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Inner lining of furnace for treating liquid steel and repairing method

A technology for processing furnaces and inner linings, which is applied to casting molten material containers, manufacturing tools, metal processing equipment, etc., can solve the problems of poor vibration effect of vibrating tire molds, insufficient density of castables, and large consumption of castables, so as to reduce construction costs. , dense lining and convenient construction

Inactive Publication Date: 2006-07-05
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the process of peeling and pouring, the metamorphic layer of the ladle lining must be peeled off. Sometimes due to the proficiency of the construction workers and the problems of construction machines and tools, part of the original layer may be removed, which directly leads to the consumption of castables. In addition, it needs to be carefully operated to remove the metamorphic layer, the construction progress is slow and time-consuming, which has a great impact on the fast-paced production of the current fast steel plant; on the other hand, due to the poor vibration effect of the vibrating tire mold, the castable Not dense enough, its service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1. The formula is as follows: 6-3 mm plate corundum 20-30%, 3-1 mm plate corundum 20-30%, 1-0 mm plate corundum 8-15%, plate corundum powder 7-15%, electric melting Spinel powder 5-20%, calcium aluminate cement 3-8%, nanometer alumina micropowder 4-9%, sodium tripolyphosphate 0.2-0.5%.

[0036] construction process:

[0037] (1) Clean the lining: clean up the residual steel and a small amount of residue on the surface of the lining and the mouth, remove the remaining breathable bricks and nozzle seat bricks, remove the slag line bricks (if any), and install the breathable bricks and nozzle seat bricks;

[0038] (2) Pouring the bottom of the bag: vibrate the bottom of the bag with a vibrating rod, and when the bottom of the bag has a certain strength, hang it into the vibrating tire mold and fasten it with bolts;

[0039] (3) Install the tire mold: the tire mold is an inverted conical shape with a wall thickness of 12mm. Two horizontal reinforcement belts are...

Embodiment 2

[0045] Embodiment 2. The formula is as follows: 6-3 mm plate corundum 20-30%, 3-1 mm plate corundum 20-30%, 1-0 mm plate corundum 8-15%, plate corundum powder 7-15%, electric melting Spinel powder 5-20%, calcium aluminate cement 3-8%, nanometer alumina micropowder 4-9%, sodium tripolyphosphate 0.2-0.5%.

[0046] construction process:

[0047] (1) Clean the lining: clean up the residual steel and a small amount of residue on the surface of the lining and the mouth, remove the remaining breathable bricks and nozzle seat bricks, remove the slag line bricks (if any), and install the breathable bricks and nozzle seat bricks;

[0048] (2) Pouring the bottom of the bag: vibrate the bottom of the bag with a vibrating rod, and when the bottom of the bag has a certain strength, hang it into the tire mold and fasten it with bolts;

[0049] (3) Vibration: The vibrating rod adopts φ50mm, power 1.1KW, rotating speed 2850 rpm, no-load frequency 200Hz, and amplitude 1.15mm. When the first p...

Embodiment 3

[0053] Embodiment 3. The formula is as follows: 6-3 mm plate corundum 10-20%, 3-1 mm plate corundum 20-30%, 1-0 mm plate corundum 8-15%, plate corundum powder 10-20%, electrofusion Spinel powder 5-20%, calcium aluminate cement 3-8%, nanometer alumina micropowder 4-9%, nanometer silica micropowder 1-5%, sodium tripolyphosphate 0.2-0.5%.

[0054] (1) Clean the lining: clean up the residual steel and a small amount of residue on the surface of the lining and the mouth, remove the remaining breathable bricks and nozzle seat bricks, remove the slag line bricks (if any), and install the breathable bricks and nozzle seat bricks;

[0055] (2) Pouring the bottom of the bag: pour the self-flowing castable into the bottom of the bag, and when the bottom of the bag has a certain strength, hang it into the tire mold and fasten it with bolts;

[0056] (3) During the molding process of the self-flowing castable, there should be an interval of about 3 minutes between each batch of materials t...

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PUM

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Abstract

This invention involves the inner lining of a molten-steel handling furnace and its maintenance and repair. This invention is aimed to putting forward an inner lining that can satisfy the working conditions of ladle casting materials. In this invention the inner lining of the molten-steel handling furnace is cast from fire-resisting casting materials such as the high-purity corundum-magnesium oxide-spinel system. The raw material system comprises fused spinel, fused magnesite, fused white corundum, fused brown corundum, plate corundum, extra-grade alumina, alumina sponel or a combination of them. The repair of the inner lining comprises the steps of: a. cleaning the damaged inner lining to remove the molten slag layer; b. using a casting material whose purity is the same with that of the previous material to repair the damaged positions, so that the previously designed structure of the inner lining is recovered; c. natural drying of the repaired inner lining for 24-72h; d. baking. The surface activity of the microscale or finer additives can strengthen the agglomeration of the casting materials, thus making the agglomerated inner lining more compact and the repaired layer thinner.

Description

technical field [0001] The invention relates to an inner lining of a molten steel treatment furnace and a repair method thereof. Specifically, the present invention proposes a simple repair method by improving the amorphous construction material of the inner lining of the molten steel treatment furnace. Background technique [0002] Compared with traditional ladle masonry materials using shaped refractory products, monolithic refractory materials have the advantages of convenient construction, good integrity, long service life, energy saving and consumption reduction. All countries in the world attach great importance to the development and application of monolithic refractories. Over the past 20 years, Chinese refractory workers have done a lot of research work in the field of unshaped refractories, especially since the 1990s, with the successful development of low-cement, ultra-low cement and cement-free series refractory castables, my country's unshaped refractories The ...

Claims

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Application Information

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IPC IPC(8): C04B35/01B22D41/02
Inventor 刘百宽吴晓霍素珍孙荣海黄江文刘国威
Owner PUYANG REFRACTORIES GRP CO LTD
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