Production method of bilayer structure pellet and production equipment thereof

A technology with a double-layer structure and a manufacturing method is applied in the field of pellet production methods and equipment, and can solve the problems of less iron ore resources, poor particle size uniformity, difficulty in beneficiation, and increased cost.

Inactive Publication Date: 2014-10-15
邯郸钢铁集团设计院有限公司
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Problems solved by technology

[0003] The pellet production process requires high-grade iron ore powder, fine particle size, and easy pelletizing. However, the current situation of iron and steel mineral resources is very good. Poor, lower grade, SiO 2 Facing such raw material conditions, the phenomenon of fluctuations in the quality

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  • Production method of bilayer structure pellet and production equipment thereof
  • Production method of bilayer structure pellet and production equipment thereof
  • Production method of bilayer structure pellet and production equipment thereof

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Embodiment Construction

[0026] The manufacture method of double-layer structure pellet of the present invention is divided into following five steps and finishes:

[0027] A: Test raw material preparation:

[0028] Application purpose: resource recovery and utilization, adding part of gas ash to the pellets to produce magnesium-containing pellets.

[0029] Mineral powder characteristics: refer to the physical and chemical properties of the mineral powder used in Table 1. Ukrainian and domestic fine powders are high in grade, fine in particle size, and have a high spherical index; high magnesium powder contains MgO, CaO, and SiO 2 The composition is high, slag phase is easy to be produced, and high temperature is required for roasting; gas ash has high carbon content, is not easy to form balls, and is easy to stick when roasted, which will aggravate the ring formation of the rotary kiln. The raw material composition is shown in Table 1.

[0030]

[0031] Table 1 Physical and chemical properties of ...

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Abstract

The invention discloses a production method of a bilayer structure pellet and production equipment thereof, belongs to the technical field of pellet production methods and equipment, and is used for producing a pellet having an inner-layer structure and an outer-layer structure. The technical scheme is that a mineral aggregate easy to generate an adverse effect on the pelletizing process and the roasting process is put in an inner-layer pelletizing disk to serve as a pellet core, and a mineral aggregate with good pelletizing performance and in favor of roasting is put in an outer-layer pelletizing disk to grow to a pellet, so that the pellet with the inner-layer structure and the outer-layer structure is formed, and the influence on the pellet by the adverse effect of the mineral aggregate is prevented. The method and the production equipment are simple in operation, are flexible in parameter adjustment, and can be adapted to a diversified raw material structure; under the condition of shortage of a high-quality iron ore resource at present, the novel production method and the novel production equipment are provided to realize reasonable resource utilization, to improve pellet quality and to guarantee smooth production; and the production method and the production equipment have positive and prominent effects on the sustainable development and the economic benefit improvement of iron and steel enterprises, and have strong promotion and application values.

Description

technical field [0001] The invention relates to a pellet production method and equipment, in particular to a method and special production equipment capable of continuously producing pellets with an inner and outer two-layer structure, and belongs to the technical field of pellet production methods and equipment. Background technique [0002] Pellet ore is one of the main iron-containing raw materials in blast furnace production. Compared with sinter, pellet ore has a small and uniform particle size, which is conducive to improving the air permeability of the upper material layer of the blast furnace and making the material layer more uniform and reasonable; It has the advantages of regular shape, specific surface area much higher than that of sintered ore, high iron grade, large heap specificity, high degree of reduction, good thermal strength, good utilization of gas, and development of indirect reduction. It is an ideal metallurgical charge. In terms of production pro...

Claims

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Application Information

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IPC IPC(8): C22B1/24
Inventor 吝章国孙玉虎张艳允刘晓明王金龙游想琴魏琼花张红闯贾文君郭兰芬
Owner 邯郸钢铁集团设计院有限公司
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