CN107488783A - A kind of preprocess method of ilmenite concentrate - Google Patents

A kind of preprocess method of ilmenite concentrate Download PDF

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Publication number
CN107488783A
CN107488783A CN201710780199.8A CN201710780199A CN107488783A CN 107488783 A CN107488783 A CN 107488783A CN 201710780199 A CN201710780199 A CN 201710780199A CN 107488783 A CN107488783 A CN 107488783A
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ilmenite concentrate
preprocess method
titanium slag
concentrate according
mesh
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CN201710780199.8A
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CN107488783B (en
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李凯茂
韩可喜
肖军
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Pangang Group Research Institute Co Ltd
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Pangang Group Research Institute Co Ltd
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    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • 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
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C22B34/1204—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
    • C22B34/1209—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by dry processes, e.g. with selective chlorination of iron or with formation of a titanium bearing slag

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention belongs to titanium slag technical field of smelting, relates generally to a kind of preprocess method of ilmenite concentrate.The technical problems to be solved by the invention are to remove the S in ilmenite concentrate, ilmenite concentrate is functioned well as the raw material of smelting titanium slag.The present invention solves the technical scheme of above-mentioned technical problem, comprises the following steps：It is classified after the oxidized roasting of ilmenite concentrate, the material of the mesh of granularity+200 is directly collected for use as smelting titanium slag raw material；The material of the mesh of granularity 200 carries out pelletizing, and gained green-ball is used as smelting titanium slag raw material after drying.The inventive method can remove the S in ilmenite concentrate, and gained ilmenite concentrate, which is used for smelting titanium slag, has the advantages of to environmental benefits.

