CN105164284A - Process and plant for producing titanium slag from ilmenite - Google Patents
Process and plant for producing titanium slag from ilmenite Download PDFInfo
- Publication number
- CN105164284A CN105164284A CN201380074883.4A CN201380074883A CN105164284A CN 105164284 A CN105164284 A CN 105164284A CN 201380074883 A CN201380074883 A CN 201380074883A CN 105164284 A CN105164284 A CN 105164284A
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- China
- Prior art keywords
- ilmenite
- heat boiler
- waste heat
- electric furnace
- reduction reactor
- Prior art date
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- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000002893 slag Substances 0.000 title claims abstract description 39
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000010936 titanium Substances 0.000 title claims abstract description 38
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002918 waste heat Substances 0.000 claims abstract description 40
- 230000002829 reductive effect Effects 0.000 claims abstract description 25
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000002912 waste gas Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000006148 magnetic separator Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 239000004449 solid propellant Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 20
- 229910002091 carbon monoxide Inorganic materials 0.000 description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 16
- 239000003610 charcoal Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 239000003245 coal Substances 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 9
- 239000004408 titanium dioxide Substances 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000012717 electrostatic precipitator Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/08—Apparatus
-
- 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
-
- 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
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- 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
-
- 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
- C22B5/18—Reducing step-by-step
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A process for producing titanium slag from ilmenite comprises the steps of: a) Partial reduction of granular ilmenite with a reducing agent in a reduction reactor (6) at a temperature of at least 900 DEG C, b) Transfer of the partially reduced hot ilmenite obtained in step a) into an electric furnace (12), c) Smelting the ilmenite in the electric furnace (12) in the presence of a reducing agent to form liquid pig iron and titanium slag, and d) Withdrawing the titanium slag from the electric furnace (12). The off gas of the reduction reactor (6) is introduced into a waste heat boiler (20).
Description
Technical field
The present invention relates to a kind of for by ilmenite to produce the method for titanium slag, also relate to relevant device.
Background technology
The ilmenite comprising titanium dioxide and ferric oxide is the most important parent material of one for regaining metal titanium and titanium compound (such as the production of the titanium dioxide of pigment).Iron is separated (for reduced ilmenite) usually by carrying out electrofusion to perform to ilmenite in metallurgical furnace with coal, and iron oxide reduction becomes metallic iron, and this metallic iron precipitates from the slag comprising titanium dioxide.The main drawback of this method has very high requirement to electric energy, and this electric energy is the about 2200kWh of titanium slag per ton, is the major part of production cost.
Up to now, titanium slag equipment is just feasible economically in the country with lower electric cost, preferably can utilize in the country of water power, such as Canada or Norway, or in the country that the coal by low cost generates electricity, such as South Africa.The electric cost increased and the disadvantageous effect of economic conditions that the power supply restriction of the intensive factory of electricity will be caused slag manufacturer.Current, the electricity that the only about half of use that titanium slag is in the world produced is produced by coal, and second half uses water power.The stove of various design is used for operation, such as rectangle or round-shaped, prebake or self baking electrode, hollow or solid electrode, carry out supplying material by coreless armature or by furnace roof portion, AC or DC melts electric power etc.According to common smelting technology, most equipment is by operating cold fresh titanium iron ore supply smelting furnace.
Titanium slag produced by the ilmenite proposed based on prereduction, wherein, ilmenite and solid reductant (such as coal or charcoal) introduced in the rotary kiln being used as reduction reactor.The hot waste gas of rotary kiln is introduced in after-burner, comprises carbon monoxide in the offgas and hydrogen burns, and then, the waste gas with the temperature of 900 to 1000 DEG C sends waste heat boiler to, to produce steam.Due to the high temperature produced in after-burner, need injection water, pile up to avoid being formed on the wall of after-burner.The cost of equipment is quite high, and energy efficiency unsatisfactory.
