CN103484596B - Half steel slag former and preparation method thereof and Semi-steel making method - Google Patents

Half steel slag former and preparation method thereof and Semi-steel making method Download PDF

Info

Publication number
CN103484596B
CN103484596B CN201310460321.5A CN201310460321A CN103484596B CN 103484596 B CN103484596 B CN 103484596B CN 201310460321 A CN201310460321 A CN 201310460321A CN 103484596 B CN103484596 B CN 103484596B
Authority
CN
China
Prior art keywords
steel
weight
slag
magnetic separation
slag former
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201310460321.5A
Other languages
Chinese (zh)
Other versions
CN103484596A (en
Inventor
陈炼
陈永
戈文荪
王建
曾建华
蒋龙奎
黄德胜
张强
彭友全
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Original Assignee
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd filed Critical Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority to CN201310460321.5A priority Critical patent/CN103484596B/en
Publication of CN103484596A publication Critical patent/CN103484596A/en
Application granted granted Critical
Publication of CN103484596B publication Critical patent/CN103484596B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a kind of half steel slag former and preparation method thereof and Semi-steel making method.The composition of described half steel slag former comprises the SiO of 40% ~ 45% by weight 2, CaO, the MnO of 2% ~ 5% of 15% ~ 20%, the FeO of the MgO of 5% ~ 8% and 20% ~ 35%.Described preparation method comprises: by by weight 35% ~ 45% dry method dust ash, the steel scoria magnetic separation powder of 10% ~ 15%, the quartz sand of 40% ~ 50% and 5% ~ 10% manganese ore mixing, to form mixture, steel scoria magnetic separation powder is that steelworks carries out the stewing process of heat and the iron-contained waste material obtained after magnetic separation to steel-making finishing slag; The binding agent that weight accounts for 5% ~ 8% of mixture weight is added in described mixture; Pelletizing is made by adding the mixture after binding agent.Of the present invention can effectively utilize steelworks slag processing to produce steel scoria magnetic separation powder and dry method dust ash, be conducive to comprehensive utilization of resources; When gained half steel slag former can promote semisteel smelting better, steelmaking slag is formed fast, is conducive to converter dephosphorization, controls converter and return sulphur.

