CN104328275A - Preparation method of vanadium-titanium sinter - Google Patents
Preparation method of vanadium-titanium sinter Download PDFInfo
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- CN104328275A CN104328275A CN201410510484.4A CN201410510484A CN104328275A CN 104328275 A CN104328275 A CN 104328275A CN 201410510484 A CN201410510484 A CN 201410510484A CN 104328275 A CN104328275 A CN 104328275A
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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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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Abstract
The invention provides a preparation method of a vanadium-titanium sinter. The preparation method includes following steps: mixing vanadium titano-magnetite with common iron ore to obtain a first mixture, wherein the iron grade of the vanadium titano-magnetite is 50%-60%, the iron grade of the common iron ore is 50-60% and the common iron ore is free of vanadium and titanium; mixing the first mixture, a flux, a fuel and water to obtain a second mixture; performing pelletizing to obtain the second mixture to obtain agglomerated spheres; and successively performing material distribution, ignition and sintering to the agglomerated spheres to obtain the vanadium-titanium sinter, wherein a material layer thickness during the material distribution is 700-760 mm, volume concentration of oxygen during ignition is 1%-3% and the volume concentration of oxygen during sintering is 20%-25%. In the method, through an oxygen-rich technology, vertical combustion speed during the sintering process and ignition intensity during the sintering process is improved, and further temperature of sintering and ignition is increased and consumption of the fuel during the sintering process is reduced.
Description
Technical field
The present invention relates to smelting iron and steel technical field, particularly relate to a kind of preparation method of vanadium titanium agglomerate.
Background technology
The preparation method of agglomerate is generally: by various powdery iron-containing raw material, allocate appropriate fuel and flux into, and add appropriate water, after mixing and pelletizing, agglomerating plant makes material generation series of physical chemical transformation, mineral powder granular is cohered into block, obtains agglomerate.Agglomerate is the main raw material of current blast fumance, and its quality directly affects the economic target of blast fumance.
Application number be 200810305416.9 Chinese patent disclose a kind of preparation method of sintering ore of vanadium-titanium magnetite ore, comprise the following steps: A), take the vanadium titano-magnetite concentrate of 51 weight part ~ 57 weight parts, the breeze A of 15 weight part ~ 19 weight parts, the breeze B of 4 weight part ~ 6 weight parts, the breeze C of 6 weight part ~ 8 weight parts, compound made by the coke powder of 4.5 weight part ~ 6 weight parts; B), the Wingdale of 4 weight part ~ 6 weight parts, the unslaked lime of 1.5 weight part ~ 5.5 weight parts and 50% weight above-mentioned steps A is taken) compound that obtains mixes, pelletizing; C) unslaked lime and the 50% weight above-mentioned steps A of 1.5 weight part ~ 5.5 weight parts, is taken) compound that obtains mixes, by above-mentioned steps B) pelletizing that obtains of pelletizing rolls pelletizing wherein; D), by above-mentioned steps C) pelletizing that obtains of pelletizing sinters, and obtains sintering ore of vanadium-titanium magnetite ore.
The preparation method of this sintering ore of vanadium-titanium magnetite ore that prior art provides adds the common breeze of part in vanadium titano-magnetite, ignition intensity in this method sintering process preparing vanadium titanium agglomerate is lower, thus make igniting insufficient, cause the fuel consumption in sintering process more.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of preparation method of vanadium titanium agglomerate, method provided by the invention is to prepare the ignition intensity sintered in the process of vanadium titanium agglomerate higher.
The invention provides a kind of preparation method of vanadium titanium agglomerate, comprising:
By vanadium titano-magnetite and the mixing of common iron ore, obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%; Not containing vanadium and titanium in described common iron ore;
Described first mixture, flux, fuel and water are mixed, obtains the second mixture;
Described second mixture is carried out pelletizing, the group's of obtaining ball;
Described ball is carried out cloth, igniting and sintering successively, and obtain vanadium titanium agglomerate, bed thickness during described cloth is 700mm ~ 760mm, and carrier of oxygen volume concentrations during described igniting is 1% ~ 3%; Carrier of oxygen volume concentrations during described sintering is 20% ~ 25%.
Preferably, in described ignition process, the feed flow of oxygen is 100m
3/ hour ~ 400m
3/ hour.
Preferably, in described sintering process, the feed flow of oxygen is 1200m
3/ hour ~ 1800m
3/ hour.
Preferably, in described ignition process, the time of delivery of oxygen is 5 minutes ~ 10 minutes.
Preferably, in described sintering process, the transfer pressure of oxygen is 0.45MPa ~ 0.6MPa.
Preferably, the mass ratio of described vanadium titano-magnetite and common iron ore is (50 ~ 65): (10 ~ 20).
Preferably, the basicity of described second mixture is 2.2 ~ 2.6.
Preferably, described first mixture, flux and quality of fuel are than being (13 ~ 19): (2 ~ 5): 1.
Preferably, the diameter of described ball is 3mm ~ 8mm.
Preferably, the chassis machine speed in described sintering process is 1.5m/min ~ 2.3m/min.
