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Blast furnace main runner surface mulch

A covering material and blast furnace technology, which is applied in the field of unshaped refractory materials for iron and steel metallurgy, can solve problems such as discounted service life of blast furnace tap hooks, poor isolation effect, and damage to the surface of the trench body, achieving obvious economic and social benefits. Reduce construction and maintenance costs and increase service life

Inactive Publication Date: 2016-02-10
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the isolation effect of the covering material on the surface of the blast furnace main trench that is common in the market is not good, resulting in difficulty in final slag removal, serious damage to the surface of the trench body, and high overall cost. At the same time, due to the frequent use of the blast furnace, there is not enough time to tap the blast furnace The surface of the hook groove is maintained for a long time, and some steel mills do not even protect the surface of the groove body by coating, which eventually leads to a great reduction in the service life of the blast furnace tapping hook of the steel mill

Method used

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  • Blast furnace main runner surface mulch
  • Blast furnace main runner surface mulch
  • Blast furnace main runner surface mulch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare 100Kg blast furnace main ditch ditch cover material, the raw material that adopts and weight percentage thereof are as follows:

[0026]

[0027] Among them, SiO in silica brick recycled materials 2 The content is 85wt%, the Al in the torpedo tank brick recycled material 2 o 3 The content is 65wt%, SiC is 12wt%.

[0028] Accurately weigh the above-mentioned raw materials, pour them into a mixer, mix them for 10 minutes until they are completely mixed, pack them in bags after discharge, conduct spot checks, and put them into storage to obtain the required covering material for the main trench of the blast furnace.

Embodiment 2

[0030] Prepare 100Kg blast furnace main ditch ditch cover material, the raw material that adopts and weight percentage thereof are as follows:

[0031]

[0032] Among them, SiO in silica brick recycled materials 2 The content is 88wt%, the Al in the torpedo tank brick recycled material 2 o 3 The content is 55wt%, SiC is 10wt%.

[0033] Accurately weigh the above-mentioned raw materials, pour them into a mixer, mix them for 12 minutes until they are completely mixed, pack them in bags after discharge, conduct spot checks, and put them into storage to obtain the required covering material for the main trench of the blast furnace.

Embodiment 3

[0035] Prepare 100Kg blast furnace main ditch ditch cover material, the raw material that adopts and weight percentage thereof are as follows:

[0036]

[0037]

[0038] Among them, SiO in silica brick recycled materials 2 The content is 88wt%, the Al in the torpedo tank brick recycled material 2 o 3 The content is 55wt%, SiC is 10wt%.

[0039] Accurately weigh the above-mentioned raw materials, pour them into a mixer, mix them for 12 minutes until they are completely mixed, pack them in bags after discharge, conduct spot checks, and put them into storage to obtain the required covering material for the main trench of the blast furnace.

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Abstract

The invention discloses blast furnace main runner surface mulch. The mulch comprises the following components by weight percent: 60-75wt% of silica brick recycled materials, 24-38wt% of torpedo ladle brick recycled materials and 1-2wt% of binder. Preparation processes include raw material preparation, raw material weighing and uniform mixing. The blast furnace main runner surface mulch has the characteristics of simple preparation processes, convenient equipment maintenance and construction, excellent slag isolating property, low comprehensive cost, and the like, is wide in raw material sources and has obvious economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of monolithic refractory materials used in iron and steel metallurgy, in particular to a covering material for the main trench of a blast furnace. Background technique [0002] In blast furnaces used in iron and steel metallurgy, the tapping trough is the flow channel of molten iron and slag, including the main ditch, slag skimmer, molten iron ditch, slag ditch and launder at the end of the molten iron ditch. At present, domestic blast furnaces are based on their The size of the capacity is often set with 1-4 iron hooks. Under normal production conditions, the service life of the tapping channel is about 30 days, and its material must have the following properties: (1) erosion resistance, corrosion resistance, and long life; Baking is quick and easy. The slag on the solidified surface needs to be cleaned during the tapping process of the main ditch. Since the slag sticks to the upper surface and inner wall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 郑吉红黄建坤王艳龙王俊杰
Owner 武钢集团有限公司
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