CN104480299A - 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 PDFInfo
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- CN104480299A CN104480299A CN201510018057.9A CN201510018057A CN104480299A CN 104480299 A CN104480299 A CN 104480299A CN 201510018057 A CN201510018057 A CN 201510018057A CN 104480299 A CN104480299 A CN 104480299A
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- sintered
- waste
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- powder
- magnetite concentrate
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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
- C22B1/18—Sintering; 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
Technical field
The invention belongs to metallurgical technology field, particularly a kind of method preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste.
Background technology
Contain higher vanadium, titanium, chromium component containing chromic vanadium-titanium ferroferrite, there is high comprehensive utilization value; When vanadium-sodium vanadium extraction is blown in blast-furnace smelting-converter, a large amount of waste is created in sodium vanadium extracting process, the stacking of these wastes not only will take a large amount of soil, and contaminate environment, particularly harmful, toxic metal threatens the healthy of people to earth's surface and the seriously polluted of underground water source, contain the beneficiating ingredients such as iron, vanadium, calcium, magnesium, manganese, wherein FeO and SiO in waste simultaneously
2for main component, abandon waste and useful component also can be made to disperse, cause the wasting of resources.
Summary of the invention
The object of this invention is to provide a kind of method preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste, by sintering to containing in chromium type v-ti magnetite concentrate with addition of waste, make the finished product agglomerate being suitable for smelting, while raising sintering performance, utilize waste material, reduce environmental pollution.
The method preparing agglomerate with addition of waste containing chromium type v-ti magnetite concentrate of the present invention is carried out according to the following steps:
1, prepare raw material, feed composition is by weight percentage: containing chromium type v-ti magnetite concentrate 45 ~ 55%, waste 1 ~ 3%, powdered iron ore 5 ~ 15%, lime powder and limestone powder 4 ~ 6%, and ground dolomite 1 ~ 3%, returns mine 20 ~ 30%; The consumption of lime powder is 1.9 ~ 2.3 to add by whole material basicity; Described waste is the waste produced in sodium vanadium extracting process, Iron grade TFe20.0 ~ 40.0%, by weight percentage containing SiO
214.0 ~ 18.0%, CaO 1.0 ~ 5.0%, MgO 1.0 ~ 5.0%, Al
2o
31.0 ~ 3.0%, TiO
25.0 ~ 15.0%, V
2o
50.5 ~ 3.5%;
2, raw material and fuel mix are evenly made compound, fuel is 4 ~ 4.7% of raw material gross weight; Described fuel is coke powder and/or hard coal;
3, compound is added water put into mixer and mix, in compound, the weight content of water is 2 ~ 4%, in whole materials after adding water, the weight content of water is 7 ~ 7.5%, has mixed rear acquisition material to be sintered, and in material to be sintered, granularity 3 ~ 5mm bead accounts for more than 80% of whole sintered material gross weight;
4, by material to be sintered cloth in sinter machine, first spreading thickness is the bed material of 20 ~ 40mm, and be then layered on bed material by material to be sintered, material thickness to be sintered is 650 ~ 720mm;
5, on sinter machine, igniting down draft sintering is carried out; During sintering, ignition temperature is 1100 ~ 1150 DEG C, and ignition time is 60 ~ 120s, and igniting negative pressure is 5000 ~ 8000Pa, and sintering negative pressure is 10000 ~ 16000Pa; Sintering is completed when sintered discharge gas temperature starts to decline;
6, when sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate.
The above-mentioned Iron grade TFe containing chromium type v-ti magnetite concentrate is 58.0 ~ 66.0%, by weight percentage containing SiO
21.0 ~ 6.0%, CaO 0.4 ~ 2.6%, MgO 0.7 ~ 3.2%, Al
2o
30.6 ~ 1.9%, TiO
20.7 ~ 3.9%, V
2o
50.1 ~ 0.6%, Cr
2o
30.01 ~ 0.15%.