The invention provides a kind of preparation method of vanadium titanium agglomerate, comprising: by vanadium titano-magnetite and the mixing of common iron ore, obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%; Not containing vanadium and titanium in described common iron ore; Described first mixture, flux, fuel and water are mixed, obtains the second mixture; Described second mixture is carried out pelletizing, the group's of obtaining ball; Described ball is carried out cloth, igniting and sintering successively, and obtain vanadium titanium agglomerate, bed thickness during described cloth is 700mm ~ 760mm, and carrier of oxygen volume concentrations during described igniting is 1% ~ 3%; Carrier of oxygen volume concentrations during described sintering is 20% ~ 25%.Method provided by the invention improves the speed of vertical combustion and the ignition intensity of sintering in sintering process by oxygen enriching process, and then improves the temperature of sintering ignition, reduces the consumption of fuel in sintering process.Experimental result shows, the speed that method provided by the invention prepares vertical combustion when sintering in the process of vanadium titanium agglomerate is 20mm/min ~ 21mm/min, the ignition temperature of sintering is 1160 DEG C ~ 1180 DEG C, the temperature of sintering is 485 DEG C ~ 495 DEG C, and the consumption of sintering fuel is 51.5kg/t (agglomerate) ~ 54.5kg/t (agglomerate).
Embodiment
Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of preparation method of vanadium titanium agglomerate, comprising:
By vanadium titano-magnetite and the mixing of common iron ore, obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%; Not containing vanadium and titanium in described common iron ore;
Described first mixture, flux, fuel and water are mixed, obtains the second mixture;
Described second mixture is carried out pelletizing, the group's of obtaining ball;
Described ball is carried out cloth, igniting and sintering successively, and obtain vanadium titanium agglomerate, bed thickness during described cloth is 700mm ~ 760mm, and carrier of oxygen volume concentrations during described igniting is 1% ~ 3%; Carrier of oxygen volume concentrations during described sintering is 20% ~ 25%.
Method provided by the invention improves the speed of vertical combustion in sintering process by oxygen enriching process, thus improves the ignition intensity of sintering and the temperature of sintering ignition, reduces the consumption of fuel in sintering process.
The present invention is by vanadium titano-magnetite and the mixing of common iron ore, and obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%.In the present invention, the Iron grade of described vanadium titano-magnetite is preferably 52% ~ 58%.In the present invention, the mass ratio of described vanadium titano-magnetite and common iron ore is preferably (50 ~ 65): (10 ~ 20), are more preferably (55 ~ 60): (12 ~ 18).
In the present invention, described vanadium titano-magnetite is preferably powdery vanadium titanomagnetite.In the present invention, the preferred < 5mm of granularity of described powdery vanadium titanomagnetite, is more preferably 1mm ~ 3mm.The source of the present invention to described vanadium titano-magnetite does not have special restriction, adopts vanadium titano-magnetite well known to those skilled in the art, can be bought obtain by market.
In the present invention, the Iron grade of described common iron ore is preferably 52% ~ 58%.In the present invention, vanadium and titanium is not contained in described common iron ore.In the present invention, described common iron ore is preferably Powdered common iron ore.In the present invention, the preferred < 5mm of granularity of described Powdered common iron ore, is more preferably 1mm ~ 3mm.The source of the present invention to described common iron ore does not have special restriction, adopts the iron ore of above-mentioned Iron grade well known to those skilled in the art, can be bought obtain by market.
The blending means of the present invention to described vanadium titano-magnetite and common iron ore does not have special restriction, adopts hybrid technology scheme well known to those skilled in the art, described vanadium titano-magnetite and common iron ore is mixed.
Vanadium titano-magnetite, common iron ore and iron-containing waste preferably mix by the present invention, and obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%; Not containing vanadium and titanium in described common iron ore; In described iron-containing waste, the mass content of iron is 40% ~ 50%, and the mass ratio of described vanadium titano-magnetite and iron-containing waste is (4 ~ 8): (3 ~ 7).The present invention utilizes iron-containing waste to prepare vanadium titanium agglomerate, can utilize the iron resources in iron-containing waste, reduces the production cost of vanadium titanium agglomerate.
In the present invention, the mass ratio of described vanadium titano-magnetite and iron-containing waste is preferably (5 ~ 7): (4 ~ 6), are more preferably 6:5.In the present invention, the preparation method of described iron-containing waste is preferably:
Dedusting ash, gravitational dust, steel-smelting sewage sludge and iron bearing slag making material are mixed, obtain iron-containing waste, the mass ratio of described dedusting ash, gravity meeting, steel-smelting sewage sludge and iron bearing slag making material is (130 ~ 230): (220 ~ 320): (220 ~ 320): (100 ~ 200).
Dedusting ash, gravitational dust, steel-smelting sewage sludge and iron bearing slag making material preferably mix by the present invention, obtain iron-containing waste.In the present invention, described dedusting ash preferably includes one or more in dedusting ash after stokehold dedusting ash, stove, steel-making dedusting ash and sintering machine tail ash, what more preferably comprise in dedusting ash after stokehold dedusting ash, stove, steel-making dedusting ash and sintering machine tail ash is several, most preferably comprises dedusting ash, steel-making dedusting ash and sintering machine tail ash after stokehold dedusting ash, stove.
