Unlock instant, AI-driven research and patent intelligence for your innovation.

Electric furnace high-efficiency low-cost smelting process

A low-cost, high-efficiency technology, applied in the direction of electric furnace, process efficiency improvement, furnace, etc., can solve the problems of smelting cycle not reaching the smelting effect, high steel lime consumption, high iron oxide, etc., to shorten smelting time, reduce lime consumption, The effect of improving the tapping rate

Active Publication Date: 2021-02-26
YANCHENG LIANXIN IRON & STEEL CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. High lime consumption per ton of steel;
[0004] 2. High oxygen consumption;
[0005] 3. High iron oxide in slag;
[0006] 4. The smelting cycle has not reached the expected smelting effect

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric furnace high-efficiency low-cost smelting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] An electric furnace high-efficiency and low-cost smelting process, which comprises the following steps:

[0025] ——After each furnace is smelted, 10-15 tons of steel is left at the bottom of the furnace; before this process method, 20-30 tons of steel needs to be left, and the tapping rate is significantly improved.

[0026] ——Molten iron is mixed into the left steel, and the iron mixing speed is 3t / min;

[0027] ——After adding iron for 0.5-2 minutes, start to supply oxygen at a medium flow rate for 1 minute, then supply oxygen at a large flow rate, and end the end time of oxygen blowing 0.5-1 minute earlier, so that the carbon of molten steel is always controlled at 0.80% to 1.00% before the molten iron is mixed , the carbon content of molten steel at the end point is 0.07%; the current existing technical solutions generally start oxygen supply immediately after adding iron, and use low-flow oxygen supply of 500-1000m3 / h for the first minute, and then use high-flow oxy...

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 the technical field of steelmaking, in particular to an electric furnace high-efficiency low-cost smelting process. The electric furnace high-efficiency low-cost smelting process comprises the following steps that 10-15 tons of steel are reserved at the bottom of a furnace; molten iron is added, wherein the iron adding speed is 3 t / min; after the iron is added for 0.5-2 min, medium-flow oxygen supply is started for 1 min, then high-flow oxygen supply is started, the oxygen blowing terminal time is advanced by 0.5-1 min so as to enable molten steel carbon to be always controlled to be 0.80%-1.00% and terminal molten steel carbon to be 0.07% before the molten iron is added; when 1 / 3 of the molten iron is added at the initial stage of melting, 200-300kg of the first batch of lime is added, and 200-300kg of the second batch of lime is added at the final stage of melting; and clear sample detection is carried out in the oxidation period, and lime is supplemented inbatches according to the content of P in a detection result. According to the method, lime consumption and oxygen consumption per ton of steel are obviously reduced, the smelting time is shortened, early slag outflow is avoided, heat loss is reduced, the metal yield and the tapping rate are increased, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to an electric furnace high-efficiency and low-cost smelting process. Background technique [0002] At present, the electric furnace smelting process generally leaves a part of the steel after the steel is tapped, and then starts mixing iron, supplying oxygen, and decarburizing. According to the analysis of the slag samples in the early stage, there are the following problems in smelting with this process method: [0003] 1. High lime consumption per ton of steel; [0004] 2. High oxygen consumption; [0005] 3. High iron oxide in slag; [0006] 4. The smelting cycle has not yet reached the expected smelting effect. Contents of the invention [0007] The technical problem to be solved by the present invention is to provide a high-efficiency and low-cost electric furnace smelting process with low cost, high smelting efficiency and high tapping yield. [0008] The present...

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): C21C5/52
CPCC21C5/52Y02P10/20Y02P40/40
Inventor 谢锦官谢吉祥刁承民曾锦陈小平张宝富
Owner YANCHENG LIANXIN IRON & STEEL CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com