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

Charging material for blast-furnace smelting and blast-furnace smelting method

A blast furnace smelting and charge technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of lower ironmaking technical indicators, lower sinter quality, and high smelting costs, so as to improve blast furnace smelting efficiency, reduce smelting costs, and return ore low rate effect

Inactive Publication Date: 2018-01-16
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the demand for acid pellets more urgent, but the currently commonly used acid pellets are expensive and have a degree of reduction, resulting in poor strength, large dosage, and high smelting costs
As a result, the blast furnace smelting process has to take the method of reducing the alkalinity of sinter to alleviate the contradiction of insufficient acidic charge
However, as the basicity of sintered ore decreases (R<1.87), the quality of sintered ore decreases significantly, which reduces the technical indicators of ironmaking.

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] Ordinary iron concentrates are: iron concentrates without vanadium and titanium elements

[0041] Alkaline sintered ore: in parts by weight, the alkaline sintered ore consists of 45 parts of vanadium-titanium magnetite concentrate, 8 parts of ordinary iron fine powder, 10 parts of boron-containing iron ore powder, 4 parts of SiC powder, and 8 parts of CaO. Sintered sinter raw materials. The surface of the alkaline sinter is uniformly wrapped with SiC powder whose particle size is less than 350 mesh, accounting for more than 90%. The alkalinity of the alkaline sintered ore is 2.2.5; the drum strength of the alkaline sintered ore is measured: the transfer coefficient is greater than 80%.

[0042] Acid pellets: in parts by weight, the acid pellets are composed of pellets containing 55 parts of vanadium-titanium iron concentrate, 8-10 parts of ordinary iron concentrate, 1.5 parts of magnesite, 4 parts of dolomite and 1.5 parts of bentonite Mineral raw materials are roaste...

Embodiment 2

[0046] Ordinary iron concentrates are: iron concentrates without vanadium and titanium elements

[0047] Alkaline sintered ore: in parts by weight, the alkaline sintered ore consists of 40 parts of vanadium-titanium magnetite concentrate, 5 parts of ordinary iron fine powder, 5 parts of boron-containing iron ore powder, 1 part of SiC powder, and 10 parts of CaO. Sintered raw materials are sintered. The surface of the alkaline sinter is uniformly wrapped with SiC powder whose particle size is less than 350 mesh, accounting for more than 90%. Alkalinity is: 2.3. Measuring drum strength: the conversion coefficient is greater than 80%.

[0048] Acid pellets: in parts by weight, the acid pellets are made of pellet raw materials containing 50 parts of vanadium-titanium iron concentrate, 5 parts of ordinary iron concentrate, 2 parts of magnesite, 5 parts of dolomite and 1 part of bentonite Roasted. CaO content in dolomite > 40wt%, MgO content ≥ 28wt%, SiO 2 Content <8.0wt%; Alka...

Embodiment 3

[0052] Ordinary iron concentrates are: iron concentrates without vanadium and titanium elements

[0053] Alkaline sintered ore: in parts by weight, the alkaline sintered ore consists of 50 parts of vanadium-titanium magnetite concentrate, 10 parts of ordinary iron fine powder, 15 parts of boron-containing iron ore powder, 5 parts of SiC powder, and 6 parts of CaO. Sintered sinter raw materials. The surface of the alkaline sinter is uniformly wrapped with SiC powder whose particle size is less than 350 mesh, accounting for more than 90%. Alkalinity: 2.2. Measuring drum strength: the conversion coefficient is greater than 80%.

[0054] Acid pellets: in parts by weight, the acid pellets are made of pellet raw materials containing 60 parts of vanadium-titanium iron concentrate, 10 parts of ordinary iron concentrate, 1 part of magnesite, 3 parts of dolomite and 2 parts of bentonite Roasted. CaO content in dolomite > 40wt%, MgO content ≥ 28wt%, SiO 2 Content <8.0wt%; Alkalinity...

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 charging material for blast-furnace smelting and a blast-furnace smelting method. The charging material for blast-furnace smelting comprises components in parts by weight asfollows: 60-85 parts of alkaline sintered ore, 10-20 parts of acid pellets and 0-5 parts of geological minerals, wherein alkalinity of the alkaline sintered ore is 2.2-2.3, and alkalinity of the acidpellets is 0.2-0.4; the alkaline sintered ore is prepared from 40-50 parts by weight of vanadium bearing titanomagnetite, 5-10 parts by weight of common fine iron powder, 5-15 parts by weight of boron-bearing iron ore powder, 1-5 parts by weight of SiC powder and 6-10 parts by weight of CaO as raw materials through sintering; the acid pellets are prepared from 50-60 parts by weight of the vanadiumbearing titanomagnetite, 5-10 parts by weight of common fine iron powder, 1-2 parts by weight of magnesite, 3-5 parts by weight of dolomite and 1-2 parts by weight of bentonite as raw materials through sintering. According to the blast-furnace smelting method adopting the charging material for blast-furnace smelting, liquidity of iron slag can be guaranteed, a slag charge structure is changed, slag basicity is reduced, effective availability of the charging material for blast-furnace smelting is improved, blast-furnace smelting efficiency is improved, and smelting cost is reduced.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a blast furnace smelting charge and a blast furnace smelting method. Background technique [0002] The combination of high alkalinity sinter with acid pellets is currently recognized as an ideal charge structure in the world. With the rapid development of my country's iron and steel industry, the output of iron and steel continues to increase rapidly, and the demand for acid pellets in blast furnaces increases rapidly. Under the sintering conditions of high iron and low silicon (TFe grade 57%~59%, SiO2 4.0%~5.0%), with the increase of iron grade and the decrease of SiO2 content in sinter, the strength of sinter becomes worse and the particle size is smaller. Intensity, the basicity of sinter must be further improved. This makes the demand for acid pellets more urgent, but the currently commonly used acid pellets are expensive and have a degree of reduction, resul...

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 Applications(China)
IPC IPC(8): C21B5/02C22B1/243
Inventor 刘德安江青芳林刚杨波何益先张秋林张杰衡红
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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