Compound desulfurizer

A desulfurization agent and granulation technology, which is applied in the field of granulation of powdered active lime for ironmaking, can solve the problem of waste of resources and other problems.

Inactive Publication Date: 2011-09-28
湖北省通山县通力镁业有限责任公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] Active lime is currently the main raw material for desulfurization agents used in steelmaking. When using the KR method for desulfurization in steelmaking, it is required to use highly active granular active lime with a particle size of 0.5-1.6mm and a certain mechanical strength. Currently, the existing technology can only The blocky high-activity active lime lime is made into finished products with a particle size of 0.5-1.6mm, and the yield is about 30%-40%. Although those lime powders smaller than 0.5mm have the same CaO content and activity, they can only Abandoned, this has resulted in a large part of the high-quality active lime specially produced for steelmaking can only be treated as ordinary lime, resulting in a waste of resources

Method used

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  • Compound desulfurizer
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 The active lime with activity degree of 350ml-370ml and calcium oxide content of 95%-98% is added into the hopper with quantitative feeder 1, and powdered active lime is pressed into the flaking unit through forced feeder 2. The strip-shaped active lime enters the crusher for crushing, and is classified and screened into different particle size grades required by the user, which are respectively 14 mesh, 18 mesh, 28 mesh, 35 mesh and other particle sizes of active lime pellets. The detected active lime has an activity of 350ml-370ml and a calcium oxide content of 95%-98%.

Embodiment 2

[0032] Example 2 The active lime with an activity degree of 370ml-400ml and a calcium oxide content of 95%-98% is added to the hopper with a quantitative feeder 1, and the powdered active lime is pressed into the flaking unit through a forced feeder 2, The strip-shaped active lime enters the crusher for crushing, and is classified into different particle size grades required by the user through the grading screen, which are active lime aggregates with particle sizes of 14 mesh, 18 mesh, 28 mesh, and 35 mesh. The detected activity is 370ml-400ml, and the calcium oxide content is 95%-98%.

Embodiment 3

[0033] Embodiment 3 is the same as above, the activated lime with activity degree of 400ml-450ml and calcium oxide content of 95%-98% is made into granular activated lime with 400ml-450ml and calcium oxide content of 95%-98%.

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Abstract

The invention relates to a compound desulfurizer, in particular to a granulating technology of the compound desulfurizer for steel-making. The granulating technology of the compound desulfurizer comprises the steps: a powdered desulfurizer is extruded to be strips by an extruder; the strips are crushed by a crusher; and then the crushed strips are screened to classify to obtain the compound desulfurizer with required granularity. By use of the granulating technology, not only the granulated compound desulfurizer can maintain a certain mechanical strength, but also the powdered desulfurizer can be fully utilized so as to reach the purpose of making full use of materials.

Description

technical field [0001] The invention relates to the granulation technology of lime, in particular to the granulation technology of powdered active lime for ironmaking (steel). [0002] The invention also relates to the exclusive equipment for the method of granulating powdered active lime. Background technique [0003] Active lime is currently the main raw material for desulfurizers used in steelmaking. When using the KR method for desulfurization in steelmaking, it is required to use highly active granular active lime with a particle size of 0.5-1.6 mm and a certain mechanical strength. The current existing technology can only The blocky high-activity active lime lime is made into finished products with a particle size of 0.5-1.6mm, and the yield is about 30%-40%. Although those lime powders smaller than 0.5mm have the same CaO content and activity, they can only Abandon it, so that a large part of the high-quality active lime specially produced for steelmaking can only be...

Claims

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Application Information

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IPC IPC(8): B01J2/22B01D53/50
Inventor 唐铁石李名顺夏敬事郭长戍
Owner 湖北省通山县通力镁业有限责任公司
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