In the present invention, in described dedusting ash, the mass content of iron is preferably 40% ~ 60%, is more preferably 45% ~ 55%, most preferably is 48% ~ 52%.In the present invention, in described dedusting ash, the mass content of calcium oxide is preferably 13% ~ 16%, is more preferably 14% ~ 15%.In the present invention, in described dedusting ash, the quality of sulphur trioxide is containing being preferably 5% ~ 9%, is more preferably 6% ~ 8%.
In the present invention, in the dedusting ash of described stokehold, the mass content of iron is preferably 50% ~ 60%, is more preferably 52% ~ 58%, most preferably is 54% ~ 56%.In the present invention, after described stove, in dedusting ash, the mass content of iron is preferably 38% ~ 42%, is more preferably 40%.In the present invention, in described sintering machine tail ash, the mass content of iron is preferably 42% ~ 48%, is more preferably 44% ~ 46%, most preferably is 45%.
In the present invention, the airborne dust of described dedusting ash is comparatively serious.Before described dedusting ash is mixed, preferably described dedusting ash is fetched water process.In the present invention, the granularity of described dedusting ash is preferably 0.5mm ~ 3mm, is more preferably 1mm ~ 2mm.The source of the present invention to described dedusting ash does not have special restriction, collects the dedusting ash in v-bearing titanomagnetite smelting process.
In the present invention, in described gravitational dust, the quality of iron is containing being preferably 15% ~ 25%, is more preferably 18% ~ 22%, most preferably is 20%.In the present invention, in described gravitational dust, the mass content of calcium oxide is preferably 3% ~ 5%, is more preferably 3.5% ~ 4.5%.In the present invention, in described gravitational dust, the quality of sulphur trioxide contains and elects 6% ~ 8% as, is more preferably 6.5% ~ 7.5%.In the present invention, the airborne dust of described gravitational dust is comparatively serious.Before described gravitational dust is mixed, preferably described gravitational dust is fetched water process.In the present invention, the granularity of described gravitational dust is preferably 0.5mm ~ 3mm, is more preferably 1mm ~ 2mm.The source of the present invention to described gravitational dust does not have special restriction, collects the gravitational dust in v-bearing titanomagnetite smelting process.
In the present invention, in described steel-smelting sewage sludge, the mass content of iron is preferably 45% ~ 55%, is more preferably 48% ~ 52%, most preferably is 50%.In the present invention, in described steel-smelting sewage sludge, the mass content of calcium oxide is preferably 9% ~ 12%, is more preferably 10% ~ 11%.In the present invention, in described steel-smelting sewage sludge, the mass content of sulphur trioxide is preferably 2% ~ 3%, is more preferably 2.2% ~ 2.8%.
Described steel-smelting sewage sludge is directly carried out the blocking that mixing can cause the pump housing and pipeline by the present invention.Before being mixed by described steel-smelting sewage sludge, described steel-smelting sewage sludge is preferably carried out processed by the present invention.The method of the present invention to described processed does not have special restriction, adopts the method for processed well known to those skilled in the art.In the present invention, described processed preferably makes the mass content of water in the steel-smelting sewage sludge after the dehydration obtained be 25% ~ 70%, is more preferably 30% ~ 50%.In the present invention, the method for described processed is preferably squeezing.The source of the present invention to described steel-smelting sewage sludge does not have special restriction, collects the steel-smelting sewage sludge in v-bearing titanomagnetite smelting process.
In the present invention, described iron bearing slag making material preferably includes one or more in hammer scale, slag and desulfurization slag, and what be more preferably in hammer scale, slag and desulfurization slag is several, most preferably is hammer scale, slag and desulfurization slag.In the present invention, in described iron bearing slag making material, the mass content of iron is preferably 20% ~ 70%, is more preferably 30% ~ 60%, most preferably is 40% ~ 50%.In the present invention, in described iron bearing slag making material, the mass content of calcium oxide is preferably 1% ~ 35%, is more preferably 1.5% ~ 30%, most preferably is 5% ~ 25%.In the present invention, in described iron bearing slag making material, the mass content of sulphur trioxide is preferably 2% ~ 12%, is more preferably 3% ~ 8%.
In the present invention, in described hammer scale, the mass content of iron is preferably 60% ~ 70%, is more preferably 62% ~ 68%, most preferably is 64% ~ 66%.In the present invention, in described hammer scale, the mass content of calcium oxide is preferably 1% ~ 2%, is more preferably 1.4% ~ 1.8%, most preferably is 1.5% ~ 1.6%.In the present invention, in described hammer scale, the mass content of sulphur trioxide is preferably 2% ~ 4%, is more preferably 2.5% ~ 3.5%.
