Method for improving metallization ratio and concentrate iron grade of beach placer reduction product

A technology of metallization rate and iron grade, applied in the direction of fluidized bed furnace, etc., can solve the problems of low metallization rate and iron grade of biomass direct reduction seashore placer products, and difficulty of solid state reduction, so as to reduce the difficulty of solid state reduction , Save process cost, reduce temperature and time

Pending Publication Date: 2021-11-05
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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Problems solved by technology

[0004] Aiming at the technical problems of the high difficulty of solid-state reduction of seaside placer, which leads to the low metallization rate and low iron grade of the direct reduction of seaside placer by biomass, the purpose of the present invention is to provide a method to improve the metal content of iron-containing seaside placer reduction products. The method of refining rate and concentrate iron grade is aimed at alleviating domestic iron ore tension and realizing the comprehensive utilization of seaside placer

Method used

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  • Method for improving metallization ratio and concentrate iron grade of beach placer reduction product
  • Method for improving metallization ratio and concentrate iron grade of beach placer reduction product
  • Method for improving metallization ratio and concentrate iron grade of beach placer reduction product

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Embodiment

[0039] The technological process of this embodiment is as figure 1 As shown, the specific steps are as follows:

[0040] (1) Put 1 kg of seashore placer into a rotary tube furnace at 1000°C, the rotating speed of the tube furnace is 100r / min, air is blown into the furnace by an air compressor for oxidation, the flow rate of air is 1.0L / min, pre-oxidation After 30 min, the sample was cooled to room temperature and taken out. The biomass was taken, dried and pulverized, dried at 100° C. for 6 hours, and pulverized to a particle size of less than 1 mm.

[0041] (2) The biomass whose mol (C / Fe) is 1.0 (the molar ratio of the fixed carbon content in the reducing agent to the total iron content in the seaside placer) is added, and the seaside placer after the pre-oxidation of the calculated quality is added, fully mixed uniform.

[0042] (3) Place 80 g of the mixture obtained in step (2) in a graphite crucible (the specification of the graphite crucible is 50 mm in inner diameter...

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Abstract

The invention discloses a method for improving the metallization ratio and concentrate iron grade of a beach placer reduction product, and belongs to the field of comprehensive utilization of metallurgical resources. The method comprises the following steps: pre-oxidizing beach placer by adopting a rotary tube furnace; fully mixing the pre-oxidized beach placer with the biomass; carrying out reduction roasting on the mixture; and performing ore grinding-magnetic separation on the roasted product to obtain directly reduced iron powder. According to the method, the metallization ratio and the concentrate iron grade of the biomass reduced beach placer product are increased, the process is simple, the production cost is low, the method is environmentally friendly, and the method has great significance in relieving domestic iron ore shortage and achieving comprehensive utilization of beach placer and has good application prospects.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of metallurgical resources, and in particular relates to a method for improving the metallization rate of reduction products of iron-containing seaside placer and the grade of iron concentrate. Background technique [0002] In recent years, with the gradual depletion of terrestrial mineral resources, seaside placer, as the third largest marine mineral resource next to offshore oil and natural gas, has gradually become a research hotspot in the field of resources in various countries in the world. Seaside placer originates from volcanic eruption, and is a kind of secondary enrichment iron placer formed by the action of waves, ocean currents, rivers, and tides on the seashore after cooling by seawater or air. Its main mineral elements are iron, vanadium and titanium. It is composed of ilmenite and ilmenite spar. It is a complex vanadium-titanium magnetite. The gangue is quartz and aluminum p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C21B13/00
CPCC22B1/02C21B13/0066C21B13/0086
Inventor 蔡威庞路张浩浩刘文元赵圆黄康张瑶朱林
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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