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Binder for metallurgical cold-pressed pellets and using method thereof

A technology of cold-pressed pellets and binders, which is applied in the field of metallurgical cold-pressed pellets, can solve the problem that Fe-C pellets have a high breakage rate, cannot meet production requirements, and the bond strength cannot reach cold-pressed Fe-C pellets. Production requirements and other issues to achieve the effect of reducing the impact and reducing production costs

Inactive Publication Date: 2011-07-06
鞍钢实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, sodium silicate solution and silicon oxide are used as binders in the implementation of this project, but the bonding strength cannot meet the production requirements of cold-pressed Fe-C pellets, and the finished product of cold-pressed Fe-C pellets is 2 meters high The free drop test was over 6 times, and the pressure resistance of a single ball reached 1800 Newtons. The breakage rate of Fe-C pellets during production was too high, which could not meet the production requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A metallurgical cold-pressed pellet binder is composed of the following two components by weight percentage:

[0016] MgO 91%, MgCl 2 ·6H 2 O 9%.

[0017] The above-mentioned method of using the metallurgical cold-pressed pellet binder is to mix 94.5% iron-containing dust and 5.5% binder in the mixer for 5 to 20 minutes, and mix and grind evenly. When the temperature of the material reaches 45 At ℃, it is cold-pressed and formed under a pressure of 100 tons by a cold-press forming machine.

Embodiment 2

[0019] A metallurgical cold-pressed pellet binder is composed of the following two components by weight percentage:

[0020] MgO 87%, MgCl 2 ·6H 2 O 13%.

[0021] The above-mentioned method of using the metallurgical cold-pressed pellet binder is to mix 91.4% iron-containing dust and 8.6% binder in the mixer for 5 to 20 minutes, and mix and grind evenly. When the temperature of the material reaches 43 At ℃, it is cold-pressed and formed under a pressure of 150 tons by a cold-press forming machine.

Embodiment 3

[0023] A metallurgical cold-pressed pellet binder is composed of the following two components by weight percentage:

[0024] MgO 83%, MgCl 2 ·6H 2 O 17%.

[0025] The above-mentioned method of using the metallurgical cold-pressed pellet binder is to mix 88.3% iron-containing dust and 11.7% binder in the mixer for 5 to 20 minutes, and mix and grind evenly. When the temperature of the material reaches 41 At ℃, it is cold-pressed and formed under a pressure of 200 tons by a cold-press forming machine.

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Abstract

The invention relates to the field of metallurgical cold-pressed pellets, in particular to a binder for the metallurgical cold-pressed pellets. The binder consists of the following components in percentage by weight: 71.4 to 91 percent of MgO and 9 to 28.6 percent of MgCl2.6H2O, wherein the particle size of the MgO and the MgCl2.6H2O is 50 to 200 meshes, and the water content is less than 1 percent. A using method of the binder comprises the following steps of: uniformly mixing and milling 79 to 94.5 percent of iron-containing dust mud and 5.5 to 21 percent of binder in a mixing mill, and performing cold pressing forming by using a cold pressing forming machine with the pressure of 1,000 to 3,000N when the temperature of the materials is between 38 and 45 DEG C. The invention has the advantages that: the binder meets the production requirement of the metallurgical cold-pressed pellets on strength, the compression strength of a single pellet reaches 1,800N after a 2m free drop test is performed for more than six times, and the production cost of the metallurgical cold-pressed pellets is reduced.

Description

technical field [0001] The invention relates to the field of metallurgical cold-pressed pellets, in particular to a binder for metallurgical cold-pressed pellets and a method for using the same. Background technique [0002] In the metallurgical industry, the implementation of environmental protection circular economy. The comprehensive utilization of iron-containing dust and sludge produced in the process of smelting and rolling steel, and the production of cold-pressed Fe-C pellets for converter steelmaking are one of them. [0003] At present, sodium silicate solution and silicon oxide are used as binders in the implementation of this project, but the bonding strength cannot meet the production requirements of cold-pressed Fe-C pellets, and the finished product of cold-pressed Fe-C pellets is 2 meters high The free drop test was more than 6 times, and the pressure resistance of a single ball reached 1800 Newtons. The breakage rate of Fe-C pellets during production was to...

Claims

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Application Information

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IPC IPC(8): C22B1/243
Inventor 丁勇潘秀娟
Owner 鞍钢实业集团有限公司
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