Description

A kind of preprocess method of ilmenite concentrate
Technical field
The invention belongs to titanium slag technical field of smelting, relates generally to a kind of preprocess method of ilmenite concentrate.Relate generally to pair The higher ilmenite concentrate containing S is pre-processed.
Background technology
In recent years, as country constantly payes attention to environmental protection, a kind of cleaning, the technique of environmental protection is selected, is following enterprise Develop inexorable trend.Ilmenite concentrate is mainly used in sulfate process titanium dioxide and titanium slag is smelted.Because titanium slag smelting is remote to ilmenite concentrate demand Much smaller than sulfate process titanium dioxide demand, therefore high-quality ilmenite concentrate is preferentially sold to titanium white enterprise, and this certainly will influence titanium slag smelting pair Ilmenite concentrate is supplied.Therefore, titanium slag smelting enterprise would generally select some ilmenite concentrates inferior to carry out smelting titanium slags, for example, S contents compared with High ilmenite concentrate.
Following problem can be brought because the higher ilmenite concentrate of S contents directly enters stove smelting titanium slag, 1. SO in flue gas2Content Exceeded, 2. slag sluicing system is bad, 3. duration of heat length, 4. sistent foam slag time length, and 5. tapping temperature is high, 6. the byproduct pig iron The middle higher sales difficulty of S contents, this series of problems have a strong impact on that enterprise normally produces.
The content of the invention
The invention provides a kind of preprocess method of ilmenite concentrate.This method can remove S most in ilmenite concentrate, Influences of the S to process flow, has the advantages that to environmental benefits during so as to reduce subsequent smelting titanium slag.
The invention provides a kind of preprocess method of ilmenite concentrate.This method comprises the following steps：The oxidized roasting of ilmenite concentrate It is classified after burning, the material of the mesh of granularity+200 is directly collected for use as smelting titanium slag raw material；The material of the mesh of granularity -200 carries out pelletizing, institute Obtain after green-ball is dried and be used as smelting titanium slag raw material.
Preferably, in the preprocess method of above-mentioned ilmenite concentrate, the ilmenite concentrate comes from iron tailings of low-grade vanadium titano.It is described Ilmenite concentrate main component is：TiO244.5~46.5%, S 0.3~1.2%.
Preferably, in the preprocess method of above-mentioned ilmenite concentrate, the oxidizing roasting temperature is 950~1050 DEG C, and the time is 0.5~1h.
Wherein, in the preprocess method of above-mentioned ilmenite concentrate, the pelletizing uses disk pelletizing.
Wherein, in the preprocess method of above-mentioned ilmenite concentrate, the binding agent that the pelletizing uses is methylcellulose.
Further, in the preprocess method of above-mentioned ilmenite concentrate, the weight ratio of the material and methylcellulose is 100 ﹕ 0.6~1.
Specifically, in the preprocess method of above-mentioned ilmenite concentrate, the green-ball meets 0.5/ meter of drop strength >=3 time, single Compression strength >=4N.
Preferably, in the preprocess method of above-mentioned ilmenite concentrate, the green-ball drying to pulverization rate≤3%.The pulverization rate Refer to the total yield of -200 mesh.
Preferably, in the preprocess method of above-mentioned ilmenite concentrate, the temperature of the drying is 200~300 DEG C, the time 40~ 60min。
The inventive method can contain titanium dioxide to carrying out desulfurization containing ilmenite concentrate higher S caused by during oxidizing roasting The waste gas of the compositions such as sulphur, sulfurous organic compound, it can be handled through the mode burnt and alkali cleaning combines so as to be stripped of sulphur；Then oxygen Change the larger material of roasting granularity and continue directly to smelting titanium slag raw material, granularity is less to be carried out in order to avoid the pollution of dust to it Smelting titanium slag raw material is re-used as after pelletizing.By original of the pretreated ilmenite concentrate of the inventive method as subsequent smelting titanium slag Material, eliminates influences of the S to smelting, so as to equipment, it is environment-friendly the advantages of, and smelt the titanium slag quality that is prepared It is excellent, the raw materials such as follow-up titanium dioxide can be functioned well as.
Embodiment
A kind of method of ilmenite concentrate pretreatment, this method are divided into the step such as oxidizing roasting, sieve classification, disk pelletizing, drying Suddenly：
1) oxidizing roasting
Ilmenite concentrate is handled using oxidizing roasting mode and removes contained S, oxidizing process produces to be had containing sulfur dioxide, sulfur-bearing The waste gas of the compositions such as machine thing, organic volatile, the waste gas can use burning and alkali cleaning fit system to be handled；
Preferably, 950~1050 DEG C of the temperature of oxidizing roasting, oxidization time are 0.5~1h.
2) sieve classification process
Due to there is partial material granularity thinner after oxidizing roasting, it is directly used as smelting titanium slag raw material and dust pollution, difficulty is present The problems such as operation, so need to be sieved to oxidizing roasting resulting material, the mesh of granularity+200 material is straight as smelting titanium slag raw material Tap into electric furnace smelting；Granularity is further used as smelting titanium slag raw material after -200 mesh material disk pelletizings；
3) disk pelletizing process
