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Organic binder and application thereof

An organic binder, polyacrylamide technology, applied in the field of organic binders, can solve the problems of high production cost, high moisture, high pulverization rate, etc., to reduce production costs, improve pellet strength, and reduce pulverization rate Effect

Inactive Publication Date: 2020-09-15
上海栋一信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current domestic production of cold-set pellets is relatively backward, with high production costs, long cycle times, low strength, and high moisture content. After high-temperature reduction at 1280°C in the terminal rotary hearth furnace, the pellet yield of metallized pellets can be increased. The high conversion rate restricts the mass promotion and use of chilled balls in the converter steelmaking process

Method used

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Examples

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preparation example Construction

[0042] The second aspect of the present invention provides a kind of preparation method of above-mentioned organic binder, comprises the following steps: sequentially add pregelatinized starch, polyacrylamide, white dextrin, sodium carbonate, cellulose derivative, stir, namely Obtain the organic binder.

[0043] The third aspect of the present invention provides an application of the above-mentioned organic binder, and the organic binder is applied to solid waste metal pelletizing in steel mills and rotary hearth furnace pelletizing process.

[0044] In one embodiment, the pellets are mainly derived from one or more of OG mud, LT ash, blast furnace bag ash, and CDQ powder produced in steelmaking.

[0045] In the present invention, the OG mud means that in the process of producing steel by the converter, a large amount of furnace dust is generated, about 16kg / t. In China, most of the converter gas is treated with wet dust collection, which will mix with the furnace dust Into O...

Embodiment 1

[0055] Embodiment 1 provides an organic binder, the composition of the organic binder is: 60 parts of pregelatinized starch, 5 parts of polyacrylamide, 5 parts of white dextrin, cellulose derivative 5 parts, 1 part of sodium carbonate;

[0056] The pregelatinized starch is pregelatinized cornstarch, the viscosity of its 6wt% aqueous solution at 25°C is 500mPa·s, and the pregelatinized cornstarch is purchased from Renqiu Kewei Chemical Co., Ltd.;

[0057] The polyacrylamide is an anionic polyacrylamide with a number average molecular weight of 15 million, purchased from Shanghai Shenying Environmental Protection Technology Co., Ltd.;

[0058] The white dextrin is purchased from Jinan Haoran Chemical Technology Co., Ltd.;

[0059] The cellulose derivative is croscarmellose sodium, purchased from Shanghai Housheng Industry and Trade Co., Ltd.

[0060] The preparation method of the organic binder comprises the following steps: sequentially adding pregelatinized starch, polyacryl...

Embodiment 2

[0062] Embodiment 2 provides an organic binder, the composition of the organic binder is: 80 parts of pregelatinized starch, 15 parts of polyacrylamide, 20 parts of white dextrin, cellulose derivative 15 parts, 4 parts of sodium carbonate;

[0063] Described pregelatinized starch is with embodiment 1;

[0064] Described polyacrylamide is with embodiment 1;

[0065] The white dextrin is purchased from Jinan Haoran Chemical Technology Co., Ltd.;

[0066] The cellulose derivative is croscarmellose sodium, purchased from Shanghai Housheng Industry and Trade Co., Ltd.

[0067] The preparation method of the organic binder is the same as in Example 1.

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Abstract

The invention belongs to the technical field of resource disposal of iron-containing solid waste in a steel plant, and particularly relates to an organic binder and application thereof. The organic binder at least comprises 60 to 80 parts of pregelatinized starch, 5 to 15 parts of polyacrylamide, 5 to 20 parts of white dextrin and 5 to 15 parts of cellulose derivatives. The organic binder providedby the invention is long in shelf life and can be used as an intermediate body for solid waste recycling, the production cost can be remarkably reduced and the period is short; the adding amount is 2.5% of the mass of the iron-containing solid waste in the steel plant; after ball pressing through a 95 kg pressure roller, the wet bulb strength can reach above 300N; after drying (assisted by stronghot air at 400 DEG C) is carried out at 200 DEG C for 25 minutes, the water content is controlled to be within 2%, the strength of the ball can reach above 420N, the ball outlet rate of the metallized pellet can be increased after high-temperature reduction at an end rotary hearth furnace at 1280 DEG C, the pulverization rate is effectively reduced, and the pellet strength is up to above 1800 N.

Description

technical field [0001] The invention belongs to the technical field of resource disposal of iron-containing solid waste in steel mills. More specifically, the invention relates to an organic binder and its application. Background technique [0002] In the process of iron and steel smelting, it needs to go through production processes such as ore dressing, sintering, ironmaking, steelmaking, and steel rolling, and each process will produce some different industrial solid wastes. According to different production processes, the solid waste generated per ton of steel is about 300-500kg. Only part of the dust and by-products with stable components and physical properties have been effectively recycled in the process, but there are still a considerable part of the discharge accumulation, which not only wastes resources but also pollutes the environment. Since the development of human society and modern industry, the development of circular economy has been widely recognized by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244C22B1/248
CPCC22B1/2406C22B1/244C22B1/248
Inventor 赵世银
Owner 上海栋一信息技术有限公司
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