The applicant propose in document WO2006/048283 a kind of for by ilmenite to produce the method for titanium slag, wherein, the first partial reduction by reductive agent in reduction reactor of granular ilmenite, then, the hot material with the inlet temperature of 500 to 900 DEG C is sent in electric furnace, and here melt when there being reductive agent, to form the liquid pig iron and titanium slag.Reduction reactor comprises circulating fluidized bed, and ore is being introduced in this circulating fluidized bed after multiple preheat stage and carbonization reactor.From fluid bed reduction reactor, the ilmenite of partial reduction and the mixture of the charcoal temperature at about 1000 DEG C is fetched, and before magnetic separator, be cooled to about 700 DEG C in its charging, in this magnetic separator, be rich in titanium dioxide and be separated with nonmagnetic portion as magnetic product with the part of metallic iron.Magnetic part charging is in type electric melting furnace, and this smelting furnace in about 1700 DEG C of operations, and produces titanium slag (having the titanium dioxide of 75 to 90wt%) and the liquid pig iron (having the metallic iron more than 94wt%).Waste gas from electric furnace comprises the carbon monoxide more than 90vol%, and burns in after-burner after dedusting.By heat smoke supply gas well heater, for heating the fluidizing agent will introducing reduction reactor.Although greatly reduced the energy expenditure in titanium slag is produced in system disclosed in document WO2006/048283, also has the possibility improved further.
Summary of the invention
Therefore, the object of the invention is to be reduced in the energy expenditure in titanium slag production further.In addition, CO
2discharge will reduce.
According to the present invention, provide a kind of method comprising the feature of claim 1.In order to produce titanium slag by ilmenite, in reduction reactor, carry out partial reduction granular ilmenite by reductive agent in the temperature of at least 900 DEG C (particularly at 1000-1150 DEG C).The hot ilmenite of partial reduction sends electric furnace to again, and it melts when there being reductive agent in this electric furnace, to form the liquid pig iron and titanium slag, is fetched by titanium slag from electric furnace.In this application, term electric furnace, electric reducing furnace and smelting furnace are synonymously for introducing similar elements.According to the present invention, the waste gas of reduction reactor is introduced in waste heat boiler.Preferably, between waste heat boiler and reduction reactor, direct connection is had.
Contrary with the method for prior art, the waste gas of reduction reactor does not supply after-burner, in after-burner, comprises carbon monoxide in the offgas and hydrogen burns, then, the waste gas with the temperature of 900 to 1100 DEG C sends waste heat boiler to produce steam.On the contrary, the present invention proposes and abandon after-burner, and waste heat boiler is connected with reduction reactor.Therefore, equipment cost can reduce greatly.And water injection required in after-burner can omit, because do not need corresponding cooling performance.
In a preferred embodiment of the invention, reduction reactor is rotary kiln, and particularly, coal and/or charcoal are added to this rotary kiln as solid reductant.In an alternative embodiment, reduction reactor can comprise as the circulating fluidized bed described in WO2006/048283A1, and wherein, the gas comprising carbon or hydrogen is used as reductive agent.
In order to improve the energy efficiency of method even further, the waste gas of electric furnace is also introduced in waste heat boiler.
Preferably, the waste gas of electric furnace carried out cooling and/or cleaning before introducing waste heat boiler.
Particularly, when coal and/or charcoal are used as reductive agent, show and be beneficial to making the ilmenite of partial reduction carry out Magneto separate before in charges of material to electric furnace, so that the magnetic part making to comprise titanium dioxide and ferric oxide is separated with the nonmagnetic portion substantially comprising ash and remain charcoal (when as reductive agent).Only have the magnetic part obtained by Magneto separate will be sent in electric furnace.In this case, the temperature of the material of the partial reduction used in Magneto separate process preferably about 700 DEG C.According to the present invention, magnetic part is sent in electric smelter subsequently, and does not cool or heat.On the other hand, for the heating materials of supply electric furnace is reduced to the energy needed for working temperature in stove, and the oxidation again of material substantially do not have partial reduction before introducing in electric furnace after.
When being introduced into from the remaining solid fuel (charcoal) of reduction reactor and/or the carbon that comprises the waste powder be separated by Magneto separate in waste heat boiler and burn wherein, the energy efficiency of described method increases even further.Thus, the calorific value of these materials also can be used in described method.
The feature of claim 7 is comprised according to equipment of the present invention (this equipment is applicable to performing aforesaid method).Particularly, described equipment comprises: reduction reactor, for the granular ilmenite of partial reduction; Magnetic separator, is separated with nonmagnetic portion for being made the ilmenite reduced by Magneto separate; And electric furnace, for the melt titanium iron ore when there being reductive agent, to produce titanium slag and the pig iron.Waste heat boiler is connected with reduction reactor.
Preferably, waste heat boiler comprises radiant section and convection section, and wherein, radiant section is connected with reduction reactor.
