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Method for separating and extracting metal element from varadium-titanium magnetite

A technology for vanadium-titanium magnetite and metal elements, which is applied in the field of complex mineral processing, can solve the problems of difficult control of vanadium-titanium flow, long reduction time, long production process, etc., and achieves significant social and economic benefits and reduction reaction speed. The effect of fast and shortened production cycle

Inactive Publication Date: 2006-07-19
SICHUAN LOMON MINING & METALLURGY
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Problems solved by technology

Among them, the sodium oxide extraction process is to extract vanadium with pellet sodium oxidation roasting water first, and then directly reduce the pellet in the rotary kiln after vanadium immersion-electric furnace melting, which can realize the comprehensive recovery of iron, vanadium and titanium, iron, vanadium and titanium. The recovery rates of vanadium and titanium are 85-89%, 58% and 74% respectively, but the production process is long, the consumption of sodiumizing agent is high, the strength of the pellets after vanadium extraction is poor, and the reduction in the rotary kiln is easy to pulverize and form rings. The recovery rate of titanium is low; and the traditional high-temperature reduction method is that the iron concentrate pellets are first consolidated by high-temperature preheating (900-1000°C), and then reduced by a rotary kiln----electric furnace melting to separate iron, vanadium and titanium, and molten iron Vanadium extraction by blowing or recovery of vanadium and titanium from slag, the recovery rates of iron, vanadium and titanium are 89%, 55% and 80% respectively, realizing the comprehensive recovery of iron, vanadium and titanium, reducing the consumption of sodiumizing agent, but there is still a long production process (two-step fire processing), high energy consumption, unstable separation effect of iron and vanadium and titanium during electric furnace melting, difficulty in controlling the flow direction of vanadium and titanium, and low recovery rate of vanadium and titanium
[0003] The application number is the "method and device for preparing high-titanium slag by separating iron and titanium" described in the Chinese patent application No. 02129512. Reduction in a rotary hearth furnace for 20 minutes, the reduced product is cooled and crushed at room temperature and separated by magnetic separation, which has the disadvantages of poor pellet strength, high energy consumption and high cost
Application No. 99115348.0 Chinese Patent Application "Comprehensive Utilization of Vanadium-Titanium Magnetite New Technology" proposed "cold solidification pellet direct reduction method", which shortens the process flow, reduces the consumption of sodiumizing agent, and improves the iron content. The recovery rate of the three elements of vanadium and titanium, but there are still problems of poor pellet strength, long reduction time, and low production efficiency

Method used

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  • Method for separating and extracting metal element from varadium-titanium magnetite

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Experimental program
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Effect test

Embodiment 1

[0021] As shown in Figure 1, the vanadium-titanium magnetite concentrate (the composition is: TFe58.64%, FeO19.69%, TiO 2 11.06%, V 2 O 5 0.71%, Cr 2 O 3 0.021%, Co0.010%, Ni0.0015%, SiO 2 1.68%, Al 2 O 3 3.13%, CaO0.38%, MgO1.78%, S0.093%, P0.021%. Grinding particle size: -200 mesh size 85%. ), pulverized coal (composition: ash 9.93%, volatile matter 10.49%, fixed carbon 78.19%, calorific value 30.75MJ / kg; pulverized coal particle size: -120 mesh accounted for 86%, pulverized coal blending amount: 230kg / t iron concentrate), additives (Na 2 CO 3 , The compounding amount is 3 to 5% of the mineral powder), the binder (carboxymethyl cellulose, the concentration is: 0.3 to 0.5%, the dosage is 0.025 to 0.03% of the mineral powder), mixed in proportion and pressed into a diameter of 10~15mm spherical shape, dried at 80℃, put into the rotary hearth furnace, the temperature of the furnace is controlled at 1200℃, after 60 minutes reduction, cooling out, the total reduction period is 150 m...

