A Method for Improving the Air Permeability of All-fine Powder Sintered Material Layer

A gas-permeable and fine powder technology, applied in the fields of iron and steel smelting and full fine powder sinter, can solve the problems of reduced sinter output, sinter quality, and drum strength, etc., and achieves improved sinter quality and sinter output. The effect of improving and improving the strength of the drum
CN105441669BActive Publication Date: 2017-09-01SHANXI TAIGANG STAINLESS STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANXI TAIGANG STAINLESS STEEL CO LTD
Publication Date
2017-09-01

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Abstract

The invention discloses a method for improving the air permeability of a fully refined powder sintered material layer, relates to the field of steel smelting, in particular to the field of fully refined powder sintered ore. The method comprises the steps that sintering return mines are adopted as granulating balls, are subjected to primary fully refined powder batching mixing, secondary fully refined powder batching mixing, and tertiary fully refined powder batching mixing sequentially, then enter a material loosening device, come out of the material loosening device, and then enter a sintering process. Before being subjected to the primary fully refined powder batching mixing, the sintering return mines are subjected to pre-wetting with atomized water till the water content reaches 4-6%.
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Description

technical field

[0001] The invention relates to the field of iron and steel smelting, in particular to the field of all-concentrated powder sintered ore. Background technique

[0002] The air permeability of the sinter layer is a key technical parameter affecting the sintering process index, sinter output and quality, and the air permeability is closely related to the properties of raw materials and the control of production parameters. Full refined powder, TISCO uses two kinds of iron fine powder for full fine powder sintering, one is magnetite concentrate, the other is hematite concentrate, the particle size of magnetite concentrate is less than 0.074mm and the content reaches more than 96%, hematite concentrate The concentrate particle size is less than 0.045mm and the content reaches more than 98% (full concentrate powder in the present invention refers to the remaining iron concentrate powder after material selection and grinding). The characteristics of raw materials ...

Claims

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