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Refining method of active metallurgical lime

A lime and active technology, which is applied in the petroleum industry, the removal of gas pollutants, and the selection of absorbent solid gas purification, etc., can solve the problems of reducing the effective CaO content, reducing the desulfurization capacity of molten steel, and increasing active lime, etc., to achieve Effects of increasing energy loss, improving fuel utilization, and improving quality

Inactive Publication Date: 2018-06-22
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

However, coke oven gas is used as fuel, and coke oven gas contains H 2 S and organic sulfur such as carbon disulfide, H 2 The combustion of S and organic sulfur will increase the content of S in active lime, and the increase of S content will reduce the effective CaO content, thereby reducing the desulfurization ability of molten steel and increasing consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for refining active metallurgical lime, comprising the following steps:

[0032] S1. Pretreatment: Clean, remove impurities, dry, crush and classify high-quality limestone raw materials with a calcium content greater than 53% and a mass fraction of silica less than 1% to obtain limestone with a particle size of 20-40mm Powder.

[0033] In the limestone powder, the proportion of particle diameters greater than 40mm is less than 5%, the proportion of particle diameters less than 20mm is less than 5%, and the proportion of particle diameters less than 10mm is less than 1%.

[0034] S2. Preheating treatment: Preheat the limestone powder, and use a suspension preheater to preheat the limestone powder. First, preheat the suspension preheater for 25 minutes, and then start feeding, so that the surface and center of the limestone powder The temperature reached 780°C.

[0035] The preheated limestone powder is sent to a decomposition furnace for decomposition and then...

Embodiment 2

[0041] A method for refining active metallurgical lime, comprising the following steps:

[0042] In the calcination process of step S3, the preheated limestone powder is sent to the rotary kiln for calcination, and the calcination temperature is 1180° C., and other steps are the same as in Example 1.

Embodiment 3

[0044] A method for refining active metallurgical lime, comprising the following steps:

[0045] In step S3 calcination process, the preheated limestone powder is sent to the rotary kiln for calcination, the calcination temperature is 1150° C., other steps are the same as in Example 1.

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Abstract

The invention provides a refining method of active metallurgical lime and relates to the field of production and preparation of lime. The method specifically comprises pretreatment, preheating treatment, calcination treatment and cooling treatment. According to the refining method of the active metallurgical lime, by controlling CaO content and granularity of raw materials, calcination temperatureof a reaction process and fuel, activity of the active lime is improved, sulfur content is reduced, and quality of the active lime is improved.

Description

technical field [0001] The invention relates to the field of lime production and preparation, in particular to a refining method of active metallurgical lime. Background technique [0002] Lime (quick lime) is obtained by calcining limestone, chalk, shells, etc., and has a wide range of applications in metallurgy, construction, chemical industry, environment, agriculture and other fields. Lime is white block or powder, with low hardness, Mohs hardness between 2-3, according to its reactivity, it can be divided into four categories: activated lime, lightly burned lime, moderately burned lime, and overburned lime. Activated lime is a kind of light burnt lime with good quality. It has the advantages of high porosity, large specific surface area, good reactivity, low impurities, uniform particle size and certain strength. The activity of activated lime is generally above 300ml ( 4mol / L HCl, 40±1°C, 10min hydrochloric acid titration value). CaO content and activity are importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10C10K1/20C10K1/26C10K1/32C10K1/00
CPCC04B2/10C04B2/108C10K1/004C10K1/20C10K1/26C10K1/32
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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