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Preparation method of permanent layer castable and permanent layer for ferrovanadium smelting furnace

A technology for castables and smelting furnaces, which is applied in the field of permanent layer castables for ferrovanadium smelting furnaces and the preparation of permanent layers. It can solve the problems of fast consumption of magnesia bricks, penetration of ferrovanadium, and difficult production organization, so as to avoid economic losses, The effect of improving the service life and reducing the investment cost

Active Publication Date: 2014-03-05
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the permanent refractory layer of the vanadium iron smelting straight cylinder furnace of Panzhihua Iron and Steel Vanadium Products Co., Ltd. is made of 165×115 magnesia bricks, and the working layer is made of magnesia and magnesia fire clay. Because the magnesia bricks are not dense and loose , Fe-vanadium penetration is serious, and at the same time, the permanent layer can only be used for less than 10 furnaces at a time, resulting in frequent replacement of the permanent layer, too fast consumption of magnesia bricks, and difficult production organization

Method used

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Examples

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Effect test

preparation example Construction

[0021] Specifically, the preparation method of the permanent layer castable for the ferrovanadium smelting furnace includes the following steps: a. Mixing: mix the above-mentioned components in proportion, and then add 6 to 10% of the total weight of the material to the mixed material. % of water to continue mixing to form a castable with a certain fluidity; b, pouring: install the mold, put the castable into the gap between the mold and the furnace, and the castable should be evenly and densely distributed; c, dry: dry naturally Forming; d. Demolding maintenance: After removing the mold, place the molded castable in a dry place for natural curing for 72-96 hours; e. Drying: bake the cured molded castable at 150-350°C for 23-25 ​​hours, and then Bake at 350-500°C for 23-25 ​​hours, and finally bake at 500-800°C with wind for 47-49 hours.

[0022] A method for preparing a permanent layer for a ferrovanadium smelting furnace, comprising the following steps:

[0023] a. Mixing: ...

Embodiment 1

[0037] The various raw materials added in this embodiment are: brown corundum is 67.5%, 2377kg; white corundum is 19.5%, 687kg; fused magnesia is 7.5%, 264kg; alumina powder is 3.5%, 123kg; %, 70kg; the total weight of ingredients is 3521kg;

[0038] In this embodiment, the castable is used to prepare the permanent layer according to the following method:

[0039] a. Ingredients: Mix the various raw materials of the above weight with each other, and then add 282kg of water to continue mixing to form a castable with certain fluidity;

[0040] b. Mold installation: install the mold according to the specifications of the permanent layer to be poured;

[0041] c. Pouring: pour the stirred castable in the gap between the furnace and the mold, and use vibrating rods to assist in the pouring process to ensure that the material flows evenly;

[0042] d. Demolding and maintenance: dry naturally for 18 hours, demould, and then place in a dry place for 89 hours of maintenance;

[0043...

Embodiment 2

[0047] The various raw materials added in this embodiment are: brown corundum is 68.5%, 2395kg; white corundum is 20.5%, 717kg; fused magnesia is 6.5%, 227kg; alumina powder is 2.5%, 87kg; %, 70kg; sodium hexametaphosphate is 0.2%, 7kg; stainless steel fiber is 0.5%, 17.5kg; explosion-proof fiber is 0.03%, 1kg; the total weight of ingredients is 3521.5kg;

[0048] In this embodiment, the castable is used to prepare the permanent layer according to the following method:

[0049] a. Ingredients: Mix the various raw materials of the above weight with each other, and then add 289kg of water to continue mixing to form a castable with certain fluidity;

[0050] b. Mold installation: install the mold according to the specifications of the permanent layer to be poured;

[0051] c. Pouring: pour the stirred castable in the gap between the furnace and the mold, and use vibrating rods to assist in the pouring process to ensure that the material flows evenly;

[0052] d. Demoulding and ...

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Abstract

The invention belongs to the technical field of ferrovanadium smelting, and particularly relates to a preparation method of a permanent layer castable and a permanent layer for a ferrovanadium smelting furnace. The invention provides a castable production formula which realizes good using effect, long service life and low cost. The castable consists of the following components in percentage by weight: 67.5-68.5% of brown fused alumina, 19.5-20.5% of white corundum, 6.5-7.5% of fused magnesite, 2.5-3.5% of alumina powder and 2% of silica dust powder. The invention also provides a preparation method of a permanent layer for a ferrovanadium smelting furnace, which comprises the steps of mixing and stirring the production raw materials, pouring, forming and drying. The permanent layer for a ferrovanadium smelting furnace, provided by the invention, can effectively prevent the corrosion and scour of high-temperature molten steel, and can be used repeatedly.

Description

technical field [0001] The invention belongs to the technical field of ferrovanadium smelting, and in particular relates to a casting material for a permanent layer for a ferrovanadium smelting furnace and a preparation method for the permanent layer. Background technique [0002] At present, the permanent refractory layer of the vanadium iron smelting straight cylinder furnace of Panzhihua Iron and Steel Vanadium Products Co., Ltd. is made of 165×115 magnesia bricks, and the working layer is made of magnesia and magnesia fire clay. Because the magnesia bricks are not dense and loose , the penetration of vanadium iron is serious, and at the same time, the permanent layer can only be used for less than 10 furnaces at a time, resulting in frequent replacement of the permanent layer, too fast consumption of magnesia bricks, and difficult production organization. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a perm...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 青光红陈涛吴胜利姚增远郑德明
Owner PANZHIHUA GANGCHENG GROUP
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