CN107760870A - A kind of preparation method of welding reduced ilmenite - Google Patents
A kind of preparation method of welding reduced ilmenite Download PDFInfo
- Publication number
- CN107760870A CN107760870A CN201710972491.XA CN201710972491A CN107760870A CN 107760870 A CN107760870 A CN 107760870A CN 201710972491 A CN201710972491 A CN 201710972491A CN 107760870 A CN107760870 A CN 107760870A
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- CN
- China
- Prior art keywords
- ilmenite
- preparation
- welding
- reduced
- reduced ilmenite
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- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
- C22B5/14—Dry methods smelting of sulfides or formation of mattes by gases fluidised material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
Abstract
The invention belongs to welding material preparation field, and in particular to a kind of preparation method of welding reduced ilmenite.The technical problems to be solved by the invention are to provide the preparation method of a welding reduced ilmenite, comprise the following steps：Ilmenite is aoxidized in fluidizing reactor in 800~900 DEG C, and reduced in 1050~1150 DEG C, material then is cooled into room temperature can obtain reduced ilmenite.The ilmenite function admirable that the inventive method is prepared, can improve welding material welding performance.
Description
Technical field
The invention belongs to welding material preparation field, and in particular to a kind of preparation method of welding reduced ilmenite.
Background technology
Substantial amounts of titanium system product is used in welding material coating, mainly plays fluxing effect, while the stream of slag can be improved
Dynamic property, promote the aggregation of weld metal reduzate and they are rejected in slag.Increase TiO in coating2Relative amount meeting
Skull is easily come off, effectively shorten slag solidification temperature range, slag is formed so-called " short slag ", while also have one
Fixed stabilising arc effect.Titanium system product is mainly based on titanium dioxide and rutile in the welding rod of early stage, in current welding material coating
The titanium system product of addition mainly has synthetic rutile, titanium dioxide, ilmenite, four kinds of reduced ilmenite.
Wherein, the addition of reduced ilmenite has tranquil Well-recovered, arc stability, molten bath, increase deposition efficiency, electric arc
The soft, premium properties such as appearance of weld is attractive in appearance, slag covers.Further, since its steady sources, moderate, it has also become general
The main raw material(s) of logical lime-titania type and high titanium oxide type electrode coating.
Traditional reduced ilmenite production technology can be divided into tunnel cave technique, " steamed bun " firer skill and revolution by its production equipment
Firer's skill, its principle is to be layered natural ilmenite and reducing agent, desulfurizing agent by a certain percentage to be placed in special terrine, by outer
Heating makes material in tank be warming up to 1150 DEG C or so the generation serial reactions such as redox and desulfurization, by the Fe in ilmenite2O3And
FeO changes into Fe, through broken, screening and magnetic separation separation as reduced ilmenite after cooling.But traditional reduced ilmenite production
Technique has big floor space, resource, energy-output ratio is big, yield is small and product quality stability is relatively lower.
The content of the invention
The invention provides a kind of preparation method of welding reduced ilmenite.This method comprises the following steps：By ferrotianium
Ore deposit carries out oxidation reaction at 800~900 DEG C, then carries out 2~3h of reduction reaction at 1050~1150 DEG C again, is subsequently cooled to room
Temperature.
Specifically, in the preparation method of above-mentioned welding reduced ilmenite, the ilmenite is Panzhihua Region ilmenite.
Wherein grade of titanium dioxide is 40% or so.
Preferably, in the preparation method of above-mentioned welding reduced ilmenite, the ilmenite granularity is -40~+160 mesh.
Specifically, in the preparation method of above-mentioned welding reduced ilmenite, the oxidation time is 20~30min.
Preferably, in the preparation method of above-mentioned welding reduced ilmenite, device therefor is fluidizing reactor.