In the present invention, in described slag, the mass content of iron is preferably 15% ~ 25%, is more preferably 18% ~ 22%, most preferably is 19% ~ 21%.In the present invention, in described slag, the mass content of calcium oxide is preferably 30% ~ 38%, is more preferably 32% ~ 36%, most preferably is 33% ~ 35%.In the present invention, in described slag, the mass content of sulphur trioxide is preferably 8% ~ 12%, is more preferably 9% ~ 11%.
In the present invention, in described desulfurization slag, the mass content of iron is preferably 45% ~ 55%, is more preferably 48% ~ 52%, most preferably is 49% ~ 51%.In the present invention, in described desulfurization slag, the mass content of calcium oxide is preferably 15% ~ 25%, is more preferably 18% ~ 22%, most preferably is 19% ~ 21%.In the present invention, in described desulfurization slag, the mass content of sulphur trioxide is preferably 6% ~ 10%, is more preferably 7% ~ 8%.
Before being mixed by described iron bearing slag making material, described iron bearing slag making material preferably carries out pulverizing and magnetic separation by the present invention.The order of the present invention to described pulverizing and magnetic separation does not have special restriction, and when described iron bearing slag making material is slag, described slag is preferably first pulverized magnetic separation again by the present invention; When described iron bearing slag making material is desulfurization slag, first for described desulfurization slag magnetic separation is preferably pulverized by the present invention again.
In the present invention, the grinding particle size of described iron bearing slag making material preferably≤10mm, more preferably≤3mm.In the present invention, in described iron bearing slag making material, the mass content of the slag charge of granularity≤10mm is preferably >=85%, more preferably >=90%.In the present invention, the granularity of described hammer scale is preferably≤10mm, is more preferably≤3mm.In the present invention, the granularity of described slag preferably≤3mm.In the present invention, in described slag, the mass content of the slag of granularity≤10mm is preferably >=85%.In the present invention, the granularity of described desulfurization slag preferably≤10mm.In the present invention, in described desulfurization slag, the mass content of the desulfurization slag of granularity≤10mm is preferably >=85%.
The source of the present invention to described iron bearing slag making material does not have special restriction, adopts the iron bearing slag making material of mentioned kind well known to those skilled in the art, collects the iron bearing slag making material in v-bearing titanomagnetite smelting process.
In the present invention, the mass ratio of described dedusting ash, gravity meeting, steel-smelting sewage sludge and iron bearing slag making material is (130 ~ 230): (220 ~ 320): (220 ~ 320): (100 ~ 200), be preferably (150 ~ 200): (250 ~ 300): (250 ~ 300): (130 ~ 180), are more preferably 180:270:270:150.
After obtaining the first mixture, described first mixture, flux, fuel and water mix by the present invention, obtain the second mixture, this fuel is designated as the first fuel.In the present invention, described first mixture, flux and the first quality of fuel are than being preferably (13 ~ 19): (2 ~ 5): 1, are more preferably (15 ~ 17): (3 ~ 4): 1.In the present invention, the basicity of described second mixture is preferably 2.2 ~ 2.6, is more preferably 2.3 ~ 2.5.The consumption of the present invention to described water does not have special restriction, adopts the add-on preparing water in agglomerate process well known to those skilled in the art.In the present invention, the consumption of described water makes described second mixture be easy to pelletizing.
In the present invention, described first mixture is preferably Powdered first mixture.In the present invention, the preferred < 5mm of granularity of described Powdered first mixture, is more preferably 1mm ~ 3mm.
In the present invention, described flux is preferably Powdered flux.In the present invention, the preferred < 5mm of granularity of described Powdered flux, is more preferably 1mm ~ 3mm.In the present invention, described flux is preferably unslaked lime and rhombspar.In the present invention, when described flux be unslaked lime and rhombspar time, the mass ratio of described unslaked lime and rhombspar is preferably (2 ~ 6): 1, is more preferably (3 ~ 5): 1.The source of the present invention to described flux does not have special restriction, adopts the flux of mentioned kind well known to those skilled in the art, can be bought obtain by market.
In the present invention, described first fuel is preferably powdered fuel.In the present invention, the preferred < 5mm of granularity of described powdered fuel, is more preferably 1mm ~ 3mm.In the present invention, described first fuel is preferably coke powder.The source of the present invention to described first fuel does not have special restriction, adopts the fuel of mentioned kind well known to those skilled in the art, can be bought obtain by market.
After obtaining the second mixture, described second mixture is carried out pelletizing by the present invention, the group's of obtaining ball.The method of the present invention to described pelletizing does not have special restriction, and those skilled in the art can carry out pelletizing in pelletizer.In the present invention, the diameter of described ball is preferably 3mm ~ 8mm, is more preferably 4mm ~ 6mm.
After the group's of obtaining ball, described ball is carried out cloth, igniting and sintering by the present invention successively, and obtain vanadium titanium agglomerate, bed thickness during described cloth is 700mm ~ 760mm, and carrier of oxygen volume concentrations during described igniting is 1% ~ 3%; Carrier of oxygen volume concentrations during described sintering is 20% ~ 25%.
