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Castable for main ditch of blast furnace tapping ditch

A blast furnace tapping and castable technology, which is applied in the field of refractory materials, can solve the problems of iron channel material damage, iron channel erosion resistance, etc., and achieve the effects of good exhaust performance, improved scourability, and reduced damage

Active Publication Date: 2022-04-26
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a castable for the main ditch of the blast furnace tapping trough, which solves the rapid temperature change in the preparation process of the existing blast furnace tapping ditch main ditch castable that exists in the prior art by improving and increasing the raw material composition and its ratio The damage to the iron channel material and the erosion resistance of the iron channel against high temperature molten iron

Method used

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  • Castable for main ditch of blast furnace tapping ditch

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a castable for the main ditch of a blast furnace tapping trough, and its raw material components and specific weight parts are as follows:

[0024] 20 parts of bauxite particles, wherein, particle size is 15-8mm10 parts, particle size is 8-5mm10 parts;

[0025] 38 parts of brown corundum, including 36 parts of fused brown corundum particles, including 12 parts with a particle size of 5-3mm, 12 parts with a particle size of 3-1mm, and 12 parts with a particle size of 1-0mm; 2 parts of fused brown corundum fine powder, with a particle size of 200 head;

[0026] 25 parts of silicon carbide, wherein, the particle size of silicon carbide particles is 1-0mm13 parts, the particle size of silicon carbide fine powder is 12 parts of 325 mesh;

[0027] 10 parts of alumina micropowder;

[0028] 2 parts high alumina cement;

[0029] Carbon 3 parts;

[0030] Antioxidant: 0.1 parts of metal silicon powder;

[0031] Dispersant: 0.4 parts of sodium hexameta...

Embodiment 2

[0036] This embodiment provides a castable for the main ditch of a blast furnace tapping trough, and its raw material components and specific weight parts are as follows:

[0037] 25 parts of bauxite particles, wherein, particle size is 15-8mm15 parts, particle size is 8-5mm10 parts;

[0038] 38 parts of brown corundum, including 34 parts of fused brown corundum particles, including 12 parts with a particle size of 5-3mm, 12 parts with a particle size of 3-1mm, and 10 parts with a particle size of 1-0mm; 4 parts of fused brown corundum fine powder, with a particle size of 200 head;

[0039] 20 parts of silicon carbide, wherein silicon carbide particle size is 1-0mm 10 parts, silicon carbide fine powder particle size is 325 mesh 10 parts;

[0040] 10 parts of alumina micropowder;

[0041] 2 parts high alumina cement;

[0042] Carbon 3 parts;

[0043] Antioxidant: 0.3 parts of boron carbide;

[0044] Dispersant: 0.4 parts of sodium tripolyphosphate;

[0045] Calcium nitrid...

Embodiment 3

[0049] This embodiment provides a castable for the main ditch of a blast furnace tapping trough, and its raw material components and specific weight parts are as follows:

[0050] 29 parts of bauxite particles, wherein, the particle size is 15-8mm15 parts, and the particle size is 8-5mm14 parts;

[0051] 36 parts of brown corundum, including 30 parts of fused brown corundum particles, including 10 parts of particle size 5-3mm, 10 parts of particle size 3-1mm, and 10 parts of particle size 1-0mm; 6 parts of fused brown corundum fine powder, particle size of 200 head;

[0052] 18 parts of silicon carbide, wherein silicon carbide particle size is 1-0mm 8 parts, silicon carbide fine powder particle size is 325 mesh 10 parts;

[0053] 10 parts of alumina micropowder;

[0054] 2 parts high alumina cement;

[0055] Carbon 3 parts;

[0056] Antioxidant: boron carbide 1 part;

[0057] Dispersant: 0.4 parts of sodium tripolyphosphate;

[0058] Calcium nitride fine powder 0.5 part;...

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Abstract

The invention relates to the technical field of refractory materials, in particular to a castable for the main ditch of a blast furnace tapping trough, which comprises: 20-30 parts of alumina particles, 30-40 parts of brown corundum, and 10 parts of silicon carbide ‑25 parts, 5 parts‑10 parts of alumina fine powder, 1 part‑4 part of high alumina cement, 1 part‑4 part of carbon, 0 part‑3 part of calcium nitride fine powder, 0.1 part‑0.5 part of dispersant, 0.1-1 part of oxidant, 4.5-4.8 parts of water, by changing the composition of raw materials and their proportions to solve the problems existing in the prior art. The damage to the iron trough material caused by the sudden change of temperature and the erosion resistance of the iron trough against high temperature molten iron.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a casting material for the main ditch of a blast furnace tapping ditch. Background technique [0002] The blast furnace tapping channel is a channel to guide the high-temperature molten iron and slag in the blast furnace. The blast furnace tapping channel system includes a main channel, a branch channel and a slag channel. The main channel is a common channel for the high-temperature slag-iron mixture flowing out of the blast furnace. A slag skimmer is designed at the rear of the main ditch. When the high-temperature slag-iron mixture flowing out of the blast furnace reaches the slag shield, due to the difference in volume density, it is divided into upper and lower layers in the main ditch, namely, the upper layer of molten slag and the lower layer of molten iron. , the slag with a relatively small volume density overflows into the slag ditch from above, while the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B35/101C04B35/63
CPCC04B35/101C04B35/6313C04B35/6303C04B38/02C04B2235/3826C04B2235/422C04B2235/3852C04B2235/428C04B2235/3821C04B2235/5427C04B2235/77C04B2235/96
Inventor 徐双王佳宁崔志强颜浩赵伟任林刘靖轩
Owner 北京利尔高温材料股份有限公司
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