High thermal shock abrasive brick for dry quenched coke oven chute pillar and manufacture method

A technology of a CDQ oven and a production method, which are applied in the field of high thermal shock wear-resistant bricks for a CDQ oven ramp column, can solve the problem that the thermal shock stability, high temperature flexural strength and normal temperature compressive strength cannot be adapted to the CDQ oven The requirements of chute working conditions, the poor physical properties of mullite-silicon carbide refractory bricks, and the limitation of the production capacity of the CDQ system have achieved the effect of excellent performance indicators, strong wear resistance, and good thermal shock resistance.
CN1927767AInactive Publication Date: 2007-03-14武汉钢铁有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
武汉钢铁有限公司
Publication Date
2007-03-14
Estimated Expiration
Not applicable · inactive patent
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Abstract

The present invention discloses one kind of abrasive brick with high thermal shock resistance for use in dry quenching coke oven and its making process. The abrasive brick is made with the materials including silicon carbide 62-80 wt%, silicon nitride 17-35 wt%, inorganic adhesive 0.4-3 wt%, lanthanide oxide 0.1-0.8 wt% and ferric oxide impurity less than 1.0 wt%, and has high thermal shock stability and normal temperature pressure strength higher than 120 MPa. The making process includes the steps of mixing all the materials, pressing at 75-125 N / sq mm pressure to form adobe, stoving the adobe at 100-300 deg.c and final sintering in a kiln at 1380-1420 deg.c under the protection of nitrogen. The abrasive brick with high thermal shock resistance has long service life.
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Description

technical field

[0001] The invention relates to a material for manufacturing a CDQ coke oven chute column used in iron and steel smelting enterprises, in particular to a high thermal shock wear-resistant brick for a CDQ coke oven chute column and a manufacturing method thereof. Background technique

[0002] CDQ is a coke quenching method used by iron and steel smelting enterprises to cool red coke with inert gas in CDQ ovens. The method can make full use of the sensible heat of red coke, significantly improve the quality of coke, effectively save energy, greatly reduce the emission of harmful substances, and maintain the atmospheric environment. At present, in the domestic large-scale CDQ system with a processing capacity of more than 120t / h, the restrictive link that affects the production capacity is the damage of the column of the CDQ coke oven chute. Taking the CDQ system of Wuhan Iron and Steel (Group) Company as an example, the coke processin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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