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Silica fume pellet binder formula

A technology of micro-silica powder and formula, which is applied in the field of binder formula design, can solve the problems such as micro-silica fume is difficult to recycle, and achieve the effect of reducing silica consumption, cost and production cost

Pending Publication Date: 2022-05-06
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a binder formula for microsilica pellets, which solves the problem that the existing microsilica powder is difficult to recycle, and can expand the source of raw materials for industrial silicon and ferrosilicon enterprises

Method used

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  • Silica fume pellet binder formula

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Effect test

Embodiment 1

[0029] Add organic binders such as starch, lignin, polyacrylamide, and silane coupling agent in a certain proportion, add inorganic binders such as sodium silicate and sodium hydroxide in a certain proportion, mix well, and prepare a high-temperature binder. The component content is: 15% of starch, 10% of lignin, 8% of polyacrylamide, 3% of silane coupling agent, 50% of sodium silicate and 14% of sodium hydroxide.

[0030] Add the main raw materials micro-silica fume, crushed silica, binder and water in a certain proportion, mix evenly, press and form in the briquetting equipment, dry at 150°C to control the moisture content to be less than 1%, store it for later use, control the mixing ratio of raw materials: the amount of water added 6%, binder 3%, fine silica 15%, micro silica fume 76%. Control ball pressure conditions: roller speed 6r / min, pressure 50MPa, mixing time 10min.

Embodiment 2

[0032] Add organic binders such as starch, lignin, polyacrylamide, and silane coupling agent in a certain proportion, add inorganic binders such as sodium silicate and sodium hydroxide in a certain proportion, mix well, and prepare a high-temperature binder. The component content is: 15% of starch, 12% of lignin, 8% of polyacrylamide, 4% of silane coupling agent, 45% of sodium silicate and 16% of sodium hydroxide.

[0033] Add the main raw materials micro-silica fume, crushed silica, binder, and water in a certain proportion, mix evenly, press and shape in the ball pressing equipment, dry at 180°C to control the moisture content to less than 1%, and store it for later use. Control the mixing ratio of raw materials: the amount of water added 8%, binder 5%, fine silica 12%, micro silica fume 75%. Control ball pressure conditions: roller speed 6r / min, pressure 70MPa, mixing time 6min.

Embodiment 3

[0035] Add organic binders such as starch, lignin, polyacrylamide, and silane coupling agent in a certain proportion, add inorganic binders such as sodium silicate and sodium hydroxide in a certain proportion, mix well, and prepare a high-temperature binder. The component content is: 18% of starch, 15% of lignin, 8% of polyacrylamide, 4% of silane coupling agent, 40% of sodium silicate and 15% of sodium hydroxide.

[0036] Add the main raw materials micro-silica fume, crushed silica, binder and water in a certain proportion, mix evenly, press and form in the briquetting equipment, dry at 150°C to control the moisture content to be less than 1%, store it for later use, control the mixing ratio of raw materials: the amount of water added 6%, binder 3%, fine silica 15%, micro silica fume 76%. Control ball pressure conditions: roller speed 6r / min, pressure 50MPa, mixing time 10min.

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Abstract

The invention relates to a formula of a micro-silicon powder pellet adhesive. A novel high-temperature adhesive is obtained by adding starch, lignin, polyacrylamide, a silane coupling agent, sodium silicate and sodium hydroxide according to a certain proportion. The novel high-temperature binder, broken silica and water are added into micro-silicon powder according to a certain proportion, uniformly mixed, pressed and formed in ball pressing equipment, dried and then measured in low-temperature and high-temperature strength. According to the binder disclosed by the invention, the low-temperature strength and the high-temperature strength of the micro-silicon powder pellets are improved, and the micro-silicon powder pellets are used as industrial silicon raw materials, so that the silicon recovery rate can be improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the design of a binder formulation, in particular to a binder formulation for microsilica fume pellets. Background technique [0002] Silica fume is a kind of ultrafine amorphous silica dust waste produced in the process of industrial silicon and ferrosilicon smelting, containing Fe 2 o 3 、Al 2 o 3 , MgO, CaO, carbon powder and other small amount of impurities, when the micro-silica fume is stored in the open air, it is easy to cause dust and cause serious environmental pollution. In the production process of industrial silicon and ferrosilicon, every 3 tons of industrial silicon is produced, 1 ton of microsilica is produced, and every 5 tons of ferrosilicon is produced, 1 ton of microsilica is produced. According to the current annual output of industrial silicon is 2.2 million tons, the annual output of ferrosilicon is more than 5 million tons, and the annual output of micro-silicon fume is about 1.7 million tons. The out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242C22B1/248
CPCC22B1/242C22B1/2413C22B1/2406C22B1/248
Inventor 罗文波龙潇郑小雨李龙丹吕钧龙绍檑陈伦斌洪开发
Owner GUIZHOU INST OF TECH
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