Further, in the preparation method of above-mentioned welding reduced ilmenite, the oxidation or reduction when fluidizing gas
Flow is 2~3m3/min。
The inventive method can use the ilmenite of the impurity element symbiosis such as Panzhihua local vanadium titanium as raw material, by setting oxygen
Impurity element S in chemical industry sequence removing ilmenite, being avoided using gas-based reduction when traditional reduced ilmenite produces needs to add
The drawbacks of resource consumption and later stage caused by reducing agent and desulfurizing agent need decarburization etc. to handle.Fluidization technology is used for titanium by the present invention
Iron ore pre-oxidizes-reduced process, and more existing reduced ilmenite production technology, which has, enhances reaction heat transfer, mass-transfer efficiency, lifting
Many advantages, such as reaction speed and technology stability, automaticity is high, and labor intensity is small.The reduction titanium that the present invention is produced
Iron ore cost is low, yield is big and stable components, for the existing reduced ilmenite in market, have larger economic benefit and
Competitive advantage；Meanwhile the comprehensive utilization to Panzhihua Region ilmenite opens a new way, there is larger society's effect
Benefit.
Embodiment
The present invention is engaged technology using oxidationreduction, made primarily directed to the characteristic of Panzhihua Region ilmenite
It is standby to have obtained welding reduced ilmenite, comprise the following steps that：
1st, Panzhihua Region TiO is chosen2The ilmenite that grade is 40% or so is (because welding material requires S, P as far as possible
It is low, therefore raw material ilmenite selection S, P content are as low as possible)；
2nd, sizing is carried out to ilmenite, chooses ilmenite granularity between -40~+160 mesh；
3rd, ilmenite is added in fluidizing reactor, and air is passed through into reactor, oxidizing temperature is 800~900
DEG C, oxidization time is 20~30min；
4th, air in reactor is replaced with nitrogen, is subsequently passed CO gases and reduction treatment is carried out to ilmenite, also
Former temperature is 1050~1150 DEG C, and the recovery time is 2~3h, and reduction temperature and time cooperate, and obtain the weldering for meeting standard
Connect and use reduced ilmenite；
5th, after reduction reaction terminates, material is air-cooled to room temperature in the reactor.
The inventive method is first pre-oxidized ilmenite, ferrous iron is oxidized in oxidizing process according to property of raw material
Ferric iron, while the original mineral structure of ilmenite is destroyed, and occurs a large amount of micropores inside particle, so as to reduce reduction process
Resistance to mass tranfer of the middle gas inside particle, strengthen gas-based reduction process.Simultaneous oxidation process can effectively remove ilmenite
In S elements.So ilmenite pre-oxidation can accelerate the rate of reduction of iron in ilmenite, the metallization of reduzate iron is improved
Rate.
Because fluidizing reactor has, floor space is small, high mass transfer, heat transfer efficiency, and aoxidizes and restoring operation can be with
Switch at any time, production efficiency is high.It is preferred, therefore, that the equipment that fluidizing reactor is implemented as the inventive method.
If oxidizing temperature is too high, easily sinter；Temperature is too low, and oxidation and desulfurized effect are again bad.So control oxygen
It is 800~900 DEG C to change reaction temperature.
Embodiment 1
Panzhihua Ilmenite 200g of the granularity in -40~+160 mesh is weighed, ilmenite is added in fluidizing reactor.
Oxidizing roasting 25min at a temperature of 850 DEG C, it is passed through nitrogen and replacement Treatment is carried out to air.3h is reduced at a temperature of 1050 DEG C.Will
Material is cooled to room temperature after reduction.
The present embodiment ilmenite after fluidization oxidationreduction can obtain TiO2Content is left in 50% or so, Fe about 30%
Right, S about 0.012%~0.014% or so reduced ilmenite, can be used as welding with raw material.
Embodiment 2
Panzhihua Ilmenite 200g of the granularity in -40~+160 mesh is weighed, ilmenite is added in fluidizing reactor.
Oxidizing roasting 30min at a temperature of 900 DEG C, it is passed through nitrogen and replacement Treatment is carried out to air.3h is reduced at a temperature of 1100 DEG C.Will
Material is cooled to room temperature after reduction.
