A kind of special water-based binder for rotary hearth furnace and production method thereof

A water-based binder and furnace pelletizing technology, which is applied in the types of binders, starch binders, unsaturated alcohol copolymer binders, etc. problems such as low block rate, to achieve the effects of low cost, food saving, and saving of added amount

Active Publication Date: 2022-07-12
上海宝叶冶金技术有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of iron and steel dust removal and agglomeration, the use of grain starch as a binder not only consumes a large amount of grain, but also has prominent problems such as high price, low agglomeration rate, and high secondary pulverization rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A special water-based binder for rotary hearth furnaces, comprising the following raw materials in parts by weight: 30 parts of starch residues, 10 parts of polyvinyl alcohol, 5 parts of ammonium persulfate, 10 parts of polyacrylamide, 5 parts of sodium hydroxide, and 5 parts of water. 400 copies.

[0039] The preparation method of the special water-based binder for the rotary hearth furnace comprises the following steps:

[0040] (1) Preparation of starch puffing residue fine powder

[0041] The starch residue with a water content of 30% is dried in a steam heating furnace to obtain a starch residue with a water content of 8%. Extrusion and puffing treatment is carried out under the conditions to make starch puffing residue, and the starch puffing residue is pulverized by a pulverizer into a fine powder of starch puffing residue with a mesh number of 1000;

[0042] (2) Preparation of mixed solution one

[0043]Add 100 parts of water to the No. 1 reaction kettle with...

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PUM

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Abstract

The invention provides a special water-based binder for a rotary hearth furnace and a production method thereof, belonging to the technical field of binders. The invention adopts starch residue, polyvinyl alcohol, ammonium persulfate, polyacrylamide, sodium hydroxide and water to prepare the water-based binder suitable for rotary hearth furnace. The water-based binder of the invention has the characteristics of low cost, energy saving and environmental protection, can effectively improve the spheroidization rate of pre-reduced balls of the rotary hearth furnace and the reduction rate of iron elements, and greatly reduces the cost of dust agglomeration and pre-reduction.

Description

technical field [0001] The invention relates to the technical field of water-based binders, in particular to a special-purpose water-based binder for rotary hearth furnaces and a production method thereof. Background technique [0002] Steel smelting has to go through three major processes: sintering, iron making and steel making. The total amount of dust produced is 8% to 15% of the steel output. The total amount of dust recovered by environmental protection dust removal is about 100 million tons to 160 million tons each year. It has a wide variety, different properties, complex components, and is difficult to utilize. For many steel mills without environmental awareness, they will choose the form of landfill and open-air stacking, and these dusts contain many harmful elements, which are harmful to soil, water quality and atmospheric environment. There are also companies that directly return all the generated dust to the sintering process for reuse. Although this method ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J103/02C09J133/26C09J129/04C09J11/04
CPCC09J103/02C09J11/04C08L33/26C08L29/04C08K3/22Y02P20/10Y02P10/20
Inventor 陈书强李伟曾世林任晓健陈文学
Owner 上海宝叶冶金技术有限公司
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