CN102505061A - Method for preparing titanium-rich materials and granular irons by directly reducing titanic iron ore - Google Patents

Method for preparing titanium-rich materials and granular irons by directly reducing titanic iron ore Download PDF

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Publication number
CN102505061A
CN102505061A CN2012100002845A CN201210000284A CN102505061A CN 102505061 A CN102505061 A CN 102505061A CN 2012100002845 A CN2012100002845 A CN 2012100002845A CN 201210000284 A CN201210000284 A CN 201210000284A CN 102505061 A CN102505061 A CN 102505061A
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China
Prior art keywords
iron
titanium
ilmenite
reduction
granulated iron
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CN2012100002845A
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Chinese (zh)
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汪翔宇
王建春
汪寿平
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Tangshan Outstanding Science and Technology Co Ltd
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Tangshan Outstanding Science and Technology Co Ltd
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Priority to CN2012100002845A priority Critical patent/CN102505061A/en
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Abstract

The invention relates to a method for preparing titanium-rich materials and granular irons by directly reducing a titanic iron ore, and belongs to the technical field of metal metallurgy. The method employs a technical scheme as follows: sufficiently mixing the titanic iron ore with a reducing agent and an additive; sending mixed carbon-containing materials into reducing equipment for heating and reducing; discharging reduction product out of a furnace and then carrying out water quenching immediately; water quenching and cooling, and screening granular irons out, and then carrying out ore grinding magnetic separation to the materials, separating iron-containing powders out; making sponge iron briquettes by using the screened granular irons and the iron-containing powders obtained by magnetic separation, and using the sponge iron briquettes as excellent raw materials for steel making; and providing the titanium-rich materials obtained by magnetic separation as excellent raw materials for production of titanium tetrachloride, titanium white and sponge titanium. The method disclosed by the invention maximally increases grade of the titanium-rich materials and recovery rate of TiO2 (being at least 95%); in addition, the granular irons can be used as steel making raw materials, so that remarkable comprehensive utilization effect of resources is realized.

