CN104480299B - Method for preparing sintered ores by adding waste slag to chromium-containing-type vanadium-titanium magnetite concentrates - Google Patents

Method for preparing sintered ores by adding waste slag to chromium-containing-type vanadium-titanium magnetite concentrates Download PDF

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CN104480299B
CN104480299B CN201510018057.9A CN201510018057A CN104480299B CN 104480299 B CN104480299 B CN 104480299B CN 201510018057 A CN201510018057 A CN 201510018057A CN 104480299 B CN104480299 B CN 104480299B
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China
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sintering
sintered
waste
powder
mine
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CN201510018057.9A
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Chinese (zh)
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CN104480299A (en
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薛向欣
姜涛
杨松陶
周密
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东北大学
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16Sintering; Agglomerating
    • C22B1/18Sintering; Agglomerating in sinter pots

Abstract

The invention provides a method for preparing sintered ores by adding waste slag to chromium-containing-type vanadium-titanium magnetite concentrates. The method includes the following steps that (1), the chromium-containing-type vanadium-titanium magnetite concentrates, the waste slag, iron ore powder, lime powder, limestone powder, dolomite powder and return fines are prepared and serve as raw materials, wherein the alkalinity ranges from 1.9 to 2.3; (2), fuel is added so that a mixture can be prepared; (3), the mixture is placed in a mixer to be mixed so that ball materials can be prepared; (4), the ball materials are distributed in a sintering machine; (5), ignition, air draft and sintering are conducted, and sintering is finished when the sintering waste gas temperature starts to drop; (6), the sintered ores are obtained after crushing and screening. By the adoption of the method, the waste slag returns to the sintered ores to be produced, grained iron and effective metal oxides in the slag are recycled, SiO2 in the slag is fully utilized, the quality of the sintered ores is improved, the cost of the sintered ores is reduced, and the purposes of turning harm into good, turning waste into wealth and achieving recycling utilization are achieved.

Description

A kind of method that v-ti magnetite concentrate containing chromium type prepares sintering deposit with addition of waste
Technical field
The invention belongs to metallurgical technology field, more particularly to a kind of v-ti magnetite concentrate containing chromium type is with addition of waste preparation sintering The method of ore deposit.
Background technology
Contain higher vanadium, titanium, chromium component containing chromic vanadium-titanium ferroferrite, with high comprehensive utilization value;In blast furnace When vanadium-sodium vanadium extraction is blown in smelting-converter, a large amount of wastes in sodium vanadium extracting process, are generated, the stacking of these wastes will not only be accounted for A large amount of soils are used, and pollutes environment, particularly harmful, toxic metals threaten people to earth's surface and the seriously polluted of underground water source It is healthy, while containing the beneficiating ingredient, wherein FeO and SiO such as ferrum, vanadium, calcium, magnesium, manganese in waste2For main component, lose Waste disperses also can useful constituent, cause the wasting of resources.
The content of the invention
It is an object of the invention to provide a kind of method that v-ti magnetite concentrate containing chromium type prepares sintering deposit with addition of waste, passes through Sinter with addition of waste in v-ti magnetite concentrate containing chromium type, make the finished product sintering deposit for being suitable for smelting, improving sintering deposit While energy, using waste material, environmental pollution is reduced.
The v-ti magnetite concentrate containing chromium type of the present invention is carried out according to the following steps with addition of the method that waste prepares sintering deposit:
1st, prepare raw material, raw material components are by weight percentage:V-ti magnetite concentrate containing chromium type 45 ~ 55%, waste 1 ~ 3%, Iron Ore Powder 5 ~ 15%, white lime powder and agstone 4 ~ 6%, dolomite dusts 1 ~ 3% return mine 20 ~ 30%;The consumption of white lime powder is by whole things Material basicity is added for 1.9 ~ 2.3;Described waste is the waste that produces in sodium vanadium extracting process, Iron grade TFe20.0 ~ 40.0%, Contain SiO by weight percentage2 14.0 ~ 18.0%, CaO 1.0 ~ 5.0%, MgO 1.0 ~ 5.0%, Al2O3 1.0 ~ 3.0%, TiO2 5.0 ~ 15.0%, V2O5 0.5~3.5%;
2nd, raw material and fuel mix homogeneously are made into compound, fuel for raw material gross weight 4 ~ 4.7%;Described fuel For coke powder and/or anthracite;
3rd, compound is added water to be put in batch mixer and is mixed, the weight content of water is 2 ~ 4%, complete after adding water in compound In portion's material, the weight content of water is 7 ~ 7.5%, and material to be sintered is obtained after the completion of mixing, and in material to be sintered, 3 ~ 5mm of granularity beads are accounted for More than the 80% of whole sintering feed gross weights;
4th, by material to be sintered in sintering machine cloth, first spread thickness for 20 ~ 40mm bed material, then material to be sintered is layered on On bed material, material thickness to be sintered is 650 ~ 720mm;
5th, igniting down draft sintering is carried out on sintering machine;During sintering, firing temperature is 1100 ~ 1150 DEG C, and the duration of ignition is 60 ~ 120s, igniting negative pressure are 5000 ~ 8000Pa, and sintering negative pressure is 10000 ~ 16000Pa;When sintered discharge gas temperature begins to decline Complete sintering;
6th, be down to when sintered discharge gas temperature≤100 DEG C when, the material after sintering is taken out, crushing and screening go out granularity 5 ~ The part of 40mm, obtains sintering deposit.
