Formula of efficient silicon-boron system impregnant as well as preparation and application processes of efficient silicon-boron system impregnant

A technology of impregnating agent and silicon boron, which is applied in the field of impregnating agent for electrolytic aluminum anode carbon block, high-efficiency silicon boron system impregnating agent formula and its preparation and application process, which can solve the problem of unsatisfactory product purity, insufficient impregnation depth and long impregnation time to avoid inconsistent reaction rates, high dispersion stability, and easy access to raw materials

Pending Publication Date: 2022-02-08
湖南国发控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the above-mentioned technical problems and provide a high-efficiency silicon-boron system impregnating agent formula and its preparation and application process. Using the impregnating agent and utilizing the vacuum impregnation method, the impregnating agent forming the silicon-boron system can be effectively The tissue

Method used

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  • Formula of efficient silicon-boron system impregnant as well as preparation and application processes of efficient silicon-boron system impregnant
  • Formula of efficient silicon-boron system impregnant as well as preparation and application processes of efficient silicon-boron system impregnant
  • Formula of efficient silicon-boron system impregnant as well as preparation and application processes of efficient silicon-boron system impregnant

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] In this embodiment, a high-efficiency silicon boron system impregnation is a solution made of boron sand, sodium silicate and water. According to the mass fraction, the boron content is 2% in the solution, and the silicon content is 2%, the remaining amount is water.

[0031] The impregnating agent in this example is prepared and used when the electrolytic aluminum anode is replaced, and the specific preparation and application methods include the following steps:

[0032] A. As a proportion of boron sand and sodium silicate according to the proportion of the impregnant assembly, the first two are placed in the stirring vessel, dissolved in water, and mix well with 80 rpm agitation;

[0033] B. Record the impregnation of the previous step to the reserve;

[0034] C, placing the pre-baked anode carbon block in the impregnation tank and taking the vacuum treatment, so that the vacuum in the can is 300 Pa;

[0035] D. Implact the prepared impregnation liquid...

Example Embodiment

[0039] Example 2

[0040] The present embodiment differs from the first embodiment in that the high-efficiency silicon boron system impregnation in the present embodiment, the boron content is 2%, the silicon content is 4%, the remaining amount is water. The steps of specific preparation and application methods are the same as those of the examples.

[0041] The anode was carried out in the anode after the E steps of the E step in this example, and the residual rate was 97.6%, the dust content was 0.8%, and the loss rate was 1.6%.

Example Embodiment

[0042] Example 3

[0043] The present embodiment differs from the first embodiment in that the high-efficiency silicon boron system impregnation in the present embodiment, the boron content is 2%, the silicon content is 4%, the remaining amount is water. The steps of specific preparation and application methods are the same as those of the examples.

[0044] The anode was carried out in the anode after the E step of the E step in this example, and the residual rate was 98.5%, the dust content was 0.4%, and the loss rate was 1.1%.

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PUM

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Abstract

The invention discloses a silicon-boron system impregnant, which is a solution prepared by blending 0.001%-10% of a silicon-based substance, 0.001%-10% of a boron-based substance, less than or equal to 10% of an auxiliary agent and 80%-99% of water according to a certain proportion. The auxiliary agent is a thickening agent, and the use amount of the thickening agent is adjusted according to actual requirements, so that the viscosity of the impregnant is controlled to be 0.01-10 Pa.s. The impregnant is organized and actively enters pores in the anode in a mode of first negative pressure and then positive pressure, is dried at a low temperature, and forms a compact silicon-boron anti-oxidation film on the inner cavity wall of an anode carbon block in a high-temperature environment during electrolysis, and has certain bonding strength, the silicon-based substance in the impregnant enhances the oxidation resistance of the carbon anode by improving the adhesion of a boron oxide film and the carbon anode, invalid oxidation in pore channels of the anode carbon block can be effectively prevented, the air reactivity is reduced, and a silicon-boron-carbon system forms a stable net-shaped structure in pores of the anode carbon block, so that slag falling is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of impregnating agents for carbon or graphite materials that are formed by mixing and pressing one or more of amorphous carbon raw materials such as coal, carbon powder, petroleum coke, and pitch coke, and are sintered and shaped. The invention relates to an impregnating agent for electrolytic aluminum anode carbon blocks, in particular to a high-efficiency silicon-boron system impregnating agent formula and its preparation and application process. Background technique [0002] The anode used in electrolytic aluminum is made of petroleum coke and pitch coke as the aggregate, and coal tar pitch as the binder. This kind of carbon block has a stable geometric shape after long-term roasting, so it is also called prebaked anode carbon block. In electrolytic aluminum, the prebaked anode is called the "heart" of the aluminum electrolytic cell by the industry. The consumption of aluminum per ton is 500 kg, and the p...

Claims

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Application Information

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IPC IPC(8): C25C3/12C04B41/85
CPCC25C3/125C04B41/5022C04B41/5024C04B41/85C04B41/009C04B35/52C04B41/5006C04B41/4539
Inventor 黄强卢丰玉黄治齐
Owner 湖南国发控股有限公司
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