Description

The method of rich titanium material and granulated iron is produced in the direct reduction of ilmenite
Technical field
The present invention relates to the direct reduction of a kind of ilmenite and produce the method for rich titanium material and granulated iron, belong to the metal metallurgy smelting technical field.
Background technology
Because titanium is used widely in growing field, cause human demand to increase fast to titanium metal.The North America, Europe especially the Asia is the rapidest to the demand growth of metal titanium.Industries such as aerospace, naval vessel are all classified it as important strategic material stock both at home and abroad now, and in several years of future, the titanium deposit will show a rising trend.China has abundant titanium mineral resource, and the reserves of having verified are 8.7 hundred million tons, accounts for 48% of world's titanium reserves, occupies first place in the world.The China's titanium resource mainly contains two types: ilmenite (rock ore deposit+placer) and rutile, wherein 98.9% is ilmenite.And the China's titanium iron ore mainly exists with the vanadium titano-magnetite form, and the titanium ore resource mainly is distributed in Sichuan Pan Xi and area, Chengde.The method overwhelming majority of the enrichment ilmenite that at present has been used for industrial application or has studied is to be main technique with reduction method like two sections reducing smelting processes, weak reduction pickling process, reduction bubble method, this technology exist pollute too big, how by product is difficult to handle, consume sulfuric acid shortcoming such as.Therefore, the solid-state direct reduction technique of research ilmenite is that ilmenite is produced the technology of rich titanium material and granulated iron and realized that the comprehensive utilization of resources of ilmenite has great importance for the reduction grinding method of changing background technology.
Summary of the invention
The purpose of this invention is to provide the direct reduction of a kind of ilmenite and produce the method for rich titanium material and granulated iron; Method through taking to add a certain amount of additive promotes slag phase partial melting; For growing up of iron crystal grain creates conditions; Material behind the formation granulated iron can improve the efficient of follow-up mill ore magnetic selection operation greatly, more importantly is grade and the recovery (TiO that has improved titanium products 2Can reach more than 95%), environmentally safe solves the problems referred to above that background technology exists.
The present invention seeks to realize through following technical scheme:
Ilmenite directly reduction is produced the method for rich titanium material and granulated iron, comprises following technological process: 1. ilmenite and reductive agent, additive thorough mixing add thermal reduction in the mixed carbonaceous material entering reduction apparatus; 2. in reduction reaction; Additive can make non-ferrous oxide melt phase lump together; The formation granulated iron and metallic iron also flocks together when being reduced fast carries out shrend immediately after the product after the reduction is come out of the stove, can prevent that the resultant metal material is oxidized; 3. the shrend cooling filters out granulated iron; 4. after the shrend cooling filters out granulated iron, again material is carried out mill ore magnetic selection, select the iron content powder; 5. granulated iron that filters out and the iron content powder that magneticly elects are processed sponge iron briquetting, as the high quality raw material of steel-making; 6. the rich titanium material after the magnetic separation can be production titanium tetrachloride, white titanium pigment and Titanium Sponge 40-60 mesh product high quality raw material is provided.
Said additive is made up of more than one following substances, and said material is: quicklime, Natural manganese dioxide, silicon-dioxide, aluminium sesquioxide and borax; According to heterogeneity ratio in the ilmenite; Select to add any or multiple material; No matter be to add wherein one or more materials, the part by weight of interpolation is following: ilmenite 1: quicklime 0.0016~0.02, Natural manganese dioxide 0.0012~0.021, silicon-dioxide 0.0012~0.021, aluminium sesquioxide 0.009~0.015, borax 0.0016~0.009.For example: add a kind of material quicklime, the weight ratio of ilmenite and quicklime is 1:0.0016~0.02; Add three kinds of materials, quicklime, Natural manganese dioxide, silicon-dioxide, the weight ratio of ilmenite and quicklime, Natural manganese dioxide, silicon-dioxide is respectively 1:0.0016~0.02,0.0012~0.021,0.0012~0.021, adds simultaneously.
The interpolation one of additive be for the basicity scope of controlling reduced material between 0.2--0.8, promote iron to form granulated iron fast and separate with titanium slag; The 2nd, for material in reduction process, shorten the recovery time.
The thermal reduction reaction parameter that adds in the reduction apparatus is confirmed according to distinct device: the recovery time was controlled between 2--10 hour, and heating and temperature control is between 1000--1400 ℃.
The reductive agent additional proportion, the part by weight of ilmenite and reductive agent is: ilmenite ores 1: reductive agent 0.1--0.3.
Said reductive agent is carbon C; Reduction apparatus comprises: car bottom furnace, rotary kiln, rotary hearth furnace, tunnel, roller kiln, drawer kiln, shaft furnace, multiple bedded furnace etc.
TiO in the raw ore 2In 100%, adopt the inventive method, after the shrend cooling filters out granulated iron, again material is carried out mill ore magnetic selection, select the iron content powder, TiO in granulated iron and the iron content powder 2Content smaller or equal to 5% (weight ratio, the TiO in the raw ore 2In 100%); TiO in the rich titanium material after the magnetic separation 2Content greater than 95% (weight ratio, the TiO in the raw ore 2In 100%), so the material after the magnetic separation is referred to as rich titanium material.
Positively effect of the present invention is: the additive of adding can destroy FeO-TiO 2Key can impel non-ferrous oxide melt phase to lump together the formation slag, and makes ferrous oxide rapid more gathering in being reduced into the process of metallic state leave slag and form the granulated iron particle.Material behind the formation particle can improve the efficient of follow-up mill ore magnetic selection operation greatly, has improved the grade and the TiO of rich titanium products on the one hand to greatest extent 2The recovery (TiO 2Can reach more than 95%), granulated iron can be used as steelmaking feed on the other hand, and the comprehensive utilization of resources effect is remarkable.
Embodiment
Below through embodiment the present invention is described further.
Embodiment one
Feed proportioning: ilmenite (TFe=35.64%, TiO 2=42.92%), the granularity after the reductive agent that bituminous coal is processed into (carbon C) fragmentation is 50 ~ 100 orders, and adding additive adjusting material basicity is 0.2 ~ 0.7; (ilmenite 1: reductive agent 0.1 ~ 0.3: quicklime 0.001 ~ 0.012: borax 0.0016~0.009) mix, material is layered on and gets into reduction apparatus (drawer kiln) on the chassis face, is warming up to 1200 ~ 1400 ℃ of insulations 2 ~ 5 hours in proportion with reductive agent (carbon C), quicklime and borax with ilmenite powder; After the shrend of product kiln discharge, between granulated iron particle diameter 1~5 ㎜, again material is carried out mill ore magnetic selection in the material; Select the iron content powder, iron content powder that obtains and granulated iron product are through chemical examination; TFe=88.59%, TiO 2=6.06%; The rich titanium material product that obtains is through chemical examination TFe=9.54%, TiO 2=58.3%, TiO 2The recovery can reach more than 96%.
Embodiment two
Feed proportioning: ilmenite (TFe=35.64%, TiO 2=42.92%), the granularity after the reductive agent that bituminous coal is processed into (carbon C) fragmentation is 50 ~ 100 orders, and adding additive adjusting material basicity is 0.3 ~ 0.5; (ilmenite 1: reductive agent 0.1 ~ 0.2: Natural manganese dioxide 0.002 ~ 0.012: borax 0.002~0.009) mix, material is layered on and gets into reduction apparatus (car bottom furnace) on the chassis face, is warming up to 1200 ~ 1400 ℃ of insulations 2 ~ 5 hours in proportion with reductive agent (carbon C), Natural manganese dioxide and borax with ilmenite powder; After the shrend of product kiln discharge, between granulated iron particle diameter 1~5 ㎜, again material is carried out mill ore magnetic selection in the material; Select the iron content powder, iron content powder that obtains and granulated iron product are through chemical examination; TFe=90.29%, TiO 2=5.06%; The rich titanium material product that obtains is through chemical examination TFe=5.54%, TiO 2=65.88%, TiO 2The recovery can reach more than 96%.

