Comprehensive utilization method for vanadium-titanium-magnetite concentrate

A technology of vanadium-titanium magnetite concentrate and vanadium-titanium iron concentrate, which is applied in the smelting field of vanadium-titanium magnetite, can solve the problems of unstable product quality, waste of titanium resources, long heat preservation time, etc., and achieve good application and market prospects , Realize the effect of recycling and low equipment requirements

Inactive Publication Date: 2017-05-31
NANJING SOUTHEAST BUILD ELECTROMECHANICAL SEISMIC RES INST
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Problems solved by technology

[0004] Iron and vanadium can be extracted by using the blast furnace smelting process, and titanium enters the high-titanium type blast furnace slag. At present, there is no effective process for recycling, resulting in a waste of about 50% of titanium resources in vanadium-titanium magnetite
[0005] Although the existing non-blast furnace smelting process can realize the comprehensive recycling of iron, vanadium and titanium, it has high energy consumption and unstable product quality, and there is still a long way to go for industrial application
The Chinese patent application number 200810143675.6 discloses a new industrialization method for the comprehensive utilization of vanadium-titanium iron ore concentrate, which adopts the direct reduction of vanadium-titanium-iron concentrate in tunnel kiln, and the firing temperature is 1000-1000℃ when producing sponge iron and fine iron powder 1050°C, the holding time is 10-35 hours, and the temperature for producing microalloyed iron powder is 1150-1200°C, and the holding time is 10-35 hours. The temperature is high and the holding time is long, so the energy consumption is very high; in addition, its preparation process is complicated. Low production efficiency
[0006] At present, whether it is a blast furnace smelting process or a non-blast furnace smelting process, the comprehensive utilization method of vanadium-titanium iron concentrate is mainly based on high-temperature pyrolysis process, which has high energy consumption and low comprehensive recovery rate of elements.

Method used

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  • Comprehensive utilization method for vanadium-titanium-magnetite concentrate

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Experimental program
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Effect test

Embodiment 1

[0041] Vanadium Titanite Concentrate TFe 58wt%, V 2 o 5 0.54wt%, Cr 2 o 3 0.42wt%, TiO 2 10wt%, grind the vanadium-titanium magnetite concentrate to -200 mesh 85%; mix the ground vanadium-titanium magnetite concentrate with 18wt% hydrochloric acid, the liquid-solid mass ratio is 8:1, leaching at 80°C for 60min to obtain acid The leaching solution and the titanium medium ore, the TiO2 grade in the titanium medium ore is 34wt%; the leaching solution is adopted atomization roasting process, the roasting temperature is 500 ℃, adopts compressed air atomization, the spray pressure is 0.2MPa, and the gas-liquid volume ratio is 0.5, Obtain vanadium chromite concentrate and hydrochloric acid, hydrochloric acid recovery is used for the acid leaching of vanadium chromite concentrate, TFe 60wt% in the vanadium chromite concentrate, V 2 o 5 0.65wt%, Cr 2 o 3 0.54wt%; Hydrochloric acid leaching process titanium recovery rate in titanium ore is 93%, and the recovery rate of iron, ...

Embodiment 2

[0043] Vanadium Tiferon Concentrate TFe 60wt%, V 2 o 5 0.6wt%, Cr 2 o 3 0.5wt%, TiO 212wt%, grind the vanadium-titanium magnetite concentrate to -200 mesh 90%; mix the ground vanadium-titanium magnetite concentrate with 20wt% hydrochloric acid, the liquid-solid mass ratio is 8:1, leaching at 85°C for 90min to obtain acid Leaching solution and titanite, TiO in titanite 2 The grade is 37wt%; the leaching solution is atomized and roasted, the roasting temperature is 600°C, the spray pressure is 0.3 MPa, and the gas-liquid volume ratio is 0.5, to obtain vanadium-chromium iron concentrate and hydrochloric acid, and the hydrochloric acid is recovered for vanadium-titanium iron concentrate Acid leaching, TFe 62wt% in vanadium chromite concentrate, V 2 o 5 0.8wt%, Cr 2 o 3 0.6wt%; Hydrochloric acid leaching process titanium in the recovery rate of titanium ore is 94%, and the recovery rate of iron, vanadium and chromium in vanadium ferrochrome concentrate is respectively: ...

