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

Molten iron mechanical stirring desulfurization method based on bottom blowing powder

A technology of mechanical stirring and molten iron, which is applied in the field of desulfurization of molten iron before converter steelmaking, can solve the problems of unsatisfactory, loss of blade effect, poor entrainment and dispersion effect, etc., to promote turbulent flow, curb concentric rotation, prolong Effect of entrainment cycle stroke

Active Publication Date: 2020-06-09
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of poor entrainment and dispersion effect of desulfurizer in molten iron in the existing KR stirring method, and the improved method wears the blades of the stirrer and the effect is still unsatisfactory, and provides a step-by-step molten iron KR stirring desulfurization method, injecting desulfurizing agent from a specific position at the bottom and controlling nitrogen injection to achieve the purpose of improving the desulfurization 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
  • Molten iron mechanical stirring desulfurization method based on bottom blowing powder
  • Molten iron mechanical stirring desulfurization method based on bottom blowing powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of mechanical stirring desulfurization method of molten iron based on bottom blowing powder of the present embodiment, its steps are:

[0038] Step 1. Slagging off the molten iron until the exposed area of ​​the molten iron surface reaches more than 60%, measuring the depth of the liquid surface, and measuring temperature and sampling.

[0039] Step 2. Insert the agitator 1 into the molten iron. The insertion depth of the agitator 1 is 30% higher than that in the conventional KR method, and start to rotate. The agitator 1 is an agitator with a conventional blade structure.

[0040] Step 3. After the speed of the agitator 1 is increased to the working speed, spray the desulfurizer into the molten iron from the bottom of the molten iron tank 2:

[0041] Specifically, install a slit-type powder-spraying ventilation brick 3 at the bottom of the molten iron tank 2, and the distance between the installation position of the ventilation brick 3 and the center of the bott...

Embodiment 2

[0050] A kind of mechanical stirring desulfurization method of molten iron based on bottom blowing powder of the present embodiment, its steps are:

[0051] Step 1. Remove slag from the molten iron until the exposed area of ​​the molten iron surface reaches more than 60%, measure the depth of the liquid surface, and measure temperature and sample;

[0052] Step 2. Insert the agitator 1 into the molten iron. The insertion depth of the agitator 1 is 10% higher than that in the conventional KR method, and start to rotate, wherein the agitator 1 is an agitator with a conventional blade structure;

[0053] Step 3: After the rotating speed is increased to the working speed, the desulfurizer is sprayed into the molten iron from the bottom of the molten iron tank 2; wherein, the breathable brick 3 is installed at the center of the tank bottom, and the mass percentage components of the desulfurizer are: CaO: 58%, Al 2 o 3 : 14%, SiO 2 : 4%, MgO: 10%, CaF 2 : 2%, soda ash: 3.5%, K 2...

Embodiment 3

[0057] A kind of mechanical stirring desulfurization method of molten iron based on bottom blowing powder of the present embodiment, its steps are:

[0058] Step 1. Remove slag from the molten iron until the exposed area of ​​the molten iron surface reaches more than 60%, measure the depth of the liquid surface, and measure temperature and sample;

[0059] Step 2. Insert the agitator 1 into the molten iron. The insertion depth of the agitator 1 is 20% higher than that in the conventional KR method, and start to rotate, wherein the agitator 1 is an agitator with a conventional blade structure;

[0060] Step 3: After the rotating speed is increased to the working rotating speed, the desulfurizing agent is sprayed into the molten iron from the bottom of the molten iron tank 2; wherein, the breathable brick 3 is installed in the center of the tank bottom, and the mass percentage components of the desulfurizing agent are: CaO: 59%, Al 2 o 3 : 13%, SiO 2 : 3%, MgO: 10.5%, CaF 2 :...

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 molten iron mechanical stirring desulfurization method based on bottom blowing powder, and belongs to the technical field of molten iron external desulfurization before converter steelmaking. The molten iron mechanical stirring desulfurization method based on the bottom blowing powder comprises the steps that 1, molten iron is slagged off, the liquid level depth is measured, and temperature measuring and sampling are conducted; 2, a stirrer is inserted into the molten iron, the inserting depth is larger than that of a conventional KR method, and rotating starts to beconducted; 3, after the rotating speed is increased to the working rotating speed, a desulfurization agent is sprayed into the molten iron from the bottom of a molten iron tank; 4, after the desulfurization agent is spray-blown to a specified value, desulfurization agent spray-blowing is stopped, and nitrogen gas is spray-blown instead; and 5, the nitrogen gas is spray-blown and stirred till desulfurization is finished, and slagging, temperature measuring and sampling are conducted again. According to the molten iron mechanical stirring desulfurization method based on the bottom blowing powder, a transparent brick is arranged at the specified position of the bottom of the molten iron tank, the desulfurization agent is spray-blown into the molten iron tank from the position, the particle size of the desulfurization agent can be smaller, and the thermodynamic condition of a desulfurization reaction is improved; and in addition, the inserting depth of the stirrer can be larger, therefore,the floating stroke of the desulfurization agent is increased, and the stirring, mixing and dispersing area of a molten bath is widened.

Description

technical field [0001] The invention relates to the technical field of external desulfurization of molten iron before converter steelmaking, in particular to a mechanical stirring desulfurization method for desulfurization pretreatment of molten iron. Background technique [0002] Mechanical agitation desulfurization of molten iron is through the rotation and agitation of the agitator inserted into the molten iron in the molten iron tank, so that the molten iron and desulfurizer are mixed and contacted for desulfurization. There are mainly Rhine method and KR (Kambara Reactor) method. The agitators used in these two methods of mechanical stirring desulfurization of molten iron are composed of a rotating shaft and stirring blades. The four stirring blades are evenly arranged in a cross shape along the circumference of the rotating shaft, and the agitator is inserted into the molten iron along the center line of the molten iron tank; the difference is only in the agitator The ...

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): C21C7/064C21C1/02
CPCC21C1/025C21C7/0645
Inventor 李明晖
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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