In aforesaid method, described returning mine is mixed and made into by containing chromium type v-ti magnetite concentrate, waste, powdered iron ore, lime powder, limestone powder and ground dolomite material to be sintered of returning mine, be waste 1.4 ~ 3.8% by weight percentage, powdered iron ore 7.1 ~ 19%, lime powder and limestone powder 5.7 ~ 7.5%, ground dolomite 1.85 ~ 3.75%, all the other are for containing chromium type v-ti magnetite concentrate; Wherein the consumption of lime powder is 1.9 ~ 2.3 to add by material basicity to be sintered of all returning mine; Then the method for material to be sintered by above-mentioned step 2 ~ 5 of returning mine sintered, sintered rear cooling, separate the part of granularity at 10 ~ 16mm as bed material during sintering, all the other are crushed to the part of granularity <5mm as returning mine; After having sintered, the part of the <5mm sieved out is as having returned mine of sintering next time later at every turn.
The Iron grade TFe of above-mentioned powdered iron ore is 45.0 ~ 65.0%.
In the step 2 of aforesaid method, in order to control mixture moisture, moisture adds for twice, and the water that first time adds accounts for 70 ~ 80% of the gross weight that all adds water, then mixes in mixer, adds remaining water, continues mix and granulate.
Iron grade TFe50 ~ 60% of the agglomerate that aforesaid method obtains, by weight percentage containing SiO
24.0 ~ 6.0%, CaO 6 ~ 18%, MgO 2.5 ~ 3.5%, Al
2o
31.9 ~ 3.0%, TiO
21.5 ~ 4.0%, V
2o
50.2 ~ 0.4%, Cr
2o
30.001 ~ 0.02%.
The tumbler index of the agglomerate that aforesaid method obtains is 59 ~ 61%, yield rate 77 ~ 80%, cryogenic reducting powder index RDI
+ 3.15be 48 ~ 51%.
In method of the present invention, raw materials for sintering is based on containing chromium type v-ti magnetite concentrate, then with addition of waste and other common powdered iron ore, flux, fuel, returning mine etc. sinters; In sodium vanadium extraction waste, main component is FeO and SiO
2, for grade of sinter after avoiding adding waste is lower than 50%, and significantly increase lime consumption amount, therefore the waste amount of allocating into is decided to be 1 ~ 3%;
The described feature containing chromium type v-ti magnetite concentrate with low titanium height impurity, belongs to difficult and burns ore; Common powdered iron ore is not containing the powdered iron ore of vanadium titanium, can suitably with addition of more cheap powdered iron ore;
Owing to containing more SiO in waste
2, liquid phase growing amount is large, and the heat consumed in sintering process is more, therefore will increase fuel ratio guarantee Sintering Operation Index and not decline;
Flux, for improving sinter basicity, is conducive to the quality improving vanadium titanium agglomerate, but high alkalinity can reduce grade of sinter excessively, and it is 1.9 ~ 2.3 that sinter basicity controls;
A certain amount of MgO is contained to sinter strength with all favourable to the improvement of blast-furnace slag mobility in agglomerate, suitable MgO is conducive to reducing low temperature reduction degradation index, but there is certain influence to cold strength and yield rate, therefore the content of MgO in agglomerate is adjusted by adjustment rhombspar consumption, the needs of simultaneous adaptation blast-furnace slag mobility, add the rhombspar of 1.5 ~ 4wt% to control the content of MgO in agglomerate in compound;
Controlling ignition temperature during sintering is 1100 ~ 1150 DEG C, and igniting negative pressure is 5 ~ 8kPa, and can ensure that the bed of material is grilled thoroughly like this, spent air temperture can not cause damage to main exhauster again, reduces calorific loss simultaneously; Controlling sintering negative pressure is 10 ~ 16kPa, increases draft and air quantity, overcomes v-ti magnetite concentrate bed permeability poor, the defect that sintering resistance is large; Deep bed sintering condition declines low vertical sintering speed, extends high temperature hold time, improves sinter strength.
