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Highly regenerative fireproof ball

A refractory ball and heat storage technology, applied in brick blast furnaces and other directions, can solve problems such as affecting heat storage performance, serious slagging, blocking air ducts, etc. blocking effect

Inactive Publication Date: 2004-08-18
郑州豫兴氮氧结合耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the heat storage refractory ball used in the hot blast stove has a certain relationship with the density and hardness of the refractory ball besides its own composition and proportion, and the existing refractory ball Most of them are made of mixed materials, plus soft clay as a binder, and are made by traditional manual methods. The density and hardness of the refractory balls often have a certain gap with the performance required in production. The pebble bed is softened and bonded into a slag block, and the slagging is serious, which affects the heat storage performance
At the same time, due to the high pressure of the upper quenching hot air and the extrusion of the upper part, the refractory balls in the lower part are easily crushed or deformed, often blocking the air duct, and the hot air cannot be sent to the blast furnace, which affects the production of the blast furnace. Therefore, maintenance and replacement are often required. Balls and other work, affecting the normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with an embodiment.

[0014] Al 2 o 3 ≥70% high-alumina bauxite, crushed into particles with a particle size of 2-4mm, weighed 60 grams as aggregate, and then selected Al 2 o 3 ≥85% bauxite, rolled into a fine powder with a particle size of 300 mesh, weighed 30 grams as filler and weighed Al-containing 2 o 3 10 grams of ≥36% white wool clay is used as a high-temperature binder, and then the three are mixed together, and 3 grams of pulp binder with a concentration ratio of 1.25 are added, mixed with the above raw materials, and filled into the mold by 24 tons of pressure. The machine is used for pressure molding, and after molding, it is roasted at a high temperature of 1450°C to obtain the finished product.

[0015] The test results of the high heat storage refractory ball of the present invention are as follows: the density increases from 2.3 g / cm3 to 2.6 g / cm3, the strength increases from 12,0...

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PUM

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Abstract

The heat accumulating refractory ball consists of high-aluminum alumina as aggregate 58-62 wt%, refined bauxite as stuffing 29-31 wt%, high-grade white clay as high temperature adhesive 9-11 wt% and paper pulp as adhesive 3 wt%. The high-aluminum alumina contains Al2O3 not less than 70 % and has granular size of 2-4 mm, the refined bauxite contains Al2O3 not less than 85 % and has granular size of 300 mesh, and the while clay contains Al2O3 not less than 36 %. The refractory ball of the present invention has good heat accumulating performance, bulk density of 2.6 g / cu cm and strength of 25 KN each ball, has less scaling and breaking, no jamming of ventilation channel and high heat utilization rate.

Description

technical field [0001] The invention relates to a heat storage material in an ironmaking hot blast stove, in particular to a high heat storage refractory ball. Background technique [0002] At present, the heat storage refractory ball used in the hot blast stove has a certain relationship with the density and hardness of the refractory ball besides its own composition and proportion, and the existing refractory ball Most of them are made of mixed materials, plus soft clay as a binder, and are made by traditional manual methods. The density and hardness of the refractory balls often have a certain gap with the performance required in production. The pebble bed is softened and bonded into a slag block, and the slagging is serious, which affects the heat storage performance. At the same time, due to the high pressure of the upper quenching hot air and the extrusion of the upper part, the refractory balls in the lower part are easily crushed or deformed, often blocking the air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C21B9/02
Inventor 刘世聚周成林高万仓崔铁山周福辰
Owner 郑州豫兴氮氧结合耐火材料有限公司
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