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Method for manufacturing thermal shock resistant movable nozzle brick

A sliding nozzle and manufacturing method technology, which is applied to manufacturing tools, casting equipment, casting melt containers, etc., can solve the problems of low thermal shock resistance, end of service life, and steel leakage of sliding nozzle bricks, and achieve thermal shock resistance. Moreover, the effect of improving thermal shock resistance and firm structure

Inactive Publication Date: 2010-01-13
ANHUI XINHAI ENVIRONMENTAL PROTECTION NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one of the important reasons for the problems or accidents of sliding nozzle bricks is that the thermal shock resistance of sliding nozzle bricks is low, which leads to the termination of service life and even steel leakage accidents.

Method used

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  • Method for manufacturing thermal shock resistant movable nozzle brick
  • Method for manufacturing thermal shock resistant movable nozzle brick
  • Method for manufacturing thermal shock resistant movable nozzle brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The heat-shock resistant sliding nozzle brick of the present invention undergoes technical processes such as raw material selection, pre-mixing, stirring and mixing, pressing and molding, baking and drying, and inspection and warehousing. The specific instructions are as follows:

[0020] 1. Selection of raw materials: Select tabular corundum, corundum micropowder, Al 2 o 3 Micropowder, graphite, composite additives, and thermosetting resin are used as raw materials, of which:

[0021] Tabular alumina Al 2 o 3 >99%, corundum fine powder Al 2 o 3 >99%, specification particle size <5um,

[0022] a-Al 2 o 3 Micropowder: technical requirements: Al 2 o 3 >99% specifications: particle size <2um,

[0023] Graphite: C>98% Specifications: Particle size<5um,

[0024] Composite additives: Al>55%, Mg>35%, specifications: particle size<5um,

[0025] Resin binder: technical requirements: powder degree 4000-12000 (room temperature) centipoise,

[0026] Residual solid con...

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Abstract

The invention discloses a method for manufacturing thermal shock resistant movable nozzle bricks, which is characterized in that when the forming art is carried out, firstly 1-10 high-temperature coils or rings with different diameters are embedded in each movable nozzle brick mould, the high-temperature coils or rings with different diameters use a movable nozzle brick hole as a centre of a circle, and are put in movable nozzle brick materials parallel to the movable nozzle brick surface, the diameter of the high-temperature coils or rings is respectively 1.02-10 times of the hole diameter of the movable nozzle brick; pug is added into the formed movable nozzle brick mould, a brick machine is adopted for pressing, and the forming pressure is greater than 120 MPa. The movable nozzle brick has stronger thermal shock resistance, harder structure and more excellent mechanical property, thereby improving the thermal shock resistance of a slider and solving the problem of the short service life of the breakout caused by a crackle.

Description

technical field [0001] The invention relates to a method for manufacturing a sliding nozzle brick for a ladle. Background technique [0002] Sliding nozzle bricks (also known as sliding bricks) are mainly used in transportation and processing containers (such as ladles). Since the 1960s, the West has applied sliding nozzle bricks to industrial production, and then it has rapidly spread all over the world. Due to its superiority, it has gradually replaced the stopper system and has been widely used. Sliding nozzle brick is the key component to control the flow of molten steel in the sliding nozzle system, which has a great influence on the safe operation of the steel pouring process and the quality of steel. Due to the need to withstand severe thermal stress and produce irreversible damage in harsh working environments, it has higher requirements for precision and stability than other refractory products in terms of crack resistance, corrosion resistance and mechanical prope...

Claims

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Application Information

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IPC IPC(8): B22D41/30
Inventor 陆启海田守信
Owner ANHUI XINHAI ENVIRONMENTAL PROTECTION NEW MATERIAL CO LTD
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