The advantage of method of the present invention is: in sintering production process, and raw materials cost accounts for 80% of agglomerate total cost, can significantly reduce agglomerate cost with addition of cheap waste, reaches the object reducing pig iron cost; Carry out sintering the quality that can improve agglomerate with addition of waste containing chromium type v-ti magnetite concentrate; Containing the uhligite that generating property in chromic vanadium-titanium ferroferrite sintering process is crisp, calcium ferrite is low, and Binder Phase is few, causes that sinter strength is poor, yield rate is low; And the iron ore powder sintering process process that to be liquid phase generate in a large number, when sinter basicity one timing, increase SiO in agglomerate
2content, TiO
2the corresponding decline of content, Silicate Binding Phase increases, and uhligite growing amount will reduce thereupon; Meanwhile, due to SiO
2bonding force with CaO is greater than TiO
2same Fe
2o
3bonding force, SiO
2content increase is also unfavorable for that uhligite generates, the corresponding improvement of quality of agglomerate; Therefore, waste returns agglomerate and produces, and has not only reclaimed granulated iron in slag, effective metal oxide compound, and has taken full advantage of the SiO in slag
2, thus improve sinter quality, reduce agglomerate cost, reach turn harm into good, turn waste into wealth, object that renewable resources utilizes.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste of the present invention.
Embodiment
The Sinter Component span of control prepared in the embodiment of the present invention is: Iron grade TFe50 ~ 60%, by weight percentage containing SiO
24.0 ~ 6.0%, CaO 6 ~ 18%, MgO2 .5 ~ 3.5%, Al
2o
31.9 ~ 3.0%, TiO
21.5 ~ 4.0%, V
2o
50.2 ~ 0.4%, Cr
2o
30.001 ~ 0.02%.
In the embodiment of the present invention, rotary drum exponential sum yield rate is tested by GB8209-87 standard, and cryogenic reducting powder index is tested by GB/T13242-91 standard.
In the embodiment of the present invention, igniting passes into Sweet natural gas and air ignition.
Lime powder, limestone powder and ground dolomite in the embodiment of the present invention are commercial general industrial products.
Coke powder in the embodiment of the present invention and hard coal are commercial general industrial products.
In the embodiment of the present invention, first be mixed and made into containing chromium type v-ti magnetite concentrate, waste, powdered iron ore, lime powder, limestone powder and ground dolomite material to be sintered of returning mine, by weight percentage containing chromium type v-ti magnetite concentrate 56 ~ 78%, waste 1.4 ~ 3.8%, powdered iron ore 7.1 ~ 19%, lime powder and limestone powder 5.7 ~ 7.5%, ground dolomite 1.85 ~ 3.75%; Wherein the consumption of lime powder is 1.9 ~ 2.3 to add by material basicity to be sintered of all returning mine; Then the method for material to be sintered by above-mentioned step 2 ~ 5 of returning mine sintered, sintered rear cooling, separate the part of granularity at 10 ~ 16mm as bed material during sintering, all the other are crushed to the part of granularity <5mm as returning mine; After having sintered, the part of the <5mm sieved out is as having returned mine of sintering next time later at every turn.
The waste adopted in the embodiment of the present invention is the waste produced in sodium vanadium extracting process, Iron grade TFe20.0 ~ 40.0%, by weight percentage containing SiO
214.0 ~ 18.0%, CaO 1.0 ~ 5.0%, MgO 1.0 ~ 5.0%, Al
2o
31.0 ~ 3.0%, TiO
25.0 ~ 15.0%, V
2o
50.5 ~ 3.5%.
The Iron grade TFe containing chromium type v-ti magnetite concentrate adopted in the embodiment of the present invention is 58.0 ~ 66.0%, by weight percentage containing SiO
21.0 ~ 6.0%, CaO 0.4 ~ 2.6%, MgO 0.7 ~ 3.2%, Al
2o
30.6 ~ 1.9%, TiO
20.7 ~ 3.9%, V
2o
50.1 ~ 0.6%, Cr
2o
30.01 ~ 0.15%; The Iron grade TFe of powdered iron ore is 45.0 ~ 65.0%.
The Iron grade TFe of the powdered iron ore adopted in the embodiment of the present invention is 45.0 ~ 65.0%.
Granularity≤the 0.5mm containing chromium type v-ti magnetite concentrate and powdered iron ore in the embodiment of the present invention, and the part of granularity <0.074mm is no less than 70%, granularity≤the 3mm of waste, granularity≤the 3mm of lime powder and Wingdale, granularity≤the 0.5mm of ground dolomite, granularity≤the 3mm of fuel, carbon content is 86 ~ 90%.
