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A kind of anode furnace bottom lining composition

A technology of anode furnace and composition, applied in the field of anode furnace maintenance, can solve problems such as furnace bottom expansion joints cannot be closed in a short time, anode furnace bottom expansion joints seep copper, anode furnace bottom bricks are squeezed and damaged, etc. Achieve the effects of avoiding physical dissolution and mechanical erosion, short maintenance time and simple construction

Active Publication Date: 2021-04-06
DAYE NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to solve the problem that the expansion joints of the bottom of the anode furnace cannot be closed in a short time at the initial stage of smelting, and the bottom of the anode furnace is prone to copper penetration in the expansion joints, resulting in the extrusion damage of the bottom bricks of the anode furnace or the accident of drawing lots for the bottom bricks of the anode furnace. occur, greatly shorten the overhaul period of the anode furnace, and increase the production cost of the enterprise, and provide a kind of anode furnace bottom lining composition

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  • A kind of anode furnace bottom lining composition

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Effect test

Embodiment 1

[0030] A kind of lining composition of anode furnace bottom in this embodiment is composed of the following raw materials in mass percentage: magnesium chromium bone powder: 58%, magnesium oxide powder: 28%, water glass: 12.5%, fluosilicic acid Sodium: 1.5%.

[0031] The magnesia-chrome aggregate described in this example is made by crushing magnesia-chrome bricks to a particle size of less than 10mm. Diameter magnesium chromium aggregate accounts for 45%. In order to save the production cost, in this embodiment, the recycled magnesia-chrome bricks are used to prepare the magnesia-chrome aggregate.

[0032] The magnesia powder described in this embodiment is sintered magnesia, wherein the magnesia content is ≥ 90%, the particle size is < 1 mm, and the particle size is < 0.09 mm ≥ 85%.

[0033] The water glass described in this embodiment is made of industrial liquid sodium silicate with a modulus of 2.3 to 3.0 and a silicon dioxide content of ≥25%.

[0034] The sodium fluor...

Embodiment 2

[0037] A kind of lining composition of anode furnace bottom in this embodiment is composed of the following raw materials in mass percentage: magnesium chromium aggregate: 56%, magnesium oxide powder: 30%, water glass: 13%, fluorine silicon Sodium acid: 1%.

[0038] The magnesia-chrome aggregate described in this example is obtained by crushing magnesia-chrome bricks to a particle size of less than 10mm. Diameter magnesium chromium aggregate accounts for 50%. In this example, the magnesia-chrome aggregate prepared by using new magnesia-chrome bricks is not significantly different from the aggregate made of recovered used magnesia-chrome bricks after actual production.

[0039] The magnesia powder described in this embodiment is sintered magnesia, wherein the magnesia content is ≥ 90%, the particle size is < 1 mm, and the particle size is < 0.09 mm ≥ 85%.

[0040] The water glass described in this embodiment is made of industrial liquid sodium silicate with a modulus of 2.3 t...

Embodiment 3

[0045] A kind of lining composition of anode furnace bottom in this embodiment is composed of the following raw materials in mass percentage: magnesium chromium aggregate: 58.5%, magnesium oxide powder: 26%, water glass: 14%, fluorine silicon Sodium acid: 1.5%; the sum of the above four raw materials is 100%.

[0046] The magnesia-chrome aggregate described in this example is obtained by crushing magnesia-chrome bricks to a particle size of less than 10mm. Diameter magnesium chromium aggregate accounts for 40%. In order to save production cost, in this embodiment, the recycled magnesia-chrome bricks are crushed to prepare magnesia-chrome aggregates.

[0047] The magnesia powder described in this embodiment is sintered magnesia, wherein the magnesia content is ≥ 90%, the particle size is < 1 mm, and the particle size is < 0.09 mm ≥ 85%.

[0048] The water glass described in this embodiment is made of industrial liquid sodium silicate with a modulus of 2.3 to 3.0 and a silicon...

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Abstract

The invention discloses an anode furnace bottom lining composition, which is composed of the following raw materials in mass percentage: magnesium chromium aggregate: 55-65%, magnesium oxide powder: 25-35%, water glass: 12-18%, sodium fluorosilicate: 8-12% of the water glass dosage; when in use, after the bottom brick of the anode furnace is built, weigh the raw materials according to the ratio, stir and mix them evenly, and apply them on the anode furnace On the surface of the furnace bottom brick, the thickness of the coating is 20-30mm, and the thickness is qualified. Let it stand for three days for natural curing, that is, a protective lining will be formed on the bottom brick of the anode furnace, and then bake the furnace for 7-8 days according to the normal process, and then it can be opened. It can be used in furnaces; the formula of the invention is simple, the construction is convenient, the thickness of the formed lining is thin, the thermal conductivity is strong, and the heat transfer loss is small, which can protect the bottom brick of the anode furnace from continuing to expand during the furnace production, before the bottom lining is completely worn out. Close the expansion joints to effectively avoid the accident of damage to the furnace bottom bricks due to copper infiltration in the expansion joints during the start-up of the anode furnace.

Description

technical field [0001] The invention relates to the technical field of anode furnace maintenance, in particular to an anode furnace bottom lining composition. Background technique [0002] Expansion joints need to be set when building the furnace bottom of the fixed anode furnace. The specific method is: leave an expansion joint with a width of 2 to 3 mm every 3 to 4 bricks, and fill the joints with cardboard. The function of the expansion joint is to compensate the expansion of the furnace bottom brick after being heated, so as to avoid the deformation of the furnace bottom, the deformation of the furnace body and even the breaking of the furnace bottom brick. After the anode furnace masonry is completed, it takes 7 to 8 days to gradually raise the furnace from room temperature to 1300°C, and start production after the completion of the oven. The purpose of the oven is to gradually increase the temperature of the furnace bottom bricks to fully expand the furnace bottom bri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/047
CPCC04B35/047C04B2235/3427C04B2235/445C04B2235/9676
Inventor 吕重安袁辅平童悦
Owner DAYE NONFERROUS METALS