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Ladle working lining construction method

A technology of working lining and ladle, which is applied in the direction of manufacturing tools, metal processing equipment, casting melt containers, etc., and can solve the problems of slow masonry

Active Publication Date: 2016-09-07
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the easy hydration of magnesia-calcium refractory materials, dry-laying is now used for all ladle linings. Dry-laying not only has strict requirements on the size tolerance of magnesia-calcium bricks (including magnesia-calcium bricks and magnesia-calcium-carbon bricks), but also the speed of masonry. Also slow, dry laying takes twice as long as wet laying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This embodiment is a 90t stainless steel ladle, and the working lining of the ladle is made of magnesia-calcium bricks. The bricks of the working lining of the ladle wall are 150mm long and 100mm thick, the bricks of the slag line are 250mm long and 100mm thick, and the free space bricks are 150mm long and thick. 100mm, the size deviation of the ladle-clad magnesia-calcium brick is ±3mm (the allowable deviation of the size of the dry-laid magnesia-calcium brick is ±2mm).

[0018] This embodiment includes the following steps in sequence:

[0019] Ⅰ The working lining of the ladle bottom is dry-built with magnesia-calcium bricks, and the working lining of the ladle wall is wet-built with magnesia-calcium bricks and magnesia-chrome fire clay. Before the lining of the ladle wall is built, mix the magnesia-chrome fireclay evenly: stir the dry-mixed magnesia-chrome fireclay with a mud mixer for 3 minutes, add water, the amount of water to be added is 13%, and the water temper...

Embodiment 2

[0023] This embodiment is a 180t stainless steel ladle, and the working lining of the ladle is made of magnesia-calcium carbon bricks. The bricks of the working lining of the ladle wall are 200mm long and 100mm thick, the bricks of the slag line are 250mm long and 100mm thick, and the free space bricks are 200mm long and The thickness is 100mm, and the size deviation of the magnesia-calcium-carbon brick on the wall of the ladle is ±3mm (the allowable deviation of the size of the dry-laid magnesia-calcium-carbon brick is ±2mm).

[0024] This embodiment includes the following steps in sequence:

[0025] Ⅰ Use magnesia-calcium-carbon bricks to dry-build the ladle bottom lining, and use magnesia-calcium-carbon bricks to wet-build the ladle wall lining with magnesia fire clay as the binder. Before the working lining of the ladle wall is built, mix the magnesia fireclay evenly: stir the dry mix magnesia fireclay with a mud mixer for 3.5 minutes, add water, the amount of water added ...

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Abstract

The invention relates to a steel ladle working lining building method, which sequentially comprises the following steps that 1, a steel ladle bottom working lining is built by magnesia calcium bricks or magnesia calcium carbon bricks in a dry way, and a steel ladle wall working lining is built by the magnesia calcium bricks or the magnesia calcium carbon bricks or using magnetite chrome fire clay or magnesia fire clay as bonding materials in a wet way; 2, after the steel ladle bottom working lining and the steel ladle wall working lining are built, the operation enters a baking stage within two hours. Further, before the steel ladle bottom working lining building in the first step, the magnetite chrome fire clay or the magnesia fire clay is uniformly mixed: dry mixed slurry materials are stirred by a slurry stirring machine for 3 to 5 minutes, then, water is added, the water adding quantity is 13+ / -2 percent, the water temperature is 20+ / -5 DEG C, the stirring is carried out while the water is added, and the stirring time is not less than three minutes after the water adding. The steel ladle working lining building method has the advantage that the building speed is high.

Description

technical field [0001] The invention relates to a ladle working lining construction method. Background technique [0002] Magnesium-calcium refractory materials have a series of excellent features, such as low cost, long service life, ability to purify molten steel, and are environmentally friendly. Currently, this refractory material is mainly used for the working lining of stainless steel ladles. However, due to the easy hydration of magnesia-calcium refractory materials, dry-laying is now used for all ladle linings. Dry-laying not only has strict requirements on the size tolerance of magnesia-calcium bricks (including magnesia-calcium bricks and magnesia-calcium-carbon bricks), but also the speed of masonry. Also slow, dry laying time is twice as long as wet laying. This directly affects the balance and stability of production for a stainless steel enterprise with large production capacity and small ladle capacity. Contents of the invention [0003] In order to overco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/02
CPCB22D41/02
Inventor 张增武闫志伟高洪涛
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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