina powder containing 98-99% aluminum oxide with calcium carbonate powder containing 55-56% calcium oxide, lime powder containing 95-98% calcium oxide, and 90% calcium hydroxide. ~98% calcium hydroxide powder, calculated according to the production of 100 kilograms of pure calcium aluminate powder, the ratio of the raw materials by weight is industrial grade alumina powder: calcium carbonate powder: lime powder: calcium hydroxide powder=70: Mix at a ratio of 0:32:0 and stir evenly to obtain a mixture;

[0030] 2. Shape the mixture obtained in step 1 or directly use the mixture;

[0031] 3. Push the shaped material obtained in step 2 or directly use the mixed material into a natural gas kiln, and sinter for 1 hour at a sintering temperature of 1400°C. After sintering the clinker, cool it and grind it into pure calcium aluminate powder.

[0032] The obtained pure calcium aluminate powder has a mass percentage of aluminum oxide of 68.85% and a ...

Embodiment 3

[0035] 1. Mix industrial-grade alumina powder containing 98-99% aluminum oxide with calcium carbonate powder containing 55-56% calcium oxide, lime powder containing 95-98% calcium oxide, and 90% calcium hydroxide. ~98% calcium hydroxide powder, calculated according to the production of 100 kilograms of pure calcium aluminate powder, the ratio of the raw materials by weight is industrial grade alumina powder: calcium carbonate powder: lime powder: calcium hydroxide powder=70: Mix at a ratio of 0:0:45 and stir evenly to obtain a mixture;

[0036] 2. Shape the mixture obtained in step 1 or directly use the mixture;

[0037] 3. Push the shaped material obtained in step 2 or directly use the mixed material into a natural gas kiln, and sinter for 2 hours at a sintering temperature of 1350 ° C. After sintering the clinker, cool it and grind it into pure calcium aluminate powder.

[0038] The obtained pure calcium aluminate powder has a mass percentage of aluminum oxide of 68.92% and...

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Abstract

The invention discloses a method for preparing pure calcium aluminate powder for water treatment. The method comprises the following steps: (1) according to 100kg of pure calcium aluminate powder to be produced, uniformly stirring the following raw materials in parts by weight: 0-70kg of industrial grade alumina powder or 0-107kg of aluminum hydroxide powder, 0-76kg of calcium carbonate powder, 0-44kg of lime powder and 0-61kg of calcium hydroxide powder, thus obtaining a mixture; (2) moulding the mixture or directly using the mixture; (3) pushing the moulded mixture or the directly used mixture into a natural gas kiln, sintering at the sintering temperature of 1350-1400 DEG C for 1-2 hours, cooling after the mixture is sintered into clinker, and milling to obtain the pure calcium aluminate powder in which the mass percent of aluminum oxide is 57-69 percent, the mass percent of calcium oxide is 30-42 percent and the mass percent of the acid dissolution rate is 95-99.5 percent. The pure calcium aluminate powder for water treatment can be prepared by adopting the industrial grade alumina powder or industrial grade aluminum hydroxide powder and calcium carbonate powder or lime powder or calcium hydroxide powder.

Description

technical field [0001] The invention relates to the technical field of preparation of aluminum salt water purifying agent raw materials, in particular to a preparation method of pure calcium aluminate powder for water treatment, especially the use of industrial grade aluminum oxide powder or industrial grade aluminum hydroxide powder and calcium carbonate powder or Lime powder or calcium hydroxide powder is used to prepare pure calcium aluminate powder for water treatment agent. Background technique [0002] With the rapid development of environmental protection and the continuous strengthening of people's awareness of environmental protection, the protection of water resources and water health have attracted more and more attention from the government and the public, and the requirements for water purifier series products are getting higher and higher. Among the water purifier series products, aluminum salt series products are used in the largest amount and in the widest ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/16
Inventor 欧卫华
Owner GUANGXI AL STONE ECO FRIENDLY MATERIAL CO LTD
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