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Preparation method of vanadium titanomagnetite hot briquette

A technology of vanadium-titanium magnetite and hot briquetting, applied in furnaces, shaft furnaces, furnace types, etc., can solve problems that are not conducive to energy saving and coke reduction of blast furnaces, increase sintering costs, increase production costs, etc., and achieve good market application prospects , strong adaptability of raw materials, and the effect of improving the level of smelting

Active Publication Date: 2016-04-13
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

[0004] Vanadium-titanium ore sintering must be sintered with ore, that is, a certain amount of rich lump ore must be added during the sintering process of vanadium-titanium ore. This method increases the cost of sintering. At the same time, the sintering temperature is high during the sintering process, making it difficult to sinter and pollute the vanadium-titanium ore. serious
In addition, when the vanadium-titanium sinter enters the blast furnace for smelting, due to the presence of more hard and brittle perovskite inside, the vanadium-titanium sinter entering the blast furnace is seriously pulverized, which is not conducive to the improvement of the air permeability of the blast furnace
In addition, the difficult reduction of vanadium-titanium sinter and the viscosity of blast furnace slag greatly increase the load of the blast furnace, which is not conducive to energy saving and coke reduction in the blast furnace smelting process
When the vanadium-titanium oxide pellets are smelted in the furnace, although they have high strength at room temperature, they have the problem of reduction expansion and pulverization under high temperature conditions, resulting in a large degree of fragmentation of the vanadium-titanium oxide pellets in the furnace, which also deteriorates the blast furnace. Air permeability is not conducive to the reduction of energy consumption in blast furnace production
Vanadium-titanium cold-solidified carbon-containing pellets are generally used in the smelting process of the rotary hearth furnace, but because a large amount of binder is added in the preparation process, it is not only not conducive to the later melting of the electric furnace, but also its production cost is also reduced. greatly increased
At the same time, high-temperature loss of viscosity of vanadium-titanium cold-consolidated pellets is not conducive to rotary hearth furnace smelting

Method used

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  • Preparation method of vanadium titanomagnetite hot briquette
  • Preparation method of vanadium titanomagnetite hot briquette
  • Preparation method of vanadium titanomagnetite hot briquette

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, the vanadium-titanium magnetite, bituminous coal, and metallurgical lime are crushed and screened, and then the carbon ratio is (FC / O) of 0.8, that is, the vanadium-titanium magnetite is 80.24wt%, the bituminous coal is 18.06wt%, and the metallurgical The proportion of lime is 1.70wt% after mixing. The composition of the vanadium-titanium magnetite of this embodiment is shown in Table 1. The vanadium-titanium magnetite has a particle size of less than 0.15mm, and the vanadium-titanium magnetite with a particle size of less than 0.074mm accounts for the total vanadium-titanium magnetite by volume percentage. 40.86% of iron ore. The composition of the bituminous coal in this embodiment is shown in Table 2, wherein the colloidal layer index of the bituminous coal is 11, the particle size of the bituminous coal is less than 0.15mm, and the bituminous coal with the particle size less than 0.074mm accounts for 70.34% of the total bituminous coal by volume percentage. M...

Embodiment 2

[0022] First, the vanadium-titanium magnetite, bituminous coal, and metallurgical lime are crushed and screened, and then the carbon ratio (FC / O) is 1.2, that is, the vanadium-titanium magnetite is 72.24wt%, and the coal powder is 23.63wt%. The proportion of metallurgical lime is 4.13wt% after mixing, so as to obtain a uniformly mixed material. Wherein, the component content and particle size composition of each component in the uniformly mixed material are the same as those in Example 1.

[0023] Second, heat the uniformly mixed materials so that the temperature of the uniformly mixed materials after heating is 200°C. After that, the heated material is hot pressed to form an ellipsoidal vanadium-titanium magnetite hot-pressed block with a size of 21mm×19mm×13mm. Among them, the linear pressure of the roller ball press is 6.0t / cm. The main chemical composition of the hot-pressed vanadium-titanium magnetite obtained after pressing is shown in Table 4, where the basicity of the h...

Embodiment 3

[0027] First, the vanadium-titanium magnetite, bituminous coal, and metallurgical lime are crushed and screened, and then the carbon ratio is (FC / O) of 1.4, that is, the vanadium-titanium magnetite is 70.22wt%, and the coal powder is 28.15wt%. The metallurgical lime is mixed with a proportion of 1.63wt% to obtain a uniformly mixed material. Wherein, the component content and particle size composition of each component in the uniformly mixed material are the same as those in Example 1.

[0028] Second, heat the uniformly mixed materials so that the temperature of the uniformly mixed materials after heating is 280°C. After that, the heated material is hot pressed to form an ellipsoidal vanadium-titanium magnetite hot-pressed block with a size of 38mm×30mm×173mm. Among them, the linear pressure of the roller ball press is 6.0t / cm. The main chemical components of the hot-pressed vanadium-titanium magnetite obtained after pressing are shown in Table 5, wherein the alkalinity of the ...

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Abstract

The invention discloses a method for preparing hot briquettes of vanadium titanium magnetite. The method includes the following steps: (a) crushing and screening vanadium titanium magnetite, coal powder and flux; (b) crushing and screening The final vanadium-titanium magnetite powder, coal powder and flux are calculated and proportioned according to the proportions of 60wt% ~ 80wt%, 20wt% ~ 40wt% and 0wt% ~ 10wt% respectively, and the prepared raw materials are fully mixed to prepare Obtain the first material; (c) heat the first material to a temperature of 100°C to 300°C, and use a hot pressing device to press it into a size of (20~40) mm × (15~30) mm The second material is ellipsoidal particles of ~1100℃, time is 5h~7h. The preparation method of vanadium-titanium magnetite hot briquetting according to the present invention has the characteristics of strong raw material adaptability, high production efficiency, low energy consumption, low cost, etc., and is helpful to improve the smelting level of vanadium-titanium magnetite in my country, and It has good market application prospects.

Description

Technical field [0001] The invention belongs to the technical field of comprehensive utilization of metallurgical resources, and is specifically a preparation method of a vanadium-titanium magnetite hot briquette. Background technique [0002] Vanadium and titanium are world-recognized important strategic resources and important material guarantees for national economic development and national security. They are widely used in metallurgy, chemical industry, aerospace, national defense and military fields, while vanadium-titanium magnetite is the most important resource for vanadium and titanium. Important carriers are widely distributed in my country's Panxi, Chengde, Hanzhong, Xiangyang and other places, with abundant reserves, exceeding 10 billion tons in Panzhihua alone. However, in view of the requirements of the existing processing and utilization industrial processes on the grades of the required raw materials, these vanadium-titanium magnetites are all low-grade minerals, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/212C22B1/214
Inventor 储满生柳政根赵伟唐珏王宏涛汤雅婷冯聪
Owner NORTHEASTERN UNIV LIAONING
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