In the present invention, the thickness of the described bed of material is preferably 710mm ~ 730mm, is more preferably 715mm ~ 725mm, most preferably is 720mm.In the present invention, the shape of the described bed of material is preferably trapezoidal.In the present invention, the ventilation property of the described bed of material preferably makes the negative pressure of sinter machine in-15KPa ~-16KPa scope, more preferably in-15.3KPa ~-15.6KPa scope.
In the present invention, carrier of oxygen volume concentrations during described igniting is preferably 1.5% ~ 2.5%, is more preferably 2%.In the present invention, the volumetric concentration of oxygen in combustion air when carrier of oxygen volume concentrations during described igniting refers to igniting.In the present invention, in described ignition process, the transfer pressure of oxygen is preferably 0.45MPa ~ 0.6MPa, is more preferably 0.5MPa ~ 0.55MPa.In the present invention, in described ignition process, the feed flow of oxygen is preferably 100m
3/ hour ~ 400m
3/ hour, be more preferably 200m
3/ hour ~ 300m
3/ hour.In the present invention, in described ignition process, the time of delivery of oxygen is preferably 5min ~ 10min, is more preferably 6min ~ 8min.
In the present invention, the temperature of described igniting is preferably 1160 DEG C ~ 1180 DEG C, is more preferably 1165 DEG C ~ 1175 DEG C, most preferably is 1170 DEG C.In the present invention, the time of described igniting is preferably 40 seconds ~ 60 seconds, is more preferably 45 seconds ~ 55 seconds.In the present invention, the vacuum tightness of described igniting is preferably-10Pa ~ 10Pa, is more preferably 0Pa ~ 5Pa.In the present invention, the degree of depth of described igniting is preferably 10mm ~ 20mm, is more preferably 12mm ~ 18mm.
After described igniting completes, the bed of material after igniting sinters by the present invention, obtains vanadium titanium agglomerate.In the present invention, carrier of oxygen volume concentrations during described sintering is preferably 20% ~ 25%, and more preferably 22% ~ 24%, most preferably be 23%.In the present invention, the volumetric concentration of oxygen in sintering air feed when carrier of oxygen volume concentrations during described sintering refers to sintering.In the present invention, the pressure of the oxygen delivery in described sintering process is preferably 0.45MPa ~ 0.6MPa, is more preferably 0.5MPa ~ 0.55MPa.In the present invention, the oxygen delivery flow in described sintering process is preferably 1200m
3/ hour ~ 1800m
3/ hour, be more preferably 1300m
3/ hour ~ 1700m
3/ hour, most preferably be 1500m
3/ hour.In the present invention, the oxygen delivery time in described sintering process is preferably 5 minutes ~ 10 minutes, is more preferably 6 minutes ~ 8 minutes, most preferably is 7 minutes.
The sintering fuel adopted in sintering process is designated as the second fuel by the present invention.In the present invention, described second fuel is preferably solid fuel, is more preferably coke powder.In the present invention, the chassis machine degree in described sintering process is preferably 1.5m/min ~ 2.3m/min, is more preferably 1.8m/min ~ 2.2m/min, most preferably is 1.9m/min ~ 2.1m/min.
Vanadium titanium agglomerate method provided by the invention prepared detects according to the standard of YB/T-006-91 " technical indicator of China's high-quality iron agglomerate ", detected result is, the basicity qualification rate of the vanadium titanium agglomerate that the present invention prepares is 92%, FeO content qualification rate is 95%, screening index is 13.5% ~ 14.5%, tumbler index is 75% ~ 76%, and low temperature reduction degradation index is 80.5% ~ 81.5%.Result shows, method provided by the invention can prepare up-to-standard vanadium titanium agglomerate.
In the present invention, the method for calculation of described vertical combustion speed are:
Bed thickness/(chassis length/chassis machine speed).
In the present invention, described ignition intensity adopts ignition temperature to characterize.In the present invention, described sintering temperature is the temperature of sintering end point.In the present invention, the sintering fuel of described sintering fuel consumption needed for production one ton of vanadium titanium agglomerate.
According to method described in technique scheme, test vertical combustion speed when method provided by the invention sinters in the process preparing vanadium titanium agglomerate, ignition intensity, sintering temperature and sintering fuel consumption.Detected result is, vertical combustion speed when method provided by the invention sinters in the process preparing vanadium titanium agglomerate is 20mm/min ~ 21mm/min, ignition temperature is 1160 DEG C ~ 1180 DEG C, sintering temperature is 485 DEG C ~ 495 DEG C, and the consumption of sintering fuel is 51.5kg/t (agglomerate) ~ 54.5kg/t (agglomerate).
The invention provides a kind of preparation method of vanadium titanium agglomerate, comprising: by vanadium titano-magnetite and the mixing of common iron ore, obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%; Not containing vanadium and titanium in described common iron ore; Described first mixture, flux, fuel and water are mixed, obtains the second mixture; Described second mixture is carried out pelletizing, the group's of obtaining ball; Described ball is carried out cloth, igniting and sintering successively, and obtain vanadium titanium agglomerate, bed thickness during described cloth is 700mm ~ 760mm, and carrier of oxygen volume concentrations during described igniting is 1% ~ 3%; Carrier of oxygen volume concentrations during described sintering is 20% ~ 25%.Method provided by the invention improves the speed of vertical combustion and the ignition intensity of sintering in sintering process by oxygen enriching process, and then improves the temperature of sintering ignition, reduces the consumption of fuel in sintering process.