The above-mentioned Iron grade TFe containing chromium type v-ti magnetite concentrate is 58.0 ~ 66.0%, by weight percentage containing SiO2 1.0 ~ 6.0%, CaO 0.4 ~ 2.6%, MgO 0.7 ~ 3.2%, Al2O3 0.6 ~ 1.9%, TiO2 0.7 ~ 3.9%, V2O5 0.1 ~ 0.6%, Cr2O3 0.01~0.15%。
In said method, described returns mine by v-ti magnetite concentrate containing chromium type, waste, Iron Ore Powder, white lime powder, agstone Material to be sintered of returning mine is mixed and made into dolomite dusts, is waste 1.4 ~ 3.8% by weight percentage, Iron Ore Powder 7.1 ~ 19%, white lime Powder and agstone 5.7 ~ 7.5%, dolomite dusts 1.85 ~ 3.75%, remaining is v-ti magnetite concentrate containing chromium type;Wherein white lime powder Consumption is added for 1.9 ~ 2.3 by all material basicity to be sintered is returned mine;Then material to be sintered will be returned mine by above-mentioned step 2 ~ 5 Method is sintered, and is cooled down after the completion of sintering, separates bed material of the granularity when the part of 10 ~ 16mm is as sintering, and remaining is crushed to grain Degree<The part of 5mm is used as returning mine;After the completion of sintering every time later, screen out<Return mine as sintering next time the part of 5mm.
The Iron grade TFe of above-mentioned Iron Ore Powder is 45.0 ~ 65.0%.
In the step of said method 2, in order to control mixture moisture, moisture is added twice, and the water for adding for the first time is accounted for entirely Portion adds water the 70 ~ 80% of gross weight, then the mix homogeneously in batch mixer, adds remaining water, continues to mix and pelletize.
Iron grade TFe50 ~ 60% of the sintering deposit that said method is obtained, by weight percentage containing SiO2 4.0 ~ 6.0%, CaO 6 ~ 18%, MgO 2.5 ~ 3.5%, Al2O3 1.9 ~ 3.0%, TiO2 1.5 ~ 4.0%, V2O5 0.2 ~ 0.4%, Cr2O3 0.001~0.02%。
The tumbler index of the sintering deposit that said method is obtained is 59 ~ 61%, yield rate 77 ~ 80%, cryogenic reducting powder index RDI+3.15For 48 ~ 51%.