Embodiment 1
Prepare raw material, feed composition is by weight percentage: containing chromium type v-ti magnetite concentrate 55%, waste 1%, powdered iron ore 15%, lime powder and limestone powder 4%, and ground dolomite 3%, returns mine 22%; The consumption of lime powder is by whole material basicity (R=CaO/SiO
2) be 1.9 to add; Containing the granularity≤0.5mm of chromium type v-ti magnetite concentrate and powdered iron ore, and the part of granularity <0.074mm is no less than 70%; Granularity≤the 3mm of waste; Granularity≤the 3mm of lime powder and Wingdale, the granularity≤0.5mm of ground dolomite;
Raw material and fuel mix are evenly made compound, and fuel is 4% of raw material gross weight; Described fuel is coke powder and hard coal; Fuel granularity≤3mm, carbon content is 90%;
In compound, the weight content of water is 4%, and in the whole materials after adding water, the weight content of water is 7%, has mixed rear acquisition material to be sintered, and in material to be sintered, granularity 3 ~ 5mm bead accounts for more than 80% of whole sintered material gross weight; In order to control mixture moisture, moisture adds for twice, and the water that first time adds accounts for 70 ~ 80% of the gross weight that all adds water, then mixes in mixer, adds remaining water, continues mix and granulate;
By material to be sintered cloth in sinter machine, first spreading thickness is the bed material of 20mm, and be then layered on bed material by material to be sintered, material thickness to be sintered is 650mm;
Sinter machine carries out igniting down draft sintering; During sintering, ignition temperature is 1100 DEG C, and ignition time is 120s, and igniting negative pressure is 5000Pa, and sintering negative pressure is 10000Pa; Sintering is completed when sintered discharge gas temperature starts to decline;
When sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate, tumbler index is 60%, yield rate 78%, cryogenic reducting powder index RDI
+ 3.15be 48%.
Embodiment 2
Method is with embodiment 1, and difference is:
(1) containing chromium type v-ti magnetite concentrate 45%, waste 3%, powdered iron ore 14%, lime powder and limestone powder 6%, ground dolomite 2%, returns mine 30%; The consumption of lime powder is by whole material basicity (R=CaO/SiO
2) be 2.3 to add;
(2) raw material and fuel mix are evenly made compound, fuel is 4.2% of raw material gross weight; Described fuel is coke powder; Fuel carbon content is 89%;
(3) in compound, the weight content of water is 2%, and in the whole materials after adding water, the weight content of water is 7.5%; Moisture adds for twice, and the water that first time adds accounts for 70 ~ 80% of the gross weight that all adds water;
(4) by material to be sintered cloth in sinter machine, first spreading thickness is the bed material of 25mm, and be then layered on bed material by material to be sintered, material thickness to be sintered is 660mm;
(5) on sinter machine, igniting down draft sintering is carried out; During sintering, ignition temperature is 1130 DEG C, and ignition time is 90s, and igniting negative pressure is 6000Pa, and sintering negative pressure is 12000Pa;
(6) tumbler index of agglomerate is 61%, yield rate 77%, cryogenic reducting powder index RDI
+ 3.15be 49%.
Embodiment 3
Method is with embodiment 1, and difference is:
(1) containing chromium type v-ti magnetite concentrate 55%, waste 3%, powdered iron ore 13%, lime powder and limestone powder 6%, ground dolomite 3%, returns mine 20%; The consumption of lime powder is by whole material basicity (R=CaO/SiO
2) be 2.2 to add;
(2) raw material and fuel mix are evenly made compound, fuel is 4.4% of raw material gross weight; Described fuel is hard coal; Fuel carbon content is 88%;
(3) in compound, the weight content of water is 3.5%, and in the whole materials after adding water, the weight content of water is 7.3%; Moisture adds for twice, and the water that first time adds accounts for 70 ~ 80% of the gross weight that all adds water;
(4) by material to be sintered cloth in sinter machine, first spreading thickness is the bed material of 30mm, and be then layered on bed material by material to be sintered, material thickness to be sintered is 680mm;
(5) on sinter machine, igniting down draft sintering is carried out; During sintering, ignition temperature is 1150 DEG C, and ignition time is 60s, and igniting negative pressure is 7000Pa, and sintering negative pressure is 14000Pa;
(6) tumbler index of agglomerate is 59%, yield rate 80%, cryogenic reducting powder index RDI
+ 3.15be 50%.