- 200 mesh materials are subjected to disk pelletizing, material and binding agent methylcellulose weight ratio are 100 ﹕ 0.6~1；First Base cellulose is that binding agent can play a part of skeleton, bonding, and pulverization rate is low, does not influence the follow-up composition of product；
4) baking operation
Disk pelletizing obtains to green-ball is drying to pulverization rate≤3% through three-layer network, and the pulverization rate refers to that -200 mesh are total Yield, drying gained ball be used as raw materials for metallurgy.
Preferably, drying temperature is 200~300 DEG C, 40~60min of time.
In the inventive method, after the oxidized roasting of ilmenite concentrate, S contents in ilmenite concentrate are on the one hand reduced, as smelting titanium slag During raw material, SO in flue gas is greatly reduced2Content is discharged, and S contents reduce in the pig iron, is advantageous to slag sluicing system, tapping temperature drop Low, byproduct is easily sold；Another aspect ilmenite concentrate structure changes, and reaction speed is accelerated, and during as smelting titanium slag raw material, has Beneficial to shortening the heat.So the ilmenite concentrate after oxidized roasting can function well as raw materials for metallurgy.
In the inventive method, after the oxidized roasting of ilmenite concentrate, part ore deposit has efflorescence to a certain degree, if directly smelted Titanium slag, certainly will cause dust pollution, equally also reduce titanium yield.So the inventive method is entered to the material after oxidizing roasting Row sieve classification, the oversize (i.e.+200 mesh) of 200 eye mesh screens can be smelted directly as raw materials for metallurgy；200 eye mesh screens Screenings (i.e. -200 mesh) is because granularity is thinner, and being directly used as raw materials for metallurgy can cause dust pollution and titanium to lose, so first making Ball is further used as raw materials for metallurgy.
Embodiment 1
Ilmenite concentrate (wherein S >=0.3%) oxidized roasting, wherein sintering temperature are 950 DEG C, roasting time 1h, are obtained S content≤0.18% in ilmenite concentrate after oxidation；The essence of the titanium after the oxidation of the mesh of granularity+200, -200 mesh is obtained after screened classification Ore deposit, after the ilmenite concentrate after -200 mesh are aoxidized is mixed by ore deposit and methylcellulose weight ratio for 100 ﹕ 0.6, on disc balling machine Pelletizing, green-ball being obtained, its green ball strength index is drop strength (0.5/ meter) average out to 3 times, compression strength average out to 6N/, Green-ball carries out three-layer network band and is calcined 60min in 200 DEG C of drying, and gained ball pulverization rate is 3%.
Smelting titanium slag is carried out using the pretreated ilmenite concentrate of the present embodiment, SO in flue gas2≤200mg/NM3, meet environmental protection Discharge standard.
Embodiment 2
Ilmenite concentrate (wherein S >=0.3%) oxidized roasting, wherein sintering temperature are 1050 DEG C, roasting time 0.5h, are obtained S content≤0.1% in ilmenite concentrate after to oxidation；The essence of the titanium after the oxidation of the mesh of granularity+200, -200 mesh is obtained after screened classification Ore deposit, after the ilmenite concentrate after -200 mesh are aoxidized is mixed by ore deposit and methylcellulose weight ratio for 100 ﹕ 0.6, on disc balling machine Pelletizing, green-ball being obtained, its green ball strength index is drop strength (0.5/ meter) average out to 3 times, compression strength average out to 6N/, Green-ball carries out three-layer network band and is calcined 60min in 200 DEG C of drying, and gained ball pulverization rate is 3%.
Smelting titanium slag is carried out using the pretreated ilmenite concentrate of the present embodiment, SO in flue gas2≤200mg/NM3, meet environmental protection Discharge standard.
Embodiment 3
Ilmenite concentrate (wherein S >=0.3%) oxidized roasting, wherein sintering temperature are 1050 DEG C, roasting time 0.5h, are obtained S content≤0.1% in ilmenite concentrate after to oxidation；The essence of the titanium after the oxidation of the mesh of granularity+200, -200 mesh is obtained after screened classification Ore deposit, after the ilmenite concentrate after -200 mesh are aoxidized is mixed by ore deposit and methylcellulose weight ratio for 100 ﹕ 0.6, on disc balling machine Pelletizing, green-ball being obtained, its green ball strength index is drop strength (0.5/ meter) average out to 6 times, compression strength average out to 10N/, Green-ball carries out three-layer network band and is calcined 40min in 300 DEG C of drying, and gained ball pulverization rate is 2%.
Smelting titanium slag is carried out using the pretreated ilmenite concentrate of the present embodiment, SO in flue gas2≤200mg/NM3, meet environmental protection Discharge standard.
Embodiment 4
Ilmenite concentrate (wherein S >=0.3%) oxidized roasting, wherein sintering temperature are 1050 DEG C, roasting time 0.5h, are obtained S content≤0.1% in ilmenite concentrate after to oxidation；The essence of the titanium after the oxidation of the mesh of granularity+200, -200 mesh is obtained after screened classification Ore deposit, after the ilmenite concentrate after -200 mesh are aoxidized is mixed by ore deposit and methylcellulose weight ratio for 100 ﹕ 0.6, on disc balling machine Pelletizing, green-ball being obtained, its green ball strength index is drop strength (0.5/ meter) average out to 6 times, compression strength average out to 10N/, Green-ball carries out three-layer network band and is calcined 60min in 250 DEG C of drying, and gained ball pulverization rate is 1%.
Smelting titanium slag is carried out using the pretreated ilmenite concentrate of the present embodiment, SO in flue gas2≤200mg/NM3, meet environmental protection Discharge standard.

