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Dry type gunning material

A gunning material, dry technology, applied in the field of iron and steel smelting, can solve the problems of the volume stability of the gunning layer, the strength of the structure compactness and the formation process of the gunning layer, the lack of cohesiveness of the gunning material, and the viscosity of the gunning material. Small and other problems, to achieve the effect of improving the action rate of the converter, shortening the repairing time, and good adhesion

Inactive Publication Date: 2011-07-06
丹东泓辉科大高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wet gunning method adds a lot of water, and the viscosity of the gunning material is small, which is not conducive to the volume stability, structural compactness, strength and formation process of the gunning layer.
In addition, because the vaporization of water delays the sintering of the sintered layer, when adding less water, the gunning material lacks cohesiveness and low adhesion rate

Method used

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  • Dry type gunning material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] According to the following production process:

[0011] (1) Prepare raw materials:

[0012] The composition of magnesia by weight percentage is: MgO 90, SiO 2 3.94, the rest are impurities;

[0013] The composition of large crystal fused magnesium is: CaO 3, MgO 90, and the rest are impurities by weight percentage;

[0014] The residual carbon value of high-temperature asphalt is 54.4;

[0015] (2) Broken

[0016] The raw material first enters the jaw crusher for coarse crushing, then goes through the bucket elevator to the vertical crusher for intermediate crushing, and then enters the roller screen, the material on the screen returns to the vertical crusher for re-crushing, and the material on the screen enters the roller crusher for fine crushing ,, and then enter the roller sieve for sieving, the sieved material is returned to the roller crusher, and the sieved material is sieved into different particle sizes (0-1mm) (1-3mm) (3-5mm) (5-8mm) for later use.

[0...

Embodiment 2

[0021] According to the following production process:

[0022] (1) Prepare raw materials:

[0023] The composition of magnesia by weight percentage is: CaO 1, MgO 92, SiO 2 3.5, the rest are impurities.

[0024] The composition of large crystalline fused magnesium is: CaO 4 , MgO 91% by weight, and the rest are impurities.

[0025] The residual carbon value of high-temperature asphalt is 55.

[0026] (2) Broken

[0027] The raw material first enters the jaw crusher for coarse crushing, then goes through the bucket elevator to the vertical crusher for intermediate crushing, and then enters the roller screen, the material on the screen returns to the vertical crusher for re-crushing, and the material on the screen enters the roller crusher for fine crushing ,, and then enter the roller sieve for sieving, the sieved material is returned to the roller crusher, and the sieved material is sieved into different particle sizes (0-1mm) (1-3mm) (3-5mm) (5-8mm) for later use.

[0...

Embodiment 3

[0032] According to the following production process:

[0033] (1) Prepare raw materials:

[0034] The composition of magnesia by weight percentage is: CaO 2, MgO 93, SiO 2 3.5, the rest are impurities.

[0035] The composition of large crystal fused magnesium is: CaO 5, MgO 91, and the rest are impurities.

[0036] The residual carbon value of high temperature asphalt is 56.

[0037] (2) Broken

[0038] The raw material first enters the jaw crusher for coarse crushing, then goes through the bucket elevator to the vertical crusher for intermediate crushing, and then enters the roller screen, the material on the screen returns to the vertical crusher for re-crushing, and the material on the screen enters the roller crusher for fine crushing ,, and then enter the roller sieve for sieving, the sieved material is returned to the roller crusher, and the sieved material is sieved into different particle sizes (0-1mm), (1-3mm), (3-5mm), (5 -8mm), for later use.

[0039] (3) ra...

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Abstract

The invention discloses a dry type gunning material which comprises the following components based on proportion by weight: 65-72% of magnesium sand, 18-26% of big crystalline fuse magnesium, 5-12% of high-temperature asphalt and 1-4% of binding agent. The dry type gunning material has the advantages that the dry type gunning material has the characteristics of being good in adhesiveness, fast in sintering, large in intensity, long in service life and the like, thereby being completely adapted to the steel-making rhythm of a modern converter and meeting the production requirement. The gunning material is good in adhesivity and high in corrosion resistance, the average service life of the combined action of a gunning brick and a sludge splashing protective converter is 93.7 times, the average time of the gunning 1t material is 10 minutes, 10-15 minutes is saved compared with the condition that the material with the same quantity is gunned by a wet spraying technology, the labor intensity is reduced, the converter gunning time is shortened, the action rate of the converter is improved, the sintering speed is fast at 8-12 minutes, the gunning depth is 30-50mm, the gunning method does not need the water, and the happening of the production accident that the gunning can not be normally performed caused by the blocking of a water pipe and a spray gun since the air temperature of the winter is low can be avoided.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a dry gunning material. Background technique [0002] The gunning material is mainly used to repair the lining of thermal equipment, and the cold material gunning means that the plastic refractory mud is attached to the sprayed body by means of water-containing cement. The melt gunning method is to rely on the high-temperature flame or plasma obtained from the combustion of combustibles to melt or semi-melt the refractory material and then attach it to the sprayed body. It is divided into flame gunning, plasma gunning, and slag splashing to protect the furnace. The dry gunning method is to prepare the refractory material to be gunned according to a certain particle size, and add binders, plasticizers and other additives to mix into a dry mixture, and send it to the nozzle through the gunning machine, rubber hose, Add water (about 10-15%) to the nozzle to mix it into plasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 杜志宝冯为民王辅强
Owner 丹东泓辉科大高温材料有限公司
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