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Integral casting method for stove top refractory lining of hot blast stove

A technology of refractory lining and integral pouring, which is applied in the direction of lining repair, etc., can solve the problems of difficulty in meeting the design life of the furnace, long production process, low construction efficiency, etc., achieve significant social and economic benefits, and excellent thermal shock resistance , The effect of improving production efficiency

Inactive Publication Date: 2013-09-04
成都蜀冶新材料有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of this material selection and construction method are: long production process, large investment, high energy consumption, and thus high cost; completely relying on manual masonry, not only low construction efficiency, but also difficult to guarantee construction quality, and the brick joints become a furnace roof. The weak link of the refractory lining; the refractory lining is a refractory brick that is integrally sintered by pressing and forming. It has poor thermal shock resistance, a high tendency to crack and peel off, and the lining life is low, so it is difficult to meet the design life requirements of a furnace service.

Method used

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  • Integral casting method for stove top refractory lining of hot blast stove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] When the hot air temperature of the hot blast furnace is 1150-1250°C and the working temperature is 1350-1450°C, the pouring method is as follows:

[0047] Step 1 Select GJ-MHL mullite combined with andalusite refractory castable as hot blast stove top castable;

[0048] Step 2 spraying a layer of heat-insulating paint lining inside the steel shell of the hot blast stove roof;

[0049] Step 3 Install the first ring (section) top refractory lining casting mold and wooden partitions in order from bottom to top;

[0050] Step 4 After the mold is installed, pour the refractory lining;

[0051] Step 5 After the pouring is completed, the mold is maintained for 24 hours. After the pouring body is completely solidified, the mold is demoulded and the wooden partition is taken out;

[0052] In step 6, the gap between the cast body and the sprayed layer is covered and the fiber blanket is tightly plugged;

[0053] Step 7. After one ring pouring and fiber blanket plugging are co...

Embodiment 2

[0082] The working condition of the refractory lining on the top of the hot blast stove is that the hot air temperature is 1050-1150°C and the working temperature is 1250-1350°C. The pouring method is as follows:

[0083] Step 1 selects GJ-MLZ mullite combined with aluminum-zirconium refractory castable as the top castable for hot blast stove;

[0084] Step 2 spraying a layer of heat-insulating paint lining inside the steel shell of the hot blast stove roof;

[0085] Step 3 Install the first ring (section) top refractory lining casting mold and wooden partitions in order from bottom to top;

[0086] Step 4 After the mold is installed, pour the refractory lining;

[0087] Step 5 After the pouring is completed, the mold is maintained for 12 hours. After the pouring body is completely solidified, the mold is demoulded and the wooden partition is taken out;

[0088] In step 6, the gap between the cast body and the sprayed layer is covered and the fiber blanket is tightly plugged...

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Abstract

The invention discloses an integral casting method for a stove top refractory lining of a hot blast stove. The method includes the steps of lining castable material selection, split ring installation of a casting die, split ring casting of the lining, paving and padding of a heat preservation lining, drilling of exhaust vents, and the like. Compared with the prior art, the stove top refractory lining of the hot blast stove is long in service life, and the life expectancy can reach 20-25 years; mechanized construction can be achieved, and the stove top refractory lining is simple and convenient, production efficiency is greatly improved, and meanwhile the quality is reliable; thermal shock resistance is good, cracking and stripping of the stove top refractory lining are reduced, weak links of brickwork joints are fundamentally avoided, and cost is just 48-55% of that of a combined bricked refractory lining. Through popularization and application of the method, remarkable social and economical benefits will be generated.

Description

technical field [0001] The invention relates to a construction method for a refractory inner lining of a hot blast stove top, in particular to an integral pouring method for a hot blast stove top refractory inner lining. Background technique [0002] At present, the refractory lining of the top of the hot blast stove in the market is generally made of high-alumina bricks, low-creep high-alumina bricks, andalusite bricks, and silica bricks. In order to facilitate masonry, most of them are made into "combined bricks" according to the shape and size of the hot blast stove roof. The main problems of this material selection and construction method are: long production process, large investment, high energy consumption, and thus high cost; completely relying on manual masonry, not only low construction efficiency, but also difficult to guarantee construction quality, and the brick joints become a furnace roof. The weak link of the refractory lining; the refractory lining is an in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D1/16
Inventor 袁勇张命荣
Owner 成都蜀冶新材料有限责任公司
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