Claims (10)

1. the preprocess method of ilmenite concentrate, it is characterised in that：Comprise the following steps：It is classified after the oxidized roasting of ilmenite concentrate, granularity+ The material of 200 mesh is directly collected for use as smelting titanium slag raw material；The material of the mesh of granularity -200 carries out pelletizing, and gained green-ball is used after drying Make smelting titanium slag raw material.
2. the preprocess method of ilmenite concentrate according to claim 1, it is characterised in that：The ilmenite concentrate comes from v-ti magnetite Ore deposit iron selection tailings.
3. the preprocess method of ilmenite concentrate according to claim 1 or 2, it is characterised in that：The ilmenite concentrate main component For：TiO244.5~46.5%, S 0.3~1.2%.
4. the preprocess method of the ilmenite concentrate according to any one of claims 1 to 3, it is characterised in that：The oxidizing roasting Temperature is 950~1050 DEG C, and the time is 0.5~1h.
5. the preprocess method of the ilmenite concentrate according to any one of claims 1 to 3, it is characterised in that：The pelletizing uses Disk pelletizing.
6. the preprocess method of the ilmenite concentrate according to any one of claims 1 to 3, it is characterised in that：The pelletizing uses Binding agent be methylcellulose.
7. the preprocess method of ilmenite concentrate according to claim 6, it is characterised in that：The material and methylcellulose Weight ratio is 100 ﹕ 0.6~1.
8. the preprocess method of the ilmenite concentrate according to any one of claims 1 to 3, it is characterised in that：The green-ball meets 0.5/ meter of drop strength >=3 time, single compression strength >=4N.
9. the preprocess method of the ilmenite concentrate according to any one of claims 1 to 3, it is characterised in that：The green-ball is dried To pulverization rate≤3%.
10. the preprocess method of the ilmenite concentrate according to any one of claims 1 to 3, it is characterised in that：The temperature of the drying Spend for 200~300 DEG C, 40~60min of time.
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WO2014136901A1 (en) * 2013-03-06 2014-09-12 東邦チタニウム株式会社 Method for improving quality of titanium-containing feedstock
JP2014234547A (en) * 2013-06-05 2014-12-15 東邦チタニウム株式会社 Raw material for titanium refining and method of producing the same
CN105177281A (en) * 2015-11-05 2015-12-23 攀钢集团攀枝花钢铁研究院有限公司 Method for preparing titanium raw material
CN107083466A (en) * 2017-04-21 2017-08-22 攀钢集团攀枝花钢铁研究院有限公司 A kind of Application way of sefstromite

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WO2014136901A1 (en) * 2013-03-06 2014-09-12 東邦チタニウム株式会社 Method for improving quality of titanium-containing feedstock
JP2014234547A (en) * 2013-06-05 2014-12-15 東邦チタニウム株式会社 Raw material for titanium refining and method of producing the same
CN103834802A (en) * 2014-03-27 2014-06-04 攀枝花一立矿业股份有限公司 Titanium pellet for smelting high titanium slag and preparation method thereof
CN105177281A (en) * 2015-11-05 2015-12-23 攀钢集团攀枝花钢铁研究院有限公司 Method for preparing titanium raw material
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