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Ramming material for blast furnace trough

A blast furnace tapping and ramming material technology, applied in the field of unshaped refractories, can solve the problems of ramming material bursting structure, damage to workers' health, affecting structural strength, etc., achieve large bulk density, improve normal temperature strength, and reduce toxic gases and the effect of toxic fumes

Inactive Publication Date: 2017-11-24
常州市瑞泰物资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: traditional ramming materials use asphalt or coal tar as a binder, which belongs to complex thick aromatic hydrocarbons, and when the temperature is slightly higher, it will emit toxic gas and yellow smoke, which will have an impact on the site environment and damage The health of the workers, and the rapid gasification of the moisture in the binder after heating can easily cause the ramming material to burst and cause damage to the structure and affect the structural strength. A blast furnace tapping trough ramming material is provided.

Method used

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  • Ramming material for blast furnace trough

Examples

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example 1

[0022] First, in parts by weight, add 10 parts of brown fused alumina with a mesh size of 6 mesh, 10 parts of brown fused alumina with a mesh size of 30 mesh, 10 parts of brown fused alumina with a mesh size of 70 mesh, and 10 parts of brown fused alumina with a mesh size of 100 mesh in the mixer. Target brown fused alumina, 20 parts of brown fused alumina with a mesh size of 180 mesh, stirred and mixed for 2 hours at a rotating speed of 300r / min, and discharged to obtain compound brown fused alumina. 10 parts of dense corundum with a mesh of 20 mesh, 10 parts of dense corundum with a mesh of 60 mesh, 10 parts of dense corundum with a mesh of 90 mesh, 10 parts of dense corundum with a mesh of 150 mesh, 20 parts of dense corundum with a mesh of 325 mesh, Stir and mix for 2 hours at a rotating speed of 300r / min, and discharge to obtain compound dense corundum. Then, in parts by weight, add 20 parts of sodium silicate, 40 parts of calcium silicate, and 8 parts of Aluminum dihydro...

example 2

[0024]First, according to the number of parts by weight, 15 parts of brown fused alumina with a mesh size of 13 mesh, 13 parts of brown corundum with a mesh size of 45 mesh, 20 parts of brown corundum with a mesh size of 80 mesh, and 13 parts of brown corundum with a mesh size of 125 mesh are sequentially added to the mixer. Target brown corundum, 30 parts of brown corundum with a mesh size of 240 mesh, under the condition of a rotating speed of 400r / min, stir and mix for 3 hours, and discharge the material to obtain compound brown corundum, and then add it to the mixer in order according to the number of parts by weight 15 copies of dense corundum with a mesh of 25 mesh, 13 copies of dense corundum with a mesh of 65 mesh, 20 copies of dense corundum with a mesh of 95 mesh, 13 copies of dense corundum with a mesh of 165 mesh, 30 copies of dense corundum with a mesh of 410 mesh, Stir and mix for 3 hours at a rotating speed of 400r / min, and discharge to obtain compound dense coru...

example 3

[0026] First, in parts by weight, add 20 parts of brown fused alumina with a mesh size of 20 mesh, 15 parts of brown fused alumina with a mesh size of 60 mesh, 30 parts of brown corundum with a mesh size of 90 mesh, and 15 parts of brown corundum with a mesh size of 90 mesh in the mixer. Target brown corundum, 40 parts of brown corundum with a mesh size of 300 mesh, stirred and mixed for 4 hours under the condition of a rotating speed of 500r / min, and discharged to obtain compound brown corundum. 20 parts of dense corundum with a mesh size of 30 mesh, 15 parts of dense corundum with a mesh size of 70 mesh, 30 parts of dense corundum with a mesh size of 100 mesh, 15 parts of dense corundum with a mesh size of 180 mesh, and 40 parts of dense corundum with a mesh size of 500 mesh. Stir and mix for 4 hours at a rotating speed of 500r / min, and discharge to obtain compound dense corundum. Then, in parts by weight, add 40 parts of sodium silicate, 60 parts of calcium silicate, and 10 ...

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Abstract

The invention belongs to the technical field of amorphous refractory materials, and particularly relates to a ramming material for a blast furnace trough. Brown fused alumina with different mesh numbers is compounded to prepare compound brown fused alumina, compact corundum with different mesh numbers is compounded to prepare compound compact corundum, and the compound brown fused alumina, the compound compact corundum and a stone powder binder are mixed and grinded to prepare a ball milled material; the ball milled material is mixed with nano silicon dioxide and nano aluminum oxide by stirring to obtain a mixture I, and then the mixture I is added with a carbon nitride compound and C5 petroleum resin for being mixed and discharged, so that the ramming material for the blast furnace trough can be obtained. The ramming material prepared is relatively high in high-temperature structural strength, is great in volume density, effectively avoids a bursting phenomenon of the ramming material; complex thick aromatic hydrocarbon substances such as asphalt and coal tar are not used, poisonous gas and smoke are prevented from being generated in a using process, and harm on health of workers and working environment is avoided; moreover, the ramming material is relatively good in oxidization resistance, so that the service life of a trough casting is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of unshaped refractory materials, and in particular relates to a blast furnace tapping trough ramming material. Background technique [0002] With the development of large-scale and high-efficiency blast furnaces, the tapping time of blast furnaces is extended and the flow rate of slag and iron is increased, resulting in increasingly harsh conditions for the use of blast furnace tapping troughs and accelerating the erosion of iron trough linings. Blast furnace tapping trough is a channel for guiding high-temperature molten iron and slag, including main trough, iron trough, slag trough and slag skimmer, etc. The life span of the tap trough is directly related to the normal production rate of the blast furnace. [0003] Usually, the ramming material used in blast furnace tapping trough is mostly Al 2 o 3 -SiC-C series, made of dense corundum, sub-white corundum, brown corundum, super high-alumina bauxite cl...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 陈刚许蘅潘宏梅
Owner 常州市瑞泰物资有限公司
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