Method for realizing comprehensive utilization of iron, vanadium and titanium through low-temperature reduction roasting of vanadium titano-magnetite

A vanadium-titanium magnetite and low-temperature technology, which is applied in the field of low-temperature reduction roasting of vanadium, iron, vanadium-titanium magnetite, and comprehensive utilization of titanium, can solve the problems of strong corrosion, easy volatilization, and only a few times of use, and achieve Corrosion and volatilization are weakened, reducing dosage is small, and the effect of reducing carbon emissions

Pending Publication Date: 2021-10-01
钢研晟华科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But because sodium carbonate has a low melting point, is easy to volatilize, and is highly corrosive, the problem brought by this method is that the use of silicon carbide is only a few times, and the production cost is too high. In addition, the reduction energy consumption of the tunnel kiln is too high, and the coal consumption for the reduction of one ton of metal iron reaches more than 1000 kg, and more than 6GJ of gas supplementary heating is required, which further reduces the economical efficiency of the technology.
This process has been tried in many domestic units, but failed to produce

Method used

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  • Method for realizing comprehensive utilization of iron, vanadium and titanium through low-temperature reduction roasting of vanadium titano-magnetite

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Embodiment 1

[0084] This embodiment provides a method for realizing the comprehensive utilization of iron, vanadium and titanium by low-temperature reduction roasting of vanadium-titanium magnetite. Using the above-mentioned method, the process flow chart is as follows figure 1 shown. The specific details are as follows:

[0085] The main components of the vanadium-titanium magnetite fine powder used in this embodiment are shown in Table 1; the main components of the coal powder used as a reducing agent are shown in Table 2; Binder.

[0086] Vanadium-titanium magnetite fine powder, carbonaceous reducing agent, sodium bicarbonate, and binder are mixed according to the mass ratio of 100:18:31:5, mixed, and cold-pressed to obtain pellets. The pellets are ellipsoids with a particle size of 35 ~ 50mm. Dry on a continuous dryer, the drying air temperature is 300°C, stay for 30min, and the moisture content of the pellets is 1.8%.

[0087] The pellets enter the heating reduction device for sod...

Embodiment 2

[0095] This embodiment provides a method for realizing the comprehensive utilization of iron, vanadium and titanium by low-temperature reduction roasting of vanadium-titanium magnetite. Using the above-mentioned method, the process flow chart is as follows figure 1 shown. The details are as follows:

[0096] The main components of vanadium-titanium magnetite fine powder used in this embodiment are shown in Table 3; the coal powder used as reducing agent is shown in Table 4; the sodium bicarbonate agent is sodium bicarbonate with a purity greater than 95%, and the binder is an organic binder.

[0097] Vanadium-titanium magnetite fine powder, carbonaceous reducing agent, sodium bicarbonate, and binder are mixed according to the mass ratio of 100:21:48:8, mixed, and cold-pressed to obtain pellets. The pellets are ellipsoids with a particle size of 30-40mm. The pellets are dried on a continuous dryer, the drying air temperature is 300°C, the drying time is 30 minutes, and the mo...

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Abstract

The invention discloses a method for realizing comprehensive utilization of iron, vanadium and titanium through low-temperature reduction roasting of vanadium titano-magnetite, and belongs to the field of resource utilization of vanadium titano-magnetite. The problems of strong corrosion and high energy consumption caused in the existing vanadium titano-magnetite reduction process are solved. The method comprises the steps that vanadium titano-magnetite fine powder, a carbonaceous reducing agent, a sodium modifying agent and a binder are uniformly mixed and formed to obtain pellets, and the pellets are dried; the pellets are subjected to low-temperature sodium modification reduction, and an indirect heating device capable of heating the upper portions and the lower portions of materials is adopted by a reduction device; the reduced metallized pellets are refined to 100 meshes so as to carry out hydrolysis, and separation is carried out after hydrolysis to obtain a slag-iron mixture and first filtrate; magnetic separation on the slag-iron mixture is carried out to obtain slag and metal iron powder; primary carbon separation is carried out on the first filtrate, and filtering and separating are carried out to obtain SiO2 and Al2O3 precipitates and second filtrate; secondary carbon separation is carried out on the second filtrate, and filtering and separating are carried out to obtain ammonium metavanadate precipitates and third filtrate; and third-time carbon separation is carried out on the third filtrate. The method can realize green high-added-value utilization of vanadium, titanium and iron with low coal consumption.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of vanadium-titanium magnetite resources, in particular to a method for realizing comprehensive utilization of iron, vanadium and titanium by low-temperature reduction roasting of vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite is an important mineral resource in my country. After decades of research, it can be recovered by blast furnace, but the grade of titanium-containing slag in blast furnace is only about 20%, which is not easy to use. In addition, the comprehensive recovery rate of vanadium is only 70%. ~80% level. [0003] Some people in China have tried the non-blast furnace sodium reduction method. The typical method is to use a tunnel kiln for reduction. Sodium carbonate, coal powder, vanadium-titanium magnetite and other pressure balls are added to the silicon carbide tank and heated to 1150-1250 in the tunnel kiln. ℃ reduction, c...

Claims

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Application Information

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IPC IPC(8): C22B1/242C22B1/02C21B13/00C22B3/04C22B3/44C22B34/22C22B34/12B03C1/30
CPCC22B1/242C22B1/02C21B13/0066C21B13/008C22B3/04C22B3/44C22B34/22C22B34/1209B03C1/30
Inventor 郭培民孔令兵王磊林万舟周强
Owner 钢研晟华科技股份有限公司
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