Claims (5)

  1. An ilmenite directly reduction produce the method for rich titanium material and granulated iron, it is characterized in that comprising following technological process: 1. ilmenite and reductive agent, additive thorough mixing add thermal reduction in the mixed carbonaceous material entering reduction apparatus; 2. in reduction reaction; Additive can make non-ferrous oxide melt phase lump together; The formation granulated iron and metallic iron also flocks together when being reduced fast carries out shrend immediately after the product after the reduction is come out of the stove, can prevent that the resultant metal material is oxidized; 3. the shrend cooling filters out granulated iron; 4. after the shrend cooling filters out granulated iron, again material is carried out mill ore magnetic selection, select the iron content powder; 5. granulated iron that filters out and the iron content powder that magneticly elects are processed sponge iron briquetting, as the high quality raw material of steel-making; 6. the rich titanium material after the magnetic separation can be production titanium tetrachloride, white titanium pigment and Titanium Sponge 40-60 mesh product high quality raw material is provided.
  2. 2. according to the direct method of producing rich titanium material and granulated iron of reducing of the said ilmenite of claim 1; It is characterized in that: said additive is made up of more than one following substances, and said material is: quicklime, Natural manganese dioxide, silicon-dioxide, aluminium sesquioxide and borax; According to heterogeneity ratio in the ilmenite; Select to add any or multiple material; No matter be to add wherein one or more materials, the part by weight of interpolation is following: ilmenite 1: quicklime 0.0016~0.02, Natural manganese dioxide 0.0012~0.021, silicon-dioxide 0.0012~0.021, aluminium sesquioxide 0.009~0.015, borax 0.0016~0.009.
  3. 3. the ilmenite of stating according to claim 2 directly reduction is produced the method for rich titanium material and granulated iron, it is characterized in that the interpolation of additive, be for the basicity scope of controlling reduced material between 0.2--0.8.
  4. According to claim 1 or 2 said ilmenites directly reduction produce the method for rich titanium material and granulated iron, it is characterized in that said reductive agent is carbon C; The part by weight that adds is: ilmenite ores 1: reductive agent 0.1--0.3.
  5. According to claim 1 or 2 said ilmenites directly reduction produce the method for rich titanium material and granulated iron, it is characterized in that said reduction apparatus comprises: car bottom furnace, rotary kiln, rotary hearth furnace, tunnel, roller kiln, drawer kiln, shaft furnace, multiple bedded furnace.
CN2012100002845A 2012-01-04 2012-01-04 Method for preparing titanium-rich materials and granular irons by directly reducing titanic iron ore Pending CN102505061A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103468962A (en) * 2013-08-21 2013-12-25 北京科技大学 Titanium beneficiation method from titaniferous blast furnace slag
CN103602825A (en) * 2013-11-19 2014-02-26 郴州市金贵银业股份有限公司 Fluxing agent in precious metal pyrometallurgy
CN103627834A (en) * 2012-08-26 2014-03-12 程瑞国 New technology for extracting iron and producing titanium slag by direct reduction of ilmenite
CN104651601A (en) * 2015-02-06 2015-05-27 天津市宏远钛铁有限公司 Process for producing reduced ilmenite for welding rod through microwave heating
CN106521139A (en) * 2017-01-05 2017-03-22 重庆大学 Method for preparing high titanium slag through low temperature reduction and separation of titanium-containing iron ore
CN106526081A (en) * 2016-11-04 2017-03-22 四川龙蟒钛业股份有限公司 Reduced iron powder activity detection method
CN107262731A (en) * 2017-06-14 2017-10-20 唐竹胜 A kind of method that stocking/component of machine product is forged in powdery iron ore DRI hot pressing
CN109055781A (en) * 2018-07-11 2018-12-21 朱鸿民 A method of titanium products are prepared using ferrotianium grandidierite as raw material
CN113846236A (en) * 2021-09-18 2021-12-28 中南大学 Method for removing vanadium, manganese and chromium impurities in acid-soluble titanium slag