Embodiment 2

[0023] As shown in Figure 1, the vanadium-titanium magnetite concentrate (the composition is: TFe59.98%, FeO20.06%, TiO 2 10.97%, V 2 O 5 0.76%, Cr 2 O 3 0.023%, Co0.012%, Ni0.011%, SiO 2 1.52%, Al 2 O 3 3.05%, CaO0.19%, MgO1.70%, S0.018%, P0.024%. The particle size of the iron concentrate is: -200 mesh size of 84 to 87%. ), pulverized coal (composition: ash 8.62%, volatile matter 17.73%, fixed carbon 73.47%, S 0.56%, particle size -200 mesh, 70-75%, pulverized coal dosage is 260kg / t iron concentrate Ore), additives (Na 2 CO 3 , The compounding amount is 4 to 6% of the mineral powder), the binder (carboxymethyl cellulose, the concentration is about 0.5%, the dosage is 0.03 to 0.035% of the mineral powder), mixed in proportion and pressed into a diameter of 10 to 15mm spherical shape, dried at 2 56%±, V 2 O 5 3.89%. It can be used as raw material for extracting vanadium and titanium. After melting, the iron recovery rate is over 96%, and the vanadium and titanium recovery rate is o...

Embodiment 3

[0025] As shown in Figure 1, the vanadium-titanium magnetite concentrate (composition: TFe56.36%, FeO23.67%, TiO 2 13.58%, V 2 O 5 0.55%, Cr 2 O 3 0.002%, Co0.014%, Ni0.008%, SiO 2 1.17%, Al 2 O 3 3.86%, CaO0.21%, MgO3.03%, S0.24%, grinding particle size: -200 mesh size 85%. ), coal powder (high volatile lignite, composition: C58.20%, V32.63%, A8.44%, S 0.83%; coal powder size: -120 mesh accounts for 80%-85%; coal powder The mixing amount is: 280kg / t iron concentrate), additives (Na 2 CO 3 , The compounding amount is 3 to 5% of the mineral powder), the binder (polyvinyl alcohol, the concentration is: 1%, the dosage is 0.03 to 0.035% of the mineral powder), mixed in proportion and pressed into a diameter of 10-15mm Spherical, after drying, put into the rotary hearth furnace, the temperature of the furnace is controlled at 1400℃, after 35 minutes of reduction, cooling out, the total reduction cycle is 90 minutes, the metallization rate reaches 93%, and then melted and separated in t...

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Abstract

The technological process of separating and extracting metal elements from V-Ti iron ore includes the steps of: agglomerating ore powder of mixing V-Ti iron ore powder, reductant, additives and adhesive, pressing the mixture into 10-25 mm diameter agglomerates and drying at 80-90 deg.c; reducing inside one bottom rotating furnace to obtain metal products; smelting the metal products in an electric furnace to obtain molten iron and V-Ti slag component, and smelting the V-Ti slag component to obtain V-Cr oxide and Ti slag as the material for producing titanium while. The present invention has high reduction temperature, fast reduction speed, short reduction time, high production efficiency, high metal and V-Ti recovering rate and less environmental pollution.

Description

Technical field: [0001] The invention relates to a method for processing composite minerals, in particular to a method for separating and extracting metal elements from vanadium-titanium magnetite. Background technique: [0002] Vanadium-titanium magnetite is a composite iron ore containing beneficial elements such as iron, titanium, vanadium, and chromium. For the comprehensive utilization of vanadium-titanium magnetite, the traditional methods are mainly high-temperature sodium oxidation roasting and high-temperature reduction (Wang Wenzhong, editor in chief, "Comprehensive Utilization of Composite Ore"). Among them, the sodium oxide extraction process is to first leaching vanadium with pellets sodium oxidizing roasting water, after leaching vanadium, the pellets are directly reduced by the rotary kiln-electric furnace smelting, which can realize the comprehensive recovery of iron, vanadium and titanium. The recovery rates of vanadium and titanium are respectively 85-89%, 58% a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/00C21B3/02C21B3/04C22B7/04
CPCY02P10/20Y02W30/50
Inventor 李家权范先国秦廷许傅文章龚家竹胡晓程国荣温铭箴洪秉信
Owner SICHUAN LOMON MINING & METALLURGY
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