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

Composite desulfurizer for molten iron desulphurization or semisteel desulphurization and process method thereof

A process method and technology for desulfurization of molten iron, which are applied in the field of metallurgical production, can solve the problems of inability to meet the smelting requirements of steel-making steel grades, low desulfurization efficiency, large splash, etc., and achieve high iron loss, low desulfurization efficiency, and reduced iron loss. Effect

Active Publication Date: 2017-09-29
PANGANG GRP PANZHIHUA STEEL & VANADIUM
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current desulfurization process is mixed injection desulfurization. When the desulfurizer is used for semi-steel desulfurization, it has the disadvantages of large splash, high iron loss, and low desulfurization efficiency, which cannot meet the needs of steelmaking steel smelting.

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

example 1

[0015] After the vanadium-titanium molten iron is blown through the converter to extract vanadium from the molten iron, vanadium-rich vanadium slag and sulfur-containing semi-steel are formed respectively. After the high-sulfur semi-steel enters the desulfurization station, the weight is 139.0 tons, the temperature is 1362°C, and the composition is: C3.54%, Mn0.02%, V0.022%, Si0.02%, S0.095%, P0.053 %, Ti0.004%, and the balance of iron and unavoidable impurities. Using the original mixing and injection equipment, the target sulfur is set to 0.020%, and 1042 kg of the composite desulfurizing agent of the present invention is added to perform injection desulfurization. During the spraying process, the splash is small, the flame is small, and there is no smoke and dust overflow. After the desulfurization is completed, use the slag removal machine to remove the desulfurization residue, and the time for the desulfurization residue to be removed is 5.5 minutes. After removing the ...

Embodiment 2

[0017] After the vanadium-titanium molten iron is blown through the converter to extract vanadium from the molten iron, vanadium-rich vanadium slag and sulfur-containing semi-steel are formed respectively. After the high-sulfur semi-steel enters the desulfurization station, the weight is 137.0 tons, the temperature is 1345°C, and the composition is: C3.56%, Mn0.02%, V0.031%, Si0.02%, S0.078%, P0.054 %, Ti0.003%, and the balance of iron and unavoidable impurities. Using the original composite injection equipment, the target sulfur is set to 0.008%, and 947 kg of the desulfurizing agent of the present invention is added to carry out injection desulfurization. During the spraying process, the splash is small, the flame is small, and there is no smoke and dust overflow. After the desulfurization is completed, use the slag removal machine to remove the desulfurization residue, and the desulfurization residue is removed within 5.0 minutes. After removing the slag, the semi-steel a...

example 3

[0019] The weight of vanadium-titanium molten iron after assembly is 138.5 tons, the temperature is 1275°C, and the composition is: C4.28%, Mn0.22%, V0.31%, Si0.15%, S0.072%, P0.053%, Ti0.15%, using 924 kg of the desulfurizer described in the present invention to carry out injection desulfurization. During the spraying process, the splash is small, the flame is small, and there is no smoke and dust overflow. After the desulfurization is completed, use the slag removal machine to remove the desulfurization residue, and the desulfurization residue is removed in 5.3 minutes. After removing the slag, the semi-steel after the desulfurization slag was removed was weighed, temperature measured and sampled for analysis. The weight of the semi-steel after the desulfurization slag was removed was 134.5 tons, the temperature was 1250°C, and the composition was C4.27% , Mn0.22%, V0.30%, Si0.15%, S0.007%, P0.53%, Ti0.15%, and the balance of iron and unavoidable impurities. Through calcul...

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 discloses a composite desulfurizer for molten iron desulphurization or semisteel desulphurization and a process method thereof and belongs to the technical field of metallurgical production. According to the composite desulfurizer for molten iron desulphurization or semisteel desulphurization and the process method thereof, during desulphurization, the iron loss is little, efficiency is high, and the steelmaking steel grade smelting need can be met. The composite desulfurizer is a powder mixture at least comprising CaO, Mg, Na2O, CaC2, Al, Al2O3 and SiO2. The process method comprises the step that the composite desulfurizer of the components is injected to the lower-middle portion of molten iron needing to be desulphurized or the lower-middle portion of semisteel needing to be desulphurized along with nitrogen through a nitrogen conveying pipeline.

Description

technical field [0001] The invention relates to a composite desulfurizer, in particular to a composite desulfurizer for molten iron desulfurization or semi-steel desulfurization, and belongs to the technical field of metallurgical production. The invention also relates to a process for desulfurizing molten iron or semi-steel by using the composite desulfurizer. Background technique [0002] In the prior art, the hot metal pretreatment process is a combination of desulfurization and vanadium extraction. However, due to the layout of the existing process, it is divided into two processes: first desulfurization and then vanadium extraction, and first vanadium extraction and then desulfurization. The semi-steel after vanadium extraction has high carbon and low temperature, and silicon, vanadium and manganese are the residual amount, and then desulfurization outside the furnace can accurately correspond to the type of steel being made. Since the net weight of blast furnace hot ...

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
IPC IPC(8): C21C7/064C21C1/02
CPCC21C1/025C21C7/0037C21C7/0645
Inventor 张家利王二军黄正华夏艳李扬洲解明科
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