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Iron preparation method and system

A vanadium titanomagnetite, inlet technology, applied in fluidized bed furnaces, furnaces, furnace types, etc., can solve the problems of easy pulverization of mineral pellets, poor reduction effect, low metal recovery rate, etc. The effect of expansion, good effect and high metallization rate

Pending Publication Date: 2016-11-16
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the mineral pellets are easy to pulverize, the reduction effect is not good, and the metal recovery rate is low
[0005] Therefore, the method for preparing iron from vanadium-titanium magnetite concentrate needs to be improved

Method used

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  • Iron preparation method and system

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Embodiment 1

[0074] Utilize the method of the embodiment of the present invention, take vanadium-titanium magnetite as raw material to prepare iron, wherein, the composition of vanadium-titanium magnetite: TFe59.49%, TiO 216.32%, V 2 o 5 1.04%, the specific method is as follows:

[0075] (1) Take 100 parts of vanadium-titanium magnetite ore powder, 100 mesh to 200 mesh account for 90%, and the carbon coordination coefficient is 1.05 to carry out magnetization roasting. The temperature of magnetization roasting is 900 ° C, and the roasting time is 1 hour. The whole process is under nitrogen gas. The method is carried out under the condition of protective atmosphere to obtain magnetized vanadium-titanium ore concentrate powder.

[0076] (2) Ningxia coal below 1mm is used as ingredients for mixing and pelletizing, wherein the ingredients of Ningxia coal are: 83.59% fixed carbon, 9.08% ash, 6.05% volatile matter, and 0.51% total sulfur. The material ratio is: magnetized vanadium-titanium or...

Embodiment 2

[0079] Utilize the method of the embodiment of the present invention, take vanadium titanomagnetite as raw material to prepare iron, wherein, vanadium titanomagnetite composition: TFe59.49%, TiO 2 16.32%, V 2 o 5 1.04%, the specific method is as follows:

[0080] (1) Take 100 parts of vanadium-titanium magnetite ore powder, 100 mesh to 200 mesh account for 90%, and the carbon coordination coefficient is 1.1 to carry out magnetization roasting. The temperature of magnetization roasting is 950 ° C, and the roasting time is 1.5h. The method is carried out under the condition of a nitrogen protective atmosphere to obtain magnetized vanadium-titanium ore concentrate powder.

[0081] (2) Ningxia coal below 1mm is used as ingredients for mixing and pelletizing. The ingredients of Ningxia coal are: fixed carbon 83.59%, ash content 9.08%, volatile matter 6.05%, and total sulfur 0.51%. The material ratio is: after magnetization Vanadium-titanium ore concentrate powder: coal powder: b...

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Abstract

The invention discloses an iron preparation method and system. The method comprises the following steps: mixing vanadium titano-magnetite powder and carbon powder; treating the mixture by magnetizing roasting in nitrogen atmosphere so as to obtain magnetized ore powder; mixing the magnetized ore powder with pulverized coal and an adhesion agent to obtain a mixture; performing forming treatment on the mixture to obtain pellets; treating the pellets by reducing roasting to obtain metallized pellets; and then separating slag and iron in the metallized pellets so as to obtain iron and waste slag. According to the method, the vanadium titano-magnetite powder is subjected to magnetizing roasting treatment before the forming treatment, and the magnetized and roasted schreyerite can effectively inhibit the volume expansion caused by the conversion of crystal form in the ore during the reduction process, so that the problem of the volume expansion caused by the crystal form conversion in the reduction process of the vanadium titano-magnetite pellets can be solved; in addition, the magnetized and roasted schreyerite has a good effect on desulfurization.

Description

technical field [0001] The present invention relates to a method for producing iron and a system for carrying out the aforementioned method for producing iron. Background technique [0002] Vanadium-titanium magnetite is mainly formed in basic or ultrabasic rock mass, which contains a variety of minerals, mainly iron, iron, chromium oxides and various silicate minerals, and a small amount of sulfur and arsenic compounds , phosphate minerals, etc. The common valuable ore minerals are mainly titanium magnetite and iron iron ore, in addition to a small amount of magnetite, hematite and sulfide. Ferromagnetite is a kind of magnetite containing solid solution isolates such as ilmenite, ferrite, and magnesium spar. It can be crystallized into ilmenite and magnetite through regional changes. [0003] Vanadium-titanium magnetite concentrate is one of the main products obtained from the beneficiation of vanadium-titanium magnetite. The main mineral is vanadium-containing titanium m...

Claims

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Application Information

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IPC IPC(8): C21B13/00C22B1/02C22B1/242
CPCC21B13/006C21B13/0046C22B1/02C22B1/242
Inventor 王福佳曹志成薛逊古明远王健月吴佩佩吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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