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A kind of passivation lime reverse passivation process

A technology of lime technology, applied in the field of passivation lime reverse passivation technology, can solve the problems that are not conducive to product transportation, storage, pneumatic transportation, outstanding water absorption characteristics, etc., to achieve improved passivation efficiency, good passivation effect, Good effect of product use

Active Publication Date: 2020-11-06
ANYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Quicklime has typical water absorption characteristics, which is extremely unfavorable for product transportation and storage. Fine and fine particles have a larger specific surface area, and are not conducive to pneumatic conveying due to their outstanding moisture absorption and water absorption characteristics.

Method used

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  • A kind of passivation lime reverse passivation process

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Embodiment Construction

[0051] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0052] Such as figure 1 As shown, a passivated lime reverse passivation process, which includes quicklime grinding, two-fluid atomization injection, reverse injection, final passivation steps,

[0053] 1), quicklime grinding

[0054] The grinding of quicklime is composed of a mill-air separation system, and the specific process features are as follows:

[0055](1) Select raw lime with a particle size of 20-40mm, and send it to the Raymond mill for grinding through the feeding and conveying mechanism; select the excitation electric vibration feeder for feeding, the frequency is adjustable from 0-50Hz, and the feeding amount is 0-12t / h;

[0056] (2) Set the frequency of the mill separator to be adjustable from 0-50Hz, the passing rate of 325 mes...

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Abstract

The invention discloses a passivated lime reverse passivating process. The passivated lime reverse passivating process comprises the steps of quicklime grinding, double-fluid atomization injection, reverse injection and tail section passivation. The passivated lime reverse passivating process improves the dispersibility of passivating agents and the surface passivating uniformity of quicklime, reduces the consumption of the passivating agents, and improves the passivating efficiency; the injection direction of the passivating agents is opposite to the flowing direction of material particles; through reverse injection, the material particles and the passivating agents are in fuller interface mixing and contact in a suspension environment, so that the passivating effect on quicklime particles or fine particles is improved, and the passivating effect is excellent; materials are independently grinded; tail sections of finished products are passivated; and the grinding operation is separated from the passivating process, so that the product use effect is excellent, and the quality is stable.

Description

technical field [0001] The invention relates to the technical field of lime passivation, in particular to a passivated lime reverse passivation process. Background technique [0002] As a basic industrial raw material, quicklime has a very wide range of applications in the iron and steel metallurgy and environmental protection industries. [0003] Calcium-magnesium composite injection technology is a mature desulfurization process widely used in the molten iron pre-desulfurization treatment system before converter steelmaking. Quicklime is used as the calcium component of calcium-magnesium composite injection powder. The function of the hot metal pre-desulfurization system is very important. [0004] Quicklime has typical water absorption characteristics, which is extremely unfavorable to the transportation and storage of products. Fine and fine particles have a larger specific surface area, which is not conducive to pneumatic transportation due to their outstanding moistur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/02
CPCC21C1/025
Inventor 朱世峰李军希程国强朱潇凡蔡可兵张利彬郭永涛段红星许小云
Owner ANYANG IRON & STEEL
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