CN107841620A - A kind of magnesia iron ore pellets preparation method of low titanium - Google Patents
A kind of magnesia iron ore pellets preparation method of low titanium Download PDFInfo
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- CN107841620A CN107841620A CN201711014389.5A CN201711014389A CN107841620A CN 107841620 A CN107841620 A CN 107841620A CN 201711014389 A CN201711014389 A CN 201711014389A CN 107841620 A CN107841620 A CN 107841620A
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- low titanium
- magnesia
- pelletizing
- ore pellets
- iron ore
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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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
Abstract
The invention discloses a kind of magnesia iron ore pellets preparation method of low titanium, specifically by fine iron breeze, Mg-high andesite and binding agent are made into compound, by high pressure roller mill, drying, mixed again through intensive mixer, compound adds water pelletizing through disc balling machine, the green-ball for meeting granularity requirements is transported to dribble belt by disc balling machine, the qualified green-balls of the 16mm of particle size diameter 9 are separated by Vibration Screen be transported to drying grate be dried and preheat, subsequently into revolution roasting in kilns, high temperature pelletizing is through cooling after roasting, screening removes explosion efflorescence pelletizing, obtain the magnesia iron ore pellets of qualified low titanium.The present invention uses low titanium fine iron breeze, and addition material containing magnesium, common bond can produce dual alkalinity CaO/SiO2≤ 0.5, containing MgO >=2.50%, containing TiO2≤ 2.3% pellet, change the Bf Burden that current blast furnace uses High Level Sinter, blast furnace process can be carried out using cleaner pellet with large scale.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of magnesia iron ore pellets preparation method of low titanium.
Background technology
The steel production capacity in China accounts for the half of world's aggregated capacity, and pellet is consumed close to 200,000,000 tons, in Bf Burden
Accounting is average less than 20%, as a small number of iron and steel enterprise's pellets such as Taiyuan Iron and Steel Co., Shoudu Iron and Steel Co capital Tang smelt ratio close to 30%.Pelletizing work at present
Sequence has the advantages that discharge amount of exhaust gas is low, pollutant discharge amount is few, process consumption is low, fume treatment difficulty is small than sintering circuit,
From environmental protection, the overall situation of energy-saving and emission-reduction we to change the blast furnace process pattern based on sintering deposit at present, progressively mistake
Cross as the blast furnace process pattern based on environment-friendly pelletizing production.But during operation of blast furnace, hearth erosion is inevitable,
In order to improve blast furnace service life, need to add titaniferous material progress furnace retaining in sintering deposit in the process of running, and sintering deposit
Middle TiO2Content rise can cause sinter quality to deteriorate, and can effectively solve problems using low titanium pelletizing.
The magnesia metallurgical properties of low titanium meet blast furnace process demand, and smelting, which can substitute, in blast furnace partially sinters
Ore deposit, yield is improved, reduce fuel consumption, reduce CO2Discharge capacity.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of magnesia iron ore pellets preparation technology of low titanium.Prepared by the present invention
The magnesia iron ore pellets of low titanium can substitute titaniferous sintering deposit and enter stove, can further reduce sintering deposit usage amount, and reduction is produced into
This, further improves pellet and smelts economy.
In order to solve the above technical problems, the present invention adopts the technical scheme that：A kind of magnesia iron ore pellets preparation side of low titanium
Method, the preparation method comprise the following steps：
1）Fine iron breeze mixes；
2）Fine iron breeze, Mg-high andesite and binding agent are made into compound, weight proportion is：Fine iron breeze 94-98.5%, Mg-high andesite
1-3%, binding agent 0.5-3%；
3）Compound is by high pressure roller mill, drying, then is mixed by intensive mixer；
4）The compound of mixing adds water pelletizing through disc balling machine, controls pelletizing moisture and pellet size, meets granularity requirements
Green-ball is transported to dribble belt by disc balling machine；
5）Mixing green-ball passes through vibratory sieve, screens out the qualified green-ball of granularity；
6）Green-ball is transported to drying grate and is dried and preheats after screening, subsequently into being calcined in rotary kiln；
7）High temperature pelletizing enters circular cooler after roasting, is cooled by air, and screening removes explosion efflorescence pelletizing, obtains
The qualified magnesia pelletizing of low titanium.
