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Adhesive for zinc-containing fly ash pellets of rotary hearth furnace and preparation method

A rotary hearth furnace and adhesive technology, which is applied in the field of adhesives for zinc-containing dust dust pellets in rotary hearth furnaces, can solve the problem of the increase of harmful elements in dust dust, poor dezincification rate and metallization rate, and many harmful impurities, etc. problem, to achieve the effect of good reducibility, high dezincification rate and high metallization rate

Pending Publication Date: 2021-10-29
河南建杰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although traditional binders are helpful to the formation of pellets, they also have disadvantages such as large amount of addition, low pelleting rate, poor strength, large ash content, and more harmful impurities introduced, which will increase the harmful elements in the dust removal ash. And the dezincification rate and metallization rate are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides an adhesive for dust pellets containing zinc in a rotary hearth furnace and a preparation method thereof, including raw materials mixed in a certain proportion, and according to the mass percentage of each component, the raw materials include: amide 0-2% , CMC 0-8%, pregelatinized starch 40-50%, soda ash 0-5%, baking soda 0-5%, alumina powder 20-30%, bentonite 15-25%;

[0023] Raw material mixing: amide 0-2%, CMC 0-8%, pregelatinized starch 40-50%, soda ash 0-5%, baking soda 0-5%, alumina powder 20-30%, bentonite 15-25% % by weight to prepare and mix evenly.

[0024] Amide and CMC combine with water to provide high cohesion and increase the strength of the wet bulb. Pregelatinized starch has a high cohesive force when it meets cold water. After drying, due to the retrogradation and aging of amylose, the green ball has good plasticity and strength.

[0025] Soda ash and baking soda can be combined with the calcium oxide contained in the dedusti...

Embodiment 2

[0028] This embodiment provides a kind of binder and preparation method for zinc-containing dust-removing ash pellets of rotary hearth furnace, including raw materials mixed according to a certain ratio, and according to the mass percentage of each component, the raw materials include: amide 2%, CMC 8%, pregelatinized starch 40%, soda ash 3%, baking soda 2%, alumina powder 25%, bentonite 20%.

[0029] Implementation three

[0030] This embodiment provides a kind of binder and preparation method for zinc-containing dust-removing ash pellets of rotary hearth furnace, including raw materials mixed according to a certain ratio, and according to the mass percentage of each component, the raw materials include: amide 2%, CMC 8%, pregelatinized starch 40%, soda ash 3%, baking soda 2%, alumina powder 25%, bentonite 20%.

Embodiment 4

[0032] This embodiment provides a kind of binder and preparation method for zinc-containing dust-removing ash pellets of rotary hearth furnace, including raw materials mixed according to a certain ratio, and according to the mass percentage of each component, the raw materials include: CMC 5%, pre- Gelatinized starch 45%, soda ash 5%, alumina powder 20%, bentonite 25%.

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PUM

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Abstract

The invention relates to an adhesive for zinc-containing fly ash pellets of a rotary hearth furnace and a preparation method. The adhesive comprises raw materials mixed according to a certain proportion, and the adhesive is characterized in that the raw materials comprise the following components in percentage by mass: 0-2% of amide, 0-8% of CMC, 40-50% of pregelatinized starch, 0-5% of sodium carbonate, 0-5% of baking soda, 20-30% of alumina powder and 15-25% of bentonite; the raw materials are mixed, specifically, 0-2% of amide, 0-8% of CMC, 40-50% of pregelatinized starch, 0-5% of sodium carbonate, 0-5% of baking soda, 20-30% of alumina powder and 15-25% of bentonite in percentage by weight are prepared and uniformly mixed and stirred; and the adhesive for the zinc-containing fly ash pellets of the rotary hearth furnace is small in dosage, small in ash content and high in strength, harmful substances capable of reducing the iron grade are not introduced, the pellets do not disintegrate and do not pulverize at high temperature, and the prepared pellets are high in dezincification rate, resistant to high temperature, good in reducibility and high in metallization rate.

Description

technical field [0001] The invention relates to an adhesive for zinc-containing dust removal ash pellets of a rotary hearth furnace, in particular to an adhesive for zinc-containing dust removal ash pellets of a rotary hearth furnace and a preparation method thereof. Background technique [0002] During the smelting and production process of iron and steel enterprises, a large amount of dust is produced, which is generally 8% to 12% of the steel output. Such substances contain more environmental pollutants, which will cause problems such as large floor space and environmental pollution. Therefore, it is necessary to make reasonable use of dust removal. [0003] Steel mills collect dust through dust removal facilities, and then select reasonable processes for recycling according to the content of components. The difference of some elements in the dust composition will cause different effects. Dedusting ash is rich in Fe, CaO, MgO, C, etc., and some also contain elements su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242
CPCC22B1/242C22B1/2406
Inventor 孟庆俊周雪霞蔡基伟张志明张华萍
Owner 河南建杰实业有限公司
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