Embodiment 4
Method is with embodiment 1, and difference is:
(1) containing chromium type v-ti magnetite concentrate 50%, waste 2%, powdered iron ore 13%, lime powder and limestone powder 5%, ground dolomite 1%, returns mine 29%; The consumption of lime powder is by whole material basicity (R=CaO/SiO
2) be 2.0 to add;
(2) raw material and fuel mix are evenly made compound, fuel is 4.5% of raw material gross weight; Described fuel is coke powder and hard coal; Fuel carbon content is 87%;
(3) in compound, the weight content of water is 3.5%, and in the whole materials after adding water, the weight content of water is 7%; Moisture adds for twice, and the water that first time adds accounts for 70 ~ 80% of the gross weight that all adds water;
(4) by material to be sintered cloth in sinter machine, first spreading thickness is the bed material of 35mm, and be then layered on bed material by material to be sintered, material thickness to be sintered is 700mm;
(5) on sinter machine, igniting down draft sintering is carried out; During sintering, ignition temperature is 1120 DEG C, and ignition time is 100s, and igniting negative pressure is 8000Pa, and sintering negative pressure is 16000Pa;
(6) tumbler index of agglomerate is 60%, yield rate 79%, cryogenic reducting powder index RDI
+ 3.15be 51%.
Embodiment 5
Method is with embodiment 1, and difference is:
(1) containing chromium type v-ti magnetite concentrate 55%, waste 3%, powdered iron ore 5%, lime powder and limestone powder 5%, ground dolomite 2%, returns mine 30%; The consumption of lime powder is by whole material basicity (R=CaO/SiO
2) be 2.1 to add;
(2) raw material and fuel mix are evenly made compound, fuel is 4.7% of raw material gross weight; Described fuel is coke powder and hard coal; Fuel carbon content is 86%;
(3) in compound, the weight content of water is 3%, and in the whole materials after adding water, the weight content of water is 7%;
(4) by material to be sintered cloth in sinter machine, first spreading thickness is the bed material of 40mm, and be then layered on bed material by material to be sintered, material thickness to be sintered is 720mm;
(5) on sinter machine, igniting down draft sintering is carried out; During sintering, ignition temperature is 1140 DEG C, and ignition time is 80s, and igniting negative pressure is 6000Pa, and sintering negative pressure is 13000Pa;
(6) tumbler index of agglomerate is 60 yield rates 80%, cryogenic reducting powder index RDI
+ 3.15be 50%.
Claims (6)
1. prepare a method for agglomerate containing chromium type v-ti magnetite concentrate with addition of waste, it is characterized in that carrying out according to the following steps:
(1) prepare raw material, feed composition is by weight percentage: containing chromium type v-ti magnetite concentrate 45 ~ 55%, waste 1 ~ 3%, powdered iron ore 5 ~ 15%, lime powder and limestone powder 4 ~ 6%, and ground dolomite 1 ~ 3%, returns mine 20 ~ 30%; The consumption of lime powder is 1.9 ~ 2.3 to add by whole material basicity; Described waste is the waste produced in sodium vanadium extracting process, Iron grade TFe20.0 ~ 40.0%, by weight percentage containing SiO
214.0 ~ 18.0%, CaO 1.0 ~ 5.0%, MgO 1.0 ~ 5.0%, Al
2o
31.0 ~ 3.0%, TiO
25.0 ~ 15.0%, V
2o
50.5 ~ 3.5%;
(2) raw material and fuel mix are evenly made compound, fuel is 4 ~ 4.7% of raw material gross weight; Described fuel is coke powder and/or hard coal;
(3) compound is added water put into mixer and mix, in compound, the weight content of water is 2 ~ 4%, in whole materials after adding water, the weight content of water is 7 ~ 7.5%, has mixed rear acquisition material to be sintered, and in material to be sintered, granularity 3 ~ 5mm bead accounts for more than 80% of whole sintered material gross weight;
(4) by material to be sintered cloth in sinter machine, first spreading thickness is the bed material of 20 ~ 40mm, and be then layered on bed material by material to be sintered, material thickness to be sintered is 650 ~ 720mm;
(5) on sinter machine, igniting down draft sintering is carried out; During sintering, ignition temperature is 1100 ~ 1150 DEG C, and ignition time is 60 ~ 120s, and igniting negative pressure is 5000 ~ 8000Pa, and sintering negative pressure is 10000 ~ 16000Pa; Sintering is completed when sintered discharge gas temperature starts to decline;
(6) when sintered discharge gas temperature be down to≤100 DEG C time, by sintering after material take out, crushing and screening goes out the part of granularity at 5 ~ 40mm, obtain agglomerate.