In the especially preferred embodiments, additional burner is arranged in the sidewall of waste heat boiler, to make the resistates burning comprising solid carbon in introducing waste heat boiler.
Preferably, reduction reactor is rotary kiln.In an alternative embodiment, reduction reactor comprises circulating fluidized bed.
Water cooler can be arranged at the downstream of reduction reactor.Preferably, water cooler is rotary cooler, indirectly cooled at this rotary cooler place by the heat exchange with water, to make the solid material leaving reduction reactor at the temperature of about 1000 DEG C be cooled to the temperature of about 700 DEG C before charging to magnetic separator.
Steam is produced, as known in the art in waste heat boiler.Preferably, turbo-generator is arranged on the downstream of waste heat boiler, for generating.
Provide the return conduit for being sent to by the waste gas from electric furnace in waste heat boiler in the present invention, therefore the heat of this waste gas also can use in the process.
The present invention will be introduced in more detail below according to preferred embodiments and drawings.Described and/or shown whole features are by self or form theme of the present invention in any combination, and no matter they are included in claim in the background technology being also included in them.
Accompanying drawing explanation
Fig. 1 is the schema according to equipment of the present invention;
Fig. 2 compares according to the equipment of prior art and throughput, the CO of equipment comprising feature of the present invention
2the view of discharge and electric consumption; And
Fig. 3 illustrates the electric cost can saved every year when the present invention is included in existing titanium slag smelting furnace.
Embodiment
As shown in fig. 1, for producing in the method for titanium slag by ilmenite, the mixture of ilmenite and coal and/or charcoal is supplied to roller feeder 4 or equivalent feedway from hopper 1,2,3, and supply airtight double pendulum valve 5, and from being supplied to the inlet part of reduction reactor 6 (particularly rotary kiln) here.Rotary kiln is preferably inclination 1 to 3%, to help solid material to move through this reactor.Process air is introduced in rotary kiln by housing air fan 7.For temperature controlled additional coal and/or sulphur (removing for local manganese when needing) and air by spray gun 8 adverse current inject.In reduction reactor 6, by the temperature (particularly about 1100 DEG C) of 1000 to 1150 DEG C reductive agent (particularly by coal and charcoal) and ilmenite is partly reduced to degree of metallization and is approximately 70% (iron level according to it).
The ilmenite of partial reduction and the mixture (having the temperature of about 1100 DEG C) of remaining charcoal are retracted to rotary cooler 10 from reduction reactor 6 by skewed slot 9 continuously, in this rotary cooler 10, it is cooled to the temperature of about 700 DEG C indirectly by water.Similar with rotary kiln, rotary cooler 10 tilts a little, to help the motion of flow of material.At the exit end place of rotary cooler 10, larger ore agglomerate is such as removed by sieving, and carries out pulverizing and processing respectively, so that recovery Pd and iron.
Surplus material is loaded on magnetic separator 11 the temperature of about 700 DEG C, and in this magnetic separator 11, magneticsubstance (titanium dioxide and metallic iron) is separated with nonmagnetic portion by pyromagnetic separation.Nonmagnetic portion is particularly including ash and residue charcoal (reduction not used in reduction reactor 6).
Then, by magnetic part (ilmenite of reduction) charging in electric reducing furnace 12 (smelting furnace), this electric reducing furnace 12 in about 1700 DEG C of operations, to produce the titanium slag and the liquid pig iron that comprises more than 94wt% metallic iron with 75 to 90wt% titanium dioxide.
The waste gas of reduction reactor 6 is introduced into be had in the waste heat boiler 20 of radiant section 21 and convection section 22.Reduction reactor 6 is directly connected with the radiant section 21 of waste heat boiler.Additional solid fuel (the residue charcoal particularly reclaimed by magnetic separator 11) and air are also introduced in waste heat boiler 20, to promote burning.Waste gas from electric reducing furnace 12 comprises the carbon monoxide of (usually more than 90vol%) in a large number, and is recycled to waste heat boiler 20 preferably through return conduit 23 after dedusting.
Additional burner 24 can be arranged in the sidewall of waste heat boiler 20, so that burning comprises the material of carbon.Emergency situation tabs 25 is driven under process upset state.The dust being deposited on the bottom place of waste heat boiler 20 is removed and is recycled to reduction reactor 6 by pipeline 26.Waste gas is taken out from waste heat boiler 20 by outlet 27, and cleans in electrostatic precipitator (ESP) 28 before it is discharged by chimney 29.Remaining dust can be recycled to reduction reactor 7 or return to mine as refuse.