Description

Half steel slag former and preparation method thereof and Semi-steel making method
Technical field
The invention belongs to field of iron and steel smelting, specifically, relate to a kind of half steel slag former for vanadium extraction half steel and preparation method thereof and a kind of Semi-steel making method using this half steel slag former.
Background technology
Usually, vanadium-bearing hot metal gained molten iron after extraction smelting of vanadium is called vanadium extraction half steel (also can referred to as half steel).The feature of vanadium extraction half steel comprises: carbon low (on average about 3.6%), silicon low (less than 0.01%), manganese low (less than 0.05%), and heat source insufficiency, slagging constituent content are low, and temperature comparatively molten iron is high, and the lower and initial stage slagging of slag oxidisability in early stage is more difficult.
Because semi-steel making slag making difficulty is large, more than during on-the-spot smelting operation, slag charge adds batch, make exhaust gas dust generation large, the control difficulty of control of lance position and carbon drop speed is very large.
Publication number is a kind of method that application discloses steelmaking slagging of CN102312037A, the method comprises: add in steel melting furnace by the half steel after vanadium extraction, and oxygen blast is blown wherein, in 2 minutes after blowing starts, relative to the half steel after 1 ton of vanadium extraction, by the lime of 6-8.5 kilogram, 4-7.5 kilogram high magnesium lime, the acid composite slag of the fusing assistant of 5-11.5 kilogram and 11-16 kilogram joins in steel melting furnace, in 8 minutes after forming first slag to blowing and starting, relative to the half steel after 1 ton of vanadium extraction, again the high magnesium lime of the lime of 6-8.5 kilogram and 4-7.5 kilogram is joined in steel melting furnace, continue blowing, obtain molten steel and finishing slag, described fusing assistant is refining ladle slag.
Publication number is a kind of method that application discloses steelmaking slagging of CN102312036A, half steel after vanadium extraction adds in steel melting furnace by the method, and oxygen blast is blown wherein, in 2 minutes after blowing starts, relative to the half steel after 1 ton of vanadium extraction, by the lime of 9-11 kilogram, the high magnesium lime of 9-11 kilogram, the acid composite slag of the fusing assistant of 3-8 kilogram and 11-14 kilogram joins in steel melting furnace, in 9 minutes after starting to blowing after forming first slag, relative to the half steel after 1 ton of vanadium extraction, again the high magnesium lime of the lime of 9-11 kilogram and 9-11 kilogram is joined in steel melting furnace, continue blowing, obtain molten steel and finishing slag, described fusing assistant is refining ladle slag.
The one that application discloses disclosed as CN101921891A utilizes machine burning mine tailing to assist semi-steel making slagging method, the method will produce machine burning mining tailing in sintering process, the machine burning mine tailing of the granularity 5-30mm filtered out is as semi-steel making slag former, during semi-steel making, after blowing starts between 0 ~ 2 minute, in stove, machine burning mine tailing is added, auxiliary Primary period rapid slagging according to 5 ~ 10kg/t steel.But, use machine burning mine tailing can increase the temperature loss of steelmaking process, be unfavorable for the reduction of steel technology.
Publication number be CN101033496 application discloses a kind of alkaline oxygen converter steelmaking slagging fluxing agent and preparation method thereof and slagging method, in this patent application, slag-making fluxing agent is calculated in mass percent, B 2o 35 ~ 10%, CaO45 ~ 50%, MgO20 ~ 25%, Al 2o 315 ~ 20%, Fe 2o 310 ~ 15%, during slag making, slag-making fluxing agent add-on is 2 ~ 10kg/t steel, fusing assistant adds in stove with slag making materials in batches, namely fall oxygen rifle start oxygen blown while, add the slag-making fluxing agent of first slag material (being generally 1/2nd of slag material total amount) and regulation add-on 1/2nd, i.e. 1 ~ 5kg/t steel; Blowing adds the slag-making fluxing agent of remainder when adding second batch slag material mid-term.
Therefore, a kind of half steel slag former being applicable to vanadium extraction half steel is needed badly.
Summary of the invention
The object of the invention is to solve at least one item in above-mentioned prior art problem.
Such as, an object of the present invention is to provide a kind of half steel slag former being applicable to vanadium extraction half steel and preparation method thereof and a kind of Semi-steel making method using this half steel slag former.
An aspect of of the present present invention provides a kind of half steel slag former, and the composition of described half steel slag former comprises the SiO of 40% ~ 45% by weight percentage 2, CaO, the MnO of 2% ~ 5% of 15% ~ 20%, the FeO of the MgO of 5% ~ 8% and 20% ~ 35%.
Another aspect provides a kind of method preparing half steel slag former, said method comprising the steps of: by by weight 35% ~ 45% dry method dust ash, the steel scoria magnetic separation powder of 10% ~ 15%, the quartz sand of 40% ~ 50% and 5% ~ 10% manganese ore mixing, to form mixture, wherein, described steel scoria magnetic separation powder is that steelworks carries out the stewing process of heat and the iron-contained waste material obtained after magnetic separation to steel-making finishing slag, and it contains the TFe of by weight more than 35%; The binding agent that weight accounts for 5% ~ 8% of mixture weight is added in described mixture; Pelletizing is made by adding the mixture after binding agent.
Another aspect of the present invention provides a kind of Semi-steel making method, described half steel is vanadium-bearing hot metal gained molten iron after extraction smelting of vanadium, and described method comprises using half steel slag former as above as slag former during semisteel smelting or the pelletizing that obtains using method described above as slag former during semisteel smelting.