Embodiment 1
To be the mass content of 3mm iron by 10Kg granularity be 70% hammer scale, 10Kg granularity to be the mass content of 3mm iron be 30% slag, 10Kg granularity be the mass content of 3mm iron be the desulfurization slag of 50%, the mass content of 5Kg iron to be the sintering machine tail ash of 34% and the mass content of 3Kg iron be 55% steel-smelting sewage sludge prepare burden at sintering plant feed bin weigher, to obtain granularity be 3mm Iron grade be 50% iron-containing waste.
Embodiment 2
To be the mass content of 3mm iron by 10Kg granularity be 70% hammer scale, 10Kg granularity to be the mass content of 3mm iron be 30% slag, 10Kg granularity be the mass content of 3mm iron be the desulfurization slag of 50%, the mass content of 5Kg iron to be the sintering machine tail ash of 34% and the mass content of 3Kg iron be 54% steel-smelting sewage sludge prepare burden, by the material layering windrow that stacker in layer will prepare, the height controlling windrow is 8 meters, make each vertical section material component substantially identical, to obtain granularity be 3mm Iron grade be 50% iron-containing waste.
Embodiment 3
To be the mass content of 3mm iron by 10Kg granularity be 70% hammer scale, 10Kg granularity to be the mass content of 3mm iron be 30% slag, 10Kg granularity be the mass content of 3mm be the desulfurization slag of 50%, the mass content of 5Kg iron to be the sintering machine tail ash of 28% and the mass content of 3Kg iron be 55% steel-smelting sewage sludge prepare burden, by the material layering windrow that stacker in layer will prepare, controlling feed height is 10 meters, make each vertical section material component substantially identical, to obtain granularity be 3mm Iron grade be 50% iron-containing waste.
Embodiment 4
Be the Iron grade of 0.07mm by the granularity of 55Kg be the vanadium titano-magnetite of 55%, the granularity of 35Kg be the Iron grade of 3mm is the iron-containing waste mixing that the common iron ore of 47% and the embodiment 1 of 15Kg prepare, obtain first mixture of granularity 5mm;
Be the calcium lime powder of 2mm by first mixture of 81Kg, the ground dolomite of the granularity 3mm of 3Kg, the granularity of 11Kg, the granularity of 5Kg is the coke powder of 1mm and the water mixing of 5Kg, obtain the second mixture that granularity is 6mm, basicity is 2.4;
By described second mixture pelletizing on pelletizer, obtain group's ball that granularity is 4mm;
Described ball is carried out cloth, and bed thickness during described cloth is 720mm, and the shape of the described bed of material is trapezoidal; The ventilation property of the described bed of material makes the negative pressure of sinter machine for-15KPa;
Lighted a fire by the described bed of material, during described igniting, the volumetric concentration of oxygen in combustion air is 2%, and in ignition process, the transfer pressure of oxygen is 0.45MPa, and in ignition process, the feed flow of oxygen is 300m
3/ h, in ignition process, the time of delivery of oxygen is 5min;
After described igniting completes, sintered by the group's ball after igniting, in described sintering process, the volumetric concentration of oxygen in combustion air is 23%, and the feed flow of the oxygen in sintering process is 1200m
3/ hour, in sintering process, the oxygen delivery time is 5 minutes, and in sintering process, the transfer pressure of oxygen is 0.45MPa; Chassis machine speed in sintering process is 2.05m/min.
According to the method described in technique scheme, test the basicity qualification rate of the vanadium titanium agglomerate method that the embodiment of the present invention 4 provides prepared, FeO content qualification rate, screening index, tumbler index and low temperature reduction degradation index.Detected result is, the basicity qualification rate of the vanadium titanium agglomerate that the method that the embodiment of the present invention 4 provides prepares is 92%, FeO content qualification rate is 95%, and screening index is 14.5, and tumbler index is 75.2, and low temperature reduction degradation index is 80.5, up-to-standard.
According to the method described in technique scheme, vertical combustion speed, ignition intensity, sintering temperature and sintering fuel consumption when the method that the test embodiment of the present invention 4 provides sinters in the process preparing vanadium titanium agglomerate.Detected result is, vertical combustion speed when the method that the embodiment of the present invention 4 provides sinters in the process preparing vanadium titanium agglomerate is 20.2mm/min, ignition temperature is 1160 DEG C, and sintering temperature is 485 DEG C, and sintering fuel consumption is 54.5kg/t (agglomerate).
