Method for producing quicklime by calcination of small particle size limestone

A technology of quicklime and limestone, which is applied in the field of limestone calcination to produce quicklime, which can solve the problems of high burning rate of quicklime, increase of power consumption of calcium carbide furnace, increase consumption of calcium carbide furnace, etc., and achieve reduction of burning rate, power consumption and cost reduction Effect

Active Publication Date: 2019-03-01
中盐吉兰泰氯碱化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the particle size of limestone used for calcination to produce quicklime is 40-70mm. The large size of limestone leads to a high burning rate of quicklime, which in turn increases the power consumption of the calcium carbide furnace, and the large-sized quicklime enters the calcium carbide furnace, which affects the stability of the calcium carbide furnace. run
[0004] In order to reduce the particle size of the quicklime, a crusher was added at the lower part of the finished product warehouse of the lime kiln to control the particle size of the quicklime to less than 40mm. However, during the use of the crusher, it was found that although the particle size of the quicklime was controlled, a large amount of powder was produced, which invisibly increased calcium carbide. Furnace consumption increases the production cost of calcium carbide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: The method for producing quicklime by calcination of small-grained limestone. The limestone is calcined in a double-beam vertical lime kiln. The production capacity of quicklime is 14t / h, the particle size of the limestone is controlled at 30-60mm, the power of the main induced draft fan is 500KW, and the speed of the main induced draft fan is controlled. At 1420r / min, the gas intake volume is controlled at 5800m 3 / h, the combustion air intake volume is controlled at 17400m 3 / h, the number of kiln exits per hour is 40 times. The cooling fan under the lime kiln is controlled by a frequency converter, and the frequency of the frequency converter is 40Hz.

Embodiment 2

[0011] Example 2: The method for producing quicklime by calcination of small-grained limestone, the limestone is calcined in a double-beam vertical kiln lime kiln, the production capacity of quicklime is 14.2t / h, the particle size of limestone is controlled at 30-60mm, the power of the main induced draft fan is 500KW, and the speed of the main induced draft fan is Control at 1460r / min, gas air intake at 6500m 3 / h, the combustion air intake volume is controlled at 19500m 3 / h, the number of kiln exits per hour is controlled at 45 times. The cooling fan under the lime kiln is controlled by a frequency converter, and the frequency of the frequency converter is 43Hz.

Embodiment 3

[0012] Example 3: The method for producing quicklime by calcining small-grained limestone, adopting a double beam vertical kiln lime kiln to calcinate limestone, the production capacity of quicklime is 14.5t / h, the particle size of limestone is controlled at 30-60mm, the power of the main induced draft fan is 500KW, and the speed of the main induced draft fan is Control at 1440r / min, gas air intake at 6200m 3 / h, the combustion air intake volume is controlled at 18500m 3 / h, the number of kiln exits per hour is controlled at 50 times. The cooling fan under the lime kiln is controlled by a frequency converter, and the frequency of the frequency converter is 46Hz.

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PUM

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Abstract

The invention discloses a method for producing quicklime through forging small-sized limestone. The method has the quicklime productivity of 14-14.5 t / h and can control the quicklime granularity to be 30-60 mm. The method provided by the invention has the following advantages: normal forging of small-sized limestone in a lime kiln is realized, in-furnace limestone with the granularity of 40 mm or below accounts for 80%, the granularity of quicklime is effectively reduced, the quicklime underfiring rate is lowered, the operation condition of a calcium carbide furnace can reach a higher level, and the power consumption during calcium carbide production is reduced.

Description

technical field [0001] The invention relates to a method for producing quicklime by calcining limestone, in particular to a method for producing quicklime by calcining small-sized limestone. Background technique [0002] Calcium carbide production is to mix quicklime and carbon materials in a certain proportion and produce calcium carbide through high temperature reaction. Quicklime is an important raw material for calcium carbide production, and the particle size of quicklime determines the operation of the calcium carbide furnace. [0003] At present, the particle size of limestone used for calcination to produce quicklime is 40-70mm. The large size of limestone results in a high burning rate of quicklime, which in turn increases the power consumption of the calcium carbide furnace, and when the quicklime with larger particle size enters the calcium carbide furnace, it affects the stability of the calcium carbide furnace. run. [0004] In order to reduce the particle siz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/10
CPCC04B2/10
Inventor 周杰马占玉多文军杜景忠俞慧军许多福孙正栋郝博聂开斌刘岩
Owner 中盐吉兰泰氯碱化工有限公司
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