Compared with prior art, technique effect of the present invention comprises: the steel scoria magnetic separation powder that can effectively utilize steelworks slag processing to produce and dry method dust ash, achieve refuse and effectively utilize, be conducive to the comprehensive utilization of resource; When gained half steel slag former can promote semisteel smelting better, steelmaking slag is formed fast, is conducive to converter dephosphorization, controls converter and return sulphur.
Embodiment
Hereinafter, half steel slag former of the present invention and preparation method thereof and Semi-steel making method will be described in detail in conjunction with exemplary embodiment.
The composition of half steel slag former according to an aspect of the present invention comprises the SiO of 40% ~ 45% by weight percentage 2, CaO, the MnO of 2% ~ 5% of 15% ~ 20%, the FeO of the MgO of 5% ~ 8% and 20% ~ 35%.Preferably, the composition of half steel slag former comprises the SiO of 42% ~ 44% by weight percentage 2, CaO, the MnO of 3% ~ 4% of 16% ~ 18%, the FeO of the MgO of 6% ~ 7% and 24% ~ 32%.Such as, half steel slag former of the present invention can by the SiO of 40% ~ 45% 2, CaO, the MnO of 2% ~ 5% of 15% ~ 20%, the FeO of the MgO of 5% ~ 8% and 20% ~ 35% and a small amount of impurity (such as, not higher than 5%) composition.
The method preparing half steel slag former according to a further aspect of the invention comprises the following steps: by by weight 35% ~ 45% dry method dust ash, the steel scoria magnetic separation powder of 10% ~ 15%, the quartz sand of 40% ~ 50% and 5% ~ 10% manganese ore mixing, to form mixture, wherein, described steel scoria magnetic separation powder is that steelworks carries out the stewing process of heat and the iron-contained waste material obtained after magnetic separation to steel-making finishing slag, and it contains the TFe of by weight more than 35%; The binding agent that weight accounts for 5% ~ 8% of mixture weight is added in described mixture; Pelletizing is made by adding the mixture after binding agent.Preferably, described mixture by by weight 38% ~ 42% dry method dust ash, the steel scoria magnetic separation powder of 12% ~ 14%, the quartz sand of 42% ~ 48% and 7% ~ 9% manganese ore mix obtained.
In the present invention, dry method dust ash refers to converter dry dedusting ash, in the present invention, manganese ore refer to mining out containing manganese raw ore, wherein, MnO weight percentage >18% in manganese ore.In the present invention, binding agent is the composition of the conventional binding agents such as clay, Mierocrystalline cellulose, diatomite or several binding agent.
In addition, in the present invention, quartz sand can contain the SiO of more than 95% by weight 2.
Contriver finds: because in half steel, slagging constituent content is low, FeO in the formation of first slag and first slag in semi-steel making nthere is very large relation, lime be made to melt scorification fast, FeO in first slag ncertain reasonable value must be reached.As FeO in first slag ncontent, lower than reasonable value, can bring many disadvantageous effects, such as, due to FeO to the dissolving of lime during semisteel smelting nto the effect reducing lime fusing point formation low melting component, FeO nthe low thermodynamic condition change that lime is melted of content; FeO nalso be very significant to reducing the effect of slag viscosity, the very few slag of its content will return dry, in half curdled appearance, loses sweetening power, therefore FeO nfirst be that impact with it on slag viscosity is associated on the positive solvency action of lime.Therefore, the composition of half steel slag former is set to the SiO comprising 40% ~ 45% by weight percentage by the present invention 2, CaO, the MnO of 2% ~ 5% of 15% ~ 20%, the FeO of the MgO of 5% ~ 8% and 20% ~ 35%, thus the characteristic of vanadium extraction half steel can be adapted to well, play: (1) shortens initial stage slag formation time, improve steelmaking slagging speed; (2) slag dephosphorization effect is improved; (3) effectively control steelmaking process molten steel and return sulphur; (4) improve the utilization ratio of CaO, accelerate the fusing of semi-steel making lime, reduce the technique effects such as lime consumption.
Comprise using half steel slag former as above as slag former during semisteel smelting according to the Semi-steel making method of another aspect of the invention.
In order to understand the present invention better, further illustrate the present invention below in conjunction with concrete example.
In one exemplary embodiment of the present invention, the method preparing half steel slag former realizes in the following way: with dry method dust ash, steel scoria magnetic separation powder, quartz sand, manganese ore for raw material, 35% ~ 45% dedusting ash, 10% ~ 15% steel scoria magnetic separation powder, 40% ~ 50% quartz sand, 5% ~ 10% manganese ore are mixed, additional 5% ~ 8% binding agent, then adopts pair roller pressure ball method to make pelletizing.Gained slag former composition can be: SiO 240% ~ 45%, CaO15% ~ 20%, MnO2% ~ 5%, MgO5% ~ 8%, FeO20% ~ 35% and be no more than 5% impurity, and total amount is 100%.
Example 1
45% dedusting ash, 10% steel scoria magnetic separation powder, 40% quartz sand, 5% manganese ore are mixed, additional 8% binding agent (Mierocrystalline cellulose and diatomite 1:1), adopt pair roller pressure ball method to make pelletizing, be half steel slag former.After testing, the composition of gained half steel slag former is: SiO 243%, CaO18%, MnO3%, MgO6%, FeO28% and 2% impurity.
Example 2
35% dedusting ash, 15% steel scoria magnetic separation powder, 40% quartz sand, 10% manganese ore are mixed, additional 5% binding agent (clay), adopt pressure ball method to make pelletizing.Gained slag former composition: SiO 241%, CaO16%, MnO5%, MgO8%, FeO27% and 3% impurity.
In sum, the steel scoria magnetic separation powder that the present invention can effectively utilize steelworks slag processing to produce and dry method dust ash, achieve refuse effectively to utilize, be conducive to the comprehensive utilization of resource, and steelmaking slag is formed fast when gained half steel slag former can promote semisteel smelting better, be conducive to converter dephosphorization, control converter and return sulphur.
Although describe the present invention in conjunction with exemplary embodiment above, those of ordinary skill in the art should be clear, when not departing from the spirit and scope of claim, can carry out various amendment to above-described embodiment.

