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Method for utilizing sludge containing vanadium and chromium

A technology of vanadium-chromium sludge and vanadium-chromium, which is applied in the field of utilization of vanadium-chromium-containing sludge, can solve the problems of high cost, poor treatment effect and high treatment cost, and achieve low cost, good treatment effect and low treatment cost Effect

Active Publication Date: 2013-06-05
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At home and abroad, we attach great importance to its treatment methods. Foreign countries mainly use expensive solidification deep burial or heat treatment, while domestic research is devoted to resource utilization. At present, the resource utilization technology developed is useful for glass colorants, cement, bricks, and production. Calcium magnesium phosphate fertilizer, etc. Although these methods have solved the problem of idle waste to a certain extent, many related technologies have not yet formed production capacity. Secondary pollution. In addition, the above treatment methods also need to invest a lot of manpower, material resources, and financial resources for deep processing, and the treatment cost is relatively high.

Method used

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  • Method for utilizing sludge containing vanadium and chromium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: The utilization method of the vanadium-chromium-containing sludge adopts the following specific process steps.

[0017] The vanadium-chromium-containing sludge is first baked, and then the dried sludge is added with 1wt% phenolic resin organic binder and 8wt% silicon carbide powder, processed into balls and baked again to obtain a compressive strength ≥ 600N / ball vanadium-chromium-containing mud balls, the main components of vanadium-chromium-containing mud balls are: CaO: 3%, Cr 2 o 3 : 10%, V 2 o 5 : 25%, SiO 2 <13%, P<0.030%, S<0.60%, moisture<0.5%. After the vanadium-chromium-containing mud balls are prepared, return the vanadium-chromium-containing mud balls to the refining process of the steelmaking LF furnace for utilization: when the vanadium-chromium-containing mud balls are added to the microalloying of vanadium and chromium in the LF furnace, the timing of adding them is selected in the LF furnace slag Add after the color turns yellow, and ...

Embodiment 2

[0018] Embodiment 2: The utilization method of this vanadium-chromium-containing sludge adopts the following specific process steps.

[0019] The vanadium-chromium-containing sludge is first baked, and then the baked sludge is added with 5wt% phenolic resin organic binder and 5wt% silicon carbide powder, processed into balls and baked again to obtain a compressive strength ≥ 600N / ball vanadium-chromium-containing mud balls, the main components of vanadium-chromium-containing mud balls are: CaO: 10%, Cr 2 o 3 : 15%, V 2 o 5 : 15%, SiO 2 <13%, P<0.030%, S<0.60%, moisture<0.5%. After the vanadium-chromium-containing mud balls are prepared, return the vanadium-chromium-containing mud balls to the refining process of the steelmaking LF furnace for utilization: when the vanadium-chromium-containing mud balls are added to the microalloying of vanadium and chromium in the LF furnace, the timing of adding them is selected in the LF furnace slag Add after the color becomes yellowis...

Embodiment 3

[0020] Embodiment 3: The utilization method of the vanadium-chromium-containing sludge adopts the following specific process steps.

[0021] The vanadium-chromium-containing sludge is first baked, and then the baked sludge is added with 3wt% phenolic resin organic binder and 2wt% silicon carbide powder, processed into spherical objects and baked again to obtain a compressive strength ≥ 600N / ball vanadium-chromium-containing mud balls, the composition weight percentage of vanadium-chromium-containing mud balls is: CaO: 8%, Cr 2 o 3 : 12%, V 2 o 5 : 18%, SiO 2<13%, P<0.030%, S<0.60%, moisture<0.5%. After the vanadium-chromium-containing mud balls are prepared, return the vanadium-chromium-containing mud balls to the refining process of the steelmaking LF furnace for utilization: when the vanadium-chromium-containing mud balls are added to the microalloying of vanadium and chromium in the LF furnace, the timing of adding them is selected in the LF furnace slag Add after the ...

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Abstract

The invention discloses a method for utilizing sludge containing vanadium and chromium. The method disclosed by the invention comprises the following steps of: drying the sludge containing vanadium and chromium, then adding an organic binding agent and silicon carbide powder, processing to form balls, and then baking again to obtain mud balls containing vanadium and chromium; and returning the mud balls containing vanadium and chromium to a steelmaking LF (Ladle Furnace) refining process, reducing Cr and V elements of Cr2O3 and V2O5 oxides in the mud balls containing vanadium and chromium by utilizing an LF, and then microallying the mud balls containing vanadium and chromium in molten steel. According to the method, the sludge containing vanadium and chromium is dried and made into balls, so that the treatment cost is low; and the Cr and V elements are reduced and converted into steelmaking alloying beneficial elements in a steelmaking internal refining process and are microalloyed in the molten steel. The method disclosed by the invention is taken as a harmless treatment manner of the sludge containing vanadium and chromium, the sludge treatment cost is reduced, harm of heavy metal elements in discharged sludge to the environment is reduced, the method disclosed by the invention has the characteristics of good treatment effect, energy conservation, environmental friendliness and low cost, and can be used for fully utilizing alloy in the sludge containing vanadium and chromium, so that the effect of producing low alloy steel by microalloying is achieved.

Description

technical field [0001] The invention relates to a sludge treatment technology, in particular to a method for utilizing vanadium-chromium-containing sludge produced by a vanadium chemical plant. Background technique [0002] At present, the production process of metallurgical enterprises mainly smelting vanadium-titanium magnetite is generally: blast furnace vanadium-containing molten iron - converter vanadium extraction (obtain vanadium slag, vanadium slag sent to vanadium chemical plant to produce vanadium products) - semi-steel steelmaking - molten steel Refining-continuous casting-steel rolling, as can be seen from the above process flow, the vanadium-containing molten iron is extracted from the converter to obtain the intermediate product vanadium slag and semi-steel, the vanadium slag is used to produce vanadium products, and the semi-steel continues to make steel to produce cast billets. Vanadium chemical plants use vanadium slag to produce vanadium iron, vanadium-nitr...

Claims

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Application Information

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IPC IPC(8): C22B1/244C21C7/00
Inventor 国富兴张兴利韩春良翁玉娟王金星杨坤
Owner HEBEI IRON AND STEEL
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