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Preparation method of pellet binder with high performance

A technology of binder and pellets, which is applied in the field of preparation of pellet binders, can solve the problems of poor metallurgical properties of pellets, affecting iron ore into the furnace, and high burnout rate of binders. The preparation method is simple and convenient, the metallurgical performance is improved, and the effect of reducing harmful impurities

Inactive Publication Date: 2014-04-09
吴雪健
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the difficulty of comprehensive utilization of metallurgical waste in the prior art, the high rate of burnt residue of the existing binder, which seriously affects the grade of iron ore fed into the furnace, and the metallurgical properties of the produced pellets are relatively poor In order to solve the shortcomings, a method for preparing a high-performance pellet binder is provided. This preparation method not only utilizes metallurgical waste as a resource, but also produces a binder with strong cohesiveness, which makes the amount of binder The grade of the iron ore put into the furnace is improved, reducing the harmful ingredients for ironmaking and steelmaking, and improving the comprehensive metallurgical properties of the pellets

Method used

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  • Preparation method of pellet binder with high performance
  • Preparation method of pellet binder with high performance
  • Preparation method of pellet binder with high performance

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A high-performance pellet binder of this embodiment has the following components and contents: 38 kg of bentonite, 7 kg of active lime, 3 kg of polyethylene glycol, 3 kg of polyester resin, 1 kg of fly ash, and sintered ore under sieve Material 8kg, zirconia 1kg, starch 5kg, salt 2kg, polyurethane 2kg, phenolic resin 3kg.

[0028] It is worth noting that the above-mentioned active lime is also called soft burnt lime, which is lime with small crystal grains, high porosity and low bulk density obtained at a calcination temperature of about 1100°C, and the active lime used in this example has a The activity is above 330ml / 4N-HCl.

[0029] The polyethylene glycol used in the high-performance pellet binder in this embodiment is PEG-3000, the molecular weight is between 2700 and 3300, the melting point is 51-53° C., and it is milky white solid powder at room temperature. The above-mentioned polyester resins can be divided into unsaturated polyesters and saturated polyesters ...

Embodiment 2

[0039] A kind of high-performance pellet binder of the present embodiment, its basic content is the same as embodiment 1, the difference is: each component and content are as follows: bentonite 35kg, active lime 5kg, polyethylene glycol 2kg, polyethylene glycol 2kg of ester resin, 1kg of fly ash, 5kg of sinter sieve material, 1kg of zirconia, 4kg of starch, 1kg of salt, 1kg of polyurethane, and 2kg of phenolic resin.

[0040] The preparation method of a kind of high-performance pelletizing binder of the present embodiment, its steps are as follows:

[0041](1) Weigh 35kg of bentonite, 5kg of activated lime, 2kg of polyethylene glycol and 2kg of polyester resin according to the mass ratio, mix and stir in a mixer for 25 minutes at a stirring speed of 250r / min, and mix uniformly to obtain mixture A;

[0042] (2) Weigh 1 kg of fly ash, 5 kg of sinter sieve and 1 kg of zirconia according to the mass ratio, and grind the fly ash and sinter sieve in a grinder to an average particle ...

Embodiment 3

[0046] A kind of high-performance pellet binder of the present embodiment, its basic content is the same as embodiment 1, the difference is: each component and content are as follows: bentonite 42kg, active lime 8kg, polyethylene glycol 4kg, polyethylene glycol 3kg of ester resin, 2kg of fly ash, 9kg of sintered sieve material, 1kg of zirconia, 7kg of starch, 3kg of salt, 3kg of polyurethane, and 4kg of phenolic resin.

[0047] The preparation method of a kind of high-performance pelletizing binder of the present embodiment, its steps are as follows:

[0048] (1) Weigh 42kg of bentonite, 8kg of activated lime, 4kg of polyethylene glycol and 3kg of polyester resin according to the mass ratio, mix and stir in a mixer for 30 minutes at a stirring speed of 250r / min, and mix uniformly to obtain mixture A;

[0049] (2) Weigh 2kg of fly ash, 9kg of sinter sieve and 1kg of zirconia according to the mass ratio, and grind the fly ash and sinter sieve in a grinder to an average particle ...

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Abstract

The invention discloses a preparation method of a pellet binder with high performance, and belongs to the technical field of a metallurgy pellet binder. The method comprises the following steps: weighing 35-42 parts of bentonite, 5-8 parts of active lime, 2-4 parts of polyethylene glycol and 2-3 parts of polyester resin according to the mass ratio, evenly mixing to obtain a mixture A; weighing 1-2 parts of coal ash, 5-9 parts of agglomerate sieve residue and 1 part of zirconium oxide according to the mass ratio, evenly mixing with the mixture A, so as to obtain a mixture B; weighing 4-7 parts of starch, 1-3 parts of salt, 1-3 parts of polyurethane and 2-4 parts of phenolic resin according to the mass ratio, and evenly mixing to obtain a mixture C; evenly mixing the mixture B with the mixture C, so as to obtain the binder. By adopting the preparation method of the pellet binder with high performance, wastes of iron and steel enterprises are recycled, the burnt rate is low, the metallurgical performance of the pellet is improved, the grade of the charged ore is improved, the slag quantity of ironmaking and smelting by a blast furnace is reduced, and the fuel consumption is reduced. Therefore, the method has good economic benefits.

Description

technical field [0001] The invention relates to the technical field of metallurgical pellet binders, in particular to a method for preparing a high-performance pellet binder. Background technique [0002] Pellet ore is a product obtained by the pelletizing method. It is made of finely ground concentrate into a block material that can meet the requirements of iron and steel smelting. The process is: use finely ground iron concentrate or iron-containing powder, additives or bonding The agent is dosed and mixed according to a certain ratio, rolled into balls by a pelletizer or compacted by a compactor to form green balls, and then hardened and consolidated by drying, roasting or other methods. Pellets can be obtained by different methods, such as oxidized pellets, cold-set pellets, metallized pellets, etc. Among them, the formation of various pellets is inseparable from binders. [0003] At present, pellets have become one of the main furnace raw materials in the iron and stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242
Inventor 吴雪健杨建从俊强从文奇马南楠徐忠瑞汪玉韩俊俊盛明阔简秋生
Owner 吴雪健
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