The heat produced in waste heat boiler 20 is used for the high pressure steam produced in dry drum 30 at the pressure of 40 to 60 bar and the temperature of 350 to 600 DEG C (preferably 400 to 540 DEG C).By making steam heat this steam further through the convection section 22 of waste heat boiler 20, and be supplied to turbo-generator 31, to produce electric energy.The steam expanded carries out condensation in the condenser 32 be connected with cooling tower 33.Therefore the water produced carried out degassed before supply is for water storage tank 35 (this confession water storage tank 35 is in steam generation) in degasser 34.Additional former water can be added after going to remove mineral in mineral device.Then, water passes through the convection section 22 of waste heat boiler 20, to carry out preheating before it is introduced in dry drum 30.
By using the ilmenite of the reduction of preheating and the heat from reduction reactor 6 and electric reducing furnace 12, the energy expenditure of electric furnace 12 can reduce about 60% (compared with fusing of traditional original ilmenite).In addition, greatly can increase the throughput of electric furnace 12 and be improved the quality of products by the ash quantity reduced in introducing smelting furnace.
Example
Fig. 2 illustrates and uses prereduction ilmenite and use from the latent heat of multiple equipment configuration the CO to the equipment for generation of titanium slag
2the impact of discharge and energy expenditure.
In fig. 2, option A refers to standard method, and wherein, ilmenite is introduced in smelting furnace in zero metallized situation in room temperature (25 DEG C).In option B, degree of metallization is 70%, but still at the temperature supply ilmenite of 25 DEG C, and in option C, temperature is increased to 650 DEG C in addition.Option D represents the concept similar with option C, wherein, uses the heat from kiln waste gas in waste heat boiler.In option E, the other remaining charcoal fetched from rotary kiln burns in waste heat boiler, and in option F, the waste gas from electric furnace 20 also returns and utilize it in waste heat boiler.
For whole option A to F, the size of electric reducing furnace (smelting furnace) is all equal with the power of corresponding transformer.The maximum effect reduced energy is provided by option C (using the supplying temperature of 70% metallized reduced ilmenite and 650 DEG C) and D (using the latent heat from the waste gas of rotary kiln in addition for generating electricity).Option E comprises the burning of residue charcoal that kiln is discharged in addition, and option F also comprise cooling and clean, comprise carbon monoxide (CO) and hydrogen (H
2) the burning of electric furnace waste gas.By the sizable heat utilizing the temperature at about 1400-1500 DEG C to leave these waste gas of electric furnace in the waste heat boiler separated, can carry out energy-optimised further.
Traditional titanium slag that most basic option A corresponds to Most current common is produced.The ilmenite supplying the preheating of prereduction according to option C is reduced to about 58% of desirable value in option A by making at the power consumption at the electrode place of electric reducing furnace.Therefore, the throughput of electric reducing furnace can increase about 73%.Come for generating by the energy of the waste gas utilizing the waste gas of rotary kiln and residue charcoal and electric furnace in addition, the electric furnace total power consumption of titanium slag per ton can be reduced to about 39% of the value in option A further.This has considered for the electric energy in rotary kiln needed for prereduction and generating.The value determined from option A to F will by table 1.Calculating has the throughput (for cold supply, as in option A) of annual 250.000 tons based on electric smelter.Supply for preheating (650 DEG C) and have 70% metallized prereduction ilmenite, the throughput of the electric smelter of same size is increased to 432.000t/a.
Table 1: for the energy expenditure of the electric smelter of the production of titanium slag
In this example, option D titanium slag power reduction 1134kWh per ton.According to the price of 1,0USct/kWh, this causes titanium slag cost per ton to reduce by 11,34USD.According to the more real price of 5,0USct/kWh, it is per ton that this causes cost to reduce by 56,70USD, or about 24,500 ten thousand USD are annual.Fig. 3 illustrate based on different-energy price, possible annual saving situation in option C to F.
