A kind of production method of active calcium oxide

A technology of active calcium oxide and production method, applied in chemical instruments and methods, separation methods, dispersed particle separation and other directions, can solve the problems of low output, high energy consumption, low proportion of active calcium oxide, etc. Reduce thermal energy consumption and enhance thermal insulation effect

Active Publication Date: 2020-06-16
广西华洋矿源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Calcium oxide is the best material for moisture absorption, moisture absorption, defoaming and drying of plastics, rubber and chemical raw materials. Auxiliary, garbage incineration, acid-base neutralization, bleaching, drying in metal factories, desulfurization and deacidification in thermal power plants, petroleum lubricants, feed, stone cutting aids, gypsum board caulking coagulants, astringents, food and pharmaceuticals, etc. , most of the limestone factories produce calcium oxide by calcination method, which tends to have high energy consumption, low output and low proportion of active calcium oxide; therefore, it is necessary to provide a calcination method with low energy consumption, Utilize thermal insulation materials and coatings to maximize the utilization of heat energy, minimize the energy loss of the calcination method, and increase the output of activated calcium oxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The production method of present embodiment active calcium oxide comprises the steps:

[0023] (1) pretreatment: the limestone is broken into limestone fragments with a particle size of 20 mm through a crusher;

[0024] (2) Preheating: The crushed limestone in step (1) is transported to the distributor located on the top of the preheating kiln, and is distributed into the preheating kiln through the distributor, and the crushed limestone moves downward from the top of the preheating kiln. The preheating gas moves upward from the bottom to preheat the crushed limestone, and keep the pressure of the preheating gas on the top of the preheating kiln at -100Pa, preheating for 4 hours; the temperature of the preheating gas is: 500°C;

[0025] (3) Calcination: After preheating, close the exhaust gas inlet of the preheating kiln, turn on the blower, and send the preheated limestone into the calcination kiln through the blower for continuous calcination. The wind speed of blowe...

Embodiment 2

[0035] The production method of present embodiment active calcium oxide comprises the steps:

[0036] (1) pretreatment: the limestone is broken into limestone fragments with a particle size of 90 mm through a crusher;

[0037] (2) Preheating: The crushed limestone in step (1) is transported to the distributor located on the top of the preheating kiln, and is distributed into the preheating kiln through the distributor, and the crushed limestone moves downward from the top of the preheating kiln. The preheating gas moves upward from the bottom to preheat the crushed limestone, and keep the pressure of the preheating gas on the top of the preheating kiln at 100 Pa, preheating for 7 hours; the temperature of the preheating gas is: 700°C;

[0038] (3) Calcination: After preheating, close the exhaust gas inlet of the preheating kiln, turn on the blower, and send the preheated limestone into the calcination kiln through the blower for continuous calcination. The wind speed of blowe...

Embodiment 3

[0048] The production method of present embodiment active calcium oxide comprises the steps:

[0049] (1) pretreatment: the limestone is broken into limestone fragments with a particle size of 50 mm through a crusher;

[0050] (2) Preheating: The crushed limestone in step (1) is transported to the distributor located on the top of the preheating kiln, and is distributed into the preheating kiln through the distributor, and the crushed limestone moves downward from the top of the preheating kiln. The preheating gas moves upward from the bottom to preheat the crushed limestone, and keep the pressure of the preheating gas on the top of the preheating kiln at 10 Pa, preheating for 5 hours; the temperature of the preheating gas is: 600°C;

[0051] (3) Calcination: After preheating, close the exhaust gas inlet of the preheating kiln, turn on the blower, and send the preheated limestone into the calcination kiln through the blower for continuous calcination. The calcination temperatu...

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Abstract

The invention relates to the technical field of limestone processing, in particular to a production method of active calcium oxide. By the production method, a preheating kiln is used for preheating crushed limestone and preheating gas is exhaust gas produced in the calcining and cooling processes, so that the calcining time of the calcining process is shortened and the yield of the calcium oxideis ensured; a self-made insulation layer is used for insulating a calcining kiln, so that energy consumption is lowered, the insulation efficiency of the calcining kiln is improved, and the energy-saving and environment-friendly effects are achieved; moreover, the interior of the calcining kiln is coated with coating, so that heat can be uniformly distributed in the calcining kiln so as to heat the calcining kiln uniformly during a reaction. Therefore, the yield of the active calcium oxide is increased; the recycled exhaust gas is also pretreated, so that the contents of large particulate matters and impurities in the exhaust gas can be reduced and the impurity content of the active calcium oxide is reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of limestone processing, in particular to a production method of activated calcium oxide. 【Background technique】 [0002] Calcium oxide is the best material for moisture absorption, moisture absorption, defoaming and drying of plastics, rubber and chemical raw materials. Auxiliary, garbage incineration, acid-base neutralization, bleaching, drying in metal factories, desulfurization and deacidification in thermal power plants, petroleum lubricants, feed, stone cutting aids, gypsum board caulking coagulants, astringents, food and pharmaceuticals, etc. , most of the limestone factories produce calcium oxide by calcination method, which tends to have high energy consumption, low output and low proportion of active calcium oxide; therefore, it is necessary to provide a calcination method with low energy consumption, Utilize the thermal insulation material and coating to maximize the utilization of heat energy,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/10C04B28/26C04B28/14B01D47/02
Inventor 李文康张宸宇欧西江
Owner 广西华洋矿源材料有限公司
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