Method for granulating powdery active lime, special equipment and midbody

A technology of active lime and granulation equipment, which is applied in the field of granulation of powdered active lime for ironmaking and special equipment for powdered active lime granulation, which can solve problems such as waste of resources

Inactive Publication Date: 2010-06-09
湖北省通山县通力镁业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, 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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  • Method for granulating powdery active lime, special equipment and midbody
  • Method for granulating powdery active lime, special equipment and midbody
  • Method for granulating powdery active lime, special equipment and midbody

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 is introduced into the crusher for crushing, and after screening, it becomes active lime pellets of different particle size grades required by users, which are 14 mesh, 18 mesh, 28 mesh, 35 mesh and other particle sizes. The detected activity is 350ml-370ml, and the calcium oxide content is 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 is introduced into the crusher for crushing, and after screening, it becomes active lime pellets of different particle size grades required by users, which are 14 mesh, 18 mesh, 28 mesh, 35 mesh and other particle sizes. 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 method for granulating powdery active lime, a device and a midbody, in particular to a technology for granulating active lime for smelting steel. The invention provides a technology for processing powdery active lime powder into granules. The technology reduces the cost, is relatively easy for production, does not add any additive and can keep the calcium oxide content and the activity of the active lime powder after granulation constant, enable the granulated active lime to maintain certain mechanical strength and achieve the aim of fully utilizing materials. Meanwhile, the invention also provides special equipment which has simple structure and molds the powdery active lime in one step. The powdery active lime is pressed into strip blocks by an extruding machine, and the strip blocks are pulverized by a crusher and screened into the active lime with needed granularity.

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 special equipment for granulating powdered active lime. Background technique [0003] Active lime is the main raw material of desulfurizer used in steelmaking at present. When using 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. At present, the existing technology can only make block active lime 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, It can only be discarded. In this way, a large part of the high-quality active lime specially produced for steelmaking can only be treated as common lime, resulting in a was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/20C01F11/02C21C7/064
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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