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Kiln-free calcining process for producing powdery active lime

A technology of activated lime and calcination process, which is applied in the direction of lime production, etc. It can solve the problems of low activity of powdered activated lime and low productivity of powdered activated lime, so as to reduce labor intensity of workers, reduce equipment investment cost, and improve lime quality Effect

Active Publication Date: 2022-03-29
合肥丰达水泥科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kilnless calcination process for producing powdered active lime, which improves the efficiency of limestone calcination, thereby solving the problems of low productivity of powdered active lime and low activity of powdered active lime in the background technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: The present invention provides a kind of technical scheme, specifically a kind of kilnless calcination process of producing powdery activated lime, comprising the following steps:

[0039] S1, pulverizing quicklime;

[0040] Wherein, when using a pulverizer to pulverize quicklime, the pulverizing chamber of the pulverizer is first sealed and then vacuumed and dried;

[0041] Wherein, when vacuumizing the pulverizing chamber of the pulverizer, ensure that the vacuum degree in the pulverizing chamber is 200 pa, and the humidity is 20%, and when pulverizing the quicklime, ensure that the sieve residue of the pulverized quicklime with a particle size of 0.08 mm is not more than 12%;

[0042] S2, conveying the pulverized quicklime to the raw meal homogenization storehouse;

[0043] S3, suspending and preheating the quicklime powder;

[0044] Firstly, the quicklime powder in the raw meal homogenization storage is fed into the first ascending pipe between the i...

Embodiment 2

[0058] Embodiment two: the present invention provides a kind of technical scheme, specifically a kind of kilnless calcination process of producing powdery activated lime, comprising the following steps:

[0059] S1, pulverizing quicklime;

[0060] Wherein, when using a pulverizer to pulverize quicklime, the pulverizing chamber of the pulverizer is first sealed and then vacuumed and dried;

[0061] Wherein, when vacuumizing the pulverizing chamber of the pulverizer, ensure that the vacuum degree in the pulverizing chamber is 400pa, and the humidity is 10%, and when pulverizing the quicklime, ensure that the sieve residue of the pulverized quicklime with a particle size of 0.08mm is not more than 12%;

[0062] S2, conveying the pulverized quicklime to the raw meal homogenization storehouse;

[0063] S3, suspending and preheating the quicklime powder;

[0064] Firstly, the quicklime powder in the raw meal homogenization storage is fed into the first ascending pipe between the i...

Embodiment 3

[0078] Embodiment three: the present invention provides a kind of technical scheme, specifically a kind of kilnless calcination process of producing powdery activated lime, comprising the following steps:

[0079] S1, pulverizing quicklime;

[0080] Wherein, when using a pulverizer to pulverize quicklime, the pulverizing chamber of the pulverizer is first sealed and then vacuumed and dried;

[0081] Wherein, when vacuumizing the crushing chamber of the pulverizer, ensure that the vacuum degree in the crushing chamber is 300pa, and the humidity is 15%, and when crushing the quicklime, ensure that the sieve residue of the crushed quicklime with a particle size of 0.08mm is not more than 12%;

[0082] S2, conveying the pulverized quicklime to the raw meal homogenization storehouse;

[0083] S3, suspending and preheating the quicklime powder;

[0084] Firstly, the quicklime powder in the raw meal homogenization storage is fed into the first ascending pipe between the inlet end o...

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PUM

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Abstract

The invention relates to the technical field of lime processing, in particular to a kiln-free calcining process for producing powdery active lime, which comprises the following steps: S1, crushing quick lime; s2, conveying the crushed quick lime to a raw material homogenization silo; s3, the quicklime powder in the raw material homogenizing silo is subjected to gas-solid separation through first, second, third and fourth cyclone cylinders in sequence; separated materials are fed into a decomposing furnace to be decomposed, and formed powdery active lime is discharged into a fifth-stage cyclone cylinder to be separated; s4, the powdery active lime is subjected to heat exchange and separation through a first cooling cyclone and a second cooling cyclone in sequence; air separated by the first cooling cyclone cylinder is discharged into a heating cavity of the afterburning furnace to be heated and then is discharged into a combustion cavity of the decomposing furnace, and a finished lime product is discharged into a discharging channel through a discharging end at the bottom of the second cooling cyclone cylinder; s5, the powdery active lime finished product in the discharging channel is conveyed into a finished product warehouse to be stored for standby application; the problems of low productivity and low activity of powdery active lime are solved.

Description

technical field [0001] The invention relates to the technical field of lime processing, in particular to a kilnless calcination process for producing powdered active lime. Background technique [0002] Activated lime (activated calcium oxide) is required for desulfurization and steelmaking fluxes in steel mills. Therefore, in today's rapid industrial development, there is a large demand for activated calcium oxide. At present, there are three main methods for producing activated calcium oxide: [0003] 1. The powder calcination process of pre-decomposition system + rotary kiln + grate cooler is adopted. In this process, the limestone is basically decomposed during pre-decomposition, and the decomposed calcium oxide is calcined again in the kiln, which may easily lead to calcium oxide. The activity is reduced, and the cooling process of the powdery material after leaving the kiln in the grate cooler is difficult to control. [0004] 2. The block calcination process of verti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10
CPCC04B2/10Y02P40/40
Inventor 张少明
Owner 合肥丰达水泥科技有限公司