Novel stemming at tap hole

A technology of taphole and taphole mud, which is applied in the field of refractory materials and taphole mud, which can solve the problems of not being able to guarantee the depth of the taphole, poor compressive and thermal shock resistance, and excessive smoke generation, and achieve opening performance Good effect of prolonging tapping time and reducing tapping times

Inactive Publication Date: 2013-07-24
长兴云峰炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the traditional gun putty has the following disadvantages: (1) It produces a lot of smoke; (2) The plasticity is not high, it is not easy to open, and the resistance to compression and thermal shock is poor; (3) The adhesion strength is low; (4) The ironing time is short, and the depth of the tap hole cannot be guaranteed

Method used

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  • Novel stemming at tap hole

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Effect test

Embodiment 1

[0022] The new type of taphole clay includes the following components and the mass ratio of each component is: 8 parts of corundum, 9 parts of high alumina aggregate, 20 parts of silicon nitride bonded silicon carbide, 3 parts of ferrosilicon nitride, and 12 parts of coke powder , 16 parts of clay, 2 parts of flake graphite, 8 parts of pyrophyllite, 5 parts of sericite, 10 parts of aluminum-magnesium spinel, 4 parts of activated alumina micropowder, 3 parts of metal powder, plus 15 parts of composite binder, including 3 parts of tar , 9 parts of silicone modified phenolic resin, 3 parts of organic solvent acetone, and the metal powder is metal silicon powder. The above-mentioned gun mud adopts the following preparation method: After uniformly mixing the dry raw materials, adding a composite binder, rolling and stirring together with the dry raw materials in a roller compactor, and mixing and milling at a temperature of 50°C for 30 Minutes, put the mixed and milled gun mud into...

Embodiment 2

[0024] The new type of taphole clay includes the following components and the mass ratio of each component is: 17 parts of corundum, 12 parts of high alumina aggregate, 21 parts of silicon nitride bonded silicon carbide, 2 parts of ferrosilicon nitride, and 6 parts of coke powder , 12 parts of clay, 2 parts of flake graphite, 6 parts of pyrophyllite, 4 parts of sericite, 8 parts of aluminum-magnesium spinel, 3 parts of activated alumina micropowder, 2 parts of metal powder, plus 18 parts of composite binder, including 3.6 parts of tar , 10.8 parts of silicone modified phenolic resin, 3.6 parts of organic solvent acetone, and metal powder is metal aluminum powder. The above-mentioned gun mud adopts the following preparation method: After uniformly mixing the dry raw materials, adding a composite binder, rolling and stirring together with the dry raw materials in a roller compactor, and mixing and milling at a temperature of 55°C for 40 Minutes, put the mixed and milled gun mud ...

Embodiment 3

[0026] The new type of taphole clay includes the following components and the mass ratio of each component is: 20 parts of corundum, 18 parts of high alumina aggregate, 24 parts of silicon nitride bonded silicon carbide, 3 parts of ferrosilicon nitride, and 5 parts of coke powder , 12 parts of clay, 2 parts of flake graphite, 2 parts of pyrophyllite, 4 parts of sericite, 6 parts of aluminum-magnesium spinel, 2 parts of activated alumina micropowder, 2 parts of metal powder, plus 20 parts of composite binder, including 4 parts of tar , 12 parts of silicone modified phenolic resin, 4 parts of organic solvent acetone, metal powder is metal silicon powder and metal aluminum powder, the ratio of the two is 1:1. The above-mentioned gun mud adopts the following preparation method: after uniformly mixing the dry raw materials, adding a composite binder, rolling and stirring together with the dry raw materials in a roller compactor, and mixing and rolling at a temperature of 60°C for 45...

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Abstract

The invention discloses novel stemming at a tap hole. The stemming comprises the components in parts by weight as follows: 5-25 parts of corundum, 5-25 parts of high aluminum aggregate, 10-30 parts of silicon nitride combined with silicon carbide, 2-3 parts of silicon nitride iron, 5-15 parts of coke powder, 8-20 parts of clay, 1-5 parts of crystalline flake graphite, 5-10 parts of pyrophyllite, 4-7 parts of sericite, 5-10 parts of magnesium-aluminum spinelle, 2-4 parts of active alumina micro powder, 1-3 parts of metal powder and 15-20 parts of external composite binding agent. The composite binding agent comprises tar, modified phenolic resin and an organic solvent. The volume ratio of tar, modified phenolic resin to the organic solvent in the composite binding agent is 1:3:1. According to the invention, with the adoption of the composite binding agent formed by mixing tar and modified phenolic resin, smoke generated is less, the same plasticity to be combined with tar is met, the opening performance is good, the pressure resisting thermal shock resistance is good, and the adhesion strength is high. The depth of the tap hole can be prolonged and the furnace cylinder can be protected, the tapping time is prolonged, and the number of casts every day is reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of refractory materials, in particular to the technical field of tap hole clay. 【Background technique】 [0002] In blast furnace operation, blast furnace clay is one of the most important materials. In recent years, the research on blast furnace longevity has been deepened, and higher requirements have been put forward for the performance of blast furnace clay. In the past, blocking the taphole and stabilizing the taphole were the important functions of the blast furnace clay. However, the service life of the blast furnace now reaches 10-20 years. The depth of the taphole can inhibit the circulation of slag and iron in the furnace, thereby protecting the hearth. Therefore, the main functions of the taphole clay have the following three aspects: (1) blocking out the iron, requiring the taphole clay to have good filling and sintering properties; (2) stabilizing the iron tapping, requiring the taphole clay t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 佘成其马少杰吴建华
Owner 长兴云峰炉料有限公司
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