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Molten iron vanadium-extracting calcium-controlling coolant and process therefor

A coolant and calcium process technology, applied in furnaces, hearth furnaces, furnace types, etc., can solve the problem of unstable calcium content in vanadium slag, unstable iron content in vanadium slag, unstable calcium oxide content in vanadium slag, affecting ferrovanadium Extraction rate and other problems, to shorten the blowing time, stabilize the calcium oxide content of vanadium slag, improve the grade and extraction rate of vanadium slag

Inactive Publication Date: 2006-06-21
HEBEI LUANHE IND GROUP
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Problems solved by technology

Including: vanadium-containing cast iron block, ordinary cast iron block, scrap steel, iron oxide scale, etc. The purpose is to control the blowing temperature to make it lower than the conversion temperature of blowing vanadium to ensure the carbon content, but correspondingly, the content of calcium oxide in vanadium slag is not high. Stable, but the standard of calcium content in vanadium pentoxide cannot be greater than 1%, exceeding the standard will affect the extraction rate of ferrovanadium
Background Art There are defects such as unstable vanadium extraction slag grade, unstable calcium content in vanadium slag and iron content in vanadium slag, which are easy to exceed the standard, cast iron block, scrap steel, and oxide scale, and there are also problems of large fluctuations in the composition of vanadium slag and excessive calcium and iron

Method used

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  • Molten iron vanadium-extracting calcium-controlling coolant and process therefor

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Embodiment Construction

[0010] Below by embodiment, the present invention will be further described.

[0011] In the embodiment, the iron fine powder is sampled in batches to analyze the calcium, total iron, and vanadium components. Similarly, the semi-steel scale is also to be analyzed in batches for calcium and iron oxide content components, and then the iron fine powder is separately analyzed. The powder and iron oxide scale are dried (drum type gas dryer), and the two are stacked separately after drying, and the ingredients of each batch are marked. After the ingredients are proportioned according to the batch, they are sent to the mixer. Add comprehensive agent (500kg for one batch) and mix well, then send it to the briquetting machine (double-roller briquetting machine Φ25mm) by belt conveyor, form it, put it into an iron basket (about 50kg), and transport it to the tunnel worker's gas drying room (rack type discharge car) drying for 2-3 hours, put into the silo for later use. Process flow of ...

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Abstract

The invention relates iron melt improving vanadium content and controlling calcium content cooling agent and the technology, specially relates the cooling agent of adjusting the proportion of cooling agent to stabilize calcium content in vanadium slag and the technology. The technology comprises the 56-60wt% iron scale, 30-40wt% iron concentrate powder containing vanadium, and 5-10wt% anchoring agent. The method stabilizes the calcium content and iron content in vanadium slag, and effectively solves the problems of great fluctuation of vanadium slag composition and superstandard calcium and iron. By controlling the thermoregulation material to meet the requirements of the improving vanadium temperature and calcium oxide content, the method improves the vanadium slag grade and extraction rate. The invention possesses the following characteristics: 1 shortening the converting time; 2 improving the vanadium slag grade and extraction rate, and stabilizing the calcium oxide content; 3 reducing the iron loss.

Description

Technical field: [0001] The invention relates to a coolant for extracting vanadium and controlling calcium from molten iron for blast furnace smelting and a process for extracting vanadium and controlling calcium from molten iron, in particular to a coolant for stabilizing the calcium content of vanadium slag by adjusting the ratio of the coolant and its use process. Background technique: [0002] At present, in blast furnace smelting, various coolants are used to adjust the temperature of vanadium-containing hot metal to extract vanadium. Including: vanadium-containing cast iron block, ordinary cast iron block, scrap steel, iron oxide scale, etc. The purpose is to control the blowing temperature to make it lower than the conversion temperature of blowing vanadium to ensure the carbon content, but correspondingly, the content of calcium oxide in vanadium slag is not high. Stable, but the standard of calcium content in vanadium pentoxide cannot be greater than 1%, exceeding t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/04
Inventor 刘恩平李永春
Owner HEBEI LUANHE IND GROUP
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