Blast-furnace taphole stemming prepared from ferrotitanium slag and preparation method of blast-furnace taphole

A blast furnace tapping and ferrotitanium slag technology is applied in the field of refractory materials, which can solve the problems of good corrosion resistance and high service life of the titanium-iron type tap hole taphole mud, so as to improve the blast furnace smelting efficiency, reduce the consumption of refractory materials, and reduce the expansion rate. Effect of Pore Rate

Inactive Publication Date: 2015-03-25
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

[0004] The purpose of the present invention is to provide a blast furnace taphole clay prepared by using ferro-titanium slag and its preparation method according to the deficiencies of the prior art. The present invention can improve the utilization rate of ferro-titanium slag resources and effectively solve the problems of waste of resources and environmental pollution , the prepared ferro-titanium taphole mud has good corrosion resistance and long service life

Method used

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  • Blast-furnace taphole stemming prepared from ferrotitanium slag and preparation method of blast-furnace taphole
  • Blast-furnace taphole stemming prepared from ferrotitanium slag and preparation method of blast-furnace taphole
  • Blast-furnace taphole stemming prepared from ferrotitanium slag and preparation method of blast-furnace taphole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A 1080m ferro-titanium slag 3 The blast furnace tap hole clay 1 is composed of the following components by weight percentage:

[0016]

[0017] The blast furnace tap hole clay is also added with 20% of an additional binder according to the mass percentage of the blast furnace tap hole clay.

[0018] Preparation method: put all the above-mentioned raw materials into a mixer, pre-mix for 3 minutes, add 95% of the total amount of binder, and mix and grind for 30 minutes, then test the product's Masha value, the qualified range is 500-700KPa, and it is discarded if it is lower than 500KPa , when it is higher than 700KPa, finally gradually add the remaining 5% of the external binder to adjust the Masha value to the acceptable range, mix and grind for 10 minutes, and discharge the material, which is formed by the extruder and packaged, which is the finished product. The horsesia value of the product is controlled at 500Kpa.

Embodiment 2

[0020] A kind of 1800m ferro-titanium slag 3 The blast furnace tap hole clay 2 is composed of the following components by weight percentage:

[0021]

[0022] The blast furnace taphole clay is also added with an additional binder of 18% according to the mass percentage of the blast furnace taphole clay.

[0023] Preparation method: Put all the above-mentioned raw materials into a mixer, pre-mix for 2 minutes, add 95% of the total amount of binder, mix and grind for 30 minutes, test the product's Masha value, the qualified range is 700-900KPa, and it is discarded if it is lower than 700KPa , when it is higher than 900KPa, finally gradually add the remaining 5% of the external binder to adjust the Masha value to the acceptable range, mix and grind for 10 minutes, then discharge the material, shape it through the extruder, and pack it, which is the finished product. The horsesia value of the product is controlled at 800Kpa.

Embodiment 3

[0025] A 2200m ferro-titanium slag 3 The blast furnace tap hole clay 3 is composed of the following components in weight percentage:

[0026]

[0027]

[0028] The blast furnace taphole mud is also added with an additional binder of 16% according to the mass percentage of the blast furnace taphole mud.

[0029] Preparation method: Put all the above-mentioned raw materials into the mixer, pre-mix for 5 minutes, add 92% of the total amount of binder, mix and grind for 28 minutes, test the product's Masha value, the qualified range is 900-1100KPa, and it is discarded if it is lower than 900KPa , when it is higher than 1100KPa, finally gradually add the remaining 8% of the external binder to adjust the Masha value to the acceptable range, mix and grind for 5 minutes, then discharge the material, shape it through the extruder, and pack it, which is the finished product. The horsesia value of the product is controlled at 1000Kpa.

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Abstract

The invention provides a blast-furnace taphole stemming prepared from titanium-iron slag. The blast-furnace taphole stemming is characterized by being prepared from the following raw materials in percentage by weight: 30-50% of ferrotitanium slag, 5-10% of corundum, 10-20% of silicon carbide, 5-10% of ferrosilicon nitride, 10-15% of clay, 5-8% of asphalt and 10-18% of coke. According to the invention, 10-20% by weight of a binding agent is additionally added into the raw materials for preparing the blast-furnace taphole stemming. Because the ferrotitanium slag generated from the production of ferrotitanium alloy is recycled, the discharge of wastes can be reduced, the recycling of resources can be promoted, and further the consumption of mineral resources like bauxite, corundum and silicon carbide for producing the blast-furnace taphole stemming can be reduced. By using the blast-furnace taphole stemming provided by the invention, the taphole enlarging rate can be reduced effectively, the tapping time can be prolonged, the smelting efficiency of the blast furnace can be improved greatly, the consumption of refractory of the blast furnace can be decreased, and the cost can be saved. The blast-furnace taphole stemming is highly practical.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular refers to a blast furnace taphole clay prepared by using ferrotitanium slag and a preparation method thereof. Background technique [0002] Ferro-titanium slag is the slag produced during the smelting of ferro-titanium alloy by the aluminothermic method. The amount is quite large. On average, 1.5 tons of ferro-titanium slag will be produced at the same time for every ton of ferro-titanium alloy produced. my country is one of the countries with the richest ferro-titanium resources in the world. With the development of ferro-titanium industry, the accumulation of ferro-titanium slag is also increasing. At present, most enterprises only use ferro-titanium slag as industrial waste landfill or use it for brick making and cement making in the building materials industry after simple treatment, which causes waste of resources and seriously pollutes the environment, and does not fund...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B09B3/00
Inventor 何见林雷中兴孙戎田先明王志强秦常杰徐志华周辉
Owner 武钢集团有限公司
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