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Iron ore concentrate oxidized pellet production process

A technology of oxidized pellets and production process, which is applied in the field of metallurgy, can solve problems such as high energy consumption and complex process flow, and achieve the effect of simplifying the process, simplifying the process flow, and reducing production costs

Active Publication Date: 2014-09-24
CITIC HEAVY INDUSTRIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems of complex technological process and high energy consumption in the raw material pretreatment process in the production of pellets in the prior art, and to provide a production process for iron concentrate oxidized pellets

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  • Iron ore concentrate oxidized pellet production process
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Embodiment

[0017] A process for producing iron concentrate oxidized pellets, comprising the following steps: Step (1), among iron concentrate raw materials, iron concentrate with a particle size of less than 0.074mm accounts for 70-90% of the total particle size iron concentrate, and the specific surface area is 500~1800cm 2 / g, the moisture content is 9~13%. After the iron concentrate is pre-mixed, it is directly sent to the vertical mill by the belt conveyor, and the raw material is dried and pretreated in the vertical mill at the same time; step (2), the iron concentrate in the vertical mill The particle size is less than 0.074mm, accounting for more than 90% of the mass percentage, and the specific surface area is 1800-2200cm 2 / g, when the water content is 0-3%, it is taken out by the exhaust gas and enters the cyclone, the exhaust gas discharged from the cyclone enters the dust collector and then discharged into the atmosphere, and the dust collected by the dust collector returns t...

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Abstract

The invention relates to an iron ore concentrate oxidized pellet production process which comprises the following steps: drying and pretreating sorted iron ore concentrates; mixing the dried and pretreated iron ore concentrates to form a mixture; feeding the mixture into a pelletizer to form crude pellets having a diameter of 8-16 mm; drying and preheating the crude pellets; roasting the preheated crude pellets; and cooling the roasted pellets through an annular cooler to obtain finished pellets. According to the invention, a vertical mill is used to integrate drying, milling and material neutralization of the iron ore concentrate raw materials, so that a cylindrical drier and pretreatment equipment used in the traditional production process are substituted, thereby simplifying the process flow, saving the occupied area and improving the production efficiency.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to the production of pellets, in particular to a production process for iron concentrate oxidized pellets. Background technique [0002] Generally speaking, the pellet production process includes the receiving, storage, drying and pretreatment of raw materials to ensure that the pelletizing raw materials have a certain particle size and particle size composition, suitable moisture and uniform chemical composition. my country's pellet raw materials are generally transported to the pellet plant after being dehydrated in the concentrator, but in many cases, the moisture content of the iron concentrate is higher than the appropriate pelletizing moisture, and the fluctuation is large during the rainy season. In order to strictly control the moisture content of the iron concentrate and make it meet the requirements of the pelletizing process, further drying is required. Most of the re...

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Application Information

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IPC IPC(8): C22B1/24
Inventor 张平张树辉师华东罗立章魏永杰代伟林谢彦君苏华伟李思拓袁玉帅宋保英
Owner CITIC HEAVY INDUSTRIES CO LTD