2. a kind of method preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste according to claim 1, it is characterized in that described returning mine is mixed and made into by containing chromium type v-ti magnetite concentrate, waste, powdered iron ore, lime powder, limestone powder and ground dolomite material to be sintered of returning mine, be waste 1.4 ~ 3.8% by weight percentage, powdered iron ore 7.1 ~ 19%, lime powder and limestone powder 5.7 ~ 7.5%, ground dolomite 1.85 ~ 3.75%, all the other are for containing chromium type v-ti magnetite concentrate; Wherein the consumption of lime powder is 1.9 ~ 2.3 to add by material basicity to be sintered of all returning mine; Then the method for material to be sintered by above-mentioned step (2) ~ (5) of returning mine sintered, sintered rear cooling, separate the part of granularity at 10 ~ 16mm as bed material during sintering, all the other are crushed to the part of granularity <5mm as returning mine; After having sintered, the part of the <5mm sieved out is as returning mine later at every turn.
3. a kind of method preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste according to claim 1, is characterized in that the described Iron grade TFe containing chromium type v-ti magnetite concentrate is 58.0 ~ 66.0%, by weight percentage containing SiO
21.0 ~ 6.0%, CaO 0.4 ~ 2.6%, MgO 0.7 ~ 3.2%, Al
2o
30.6 ~ 1.9%, TiO
20.7 ~ 3.9%, V
2o
50.1 ~ 0.6%, Cr
2o
30.01 ~ 0.15%.
4. a kind of method preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste according to claim 1, is characterized in that the Iron grade TFe of described powdered iron ore is 45.0 ~ 65.0%.
5. a kind of method preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste according to claim 1, is characterized in that Iron grade TFe50 ~ 60% of the agglomerate obtained, by weight percentage containing SiO
24.0 ~ 6.0%, CaO 6 ~ 18%, MgO 2.5 ~ 3.5%, Al
2o
31.9 ~ 3.0%, TiO
21.5 ~ 4.0%, V
2o
50.2 ~ 0.4%, Cr
2o
30.001 ~ 0.02%.
6. a kind of method preparing agglomerate containing chromium type v-ti magnetite concentrate with addition of waste according to claim 1, is characterized in that the tumbler index of the agglomerate obtained is 59 ~ 61%, yield rate 77 ~ 80%, cryogenic reducting powder index RDI
+ 3.15be 48 ~ 51%.
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| CN108866323A (en) * | 2018-07-10 | 2018-11-23 | 东北大学 | A kind of method that high-titanium type vanadium-titanium magnetite prepares sinter with addition of common iron ore |
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| CN109943712B (en) * | 2019-04-02 | 2020-10-27 | 青海际华江源实业有限公司 | Chromium mineral powder sintering method and sintering system |
| CN114480836A (en) * | 2021-12-22 | 2022-05-13 | 武钢集团昆明钢铁股份有限公司 | Low-cost sinter of high-proportion vanadium-titanium magnetite concentrate and preparation method thereof |
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| CN114410961A (en) * | 2022-01-17 | 2022-04-29 | 广西中金岭南矿业有限责任公司 | Method for resource utilization of lead-zinc ore waste rocks |
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