In the method for the present invention, raw materials for sintering is based on v-ti magnetite concentrate containing chromium type then common with other with addition of waste Iron Ore Powder, flux, fuel, returning mine etc. is sintered;In sodium vanadium extraction waste, main component is FeO and SiO2, to avoid adding After waste, grade of sinter is less than 50%, and lime consumption amount is significantly increased, therefore waste amount of allocating is set to 1 ~ 3%;
The characteristics of v-ti magnetite concentrate containing chromium type has low titanium high impurity, belongs to difficult and burns Ore;Commonly Iron Ore Powder is Iron Ore Powder without vanadium titanium, can suitably with addition of more cheap Iron Ore Powder;
Due to containing more SiO in waste2, greatly, the heat consumed in sintering process is more, therefore will increase for liquid phase growing amount Fuel ratio just can guarantee that Sintering Operation Index does not decline;
Flux is used to improve sinter basicity, and being conducive to improving the quality of vanadium titanium sintering deposit, but cross high alkalinity can reduce burning Knot ore deposit grade, sinter basicity are controlled to 1.9 ~ 2.3;
It is to sinter strength and all favourable to the improvement of blast-furnace slag mobility containing a certain amount of MgO in sintering deposit, fit Suitable MgO advantageously reduces low temperature reduction degradation index, but has certain impact on cold strength and yield rate, therefore can be by adjusting Dolomite consumption is adjusting the content of MgO in sintering deposit, while adapting to the needs of blast-furnace slag mobility, adds in compound The dolomite of 1.5 ~ 4wt% is controlling the content of MgO in sintering deposit;
Firing temperature is controlled during sintering for 1100 ~ 1150 DEG C, igniting negative pressure is 5 ~ 8kPa, so can guarantee that the bed of material is grilled thoroughly, EGT will not cause to damage to main exhauster again, while reducing thermal loss;It is 10 ~ 16kPa to control to sinter negative pressure, is increased Draft and air quantity, overcome v-ti magnetite concentrate bed permeability poor, sinter the big defect of resistance;Reduce under the conditions of deep bed sintering vertical Sintering velocity, extends high temperature hold time, improves sinter strength.
The advantage of the method for the present invention is:In sintering production process, cost of material accounts for the 80% of sintering deposit totle drilling cost, Sintering deposit cost can be greatly lowered with addition of cheap waste, the purpose of pig iron cost is reduced;V-ti magnetite concentrate containing chromium type The quality that can improve sintering deposit is sintered with addition of waste;The crisp calcium titanium of generating property in sintering process containing chromic vanadium-titanium ferroferrite Ore deposit, calcium ferrite are low, and Binder Phase is few, cause that sinter strength is poor, yield rate is low;And iron ore powder sintering process is liquid phase generates in a large number Process, when the timing of sinter basicity one, increase SiO in sintering deposit2Content, TiO2Content accordingly declines, and Silicate Binding Phase increases Plus, perovskite growing amount will be reduced therewith;Simultaneously as SiO2It is more than TiO with the adhesion of CaO2Same Fe2O3Adhesion, SiO2Content increase is also unfavorable for that perovskite is generated, and the quality of sintering deposit accordingly improves;Therefore, waste returns sintering deposit production, Granulated iron, effective metal oxide in slag is not only reclaimed, and has taken full advantage of the SiO in slag2, so as to improve sintering mineral nitrogen Amount, reduce sintering deposit cost, reach turn harm into good, turn waste into wealth, the purpose that renewable resources are utilized.
Description of the drawings
Fig. 1 is the method flow schematic diagram that the v-ti magnetite concentrate containing chromium type of the present invention prepares sintering deposit with addition of waste.
Specific embodiment
The Sinter Component span of control prepared in the embodiment of the present invention is:Iron grade TFe50 ~ 60%, by weight percentage Containing SiO2 4.0 ~ 6.0%, CaO 6 ~ 18%, MgO2 .5 ~ 3.5%, Al2O3 1.9 ~ 3.0%, TiO2 1.5 ~ 4.0%, V2O5 0.2~ 0.4%, Cr2O3 0.001~0.02%。
In the embodiment of the present invention, tumbler index and yield rate are tested by GB8209-87 standards, and low temperature reduction degradation refers to Number is tested by GB/T13242-91 standards.
In the embodiment of the present invention, igniting is to be passed through natural gas and air ignition.
White lime powder, agstone and dolomite dusts in the embodiment of the present invention is commercial general industrial products.
Coke powder and anthracite in the embodiment of the present invention is commercial general industrial products.
In the embodiment of the present invention, first with v-ti magnetite concentrate containing chromium type, waste, Iron Ore Powder, white lime powder, agstone and in vain Marble dust is mixed and made into material to be sintered of returning mine, by weight percentage v-ti magnetite concentrate containing chromium type 56 ~ 78%, waste 1.4 ~ 3.8%, Iron Ore Powder 7.1 ~ 19%, white lime powder and agstone 5.7 ~ 7.5%, dolomite dusts 1.85 ~ 3.75%;The consumption of wherein white lime powder is pressed All return mine material basicity to be sintered to add for 1.9 ~ 2.3;Then material to be sintered of returning mine is burnt by the method for above-mentioned step 2 ~ 5 Knot, cools down after the completion of sintering, separates bed material of the granularity when the part of 10 ~ 16mm is as sintering, and remaining is crushed to granularity<5mm Part as returning mine;After the completion of sintering every time later, screen out<Return mine as sintering next time the part of 5mm.