Another important advantage with the combination of the rotary kiln of electric smelter reduces CO
2discharge, this causes the CO only had in option F in option A
269% of discharge.This makes CO
2discharge about titanium slag per ton and reduce 1000kg.Option B provides CO
2the suitable reduction of discharge is (just due to the CO from reduction apparatus
2additional emissions).The CO of this minimizing that substantially compensate for the energy requirement by reducing electric smelter and obtain
2discharge.CO
2actual minimizing by by supply heating ilmenite and by use latent heat realize for generating.Table 2 illustrates the CO of the calculating for option A to F
2discharge.
Table 2: the CO when producing titanium slag
2discharge
For above-mentioned example, produce titanium slag per ton and produce about 0 simultaneously, the pig iron of 4 tons.Therefore people will consider the CO of the phase that the extra pig iron is produced
2discharge.Standard value is the about 1500kgCO of the pig iron per ton
2.This makes the CO of titanium slag per ton
2discharge reduces about 600kgCO further
2to about 1700kgCO
2.
List of reference characters
1 supply bin (ilmenite)
2 supply bins (coal)
3 supply bins (charcoal)
4 feeders
5 double pendulum valves
6 reduction reactors
7 housing air fans
8 spray guns
9 skewed slots
10 water coolers
11 magnetic separators
12 electric reducing furnaces (smelting furnace)
20 waste heat boilers
21 radiant sections
22 convection sections
23 return conduits
24 burners
25 emergency situation tabs
26 pipelines
27 outlets
28 electrostatic precipitator
29 chimneys
30 dry drums
31 turbo-generators
32 condensers
33 cooling towers
34 degassers
35 supply storage tanks
36 remove mineral device
Claims (14)
1., for being produced the method for titanium slag by ilmenite, comprise the following steps:
A) in reduction reactor (6), granular ilmenite partial reduction is made by reductive agent the temperature of at least 900 DEG C;
B) by step a) in the hot ilmenite of partial reduction that obtains send electric furnace (12) to;
C) in this electric furnace (12) when there being reductive agent melt titanium iron ore, to form the liquid pig iron and titanium slag; And
D) from electric furnace (12), described titanium slag is fetched;
It is characterized in that: the waste gas of reduction reactor (6) is introduced in waste heat boiler (20).
2. method according to claim 1, is characterized in that: reduction reactor is rotary kiln or the reactor comprising circulating fluidized bed.
3. method according to claim 1 and 2, is characterized in that: introduced in waste heat boiler (20) by the waste gas of electric furnace (12).
4. the method according to aforementioned any one claim, is characterized in that: the waste gas of electric furnace (12) carried out cooling and/or cleaning before being introduced into waste heat boiler (20).
5. the method according to aforementioned any one claim, it is characterized in that: before being sent in electric furnace (12), making the hot ilmenite of partial reduction carry out Magneto separate, and thus obtained magnetic part is loaded in electric furnace (12).
6. the method according to aforementioned any one claim, is characterized in that: be separated by Magneto separate, to be introduced into from the remaining solid fuel of reduction reactor (6) in waste heat boiler (20) and to burn wherein.
7., for being produced the equipment of titanium slag by ilmenite, especially for the method performed according to aforementioned any one claim, comprising:
Reduction reactor (6), carries out partial reduction for the temperature at least 900 DEG C to granular ilmenite;
Magnetic separator (11), is separated with nonmagnetic portion for being made the ilmenite reduced by Magneto separate; And
Electric furnace (12), for the melt titanium iron ore when there being reductive agent, to produce titanium slag and the pig iron;
It is characterized in that: waste heat boiler (20) is connected with reduction reactor (6).
8. equipment according to claim 7, it is characterized in that: waste heat boiler (20) comprises radiant section (21) and convection section (22), wherein, radiant section (21) is connected with reduction reactor (6).
9. the equipment according to claim 7 or 8, is characterized in that: additional burner (24) is arranged in the sidewall of waste heat boiler (20).
10. according to the equipment in claim 7 to 9 described in any one, it is characterized in that: reduction reactor (6) is rotary kiln.
11., according to the equipment in claim 7 to 9 described in any one, is characterized in that: reduction reactor (6) comprises circulating fluidized bed.
12., according to the equipment in claim 7 to 11 described in any one, is characterized in that: water cooler (10) is arranged in the downstream of reduction reactor (6).
13., according to the equipment in claim 7 to 12 described in any one, is characterized in that: dry drum (30) and turbo-generator (31) are arranged on the downstream of waste heat boiler, for generating.
