A kind of high alkalinity sintered mineral material and its sintering method, sintered ore

A technology of high alkalinity and sintered ore, which is applied in the field of sintered ore sintering, can solve the problems of high return rate and low utilization coefficient, and achieve the effect of low return rate, improved quality and good quality

Active Publication Date: 2022-03-22
SHOUGANG CORPORATION
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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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  • A kind of high alkalinity sintered mineral material and its sintering method, sintered ore
  • A kind of high alkalinity sintered mineral material and its sintering method, sintered ore
  • A kind of high alkalinity sintered mineral material and its sintering method, 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 mineral material, its sintering method, and sintered ore. The sintered mineral material comprises, from bottom to top, a bottoming material layer, a mixed material layer and a magnetic fine powder ball layer; the magnetic fine powder The ball layer is composed of the first mixture, the alkalinity of the first mixture is 4-6; the first mixture includes the first magnetic fine powder and slaked lime; the particle size of the first mixture is 8-12mm . By adopting the present invention, the sintered ore with high alkalinity and high proportion of magnetic fine powder has good gas permeability in the sintering process, the return rate is low at 19-23%, the drum index of the sintered ore is 78-80%, and the utilization factor of the sintering machine is 1.25. ~1.35t / m 2 .h, and 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 Patents(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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