The present embodiment ilmenite after fluidization oxidationreduction can obtain TiO2Content is left in 50% or so, Fe about 30%
Right, S about 0.012%~0.014% or so reduced ilmenite, can be used as welding with raw material.
Claims (6)
1. the preparation method of welding reduced ilmenite, it is characterised in that：Comprise the following steps：By ilmenite at 800~900 DEG C
Oxidation reaction is carried out, then 2~3h of reduction reaction is carried out at 1050~1150 DEG C again, is subsequently cooled to room temperature.
2. the preparation method of welding reduced ilmenite according to claim 1, it is characterised in that：The ilmenite is to climb
Branch spends regional ilmenite.
3. the preparation method of welding reduced ilmenite according to claim 1, it is characterised in that：The ilmenite granularity
For -40~+160 mesh.
4. the preparation method of welding reduced ilmenite according to claim 1, it is characterised in that：During the oxidation reaction
Between be 20~30min.
5. the preparation method of the welding reduced ilmenite according to any one of Claims 1 to 4, it is characterised in that：It is used
Equipment is fluidizing reactor.
6. the preparation method of welding reduced ilmenite according to claim 5, it is characterised in that：The oxidation or reduction
When fluidization gas flow be 2~3m3/min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710972491.XA CN107760870A (en) | 2017-10-18 | 2017-10-18 | A kind of preparation method of welding reduced ilmenite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710972491.XA CN107760870A (en) | 2017-10-18 | 2017-10-18 | A kind of preparation method of welding reduced ilmenite |
Publications (1)
| Publication Number | Publication Date |
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| CN107760870A true CN107760870A (en) | 2018-03-06 |
Family
ID=61269659
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710972491.XA Pending CN107760870A (en) | 2017-10-18 | 2017-10-18 | A kind of preparation method of welding reduced ilmenite |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036228A (en) * | 1988-06-24 | 1989-10-11 | 冶金工业部攀枝花钢铁公司钢铁研究院 | Preparation method of reduced ilmenite powder and uses thereof |
| US5885324A (en) * | 1996-07-26 | 1999-03-23 | Tiomin Resources, Inc. | Method for the production of synthetic rutile |
| CN101126111A (en) * | 2007-09-24 | 2008-02-20 | 昆明理工大学 | Ilmenite reduction method for preparing solder rod |
| CN103031431A (en) * | 2011-09-30 | 2013-04-10 | 中国科学院过程工程研究所 | System for oxidizing roasting-reducing roasting of titaniferous iron concentrate and roasting process |
| CN105648207A (en) * | 2016-02-25 | 2016-06-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for reduced ilmenite powder |
| CN106591600A (en) * | 2017-01-05 | 2017-04-26 | 重庆大学 | Method for preparing high-titanium slag through low-temperature gas-based reduction titanium-containing iron mineral powder |
-
2017
- 2017-10-18 CN CN201710972491.XA patent/CN107760870A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036228A (en) * | 1988-06-24 | 1989-10-11 | 冶金工业部攀枝花钢铁公司钢铁研究院 | Preparation method of reduced ilmenite powder and uses thereof |
| US5885324A (en) * | 1996-07-26 | 1999-03-23 | Tiomin Resources, Inc. | Method for the production of synthetic rutile |
| CN101126111A (en) * | 2007-09-24 | 2008-02-20 | 昆明理工大学 | Ilmenite reduction method for preparing solder rod |
| CN103031431A (en) * | 2011-09-30 | 2013-04-10 | 中国科学院过程工程研究所 | System for oxidizing roasting-reducing roasting of titaniferous iron concentrate and roasting process |
| CN105648207A (en) * | 2016-02-25 | 2016-06-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for reduced ilmenite powder |
| CN106591600A (en) * | 2017-01-05 | 2017-04-26 | 重庆大学 | Method for preparing high-titanium slag through low-temperature gas-based reduction titanium-containing iron mineral powder |
Non-Patent Citations (1)
| Title |
|---|
| 何安西等: "攀枝花钛精矿制取电焊条用还原钛铁矿粉的研究", 《钢铁钒钛》 * |
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Application publication date: 20180306 |
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