The waste adopted in the embodiment of the present invention for sodium vanadium extracting process in the waste that produces, Iron grade TFe20.0 ~ 40.0%, by weight percentage containing SiO2 14.0 ~ 18.0%, CaO 1.0 ~ 5.0%, MgO 1.0 ~ 5.0%, Al2O3 1.0 ~ 3.0%, TiO2 5.0 ~ 15.0%, V2O5 0.5~3.5%。
The Iron grade TFe containing chromium type v-ti magnetite concentrate adopted in the embodiment of the present invention for 58.0 ~ 66.0%, by weight Percentage ratio contains SiO2 1.0 ~ 6.0%, CaO 0.4 ~ 2.6%, MgO 0.7 ~ 3.2%, Al2O3 0.6 ~ 1.9%, TiO2 0.7 ~ 3.9%, V2O5 0.1 ~ 0.6%, Cr2O3 0.01~0.15%;The Iron grade TFe of Iron Ore Powder is 45.0 ~ 65.0%.
The Iron grade TFe of the Iron Ore Powder adopted in the embodiment of the present invention is for 45.0 ~ 65.0%.
Granularity≤the 0.5mm of v-ti magnetite concentrate containing chromium type and Iron Ore Powder in the embodiment of the present invention, and granularity< The part of 0.074mm is no less than 70%, the granularity≤3mm of waste, the granularity≤3mm of white lime powder and limestone, the grain of dolomite dusts Degree≤0.5mm, the granularity≤3mm of fuel, phosphorus content is 86 ~ 90%.
Embodiment 1
Prepare raw material, raw material components are by weight percentage:V-ti magnetite concentrate containing chromium type 55%, waste 1%, Iron Ore Powder 15%, white lime powder and agstone 4%, dolomite dusts 3% return mine 22%;The consumption of white lime powder is by whole material basicity(R=CaO/ SiO2)Add for 1.9;Granularity≤the 0.5mm of v-ti magnetite concentrate containing chromium type and Iron Ore Powder, and granularity<The part of 0.074mm No less than 70%;Granularity≤the 3mm of waste;Granularity≤the 3mm of white lime powder and limestone, the granularity≤0.5mm of dolomite dusts;
Raw material and fuel mix homogeneously are made into compound, fuel for raw material gross weight 4%;Described fuel is coke powder And anthracite;Fuel granularity≤3mm, phosphorus content is 90%;
In compound, 4%, in the whole materials after adding water, the weight content of water is 7% to the weight content of water, and mixing is completed After obtain material to be sintered, in material to be sintered, 3 ~ 5mm of granularity beads account for more than the 80% of whole sintering feed gross weights;In order to control to mix Material moisture is closed, moisture added twice, the water for adding for the first time is accounted for and all adds water the 70 ~ 80% of gross weight, is then mixed in batch mixer Close uniform, add remaining water, continue to mix and pelletize;
By material to be sintered in sintering machine cloth, first spread thickness for 20mm bed material, material to be sintered is layered on into bed material then On, material thickness to be sintered is 650mm;
Igniting down draft sintering is carried out on sintering machine;During sintering, firing temperature is 1100 DEG C, and the duration of ignition is 120s, igniting Negative pressure is 5000Pa, and sintering negative pressure is 10000Pa;Sintering is completed when sintered discharge gas temperature begins to decline;
Be down to when sintered discharge gas temperature≤100 DEG C when, the material after sintering is taken out, crushing and screening goes out granularity in 5 ~ 40mm Part, obtain sintering deposit, tumbler index is 60%, yield rate 78%, cryogenic reducting powder index RDI+3.15For 48%.
Embodiment 2
Method with embodiment 1, difference is:
(1)V-ti magnetite concentrate containing chromium type 45%, waste 3%, Iron Ore Powder 14%, white lime powder and agstone 6%, dolomite dusts 2%, return mine 30%;The consumption of white lime powder is by whole material basicity(R=CaO/SiO2)Add for 2.3;
(2)Raw material and fuel mix homogeneously are made into compound, fuel for raw material gross weight 4.2%;Described fuel For coke powder;Fuel phosphorus content is 89%;
(3)In compound, 2%, in the whole materials after adding water, the weight content of water is 7.5% to the weight content of water;Moisture Add twice, the water for adding for the first time is accounted for and all adds water the 70 ~ 80% of gross weight;
(4)By material to be sintered in sintering machine cloth, first spread thickness for 25mm bed material, material to be sintered is layered on into bottom then On material, material thickness to be sintered is 660mm;
(5)Igniting down draft sintering is carried out on sintering machine;During sintering, firing temperature is 1130 DEG C, and the duration of ignition is 90s, point Fiery negative pressure is 6000Pa, and sintering negative pressure is 12000Pa;
(6)The tumbler index of sintering deposit is 61%, yield rate 77%, cryogenic reducting powder index RDI+3.15For 49%.