14., according to the equipment in claim 7 to 13 described in any one, is characterized in that: return conduit (23) is for being sent to the waste gas from electric furnace (12) in waste heat boiler (20).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2013/055590 WO2014146682A1 (en) | 2013-03-18 | 2013-03-18 | Process and plant for producing titanium slag from ilmenite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105164284A true CN105164284A (en) | 2015-12-16 |
| CN105164284B CN105164284B (en) | 2017-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380074883.4A Expired - Fee Related CN105164284B (en) | 2013-03-18 | 2013-03-18 | Method and apparatus for producing titanium slag by ilmenite |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2976438B1 (en) |
| CN (1) | CN105164284B (en) |
| AP (1) | AP2015008744A0 (en) |
| AU (1) | AU2013383015B2 (en) |
| UA (1) | UA113351C2 (en) |
| WO (1) | WO2014146682A1 (en) |
| ZA (1) | ZA201507016B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017202119A1 (en) * | 2016-05-23 | 2017-11-30 | 中国恩菲工程技术有限公司 | Reduction smelting system and reduction smelting method for vanadium-titanium magnetite ore or ilmenite |
| CN108291714A (en) * | 2015-10-08 | 2018-07-17 | 因姆普朗伯德公司 | Method for running fluidized-bed combustion boiler |
| CN111733336A (en) * | 2020-08-28 | 2020-10-02 | 湖南碳谷装备制造有限公司 | Preparation process and system for producing high-grade titanium-rich material by utilizing ilmenite |
| WO2021036092A1 (en) * | 2019-08-30 | 2021-03-04 | 浙江海虹控股集团有限公司 | Energy-saving-type system and method for extracting titanium |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20155066A (en) * | 2015-01-30 | 2016-07-31 | Outotec Finland Oy | A process for the production of slag and crude iron containing titanium oxide from ilmenite and a plant |
| CN108411126B (en) * | 2018-05-01 | 2023-10-17 | 昆明有色冶金设计研究院股份公司 | Titanium slag smelting system and method based on pre-reduction |
| CN110000396A (en) * | 2019-04-09 | 2019-07-12 | 兰州有色冶金设计研究院有限公司 | A kind of reduction apparatus and method of fine iron breeze production reduced iron powder |
| CN114623689B (en) * | 2022-03-09 | 2023-11-03 | 江苏沙钢集团有限公司 | Environment-friendly energy-saving electric furnace and use method thereof |
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| AU765620B2 (en) * | 1998-11-23 | 2003-09-25 | Outotec Oyj | Process of reducing ilmenite |
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- 2013-03-18 AP AP2015008744A patent/AP2015008744A0/en unknown
- 2013-03-18 EP EP13713116.5A patent/EP2976438B1/en not_active Not-in-force
- 2013-03-18 AU AU2013383015A patent/AU2013383015B2/en not_active Ceased
- 2013-03-18 UA UAA201509166A patent/UA113351C2/en unknown
- 2013-03-18 CN CN201380074883.4A patent/CN105164284B/en not_active Expired - Fee Related
- 2013-03-18 WO PCT/EP2013/055590 patent/WO2014146682A1/en active Application Filing
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2015
- 2015-09-21 ZA ZA2015/07016A patent/ZA201507016B/en unknown
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| CN1478908A (en) * | 2002-08-29 | 2004-03-03 | 中国科学院过程工程研究所 | Method and device for separating iron and titanium to prepare high titanium slag |
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| CN108291714A (en) * | 2015-10-08 | 2018-07-17 | 因姆普朗伯德公司 | Method for running fluidized-bed combustion boiler |
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| WO2021036092A1 (en) * | 2019-08-30 | 2021-03-04 | 浙江海虹控股集团有限公司 | Energy-saving-type system and method for extracting titanium |
| CN111733336A (en) * | 2020-08-28 | 2020-10-02 | 湖南碳谷装备制造有限公司 | Preparation process and system for producing high-grade titanium-rich material by utilizing ilmenite |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA201507016B (en) | 2016-12-21 |
| AU2013383015A1 (en) | 2015-10-01 |
| EP2976438B1 (en) | 2017-01-18 |
| UA113351C2 (en) | 2017-01-10 |
| AP2015008744A0 (en) | 2015-09-30 |
| CN105164284B (en) | 2017-08-15 |
| AU2013383015B2 (en) | 2016-09-08 |
| EP2976438A1 (en) | 2016-01-27 |
| WO2014146682A1 (en) | 2014-09-25 |
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