Method for producing calcium oxide by use of calcite

A technology of calcite and calcium oxide, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of calcite production of calcium oxide

Inactive Publication Date: 2012-09-12
曲玉珠
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Problems solved by technology

[0005] The technical effect of the present invention is: solve the difficult problem that calcite cannot be used to produce calcium oxide by mixing traditional process fu

Method used

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Embodiment Construction

[0006] The steps of material selection, calcination and grinding are the same as those in the traditional production process, but the specific method of material selection and calcination process is to use calcite containing 53.15% calcium oxide and 92% whiteness as raw material, and crush it into 20-300 cubic millimeters The fuel can be liquefied gas, natural gas, coal gas or gas produced by the gas generator. 1. Tunnel kiln: put the ore on the tunnel kiln car and push it into the kiln, and preheat in the preheating stage for 5~ 8 hours, the temperature is controlled at 0-600°C, and then enters the calcination stage, calcination is 6-10 hours, the temperature is controlled at 600-1200°C, and finally enters the cooling stage, cooling for 4-6 hours, the temperature of each section is automatically controlled to ensure the kiln Calcium oxide has no raw burning and over burning. 2. Use a smoke-reversing kiln: use refractory materials as interlayers in the kiln, place shelf bricks...

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Abstract

A method for producing calcium oxide by the use of calcite relates to a method for producing high brightness and high purity calcium oxide by the use of calcite and comprises steps of material selection, calcining and grinding. According to the invention, calcite with calcium oxide content being more than or equal to 53.15% and brightness being more than or equal to 92% is selected as a raw material, crushed into blocks of 20-300 cubic millimeters, and calcined in kiln by the use of gaseous fuel. Preheating stage lasts for 5-8 hours at the temperature of 0-600 DEG C, calcination lasts for 6-10 hours at the temperature of 600-1200 DEG C, and cooling lasts for 4-6 hours. The method solves the problem that calcium oxide can not be produced by the use of calcite when a traditional technological fuel and raw materials are mixed. By the use of calcite to produce calcium oxide, its brightness can be raised by 3 percentage points and can reach 92%, and the calcium oxide content can reach 93%.

Description

technical field [0001] The invention relates to a method for producing calcium oxide with high whiteness and high purity by using calcite. Background technique [0002] The traditional production of calcium oxide is to use limestone as raw material, adopt the vertical kiln calcination process, mix limestone and solid fuel together or put them into the kiln for calcination in layers. Using this method to produce calcium oxide, the raw materials and fuel are mixed together during the calcination process, and the produced calcium oxide is mixed with ash and cannot be separated. The maximum whiteness of calcium oxide can only reach 89%, and the fluidity and grinding particle size fluctuate. Also big. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for producing calcium oxide by using calcite as raw material and changing the calcination method. [0004] The technical solution of the present invention is: a ...

Claims

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Application Information

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IPC IPC(8): C01F11/06
Inventor 曲玉珠
Owner 曲玉珠
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