Claims (4)

1. prepare a method for half steel slag former, it is characterized in that, said method comprising the steps of:
By by weight 35% ~ 45% dry method dust ash, the steel scoria magnetic separation powder of 10% ~ 15%, the quartz sand of 40% ~ 50% and 5% ~ 10% manganese ore mixing, to form mixture, wherein, described steel scoria magnetic separation powder is that steelworks carries out the stewing process of heat and the iron-contained waste material obtained after magnetic separation to steel-making finishing slag, and it contains the TFe of by weight more than 35%;
The binding agent that weight accounts for 5% ~ 8% of mixture weight is added in described mixture;
Make pelletizing by adding the mixture after binding agent, gained half steel slag former composition is: SiO 240% ~ 45%, CaO 15% ~ 20%, MnO 2% ~ 5%, MgO 5% ~ 8%, FeO 20% ~ 35% and be no more than 5% impurity, and total amount is 100%.
2. the method preparing half steel slag former according to claim 1, it is characterized in that, described mixture by by weight 38% ~ 42% dry method dust ash, the steel scoria magnetic separation powder of 12% ~ 14%, the quartz sand of 42% ~ 48% and 7% ~ 9% manganese ore mix obtained.
3. the method preparing half steel slag former according to claim 1, is characterized in that, described quartz sand contains the SiO of more than 95% by weight 2.
4. a Semi-steel making method, described half steel is vanadium-bearing hot metal gained molten iron after extraction smelting of vanadium, it is characterized in that, described method comprises using the pelletizing obtained as method as described in any one in claims 1 to 3 as slag former during semisteel smelting.
CN201310460321.5A 2013-09-30 2013-09-30 Half steel slag former and preparation method thereof and Semi-steel making method Active CN103484596B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310460321.5A CN103484596B (en) 2013-09-30 2013-09-30 Half steel slag former and preparation method thereof and Semi-steel making method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310460321.5A CN103484596B (en) 2013-09-30 2013-09-30 Half steel slag former and preparation method thereof and Semi-steel making method

Publications (2)

Publication Number Publication Date
CN103484596A CN103484596A (en) 2014-01-01
CN103484596B true CN103484596B (en) 2015-09-09

Family

ID=49825185

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310460321.5A Active CN103484596B (en) 2013-09-30 2013-09-30 Half steel slag former and preparation method thereof and Semi-steel making method

Country Status (1)