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101029344A (en) * 2007-04-17 2007-09-05 唐山奥特斯窑炉有限公司 Fast sponge-iron reduction
CN102212635A (en) * 2011-05-20 2011-10-12 唐山奥特斯科技有限公司 Process for producing granulated iron by directly reducing low-grade complex difficultly-processed ore

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101029344A (en) * 2007-04-17 2007-09-05 唐山奥特斯窑炉有限公司 Fast sponge-iron reduction
CN102212635A (en) * 2011-05-20 2011-10-12 唐山奥特斯科技有限公司 Process for producing granulated iron by directly reducing low-grade complex difficultly-processed ore

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103627834A (en) * 2012-08-26 2014-03-12 程瑞国 New technology for extracting iron and producing titanium slag by direct reduction of ilmenite
CN103468962A (en) * 2013-08-21 2013-12-25 北京科技大学 Titanium beneficiation method from titaniferous blast furnace slag
CN103602825A (en) * 2013-11-19 2014-02-26 郴州市金贵银业股份有限公司 Fluxing agent in precious metal pyrometallurgy
CN104651601A (en) * 2015-02-06 2015-05-27 天津市宏远钛铁有限公司 Process for producing reduced ilmenite for welding rod through microwave heating
CN106526081A (en) * 2016-11-04 2017-03-22 四川龙蟒钛业股份有限公司 Reduced iron powder activity detection method
CN106521139A (en) * 2017-01-05 2017-03-22 重庆大学 Method for preparing high titanium slag through low temperature reduction and separation of titanium-containing iron ore
CN107262731A (en) * 2017-06-14 2017-10-20 唐竹胜 A kind of method that stocking/component of machine product is forged in powdery iron ore DRI hot pressing
CN107262731B (en) * 2017-06-14 2019-06-21 唐竹胜 Stocking/component of machine product method is forged in a kind of powdery iron ore direct reduced iron hot pressing
CN109055781A (en) * 2018-07-11 2018-12-21 朱鸿民 A method of titanium products are prepared using ferrotianium grandidierite as raw material
CN109055781B (en) * 2018-07-11 2021-06-22 朱鸿民 Method for preparing titanium product by taking ferrotitanium composite ore as raw material
CN113846236A (en) * 2021-09-18 2021-12-28 中南大学 Method for removing vanadium, manganese and chromium impurities in acid-soluble titanium slag

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Application publication date: 20120620