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An acid and grate 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 cost of use
Inactive Publication Date: 2012-03-28
JINAN JIGANG IRON ALLOY FACTORY
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Problems solved by technology
The original grate can no longer adapt to the acid ore sintering conditions,...
Method used
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Embodiment 1
[0032] A grate used for acid ore sintering, the mass percentage composition of which is:
[0033] 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).
[0034] Preparation:
[0035] (1) Ingredients. The furnace charge is mainly medium and low-carbon scrap steel, followed by the return material and the ferroalloy ferromolybdenum, ferrochrome, ferromanganese, ferro-titanium and nickel plates. The return material should be clean and dry, and the scrap steel should not be severely rusted. The composition of various ferroalloys should be clear. The carbon content is mixed according to the lower limit of the specification in the above formula, chromium, nickel, and molybdenum are mixed according to the middle limit of the specification, and the other is mixed according to the amount required by the range. The alloy element recovery rate when mixed is calculated as follows: nickel and molybdenum are calculated as 100 % (Ie nickel...
Embodiment 2
[0045] A grate used for acid ore sintering, the mass percentage composition of which is:
[0046] 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.
[0047] The preparation method is the same as in Example 1.
Embodiment 3
[0049] A grate used for acid ore sintering, the mass percentage composition of which is:
[0050] C 1.1%, Cr 26.0%, Mo 0.3%, Ni 1.1%, Si 1.1%, Mn 0.6%, Ti 0.10%, Re0.06%, Al 1.1%, and the balance is iron.
[0051] 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 isgreatly 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 productionefficiency is improved.
Description
Technical field [0001] The invention relates to a grate bar for sintering ore. Background technique [0002] Sintering is made by mixing iron ore powder with a certain fuel and solvent and sintering at high temperature into a lump material for blast furnace ironmaking. It can be divided into acid sinter, self-dissolving sinter and high basicity sinter. Among them, the high basicity sintered ore 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 of its contact with high-temperature sintered ore, its performance directly affects the sintering efficiency and cost. [0003] In view of the current situation of my country's increasingly poor fine ore, under the existing cond...
Claims
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Application Information
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