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Grid section used for sintering acid mine

A grate and acid technology, applied in the field of sintered grate, can solve problems such as shortening the service life, and achieve the effects of prolonging the service life, shortening the downtime and reducing the use cost.

Inactive Publication Date: 2013-10-09
JINAN JIGANG IRON ALLOY FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The original grate can no longer adapt to the acid ore sintering conditions, and its service life is greatly shortened from the original 12 months to 6 months

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A grate used for acid ore sintering, its mass percentage is composed of:

[0034] C 1.3%, Cr 28.0%, Mo 0.5%, Ni 1.4%, Si 1.4%, Mn 0.8%, Ti 0.10%, Re 0.14%, Al 1.9%, and the balance is iron (Fe).

[0035] Preparation:

[0036] (1) Ingredients, the furnace charge is mainly medium and low carbon scrap steel, and then mixed with return materials and ferroalloy ferromolybdenum, ferrochrome, ferromanganese, titanium ferro and nickel plates, etc. The return materials should be clean and dry, and the scrap steel should not be seriously corroded. The composition of various ferroalloys shall be specified. The carbon content is mixed according to the lower limit of the specification in the above formula, the chromium, nickel, and molybdenum are mixed according to the middle limit of the specification, and the others are mixed according to the amount required by the range. % (that is, nickel and molybdenum elements are 100% soluble in molten steel), 97-98% for chromium, 90% for m...

Embodiment 2

[0046] A grate used for acid ore sintering, its mass percentage is composed of:

[0047] C 1.2%, Cr 27.0%, Mo 0.4%, Ni 1.3%, Si 1.3%, Mn 0.7%, Ti 0.10%, Re 0.10%, Al 1.5%, and the balance is iron.

[0048] The preparation method is the same as in Example 1.

Embodiment 3

[0050] A grate used for acid ore sintering, its mass percentage is composed of:

[0051] C 1.1%, Cr 26.0%, Mo 0.3%, Ni 1.1%, Si 1.1%, Mn 0.6%, Ti 0.10%, Re 0.06%, Al 1.1%, and the balance is iron.

[0052] The preparation method is the same as in Example 1.

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Abstract

The invention relates to a grid section used for sintering acid mine. The grid section comprises the following components in percentage by weight: 1.1-1.3% of C, 26.0-28.0% of Cr, 0.3-0.5% of Mo, 1.0-1.5% of Ni, 1.0-1.5% of Si, 0.5-1.0% of Mn, 0.10% of Ti, 0.05-0.15% of Re, 1.0-2.0% of Al and the balance of Fe. The grid section disclosed by the invention is totally suitable for acid mine sintering working conditions and satisfies use requirements, the service life of the grid section is prolonged to more than 12 months from less than 3 months, and therefore the use cost of the grid section is greatly lowered. Meanwhile, replacement frequency of the grid section can be reduced, the labor intensity of operators is lowered, downtime for replacing the grid section is shortened, and production efficiency is improved.

Description

technical field [0001] The invention relates to a grate bar for sintered ore. Background technique [0002] Sintering is to mix iron ore powder with a certain amount of fuel and solvent and sinter at high temperature to form lumps for blast furnace ironmaking. It can be divided into acid sinter, self-dissolving sinter and high alkalinity sinter, etc. Among them, high-basic sinter is widely used because of its high strength, good stability, uniform particle size, low sintering temperature and less powder. The main equipment used in the sintering process is the sintering machine and the belt cooler, and the most important wearing part in the sintering machine is the grate. The grate is the main wearing part in the sintering machine. Because it is in contact with high-temperature sinter, its performance directly affects the sintering efficiency and cost. [0003] Aiming at the current situation that my country's fine ore is becoming increasingly scarce, under the existing co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C33/04
Inventor 郭洪卫孙武秦光文王茂周张新凯
Owner JINAN JIGANG IRON ALLOY FACTORY
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