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Method and system for producing refined sintered iron powder and refined pelletized iron powder simultaneously

A technology for iron powder and pellets, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problem of inflexible adjustment of product design, avoid the decline of equipment utilization efficiency, reduce construction investment, and give full play to equipment. effect of ability

Active Publication Date: 2016-04-20
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present application provides a method and system capable of simultaneously producing sintered iron fines and pelletized iron fines, which solves the technical problem in the prior art that the design of product schemes for different needs cannot be flexibly adjusted, and realizes a concentrator Under the same beneficiation process, different iron ore concentrate products can be produced according to market changes and the needs of downstream manufacturers for different types of iron ore concentrates

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  • Method and system for producing refined sintered iron powder and refined pelletized iron powder simultaneously

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Embodiment 1

[0037] Such as figure 1 As shown, on the one hand, the embodiment of the present application provides a method for simultaneously producing sintered iron fine powder and pelletized iron fine powder, including:

[0038] Step S1: performing one-stage grinding on the finely crushed and pre-selected iron ore to obtain a one-stage grinding product;

[0039] Step S2: classify a section of grinding products to obtain a section of overflow mineral products and a section of underflow mineral products;

[0040] Step S3.1: The first-stage overflow mineral product is subjected to second-stage magnetic separation to obtain sintered iron concentrate, and the first-stage underflow mineral product is returned to the ball mill for first-stage grinding;

[0041] Or, step S3.2: After the first-stage overflow mineral product is subjected to the first-stage magnetic separation, the second-stage grinding and the second-stage classification, then the second-stage magnetic separation is performed to...

Embodiment 2

[0052] A newly-built large-scale iron ore dressing plant, the designed dressing process is coarse crushing-secondary crushing-closed-circuit screening-high-pressure roller mill-coarse wet pre-selection-one-stage closed-circuit grinding-one-stage magnetic separation-second-stage closed-circuit grinding-two Segmental magnetic separation-flotation, producing pellets with a particle size of -325 mesh accounting for 80%.

[0053] In this process, the ore has a particle size of 0-3mm after high-pressure roller milling and coarse wet pre-selection. The separation process of stage grinding stage is one stage of closed circuit grinding - one stage of magnetic separation - two stage of closed circuit grinding - two stage of magnetic separation.

[0054] When the grinding particle size of the iron ore processed by the concentrator is -200 mesh 65%, the iron grade of the iron concentrate produced can reach more than 65%, but it still contains a certain amount of other impurities. If the ...

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Abstract

The invention discloses a method for producing refined sintered iron powder and refined pelletized iron powder simultaneously. The method comprises the following steps: carrying out primary grinding on finely-ground and pre-concentrated iron ores to obtain a primarily ground product; grading the primarily ground product to obtain a primary overflow ore product and a primary underflow ore product; carrying out secondary magnetic separation on the primary overflow ore product to obtain the refined sintered iron powder, and carrying out primary grinding on the primary underflow ore product in a ball grinding mill; or, carrying out primary magnetic separation and secondary grading on the primary overflow ore product, and then carrying out secondary magnetic separation to obtain the refined pelletized iron powder. The method and the system can be used for producing the refined sintered iron powder and the refined pelletized iron powder simultaneously, and thus the two products having different particle sizes can be produced in one process to meet different market requirements; and besides, the using efficacy of the equipment is improved, and the phenomenon that the utilization efficiency of the equipment is decreased due to change of the scheme of concentrate ore products but no change of ore dressing flow is avoided.

Description

technical field [0001] The invention relates to the technical field of iron ore beneficiation, in particular to a method and system capable of simultaneously producing sintered iron fine powder and pelletized iron fine powder. Background technique [0002] At present, in the process design of conventional iron ore concentrators, for certain mineral resources, a product plan is often set, and the beneficiation process is designed according to the product plan, and a concentrate product is obtained through beneficiation. For the beneficiation process that only produces a single product plan, the process is mostly fixed, which is not conducive to flexible adjustment of product plans according to market changes and downstream production needs for product requirements. [0003] For iron ore with relatively high iron grade in the raw ore, the required iron grade can be obtained without fine grinding particle size. When the quality of the concentrate is not high, it can be used as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/30B03B1/00B04C9/00
CPCB03B1/00B03C1/30B03C2201/20B04C9/00
Inventor 陈汉宇杜保清杨涛王斌崔国亮宋复梅李玉发
Owner SHOUGANG CORPORATION
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