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Tap hole clay for recycled material high blast furnace and preparation method thereof

A technology of blast furnace and blast furnace clay, which is applied in the field of blast furnace blast furnace clay and its preparation, can solve the problems of consumption, large mineral resources, electric energy, and power consumption, and achieve the effects of saving mineral resources, good workability, and energy saving

Active Publication Date: 2011-08-31
通化耐博新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the production of 1 ton of dense raw materials consumes thousands of kilowatt-hours of electricity
It can be seen that the production of blast furnace mud for iron plugging consumes a large amount of mineral resources and electric energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Blast furnace mud for recycled materials is prepared according to the following requirements:

[0020] Recycled material 3-0mm 446kg

[0021] Clay 0-0.8mm 130kg

[0022] Sericite 0-0.088mm 22kg

[0023] Bitumen 22kg

[0024] Tar 100kg

[0025] (2) Pour the above powder into the wheel mill and mix for 10 minutes, then add 85kg of tar, mix for 25 minutes, then add 15kg of tar and mix for 15 minutes. bag to spare.

[0026] (3) This gun clay is used for 1000-1800m 3 In the blast furnace, the blast furnace mud is made into a 40×40×160mm sample and the physical performance indicators for testing are:

[0027] 300℃×24h bulk density: 1.8g / cm 3 , compressive strength 14MPa;

[0028] 1350℃×24h Bulk density: 1.75g / cm 3 , compressive strength 20MPa;

[0029] The line change after burning at 1350°C is -1.8%;

[0030] 1350℃×1h high temperature flexural strength is 2.1MPa.

Embodiment 2

[0032] (1) Blast furnace mud for recycled materials shall be batched according to the following requirements

[0033] Recycled material 3-0mm 382kg

[0034] Clay 0-0.8mm 130kg

[0035] Sericite 0-0.088mm 25kg

[0036] Bitumen 25kg

[0037] Tar 115kg

[0038] (2) Pour the above powder into the wheel mill and mix for 8 minutes, then add 98kg of tar, mix for 30 minutes, then add 17kg of tar and mix for 20 minutes, and the material temperature is 50°C during the mixing. Then the material is extruded to form the mud and packed into bags for later use.

[0039] (3) The physical performance indicators of the clay made into a 40×40×160mm sample are as follows:

[0040] 300℃×24h bulk density: 2.1g / cm3, compressive strength 18MPa;

[0041] 1350℃×24h bulk density: 2.0g / cm3, compressive strength 25MPa;

[0042] Line change after burning at 1350°C -2.0%;

[0043] 1350℃×1h high temperature flexural strength is 2.3MPa.

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Abstract

The invention belongs to the field of blast furnace iron making and particularly relates to tap hole clay for a blast furnace which replaces the conventional dense raw materials and coke powder by recycled materials and a preparation method thereof. The formula of the tap hole clay comprises the following components in percentage by weight: 55 to 70 percent of recycled material, 14 to 23 percent of clay, 2 to 5 percent of asphalt, 2 to 5 percent of sericite and 12 to 16 percent of binding agent. The dense raw materials such as dense corundum, high-alumina aggregate, an SiC raw material and the like and the coke powder are replaced by the recycled materials, so that mineral resources are saved, a large amount of energy is saved, waste discharge can be reduced effectively, the production cost of the tap hole clay is lowered and remarkable economic and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of blast furnace ironmaking, and in particular relates to blast furnace clay which uses recycled materials to replace traditional dense raw materials and coke powder and a preparation method thereof. technical background [0002] Blast furnace is an important equipment for smelting pig iron, and blast furnace smelting and plugging must use gun mud. When producing gun clay, 40-60% of dense raw materials are required, such as fused corundum and high-alumina aggregate, 10%-15% of silicon carbide, and 10%-20% of coke powder. For example, Chinese patent ZL03117339.X discloses foaming mud for blast furnaces. The components of the invention are 3-9% by weight of brown corundum, 16-35% of fused mullite, 7-11% of SiC, and 10-15% of coke powder. For example, Chinese patent CN1840507 discloses anhydrous taphole mud for blast furnace tapholes. The ratio of the above three raw materials in this invention is: brown corundum 35-40%...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 邵建秋魏宇珩郝文正
Owner 通化耐博新材料股份有限公司
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