Blast furnace stemming prepared from regenerated refractories and preparation method thereof

A technology for refractory materials and blast furnaces, applied in the field of blast furnace clay, can solve the problems of high consumption, damage to taphole clay, and large resource consumption, and achieve the effects of reducing waste discharge, reducing consumption of refractory materials, and reducing production costs.

Inactive Publication Date: 2015-04-01
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the blast furnace smelting process, the taphole mud has a service life of about two to three hours each time, and it needs to go through several cycles of opening and filling every day. Under the erosion and erosion of high-temperature molten iron and slag, the taphole mud is continuously It is damaged and eventually forms slag, which is a one-time consumable material. It needs to consume a large amount of mineral resources such as bauxite, silicon carbide, and coke to prepare gun clay, which consumes a lot of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] One for 1800m 3 Blast furnace mud, including raw materials and external binders, raw materials include: 50% recycled refractories, 5% corundum, 10% silicon carbide, 20% clay, 5% pitch, 10% coke; the external binder is anthracene Oil, consumption is 20% of raw material weight. Wherein, the weight ratio of the regenerated refractory material with a particle size of 1-3 mm to the regenerated refractory material with a particle size of 0-1 mm is 5:3. The weight ratio of Guangxi white clay to ring clay is 1:2. The weight ratio of high temperature asphalt to modified asphalt is 2:3.

[0027] Preparation method: according to the proportion of raw materials, put recycled refractory materials, corundum, silicon carbide, clay, asphalt, and coke into the mixer, pre-mix for 5 minutes, add 95% of the total amount of anthracene oil, and mix for 30 minutes. Detect the Masia value of the product, if it is higher than 1400KPa, gradually add the remaining 5% of anthracene oil to adjus...

Embodiment 2

[0029] One for 2500m 3 Blast furnace clay, including raw materials and external binders, raw materials include: 45% recycled refractories, 6% corundum, 12% silicon carbide, 16% clay, 6% pitch, 15% coke; the external binder is tar , consumption is 18% of raw material weight. Wherein, the weight ratio of the regenerated refractory material with a particle size of 1-3 mm to the regenerated refractory material with a particle size of 0-1 mm is 5:4. The weight ratio of Guangxi white clay to ring clay is 2:1. The weight ratio of high temperature asphalt to modified asphalt is 3:2.

[0030] Preparation method: according to the proportion of raw materials, put recycled refractory materials, corundum, silicon carbide, clay, asphalt, and coke into the mixer, pre-mix for 5 minutes, add 95% of the total amount of tar, and mix for 30 minutes. The Masha value of the product is higher than 1400KPa, gradually add the remaining 5% tar, and the Masha value is controlled at 800KPa; after mixi...

Embodiment 3

[0032] One for 3200m 3 Blast furnace mud, including raw materials and external binder, the raw materials include: 37% recycled refractory material, 8% corundum, 17% silicon carbide, 15% clay, 7% pitch, 16% coke; the external binder is anthracene The mixture of oil and tar, consumption is 16% of raw material weight. Wherein, the weight ratio of the regenerated refractory material with a particle size of 1-3 mm to the regenerated refractory material with a particle size of 0-1 mm is 5:3. The weight ratio of Guangxi white clay to ring clay is 2:1. The weight ratio of high temperature asphalt to modified asphalt is 2:3.

[0033] Preparation method: according to the proportion of raw materials, put recycled refractory materials, corundum, silicon carbide, clay, asphalt, and coke into the mixing mill, pre-mix for 5 minutes, add 95% of the total amount of the mixture of anthracene oil and tar, and mix and grind After 30 minutes, check the Maxia value of the product, which is highe...

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Abstract

The invention discloses a blast furnace stemming prepared from regenerated refractories and a preparation method thereof. The blast furnace stemming is prepared from 30-50% of regenerated refractory, 5-10% of corundum, 10-20% of silicon carbide, 10-20% of clay, 5-8% of asphalt and 10-18% of coke. The additional binder of the blast furnace stemming is one or mixture of both of anthracene oil and tar, and accounts for 10-20 wt% of all the raw materials. The preparation method comprises the following steps: putting the raw materials into a mixing mill, premixing for 5 minutes, adding 95% of the additional binder, milling for 30 minutes, detecting the Marshall value, gradually adding the rest of additional binder until the Marshall value is acceptable, milling for 10 minutes, discharging, and forming with an extruder. The blast furnace stemming can lower the consumption of alumina, corundum, silicon carbide and other mineral resources; and the used refractories can be recovered, thereby lowering the waste discharge, promoting the cyclic utilization of resources, enhancing the blast-furnace smelting efficiency and lowering the stokehole refractory consumption.

Description

technical field [0001] The invention relates to blast furnace clay, in particular to a blast furnace clay prepared by using regenerated refractory materials and a preparation method thereof. Background technique [0002] Gun clay is a kind of unshaped refractory material used to block the iron hole of ironmaking blast furnace. Its composition can be divided into two parts: refractory aggregate and binder. The main raw materials of water gun mud are clay powder, broken clay refractory brick particles, and coke powder, and asphalt, high-alumina bauxite, silicon carbide, etc. are appropriately added, and water is used as a binder. Commonly used raw materials for anhydrous clay are generally corundum, high alumina bauxite, silicon carbide, clay and coke powder, etc. In order to improve the performance of the clay, increase its strength and corrosion resistance, metal silicon, metal aluminum, and sericite powder have begun to be used , ferrosilicon nitride and other raw material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B09B3/00
Inventor 魏斌何见林雷中兴杨德波孙戎
Owner 武钢集团有限公司
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