Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Mixed Blowing Gas Supply Method for Vanadium Extraction and Nitrogen in Converter

A converter and vanadium oxygen technology, applied in the field of metallurgy, can solve the problems of difficult semi-steel quality and poor quality control of semi-steel, and achieve the effect of reducing oxygen supply intensity, reducing oxygen supply intensity, and increasing cooling intensity

Active Publication Date: 2021-02-09
PANGANG GRP PANZHIHUA STEEL & VANADIUM
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the semi-steel quality of the vanadium-extracted semi-steel under different molten iron conditions is difficult to control and the quality of the vanadium-extracted semi-steel in the low-carbon, low-silicon and low-temperature molten iron converter is poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Vanadium extraction Converter for vanadium extraction, molten iron loading 220 tons, molten iron carbon 4.50%, silicon 0.21%, temperature 1220°C, top-blown oxygen, bottom-blown nitrogen, top-blown oxygen oxygen supply intensity 2.80m 3 / h·t, pressure 0.80MPa, bottom blowing nitrogen supply strength 0.050m 3 / h·t, add 7.2 tons of coolant. After 2.3 minutes of oxygen supply, oxygen is mixed with nitrogen, and the gas supply intensity of the sum of oxygen and nitrogen is 2.95m 3 / h·t, the ratio of nitrogen supply intensity to the sum of oxygen and nitrogen is 35%, and the pressure after oxygen is mixed with nitrogen is 0.85Mpa. After blowing for 6 minutes and 45 seconds, the blowing ends, and the oxygen is turned off during the oxygen lance, and then the nitrogen is turned off. The temperature of the prepared semi-steel is 1385°C, the carbon in the semi-steel is 3.82%, and the vanadium in the semi-steel is 0.025%.

Embodiment 2

[0042] Vanadium extraction Converter for vanadium extraction, molten iron loading 141 tons, molten iron carbon 4.15%, silicon 0.18%, temperature 1250°C, top-blown oxygen, bottom-blown nitrogen, top-blown oxygen oxygen supply intensity 2.14m 3 / h·t, pressure 0.75MPa, bottom blowing nitrogen supply strength 0.045m 3 / h·t, add 4.5 tons of coolant. After 3.15 minutes of oxygen supply, oxygen is mixed with nitrogen, and the gas supply intensity of the sum of oxygen and nitrogen is 2.20m 3 / h·t, the ratio of nitrogen supply intensity to the sum of oxygen and nitrogen is 20%, and the pressure after oxygen is mixed with nitrogen is 0.80MPa. After blowing for 6 minutes and 15 seconds, the blowing is over, and the oxygen is turned off during the oxygen lance, and then the nitrogen is turned off. The temperature of the prepared semi-steel is 1380°C, the carbon in the semi-steel is 3.72%, and the vanadium in the semi-steel is 0.022%.

Embodiment 3

[0044] Vanadium extraction converter, loading capacity of molten iron 300 tons, molten iron carbon 4.45%, silicon 0.20%, temperature 1330 ℃, top blowing oxygen, bottom blowing nitrogen, bottom blowing nitrogen gas supply intensity 0.055m 3 / h·t, add 12.3 tons of coolant. Turn on the nitrogen switch first, turn on the oxygen switch when the oxygen gun is lowered, the gas supply intensity of the sum of oxygen and nitrogen is 3.00m 3 / h·t, the ratio of nitrogen supply intensity to the sum of oxygen and nitrogen is 50%. After blowing for 5 minutes and 50 seconds, the blowing is over, and the oxygen is turned off during the oxygen lance, and then the nitrogen is turned off. The temperature of the prepared semi-steel is 1390°C, the carbon in the semi-steel is 3.75%, and the vanadium in the semi-steel is 0.028%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a vanadium-extracting oxygen and nitrogen mixed blowing gas supply method for a converter. Oxygen is blown from the top. The method comprises the following steps that a, sampling is carried out, wherein temperature of molten iron is measured, sampling inspection is carried out, and the temperature of the molten iron and chemical components are obtained; b, correcting is carried out, wherein the temperature is corrected according to the components of the molten iron, and the calculation temperature of the molten iron is obtained; c, calculation is carried out, wherein time for mixing nitrogen into top oxygen is calculated according to the calculation temperature of the molten iron; d, the converter is adopted, wherein iron conversion is carried out through the converter, and an oxygen reducing gun carries out oxygen blowing; e, nitrogen is mixed, wherein the nitrogen is mixed into the top oxygen according to the calculated nitrogen mixing time; f, the temperature of a furnace hearth reaches the final temperature, and the oxygen and the nitrogen are closed. According to the method, the top oxygen blowing gun adopts pure oxygen blowing, vanadium in the molteniron can be oxidized fully, the nitrogen is mixed into the oxygen, the oxygen supply intensity is reduced, the cooling strength is improved, the rising speed of the temperature of the molten iron is delayed, the vanadium is oxidized fully, meanwhile, the oxidization speed of carbon in the molten iron is reduced, and the purposes of vanadium removing and carbon preserving are achieved.

Description

technical field [0001] The invention relates to a mixed blowing gas supply method for vanadium extraction in a converter, which belongs to the technical field of metallurgy. Background technique [0002] China is a big country of vanadium-titanium magnetite, which mainly obtains vanadium-containing molten iron through blast furnace smelting vanadium-titanium magnetite. The main methods for extracting vanadium from vanadium-containing molten iron at home and abroad include atomized vanadium extraction adopted by Panzhihua Iron and Steel Co., Ltd. in China, and Chusov metallurgy in Russia. The vanadium extraction method of the air bottom-blown converter, the vanadium extraction method of the top-bottom double-blown converter, the shaking bag vanadium extraction method adopted by South Africa Highveld Steel Vanadium Company, and the oxygen-blown molten iron oxygen extraction method adopted by New Zealand Steel Company, among which the top The method of extracting vanadium by bo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/35
Inventor 黄正华杨森祥王二军张家利王云宽唐勇明陈炼
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com