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Powdery high-activity calcium oxide and production process thereof

A production process and high activity technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of waste of limestone resources, secondary disasters, land occupation, etc., achieve less overburning rate, improve thermal insulation Efficiency, uniform heating effect

Inactive Publication Date: 2018-09-07
郑小华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the above-mentioned three methods usually can only use massive limestone raw materials within 20 to 80mm for production, often resulting in waste of more than 30% of limestone resources, these wasted finely crushed limestone forms mining waste, which will also form land occupation and Environmental pollution, forming secondary disasters

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The production method of powdery highly active calcium oxide in the present embodiment may further comprise the steps:

[0027] (1) Use a crusher to crush the limestone ore into unequal small pieces of crushed material. The coarse material produced is sent to the pulverizer through the electromagnetic vibrating feeder, and the oversized ore is returned to the crusher. broken. The mill grinds the limestone into a powder with a particle size of 0.1-3mm;

[0028] (2) The powdered limestone that meets the requirements after the grinding treatment is directly put into the 5-stage cyclone preheating cylinder for suspension preheating and decomposition. The insulation layer is 2cm to 4cm. The preparation method of the insulation layer is as follows: 20 parts of kaolin, 5 parts of foaming agent, 15 parts of aluminum silicate, 8 parts of glass fiber, 10 parts of nano-silica airgel, dihydrogen phosphate 10 parts of aluminum and 20 parts of water are mixed evenly, then placed in...

Embodiment 2

[0032] The production method of powdery highly active calcium oxide in the present embodiment may further comprise the steps:

[0033] (1) Use a crusher to crush the limestone ore into unequal small pieces of crushed material. The coarse material produced is sent to the pulverizer through the electromagnetic vibrating feeder, and the oversized ore is returned to the crusher. broken. The mill grinds the limestone into a powder with a particle size of 0.1-3mm;

[0034] (2) The powdered limestone that meets the requirements after the grinding treatment is directly put into the 5-stage cyclone preheating cylinder for suspension preheating and decomposition. It is an insulation layer of 2cm to 4cm. The preparation method of the insulation layer is as follows: 30 parts of kaolin, 3 parts of foaming agent, 10 parts of aluminum silicate, 15 parts of glass fiber, 5 parts of nano-silica airgel, dihydrogen phosphate 8 parts of aluminum and 15 parts of water are mixed evenly, then place...

Embodiment 3

[0038] The production method of powdery highly active calcium oxide in the present embodiment may further comprise the steps:

[0039] (1) Use a crusher to crush the limestone ore into unequal small pieces of crushed material. The coarse material produced is sent to the pulverizer through the electromagnetic vibrating feeder, and the oversized ore is returned to the crusher. broken. The mill grinds the limestone into a powder with a particle size of 0.1-3mm;

[0040] (2) The powdered limestone that meets the requirements after grinding treatment is directly put into the 5-stage cyclone preheating cylinder for suspension preheating and decomposition. It is an insulation layer of 2cm to 4cm. The preparation method of the insulation layer is as follows: 40 parts of kaolin, 0.5 parts of foaming agent, 5 parts of aluminum silicate, 20 parts of glass fiber, 0.5 parts of nano-silica airgel, dihydrogen phosphate 5 parts of aluminum and 25 parts of water are evenly mixed, then placed...

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Abstract

The invention discloses powdery high-activity calcium oxide and a production process thereof, belonging to the technical field of the production of active lime. According to the adopted technical scheme, the production process comprises the steps of crushing limestone into small crushed materials with different sizes by virtue of a crushing machine, conveying produced coarse materials into a pulverizer by virtue of an electromagnetic vibration feeder, grinding the limestone into powder with the particle size of 0.1mm-3mm, storing the powdery limestone into a material bin, or directly conveyingthe powdery limestone into a multi-stage cyclone preheating cylinder for suspension type preheating decomposition, and conveying the powdery limestone into a rotary kiln for calcination, wherein a spiral distributor is further arranged in the rotary kiln and is used for uniformly distributing the materials in the rotary kiln, so that the 100% utilization of the limestone resource is realized, andthe large-scale production is realized. Advanced scientific instruments and techniques are applied to the whole production process of powdery high-activity calcium oxide, so that the production process of powdery high-activity calcium oxide is an efficient, high-quality and low-consumption modern calcium oxide production method which is accordant with environmental requirements and large-scale and automatic features.

Description

technical field [0001] The invention relates to the technical field of active lime production, in particular to a powdery high-activity calcium oxide and a production process thereof. Background technique [0002] Active lime is the basic raw material of the iron and steel industry, and is also widely used in calcium carbide, electric power, glass fiber, building materials, papermaking, sewage treatment and other industries, with an annual consumption of nearly one billion tons. At present, there are mainly three kinds of active lime production methods at home and abroad. The first method uses a vertical kiln as the main roasting equipment, usually using lump limestone larger than 20mm as raw material and lump coal as fuel. ; The second type is usually also the block limestone greater than 20mm as raw material, but it is a production method with combustible gas as the fuel, that is, the so-called gas-fired kiln represented by the Maerz kiln; the third type is the rotary kiln...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/06C04B28/34C04B38/10C04B28/00
Inventor 不公告发明人
Owner 郑小华
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