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High-alkalinity sintered ore material, sintering method thereof and sintered ore

A high alkalinity, sintered ore technology, applied in the field of sintered ore sintering, can solve the problems of high ore return rate and low utilization coefficient, etc.

Active Publication Date: 2020-10-23
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a high alkalinity sintered ore and its sintering method to solve the technical problems of high return rate and low utilization factor caused by high alkalinity and high proportion magnetic fine powder sintering in the prior art

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  • High-alkalinity sintered ore material, sintering method thereof and sintered ore
  • High-alkalinity sintered ore material, sintering method thereof and sintered ore
  • High-alkalinity sintered ore material, sintering method thereof and sintered ore

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Embodiment 1 to Embodiment 5

[0057] Embodiment 1 to embodiment 5 provide a kind of sintering method of high alkalinity sintered ore material, wherein all iron-containing raw materials mentioned refer to the magnetic fine powder in the magnetic fine powder ball, the magnetic fine powder and the rich ore powder in the mixture , the sum of the masses of the three. The method includes the following steps:

[0058] (1) Prepare a material with an alkalinity of 4-6 with 10-30% of the mass percentage of all iron-containing raw materials and 2-5% of slaked lime, and prepare it into 8-12mm by pelletizing disc High alkalinity magnetic fine powder balls, dry the magnetic fine powder balls. The sintering mixture is prepared by preparing magnetic fine powder, 0-50% rich ore powder, 10-15% quicklime, and 3-5% coke powder respectively accounting for 40-80% of the mass percentage of all iron-containing raw materials. The basicity is 1.9-2.3, and the sintered mixture is mixed once and twice.

[0059] (2) Use sintered or...

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Abstract

The invention provides a high-alkalinity sintered ore material, a sintering method thereof and sintered ore. The sintered ore material comprises a grate-layer material layer, a mixture layer and a magnetic fine powder sphere layer in sequence from bottom to top, wherein the magnetic fine powder sphere layer is made of a first mixture; the alkalinity of the first mixture is 4 to 6; the first mixture is prepared from first magnetic fine powder and slaked lime; and the granularity of the first mixture is 8 to 12mm. The sintering process of the sintered ore containing high-alkalinity and high-proportion magnetic fine powder is high in air permeability, low rate of return mine being 19 to 23 percent, drum index of the sintered ore being 78 to 80 percent, and utilization coefficient of a sintering machine being 1.25 to 1.35 t / m<2>.h. Moreover, the method is simple, and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of sintering ore sintering, and in particular relates to a high-basicity sintering ore material, a sintering method thereof, and sintering ore. Background technique [0002] Sinter is an important raw material for blast furnace ironmaking in my country. It is obtained by sintering iron ore powder such as magnetic powder or rich ore powder, fuel and flux after mixing and pelletizing. In addition to sinter, blast furnace raw materials will also add some pellets or lump ore. Compared with rich ore powder, magnetic fine powder has fine particle size and poor assimilability, and its high proportion usage results in poor sintering air permeability, high sintering return rate, and reduced sintering utilization coefficient. Due to environmental protection pressure and the use of fine-grained magnetic powder, the output of sintered ore is often suppressed. At the same time, under the condition that high-alkalinity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 马怀营吴建海赵志星贾国利黄福祥潘文李永欣王春来赵俊花张勇赵满祥郑敬先欧书海刘磊张志东
Owner SHOUGANG CORPORATION
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