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A method for comprehensive utilization of vanadium-titanium magnetite

A technology for vanadium-titanium-magnetite and magnetic separation separation, which is applied in chemical instruments and methods, magnetic separation, and process efficiency improvement, etc. It can solve the problems of serious agglomeration reduction and pulverization, and achieve the effects of being beneficial to environmental protection, short reaction time and shortened production cycle.

Inactive Publication Date: 2011-12-14
UNIV OF SCI & TECH BEIJING
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  • Abstract
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  • Claims
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Problems solved by technology

However, there are some defects in these two processes. The northern process consumes a lot of sodiumizing agent, and the pellets after sodiumizing and extracting vanadium are seriously pulverized; the southern process avoids the shortcomings of the northern process, but the technical difficulty lies in the electric furnace melting process. Among them, the trend of vanadium is difficult to control, and both types of processes are in the research stage
[0006] The application number is 200510020117.7 Chinese patent application "from the method for separating and extracting metal elements from vanadium-titanium-magnetite" proposed vanadium-titanium-magnetite rotary hearth furnace direct reduction-electric furnace melting process, to a certain extent improves The recovery rate of iron, vanadium and titanium is improved, but there is re-oxidation of metallized pellets in the process. At the same time, a large amount of slag-forming materials added in the melting process and the erosion of the furnace lining by molten slag lead to low grade titanium slag, which reduces the The economic extraction value of titanium; at the same time, due to the existence of the electric furnace melting process, the energy consumption is relatively high, which is not conducive to the comprehensive recovery of vanadium-titanium magnetite resources

Method used

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  • A method for comprehensive utilization of vanadium-titanium magnetite
  • A method for comprehensive utilization of vanadium-titanium magnetite

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Embodiment 1

[0024] What this embodiment adopts is the vanadium-titanium magnetite in Panzhihua area (composition is TFe54.54%, FeO23.16%, SiO 2 2.934%, CaO0.398%, Al 2 o 3 3.54%, MgO3.7%, S0.292%, TiO 2 10.77%, V 2 o 5 0.666%), and add 20% reducing agent (the composition is fixed carbon 86.47%, volatile matter 8.58%, ash 4.95%, S0.31%), flux (CaF 2 2%) and binder (cornmeal 2.5%), mix well, add water, press into a block, dry at 200-300°C, add to the rotary hearth furnace for high temperature reduction, the temperature in the rotary hearth furnace Keep it at 1350-1500°C, and control the reduction time at 15-45 minutes. After the reduction, magnetic separation separates to obtain high-titanium slag and pearl iron. After the high-titanium slag extracts vanadium, the grade of titanium slag is above 48.73%, and the slag is oxidized The content of ferrous iron is less than 2%, which meets the raw material requirements of sulfuric acid titanium dioxide production process; the iron content of...

Embodiment 2

[0026] What this embodiment adopts is the vanadium-titanium magnetite in Panzhihua area (composition is TFe53.54%, FeO28.16%, SiO 2 2.2%, CaO0.338%, Al 2 o 3 2.74%, MgO1.4%, S0.302%, TiO 2 10.82%, V 2 o 5 0.5%), and add 15% reducing agent (the composition is fixed carbon 86.47%, volatile matter 8.58%, ash 4.95%, S0.31%), flux (Na 2 SO 4 3%, CaF 2 2%) and binder (cornmeal 1.5%), mix well, add water, press into a block, dry at 200-300°C, add to the rotary hearth furnace for high temperature reduction, the temperature in the rotary hearth furnace Keep it at 1350-1500°C, and the reduction time is controlled at 15-45min. After the reduction, magnetic separation separates to obtain high-titanium slag and pearl iron. After the high-titanium slag extracts vanadium, the grade of titanium slag is above 49.64%, and the slag is oxidized The content of ferrous iron is less than 2%, which meets the raw material requirements of the sulfuric acid titanium dioxide production process; th...

Embodiment 3

[0028] What this embodiment adopts is the vanadium-titanium magnetite in Panzhihua area (composition is TFe55.34%, FeO29.07%, SiO 2 2.3%, CaO0.32%, Al 2 o 3 2.45%, MgO1.21%, S0.35%, TiO 2 8.27%, V 2 o 5 0.69%), and add 18% reducing agent (the composition is fixed carbon 86.47%, volatile matter 8.58%, ash 4.95%, S0.31%), flux (Na 2 SO 4 1.5%, CaF 2 2.5%) and binder (cornmeal 3.0%), mix thoroughly, add water, press into a block, dry at 200-300°C, add to the rotary hearth furnace for high temperature reduction, the temperature in the rotary hearth furnace Keep it at 1350-1500°C, and the reduction time is controlled at 15-45min. After the reduction, magnetic separation separates to obtain high-titanium slag and pearl iron. The iron content is less than 2%, which meets the raw material requirements of the sulfuric acid titanium dioxide production process; the iron content of pearl iron is more than 96%, which is a high-quality steelmaking raw material for electric furnaces. ...

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Abstract

The invention relates to a method for comprehensive utilization of vanadium-titanium magnetite, which belongs to the field of new technology of direct reduction ironmaking in the metallurgical industry. In order to solve the problems of low utilization of iron, vanadium and titanium in vanadium-titanium magnetite, at the same time, due to the sintering process of traditional technology, the comprehensive energy consumption of the overall smelting process is relatively high, and the environmental pollution is serious. The invention provides a method of agglomerating vanadium-titanium magnetite and producing high-titanium slag and pearl iron by high-temperature reduction and melting in a rotary hearth furnace. The technical solution includes pelletizing of vanadium-titanium magnetite, high-temperature reduction in rotary hearth furnace, magnetic separation, and high-temperature reduction in rotary hearth furnace to directly produce high-titanium slag and pearl iron. Applying this method to process vanadium-titanium magnetite can not only effectively solve the problem of recovery of titanium and vanadium resources, but also obtain qualified iron pearls for steelmaking in electric furnaces, making full use of the iron, vanadium, and Valuable elements such as titanium.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of vanadium-titanium magnetite, which belongs to the field of new technology of direct reduction ironmaking in the metallurgical industry. High-grade titanium slag and vanadium slag are obtained by high-temperature reduction melting of rotary hearth furnace to produce high-titanium slag and ferrite pearls. After vanadium is extracted from high-titanium slag, high-grade titanium slag and vanadium slag are obtained to achieve comprehensive recycling of iron, vanadium and titanium in vanadium-titanium magnetite. The purpose of other valuable elements. Background technique [0002] Vanadium-titanium magnetite is a mineral mainly composed of iron, vanadium and titanium, accompanied by a small amount of chromium, gallium, scandium, cobalt, nickel, platinum and other components, which has important comprehensive utilization value. [0003] The main metal minerals in the ore are: titanomagnetite ...

Claims

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Application Information

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IPC IPC(8): C21B13/00C22B1/14C22B7/00C22B3/08B03C1/00C22B34/12
CPCY02P10/20
Inventor 张建良邢相栋刘征建王春龙张旭曹明明任山苏步新焦克新
Owner UNIV OF SCI & TECH BEIJING
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