Embodiment 3
Method with embodiment 1, difference is:
(1)V-ti magnetite concentrate containing chromium type 55%, waste 3%, Iron Ore Powder 13%, white lime powder and agstone 6%, dolomite dusts 3%, return mine 20%;The consumption of white lime powder is by whole material basicity(R=CaO/SiO2)Add for 2.2;
(2)Raw material and fuel mix homogeneously are made into compound, fuel for raw material gross weight 4.4%;Described fuel For anthracite;Fuel phosphorus content is 88%;
(3)In compound, 3.5%, in the whole materials after adding water, the weight content of water is 7.3% to the weight content of water; Moisture is added twice, and the water for adding for the first time is accounted for and all adds water the 70 ~ 80% of gross weight;
(4)By material to be sintered in sintering machine cloth, first spread thickness for 30mm bed material, material to be sintered is layered on into bottom then On material, material thickness to be sintered is 680mm;
(5)Igniting down draft sintering is carried out on sintering machine;During sintering, firing temperature is 1150 DEG C, and the duration of ignition is 60s, point Fiery negative pressure is 7000Pa, and sintering negative pressure is 14000Pa;
(6)The tumbler index of sintering deposit is 59%, yield rate 80%, cryogenic reducting powder index RDI+3.15For 50%.
Embodiment 4
Method with embodiment 1, difference is:
(1)V-ti magnetite concentrate containing chromium type 50%, waste 2%, Iron Ore Powder 13%, white lime powder and agstone 5%, dolomite dusts 1%, return mine 29%;The consumption of white lime powder is by whole material basicity(R=CaO/SiO2)Add for 2.0;
(2)Raw material and fuel mix homogeneously are made into compound, fuel for raw material gross weight 4.5%;Described fuel For coke powder and anthracite;Fuel phosphorus content is 87%;
(3)In compound, 3.5%, in the whole materials after adding water, the weight content of water is 7% to the weight content of water;Water Add at twice, the water for adding for the first time is accounted for and all adds water the 70 ~ 80% of gross weight;
(4)By material to be sintered in sintering machine cloth, first spread thickness for 35mm bed material, material to be sintered is layered on into bottom then On material, material thickness to be sintered is 700mm;
(5)Igniting down draft sintering is carried out on sintering machine;During sintering, firing temperature is 1120 DEG C, and the duration of ignition is 100s, Igniting negative pressure is 8000Pa, and sintering negative pressure is 16000Pa;
(6)The tumbler index of sintering deposit is 60%, yield rate 79%, cryogenic reducting powder index RDI+3.15For 51%.
Embodiment 5
Method with embodiment 1, difference is:
(1)V-ti magnetite concentrate containing chromium type 55%, waste 3%, Iron Ore Powder 5%, white lime powder and agstone 5%, dolomite dusts 2%, return mine 30%;The consumption of white lime powder is by whole material basicity(R=CaO/SiO2)Add for 2.1;
(2)Raw material and fuel mix homogeneously are made into compound, fuel for raw material gross weight 4.7%;Described fuel For coke powder and anthracite;Fuel phosphorus content is 86%;
(3)In compound, 3%, in the whole materials after adding water, the weight content of water is 7% to the weight content of water;
(4)By material to be sintered in sintering machine cloth, first spread thickness for 40mm bed material, material to be sintered is layered on into bottom then On material, material thickness to be sintered is 720mm;
(5)Igniting down draft sintering is carried out on sintering machine;During sintering, firing temperature is 1140 DEG C, and the duration of ignition is 80s, point Fiery negative pressure is 6000Pa, and sintering negative pressure is 13000Pa;
(6)The tumbler index of sintering deposit be 60 yield rates 80%, cryogenic reducting powder index RDI+3.15For 50%.