Embodiment 5
Be the Iron grade of 0.06mm by the granularity of 55Kg be the vanadium titano-magnetite of 55%, the granularity of 35Kg be the Iron grade of 10mm is the iron-containing waste mixing that the common iron ore of 52% and the embodiment 2 of 15Kg prepare, obtain the first mixture that granularity is 8mm;
Be the ground dolomite of 2mm by first mixture of 81Kg, the granularity of 3Kg, the granularity of 11Kg is the calcium lime powder of 2mm, the granularity of 5Kg is the coke powder of 2mm and the water mixing of 5Kg, obtain the second mixture that granularity is 5mm, basicity is 2.4;
By described second mixture pelletizing on pelletizer, obtain group's ball that granularity is 6mm;
Described ball is carried out cloth, and bed thickness during described cloth is 720mm, and the shape of the described bed of material is trapezoidal; The ventilation property of the described bed of material makes the negative pressure of sinter machine for-15.2KPa;
Lighted a fire by the described bed of material, during described igniting, the volumetric concentration of oxygen in combustion air is 3%, and in ignition process, the transfer pressure of oxygen is 0.5MPa, and in ignition process, the feed flow of oxygen is 200m
3/ h, in ignition process, the time of delivery of oxygen is 6min;
After described igniting completes, sintered by the group's ball after igniting, in described sintering process, the volumetric concentration of oxygen in combustion air is 24%, and the feed flow of the oxygen in sintering process is 1800m
3/ hour, in sintering process, the oxygen delivery time is 6 minutes, and in sintering process, the transfer pressure of oxygen is 0.5MPa; Chassis machine speed in sintering process is 2.05m/min.
According to the method described in technique scheme, test the basicity qualification rate of the vanadium titanium agglomerate method that the embodiment of the present invention 5 provides prepared, FeO content qualification rate, screening index, tumbler index and low temperature reduction degradation index.Detected result is, the basicity qualification rate of the vanadium titanium agglomerate that the method that the embodiment of the present invention 2 provides prepares is 92%, FeO content qualification rate is 95%, and screening index is 14%, and tumbler index is 75.4%, and low temperature reduction degradation index is 81%, up-to-standard.
According to the method described in technique scheme, vertical combustion speed, ignition intensity, sintering temperature and sintering fuel consumption when the method that the test embodiment of the present invention 5 provides sinters in the process preparing vanadium titanium agglomerate.Detected result is, vertical combustion speed when the method that the embodiment of the present invention 5 provides sinters in the process preparing vanadium titanium agglomerate is 20.4mm/min, ignition temperature is 1170 DEG C, and sintering temperature is 490 DEG C, and sintering fuel consumption is 52kg/t (agglomerate).
Embodiment 6
Be the Iron grade of 0.05mm by the granularity of 55Kg be the vanadium titano-magnetite of 55%, the granularity of 35Kg to be the Iron grade of 5mm be 50% common iron ore and the iron-containing waste mixing for preparing of 15Kg embodiment 3, obtain the first mixture that granularity is 3mm;
Be the ground dolomite of 1mm by first mixture of 81Kg, the granularity of 3Kg, the granularity of 11Kg is the calcium lime powder of 1mm and the water mixing of 5Kg, obtain the second mixture that granularity is 5mm, basicity is 2.4;
By described second mixture pelletizing on pelletizer, obtain group's ball that granularity is 3mm;
Described ball is carried out cloth, and bed thickness during described cloth is 720mm, and the shape of the described bed of material is trapezoidal; The ventilation property of the described bed of material makes the negative pressure of sinter machine for-15.2KPa;
Lighted a fire by the described bed of material, during described igniting, the volumetric concentration of oxygen in combustion air is 4%, and in ignition process, the transfer pressure of oxygen is 0.55MPa, and in ignition process, the feed flow of oxygen is 300m
3/ h, in ignition process, the time of delivery of oxygen is 7min;
After described igniting completes, sintered by the group's ball after igniting, in described sintering process, the volumetric concentration of oxygen in combustion air is 25%, and the feed flow of the oxygen in sintering process is 1500m
3/ hour, in sintering process, the oxygen delivery time is 7 minutes, and in sintering process, the transfer pressure of oxygen is 0.55MPa; Chassis machine speed in sintering process is 2.05m/min.
According to the method described in technique scheme, test the basicity qualification rate of the vanadium titanium agglomerate method that the embodiment of the present invention 6 provides prepared, FeO content qualification rate, screening index, tumbler index and low temperature reduction degradation index.Detected result is, the basicity qualification rate of the vanadium titanium agglomerate that the method that the embodiment of the present invention 6 provides prepares is 92%, FeO content qualification rate is 95%, screening index is 13.5%, tumbler index is 75.6%, and low temperature reduction degradation index is 81.5%, up-to-standard.
According to the method described in technique scheme, vertical combustion speed, ignition intensity, sintering temperature and sintering fuel consumption when the method that the test embodiment of the present invention 6 provides sinters in the process preparing vanadium titanium agglomerate.Detected result is, vertical combustion speed when the method that the embodiment of the present invention 6 provides sinters in the process preparing vanadium titanium agglomerate is 20.6mm/min, ignition temperature is 1180 DEG C, and sintering temperature is 495 DEG C, and sintering fuel consumption is 51.5kg/t (agglomerate).
Comparative example 1
Prepare vanadium titanium agglomerate according to the method described in embodiment 1, in the process of lighting a fire and sinter, all do not pass into oxygen as different from Example 1.
