Method for processing vanadium titano-magnetite

A vanadium titanomagnetite and processing method technology, applied in chemical instruments and methods, magnetic separation, solid separation and other directions, can solve the problems of unfavorable large-scale production, high leaching temperature, and high equipment requirements, and avoid high equipment requirements. The effect of high metallization rate and high heat utilization rate

Active Publication Date: 2012-09-19
BEIJING GENERAL RES INST OF MINING & METALLURGY
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Problems solved by technology

However, the high alkali concentration and high leaching temperature r

Method used

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  • Method for processing vanadium titano-magnetite
  • Method for processing vanadium titano-magnetite

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Experimental program
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Effect test

Embodiment 1

[0027] 5000g vanadium-titanium magnetite (TFe ~34%, TiO 2 ~12.5%, V~0.2%) crushing and grinding to less than 74μm accounted for 82%, added 750g bituminous coal (particle size -0.125μm accounted for 80%) and the remaining flue gas in the reduction furnace was oxidized and roasted in the drying preheating furnace to The temperature is 1250°C, it enters the fluidized roasting furnace through the chute, and the bottom of the fluidized furnace is filled with preheated gas (CO 2 ~6%, CO ~ 27%, H 2 ~12%, CH 4 ~0.5%, N 2 ~53%), the control temperature is 1200°C, the residence time is 1h, the output calcine is cooled to 600°C by the heat exchange cooling cylinder and then water quenched. The pulp concentration is 20%, and magnetic separation is performed under 1000 Oersted to obtain iron powder (TFe~90%, V~0.20%, TiO 2 ~1.5%), titanium concentrate (TFe~4.5%, V~0.18%, TiO 2 ~25%), and the iron selection rate was ~93.9%.

Embodiment 2

[0029] 10000g vanadium-titanium magnetite (TFe ~34%, TiO 2 ~12.5%, V~0.2%) crushing and grinding to less than 74μm accounted for 84%, added 1500g bituminous coal (particle size -0.125μm accounted for 83%) and the remaining flue gas in the reduction furnace was oxidized and roasted in the drying preheating furnace until The temperature is 1280°C, it enters the fluidized roasting furnace through the chute, and the bottom of the fluidized furnace is filled with preheated gas (CO 2 ~6%, CO ~ 27%, H 2 ~12%, CH 4 ~0.5%, N 2 ~53%), the control temperature is 1240°C, the residence time is 1h, the output calcine is cooled to 600°C by heat exchange cooling cylinder and then water quenched. The pulp concentration is 20%, and magnetic separation is performed at 1500 Oersted to obtain iron powder (TFe~92%, V~0.24%, TiO 2 ~1.0%), titanium concentrate (TFe~3.5%, V~0.18%, TiO 2 ~25%), and the iron selection rate was ~94.5%.

Embodiment 3

[0031] 5000g of vanadium-titanium magnetite (TFe ~34%, TiO2~12.5%, V~0.2%) is crushed and ground to less than 74μm, accounting for 82%, adding petroleum liquefied gas and the remaining flue gas in the reduction furnace in the drying preheating furnace Carry out oxidative roasting to a temperature of 1300°C, pass through the chute to the boiling roaster, fill the bottom of the boiling furnace with natural gas, control the temperature at 1250°C, and stay for 2.0 hours. The calcined sand is wet milled and ball milled to less than 74μm, accounting for 93%. After ball milling, the slurry is adjusted to a pulp concentration of 25%. Magnetic separation is performed at 1200 Oersted to obtain iron powder (TFe~93%, V~0.24%, TiO2~0.8% ), titanium concentrate (TFe~3.0%, V~0.16%, TiO 2 ~26%), and the iron selection rate is ~95%.

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Abstract

A method for processing vanadium titano-magnetite relates to a method for preparing iron powder and ilmenite concentrate from vanadium titano-magnetite through fluidized bed roasting and magnetic separation. The method is characterized by comprising the following steps in sequence: (1) crushing and grinding the raw ore of vanadium titano-magnetite; (2) drying and pre-heating the powdery material; (3) performing reducing roasting in a heat-ore fluidized bed furnace; (4) carrying out ball milling after calcining and water quenching; and (5) performing magnetic separation to obtain the iron powder and the ilmenite concentrate. The method provided by the invention employs two sections of furnace treatment: a drying preheating section and a reducing roasting section; and compared with a traditional method, the method is short in process flow and avoids briquetting, or pelletizing processing and roasting process sintering of the raw ore, and prevents the raw ore from being attached to the wall; the operation stability is enhanced, and simultaneously, metal enrichment ratio is increased; moreover, the select-out ratios of materials in the whole flow are as follows: the select-out ratio of concentrate iron is 90-96%, while the select-out ratio of vanadium is 55% and the select-out ratio of tailing titanium is 95%.

Description

technical field [0001] A method for processing vanadium-titanium magnetite relates to a method for preparing iron powder and titanium concentrate by two-stage roasting and magnetic separation of vanadium-titanium magnetite raw ore. Background technique [0002] The reserves of vanadium-titanium magnetite in the Panxi area are quite rich, and it is the main mineral resource in the world's vanadium-titanium resources. Among them, the reserves of vanadium metal account for 60.4% of my country's vanadium resources and 12.2% of the world's resources, and the reserves of titanium metal account for 10% of my country's titanium reserves. More than 90%, more than 35% of the world's reserves, and it is also one of the large iron ore bases. The existing process for treating vanadium-titanium magnetite is mainly through blast furnace ironmaking to obtain molten iron and titanium-containing blast furnace slag. The molten iron is blown in a converter to obtain vanadium slag. The vanadium s...

Claims

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Application Information

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IPC IPC(8): C22B1/02B03C1/02
Inventor 王成彦尹飞揭晓武陈永强阮书锋王振文杨永强居中军李强王军
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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