Country Link
CN (1) CN103484596B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103805736B (en) * 2014-02-10 2015-08-19 河北钢铁股份有限公司承德分公司 Tailings is utilized to assist method and the Semi-steel making method of steelmaking slagging in duplex technique
CN108018417A (en) * 2017-12-11 2018-05-11 攀枝花钢城集团有限公司 Steelmaking converter slagging agent and preparation method thereof
CN108148947A (en) * 2017-12-29 2018-06-12 汪逸凡 A kind of semisteel smelting slag former and preparation method thereof
CN109338039A (en) * 2018-12-05 2019-02-15 钢城集团凉山瑞海实业有限公司 A kind of steelmaking converter slag former and preparation method thereof
CN110937831A (en) * 2019-12-18 2020-03-31 攀枝花钢城集团有限公司 Process for reducing magnesium content in converter steel slag

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101613779A (en) * 2008-06-25 2009-12-30 攀枝花新钢钒股份有限公司 A kind of slag former and preparation method thereof and using method
CN102181610A (en) * 2011-04-01 2011-09-14 攀钢集团钢铁钒钛股份有限公司 Composite slagging agent for making semisteel, and preparation method and using method thereof
CN102304606A (en) * 2011-09-09 2012-01-04 攀钢集团攀枝花钢铁研究院有限公司 Slag former and slagging method for semisteel steelmaking
CN102912068A (en) * 2012-10-19 2013-02-06 攀钢集团攀枝花钢钒有限公司 Slagging constituent for semisteel converter steelmaking and manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101613779A (en) * 2008-06-25 2009-12-30 攀枝花新钢钒股份有限公司 A kind of slag former and preparation method thereof and using method
CN102181610A (en) * 2011-04-01 2011-09-14 攀钢集团钢铁钒钛股份有限公司 Composite slagging agent for making semisteel, and preparation method and using method thereof
CN102304606A (en) * 2011-09-09 2012-01-04 攀钢集团攀枝花钢铁研究院有限公司 Slag former and slagging method for semisteel steelmaking
CN102912068A (en) * 2012-10-19 2013-02-06 攀钢集团攀枝花钢钒有限公司 Slagging constituent for semisteel converter steelmaking and manufacturing method thereof

Also Published As

Publication number Publication date
CN103484596A (en) 2014-01-01

Similar Documents

Publication Publication Date Title
CN102312036B (en) Steelmaking and slagging method
CN103484596B (en) Half steel slag former and preparation method thereof and Semi-steel making method
CN100577822C (en) Method for extracting vanadium and removing phosphorus from vanadium-containing molten iron and steel-smelting technique using the same method
CN102399998B (en) Method for reducing and smelting titania slag by utilizing vanadium-titanium-iron ore concentrates in molten state
CN102912068B (en) Slagging agent for semisteel converter steelmaking and manufacturing method thereof
CN105525055B (en) A kind of control method of converter less-slag melting carbon period splash
CN101775451A (en) Blast-furnace smelting method for vanadium titano-magnetite
CN102264919A (en) Method for reclaiming iron and phosphorus from steelmaking slag
CN103498016B (en) Dephosphorization agent prepared by taking slag of decarbonization furnace as raw material and molten iron dephosphorization method
CN103642971B (en) Improve method and the Semi-steel making method of semi-steel making endpoint carbon content
CN103146873B (en) The semi-steel making slagging method of enrichment sludge ball and semi-steel making
CN101824503B (en) Method for producing vanadiferous pigiron by adopting vanadiferous converter steel slag
CN103088186B (en) Slag-making method for rapid dephosphorization of semisteel
CN103031400B (en) Technology for steelmaking through utilizing magnesium balls prepared from scraps and steel slag
CN104789732B (en) The method of semi-steel making converter slag-making
CN106755658A (en) A kind of method of the metallurgical also original production of titanium-containing slag
CN103725877B (en) A kind of method that pneumatic steelmaking dust circulation utilizes
CN103627846A (en) Method for performing direct alloying to molybdenum oxide for steelmaking
CN106755657A (en) A kind of method that titaniferous mixing slag metallurgy melting reduction is reclaimed
CN104017932A (en) Converter double-slag steelmaking method
CN104805249B (en) Double slags stay the slagging method of slag semi-steel making
CN101671756B (en) Composite fluxing medium for revolving furnace
CN103966387B (en) Adopt the method for semi-steel making
CN104120205B (en) A kind of recycle the method for ferrum in desulfurizing slag of hot metal
CN105506271A (en) Chromium ore composite pellet used for reduction in argon-oxygen refining furnace, production method and application thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant