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High-performance pellet

A high-performance pelletizing technology, applied in the field of metallurgical pellets, can solve the problems of poor metallurgical performance and difficulty in metallurgical waste, and achieve the effects of improved metallurgical performance, low burnout rate, and reduced use

Inactive Publication Date: 2015-03-25
吴雪健
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art that metallurgical waste is difficult to comprehensively utilize and the metallurgical performance of the pellets produced by the prior art is poor, and to provide a high-performance pellet, which not only Metallurgical waste is utilized as a resource, and the binder has strong cohesiveness, and the amount of binder used is small, reducing the introduction of harmful components for ironmaking and steelmaking, and improving the comprehensive metallurgical performance of pellets

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] A kind of high-performance pellet ore of this embodiment is made of concentrate powder and binder, and the quality of binder is 1.1% of concentrate powder quality, and the mass percentage of described concentrate powder composition Be: magnetite powder: 10%, hematite powder: 88.5%, siderite powder: 1.5%; The iron grade of the iron ore powder and the iron grade of the hematite powder are greater than 65%, and the moisture content of the magnetite and hematite is 8.0%.

[0024] The binder components and contents used in this embodiment are as follows: 38 kg of bentonite, 7 kg of activated lime, 3 kg of polyethylene glycol, 3 kg of polyester resin, 1 kg of fly ash, 8 kg of sintered ore cuttings, 1 kg of zirconia, starch 5kg, salt 2kg, polyurethane 2kg, phenolic resin 3kg.

[0025] 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 temp...

Embodiment 2

[0037] A kind of high-performance pellet ore of the present embodiment, its basic content is the same as embodiment 1, and difference is: the mass percentage composition of described concentrate powder composition is: magnetite powder: 14%, hematite Mineral powder: 85%, siderite powder: 1%.

[0038] The components and contents of the binder in this embodiment are as follows: 35kg of bentonite, 5kg of activated lime, 2kg of polyethylene glycol, 2kg of polyester resin, 1kg of fly ash, 5kg of sintered sieve, 1kg of zirconia, 4kg of starch, Salt 1kg, polyurethane 1kg, phenolic resin 2kg.

[0039] The preparation method of the adhesive used in the present embodiment, its steps are as follows:

[0040] (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;

[0041](2) Weigh 1 kg of fly ash, 5 ...

Embodiment 3

[0046] A kind of high-performance pellet ore of the present embodiment, its basic content is the same as embodiment 1, and difference is: the mass percent content of described concentrate powder composition is: magnetite powder: 5%, hematite Mineral powder: 93%, siderite powder: 2%.

[0047] The components and contents of the binder in this embodiment are as follows: 42kg of bentonite, 8kg of activated lime, 4kg of polyethylene glycol, 3kg of polyester resin, 2kg of fly ash, 9kg of sintered ore cuttings, 1kg of zirconia, starch 7kg, salt 3kg, polyurethane 3kg, phenolic resin 4kg.

[0048] The preparation method of the adhesive used in the present embodiment, its steps are as follows:

[0049] (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;

[0050] (2) Weigh 2kg of fly ash, 9kg of...

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Abstract

The invention discloses a high-performance pellet and belongs to the technical field of metallurgical pellets. The high-performance pellet consists of concentrate powder and an adhesive, wherein the adhesive accounts for 1.0-1.2 percent of the mass of the concentrate powder; the adhesive consists of the following components in parts by mass: 35-42 parts of bentonite, 5-8 parts of active lime, 2-4 parts of polyethylene glycol, 2-3 parts of polyester resin, 1-2 parts of coal ash, 5-9 parts of sintered ore sieve residue, 1 part of zirconia, 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 high-performance pellet, wastes in iron and steel enterprises serve as partial components of the adhesive of the pellet, so that the wastes are recycled, the burning residual rate is low, the metallurgical performance of the pellet is improved, the grade of the pellet charged into the furnace is improved, the smelting residue amount during blast furnace ironmaking, the fuel consumption is reduced, and the high-performance pellet has high economic benefits.

Description

technical field [0001] The invention relates to the technical field of metallurgical pellets, in particular to a high-performance pellet. 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. According to different methods, pellets can be obtained from oxidized pellets, cold-set pellets, metallized pellets, etc. [0003] At present, pellets have become one of the main furnace raw materials in the iron and steel industry, and the quality and cost of pellets are also the main bottlenecks for iron and steel enterpr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/245C22B1/248
Inventor 吴雪健杨建安国涛徐忠瑞徐贤东阮堂耀李航张向阳秦垚于亮梁建黄荣辉王东冬
Owner 吴雪健