Claims (1)

1. a kind of method that v-ti magnetite concentrate containing chromium type prepares sintering deposit with addition of waste, it is characterised in that enter according to the following steps OK:
(1)Prepare raw material, raw material components are by weight percentage:V-ti magnetite concentrate containing chromium type 45 ~ 55%, waste 1 ~ 3%, iron mine Powder 5 ~ 15%, white lime powder and agstone 4 ~ 6%, dolomite dusts 1 ~ 3% return mine 20 ~ 30%;The consumption of white lime powder is by whole material alkali Spend and add for 1.9 ~ 2.1;Described waste is the waste that produces in sodium vanadium extracting process, Iron grade TFe20.0 ~ 40.0%, by weight Amount percentage ratio contains SiO2 14.0 ~ 18.0%, CaO 1.0 ~ 5.0%, MgO 1.0 ~ 5.0%, Al2O3 1.0 ~ 3.0%, TiO2 5.0~ 15.0%, V2O5 0.5~3.5%;The described Iron grade TFe containing chromium type v-ti magnetite concentrate is 58.0 ~ 66.0%, by weight percentage Than containing SiO2 1.0 ~ 6.0%, CaO 0.4 ~ 2.6%, MgO 0.7 ~ 3.2%, Al2O3 0.6 ~ 1.9%, TiO2 0.7 ~ 3.9%, V2O5 0.1 ~ 0.6%, Cr2O3 0.01~0.15%;The Iron grade TFe of described Iron Ore Powder is 45.0 ~ 65.0%;
(2)Raw material and fuel mix homogeneously are made into compound, fuel for raw material gross weight 4 ~ 4.7%;Described fuel is Coke powder and/or anthracite;
(3)Compound is added water to be put in batch mixer and is mixed, in compound the weight content of water 2 ~ 4%, the whole things after adding water In material, the weight content of water is 7 ~ 7.5%, and material to be sintered is obtained after the completion of mixing, and in material to be sintered, 3 ~ 5mm of granularity beads account for whole More than the 80% of sintering feed gross weight;
(4)By material to be sintered in sintering machine cloth, first spread thickness for 20 ~ 40mm bed material, material to be sintered is layered on into bottom then On material, material thickness to be sintered is 650 ~ 720mm;
(5)Igniting down draft sintering is carried out on sintering machine;During sintering firing temperature be 1100 ~ 1150 DEG C, the duration of ignition be 60 ~ 120s, igniting negative pressure are 5000 ~ 8000Pa, and sintering negative pressure is 10000 ~ 16000Pa;It is complete when sintered discharge gas temperature begins to decline Into sintering;
(6)Be down to when sintered discharge gas temperature≤100 DEG C when, the material after sintering is taken out, crushing and screening goes out granularity in 5 ~ 40mm Part, obtain sintering deposit, Iron grade TFe50 ~ 60%, by weight percentage containing SiO2 4.0 ~ 6.0%, CaO 6 ~ 18%, MgO 2.5 ~ 3.5%, Al2O3 1.9 ~ 3.0%, TiO2 1.5 ~ 4.0%, V2O5 0.2 ~ 0.4%, Cr2O3 0.001~0.02%;Sintering deposit turn Drum index is 59 ~ 61%, yield rate 77 ~ 80%, cryogenic reducting powder index RDI+3.15For 48 ~ 51%;Described returns mine by containing chromium type V-ti magnetite concentrate, waste, Iron Ore Powder, white lime powder, agstone and dolomite dusts are mixed and made into material to be sintered of returning mine, by weight Percentage ratio is waste 1.4 ~ 3.8%, Iron Ore Powder 7.1 ~ 19%, white lime powder and agstone 5.7 ~ 7.5%, dolomite dusts 1.85 ~ 3.75%, remaining is v-ti magnetite concentrate containing chromium type;Wherein the consumption of white lime powder by all returning mine material basicity to be sintered for 1.9 ~ 2.3 add;Then material to be sintered will be returned mine by above-mentioned step(2)~(5)Method sintering, after the completion of sintering cool down, separate Bed material of the granularity when the part of 10 ~ 16mm is as sintering, remaining is crushed to granularity<The part of 5mm is used as returning mine;Every time later After the completion of sintering, screen out<The part of 5mm is used as returning mine.
CN201510018057.9A 2015-01-14 2015-01-14 Method for preparing sintered ores by adding waste slag to chromium-containing-type vanadium-titanium magnetite concentrates CN104480299B (en)

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