High-quality calcium oxide production process and equipment

A production device, calcium oxide technology, applied in lime production, etc., can solve the problems of low quality calcium oxide, calcium oxide is easy to be mixed with ash, easy to occur raw burning and overburning, etc., to achieve high quality, good synchronization, Effect of saving calcination cost

Active Publication Date: 2017-03-29
建德市泰合新材料有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The present invention overcomes the disadvantages that the calcium oxide produced after limestone calcination is easy to be mixed with ash and slag, and the phenomenon of raw burning and over-burning is easy to occur during the calcination process, and the quality of calcium oxide is low, and a high-quality calcium oxide is provided. Production process and equipment, no ash and slag will be mixed in the production process of calcium oxide, raw burning and over-burning are not easy to occur during the calcination process, the quality of the produced calcium oxide is high, and the purity of calcium oxide reaches more than 99%

Method used

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  • High-quality calcium oxide production process and equipment
  • High-quality calcium oxide production process and equipment
  • High-quality calcium oxide production process and equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: a kind of high-quality calcium oxide production process:

[0027] The first step is to select calcite as raw material, wash and drain;

[0028] In the second step, the calcite is pulverized, and the calcite particles close to the particle size are screened out for subsequent use;

[0029] In the third step, the calcite raw material is sent to a shuttle kiln for calcination, followed by low-temperature calcination at 200-400°C for 4-6 hours, medium-temperature calcination at 400-900°C for 5-7 hours, and high-temperature calcination at 900-1200°C for 4-4 hours. 6 hours, calcination at a constant temperature of 1200°C for 18-25 hours, closed and stored at a constant temperature for 4-6 hours, and cooling for 4-6 hours. About 1 hour, calcination at a high temperature of about 1000°C for about 5 hours, calcination at a constant temperature of 1200°C for about 22 hours, closed storage at a constant temperature for about 5 hours, and cooling for about 5 hours; ...

Embodiment 2

[0035] Embodiment 2: a kind of high-quality calcium oxide production process:

[0036] The first step is to select calcite as raw material, wash and drain;

[0037] In the second step, the calcite is pulverized, and the calcite particles close to the particle size are screened out for subsequent use;

[0038] In the third step, the calcite raw material is sent to a shuttle kiln for calcination, followed by low-temperature calcination at 200-400°C for 4-6 hours, medium-temperature calcination at 400-900°C for 5-7 hours, and high-temperature calcination at 900-1200°C for 4-4 hours. 6 hours, calcination at a constant temperature of 1200°C for 18-25 hours, closed and stored at a constant temperature for 4-6 hours, and cooling for 4-6 hours. About 1 hour, calcination at a high temperature of about 1000°C for about 5 hours, calcination at a constant temperature of 1200°C for about 22 hours, closed storage at a constant temperature for about 5 hours, and cooling for about 5 hours; ...

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Abstract

The present invention discloses a production technology and device of high-quality calcium oxide, and is intended to address the deficiencies that the calcium oxide produced after calcination of the existing limestone can be easily mixed with ash, underfiring and overburning are common in the calcining process, and the calcium oxide has lower quality. The process is as below: 1, selecting calcite as the raw material, cleaning and draining; 2, crushing the calcite and sieving calcite particles in similar size for standby; 3, sending the calcite raw material into a shuttle kiln for calcining; 4, taking calcium oxide out of the kiln, cooling calcium oxide to about 400 DEG C, and milling the calcium oxide at a temperature more than 200 DEG C; 5, after milling, sending the calcium oxide immediately into a sealed dry container for cooling, cooling to around 50 DEG C, and packaging immediately, wherein the time interval between taking calcium oxide out of the kiln and packaging is 30 min.

Description

technical field [0001] The present invention relates to a calcium oxide production technology, more specifically, it relates to a high-quality calcium oxide production process and device. Background technique [0002] my country is one of the earliest countries to produce and utilize calcium oxide. Although my country is a country with a large energy source, due to backward technology, traditional lime kilns have large pollution, poor quality, high energy consumption, and low output, and the quality of burned lime is not up to quality. Compared with the advanced fully automated calcination in the world, there is a big gap. The production of traditional calcium oxide generally uses limestone as raw material, and the limestone and solid fuel are mixed together and loaded into the kiln for calcination. The calcium oxide produced by this method is easily mixed with ash, and the ash is not easy to separate, which seriously affects the quality of calcium oxide. [0003] Chinese p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/10
CPCY02P40/40
Inventor 徐永刚
Owner 建德市泰合新材料有限公司
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