Embodiment 3

[0045] Vanadium Titanite Concentrate TFe 58wt%, V 2 o 5 0.54wt%, Cr 2 o 3 0.42wt%, TiO 2 10wt%, grind the vanadium-titanium magnetite concentrate to -200 mesh 85%; mix the ground vanadium-titanium magnetite concentrate with 15wt% hydrochloric acid, the liquid-solid mass ratio is 8:1, leaching at 90°C for 90min to obtain acid Leaching solution and titanite, TiO in titanite 2 The grade is 36wt%; the leaching solution is atomized and roasted, the roasting temperature is 700°C, the spray pressure is 0.1MPa, the gas-liquid volume ratio is 0.6, and vanadium chromite concentrate and hydrochloric acid are obtained, and TFe 61.5wt in vanadium chromite concentrate %,V 2 o 5 0.65wt%, Cr 2 o 3 0.58wt%; The recovery rate of titanium in titanium ore during hydrochloric acid leaching process is 95%, and the recovery rate of iron, vanadium and chromium in vanadium chromite concentrate is respectively: the recovery rate of iron is 83%, and the recovery rate of vanadium is 76%. %,...

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Abstract

The invention relates to a comprehensive utilization method for vanadium titanium magnetite concentrate, in particular to a method for processing the vanadium titanium magnetite concentrate in a wet method and thermometallurgy combined manner, and belongs to the field of smelting of the vanadium titanium magnetite concentrate. The comprehensive utilization method for the vanadium titanium magnetite concentrate includes the following steps that firstly, the vanadium titanium magnetite concentrate and hydrochloric acid are subjected to acidolysis and leaching at the temperature ranging from 75 DEG C to 95 DEG C, filtration is conducted to obtain pickle liquor and titanium middlings, wherein the liquid-solid mass ratio of the leaching reaction ranges from 5:1 to 8:1, and the reaction time ranges from 60 min to 100 min; and secondly, the pickle liquor obtained in the first step is subjected to atomization calcination through an atomization calcination method, vanadium chromium iron concentrate and the hydrochloric acid are obtained through gas-solid separation, wherein the calcination temperature ranges from 500 DEG C to 700 DEG C, the atomization pressure ranges from 0.1 MPa to 0.3 MPa, and the gas-liquid volume ratio ranges from 0.4 to 0.6. By means of the comprehensive utilization method, comprehensive recycling of titanium, iron, vanadium and chromium in the vanadium titanium magnetite concentrate can be achieved, the problem of recycling the titanium resource form the vanadium titanium magnetite concentrate is solved, the process is simple, cost is low, the product added value is high, and the technological process is environment-friendly.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of vanadium-titanium magnetite concentrate, in particular to a method for treating vanadium-titanium magnetite concentrate by combining wet method and pyrometallurgy, and belongs to the field of vanadium-titanium magnetite smelting. Background technique [0002] Vanadium-titanium magnetite is a multi-metal composite symbiotic iron ore mainly containing three elements of iron, vanadium and titanium, accompanied by chromium, cobalt, nickel, copper and platinum group metal elements. It has high comprehensive utilization value of resources. It is an important source mineral of titanium, vanadium and iron resources in my country. my country has huge reserves of vanadium-titanium magnetite, with proven reserves of more than 10 billion tons and prospective reserves of more than 60 billion tons, mainly distributed in Panxi, Sichuan and Chengde, Hebei. [0003] The vanadium-titanium magnetite can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/10C22B3/22C22B3/44C22B1/02
CPCC22B1/02C22B3/10C22B3/22C22B3/44
Inventor 吴恩辉侯静李军李宏柴航刘黔蜀徐众
Owner NANJING SOUTHEAST BUILD ELECTROMECHANICAL SEISMIC RES INST
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