According to the method described in technique scheme, test the basicity qualification rate of the vanadium titanium agglomerate method that comparative example 1 of the present invention provides prepared, FeO content qualification rate, screening index, tumbler index and low temperature reduction degradation index.Detected result is, the basicity qualification rate of the vanadium titanium agglomerate that the method that comparative example 1 of the present invention provides prepares is 92%, FeO content qualification rate is 95%, and screening index is 15%, and tumbler index is 75%, and low temperature reduction degradation index is 80%.
According to the method described in technique scheme, the vertical combustion speed when method that testing comparative example 1 of the present invention provides sinters in the process preparing vanadium titanium agglomerate, ignition intensity, sintering temperature and sintering fuel consumption.Detected result is, the vertical combustion speed when method that comparative example 1 of the present invention provides sinters in the process preparing vanadium titanium agglomerate is 20mm/min, and ignition temperature is 1150 DEG C, and sintering temperature is 480 DEG C, and sintering fuel consumption is 51.5kg/t.
As seen from the above embodiment, the invention provides a kind of preparation method of vanadium titanium agglomerate, comprising: by vanadium titano-magnetite and the mixing of common iron ore, obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%; Not containing vanadium, titanium in described common iron ore; Described first mixture, flux, fuel and water are mixed, obtains the second mixture; Described second mixture is carried out pelletizing, the group's of obtaining ball; Described ball is carried out cloth, igniting and sintering successively, and obtain vanadium titanium agglomerate, bed thickness during described cloth is 700mm ~ 760mm, and carrier of oxygen volume concentrations during described igniting is 1% ~ 3%; Carrier of oxygen volume concentrations during described sintering is 20% ~ 25%.Method provided by the invention improves the speed of vertical combustion and the ignition intensity of sintering in sintering process by oxygen enriching process, and then improves the temperature of sintering ignition, reduces the consumption of fuel in sintering process.
Claims (10)
1. a preparation method for vanadium titanium agglomerate, comprising:
By vanadium titano-magnetite and the mixing of common iron ore, obtain the first mixture, the Iron grade of described vanadium titano-magnetite is 50% ~ 60%, and the Iron grade of described common iron ore is 50% ~ 60%; Not containing vanadium and titanium in described common iron ore;
Described first mixture, flux, fuel and water are mixed, obtains the second mixture;
Described second mixture is carried out pelletizing, the group's of obtaining ball;
Described ball is carried out cloth, igniting and sintering successively, and obtain vanadium titanium agglomerate, bed thickness during described cloth is 700mm ~ 760mm, and carrier of oxygen volume concentrations during described igniting is 1% ~ 3%; Carrier of oxygen volume concentrations during described sintering is 20% ~ 25%.
2. method according to claim 1, is characterized in that, in described ignition process, the feed flow of oxygen is 100m
3/ hour ~ 400m
3/ hour.
3. method according to claim 1, is characterized in that, in described sintering process, the feed flow of oxygen is 1200m
3/ hour ~ 1800m
3/ hour.
4. method according to claim 1, is characterized in that, in described ignition process, the time of delivery of oxygen is 5 minutes ~ 10 minutes.
5. method according to claim 1, is characterized in that, in described sintering process, the transfer pressure of oxygen is 0.45MPa ~ 0.6MPa.
6. method according to claim 1, is characterized in that, the mass ratio of described vanadium titano-magnetite and common iron ore is (50 ~ 65): (10 ~ 20).
7. method according to claim 1, is characterized in that, the basicity of described second mixture is 2.2 ~ 2.6.
8. method according to claim 1, is characterized in that, described first mixture, flux and quality of fuel are than being (13 ~ 19): (2 ~ 5): 1.
9. method according to claim 1, is characterized in that, the diameter of described ball is 3mm ~ 8mm.
10. method according to claim 1, is characterized in that, the chassis machine speed in described sintering process is 1.5m/min ~ 2.3m/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107340161A (en) * | 2017-05-27 | 2017-11-10 | 石家庄钢铁有限责任公司 | Observe the preparation method that ore deposit mutually uses iron agglomerate sample |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| CN108018404A (en) * | 2017-12-21 | 2018-05-11 | 攀枝花钢城集团米易瑞地矿业有限公司 | The Application way of low calcium desulfurizing slag of hot metal |
| CN114350937A (en) * | 2021-12-28 | 2022-04-15 | 包头钢铁（集团）有限责任公司 | Method for optimizing quality of sinter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340161A (en) * | 2017-05-27 | 2017-11-10 | 石家庄钢铁有限责任公司 | Observe the preparation method that ore deposit mutually uses iron agglomerate sample |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| CN108018404A (en) * | 2017-12-21 | 2018-05-11 | 攀枝花钢城集团米易瑞地矿业有限公司 | The Application way of low calcium desulfurizing slag of hot metal |
| CN114350937A (en) * | 2021-12-28 | 2022-04-15 | 包头钢铁（集团）有限责任公司 | Method for optimizing quality of sinter |
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Application publication date: 20150204 |