Step 1 of the present invention）Mix -200 mesh granularity >=65% in fine iron breeze.
Step 1 of the present invention）Mixing fine iron breeze is titaniferous fine iron breeze, in terms of mass fraction, SiO2：3.0-
6.5%、TiO2：1.0-2.5%.
Step 1 of the present invention）Middle fine iron breeze is the mixed mineral powder of low titanium fine iron breeze and high silicon iron fine ore, with matter
Amount is than meter, low titanium fine iron breeze：High silicon iron fine ore=10-40:60-90.
Step 2 of the present invention）Middle Mg-high andesite is containing the higher common magnesia powder of magnesium, wherein MgO >=75%；The step
Rapid 2）Middle binding agent is any one or a few in bentonite, organic binder bond, compound binding agent.
Step 3 of the present invention）It is 5-9% that middle compound, which is dried to moisture,.
Step 4 of the present invention）Middle compound adds water pelletizing through disc balling machine, and amount of water is the 6- of material gross weight
10%。
Step 5 of the present invention）In qualified green-ball particle size diameter be 9-16mm.
Step 6 of the present invention）Middle preheating temperature control is at 900-1100 DEG C；Sintering temperature is controlled at 1200-1300 DEG C,
Roasting time 15-25min.
Step 7 of the present invention）High temperature pelletizing is cooled into central cooler by air, is cooled to temperature≤100
℃；The step 7）In the magnesia pelletizing dual alkalinity CaO/SiO of qualified low titanium2≤ 0.5, MgO >=2.50%, TiO2≤2.3%。
Low titanium fine iron breeze of the present invention, in terms of mass fraction, SiO2：2.0-6.5%, TiO2：1.0-8.0%；The height
Ferrosilicon fine ore, in terms of mass fraction, SiO2：3.5-8.0%, TiO2：0.01-1.0%.
Green-ball and finished ball detection method of the present invention is specific as follows according to national standard and industry universal method：
1st, greenball properties detection method
(1) shatter strength of green pellet determines：10.0~12.5mm of diameter green-balls 20 are taken, are freely fallen from 500mm eminences thick in 10mm
On steel plate, record each ball does not rupture number, takes the arithmetic mean of instantaneous value for falling total degree of 20 balls to refer to as drop strength
Mark (a secondary/ball).
(2) compression strength of green pel let determines：10.0~12.5mm of diameter green-balls 20 are taken, in each ball of pressure aircraft measurements
Compression strength, the arithmetic mean of instantaneous value of compression strength of 20 balls is taken as compression strength index (N/ ball).
(3) cracking temperature of green pel let is determined with " cracking temperature of green pel let measure device ", is by standard state air rate adjustment during air first
1.8m/s, heating furnace is then preheating to predetermined temperature, is reloaded into 50 green-balls, then by the hot blast of certain temperature from the bottom up
Blow on green-ball, 5min when blowing.Estimate pelletizing whether there is explosion after taking-up, the temperature when pelletizing number for producing explosion is 4% (2)
Degree is burst temperature.
2nd, finished ball nodulizing compressive strength determination method, pelletizing compression strength is according to " iron ore pellets compressive strength determination side
Method " (GB/T14201-1993) is measured.
3rd, metallurgical properties assay method
(1) low-temperature reduction disintegration can determine：According to " the static side that cold rotary drum is used after reducing is tested in the efflorescence of iron ore low temperature
Method " (GB/T13242-91) is measured.
(2) pellet ore reduction performance measurement：Enter according to " assay method of reducibility of iron ore " (GB/T13241-1991)
Row measure.
(3) loading softening performance determines：In temperature-rise period, the temperature when stock column high shrinkage 10% starts for softening
Temperature (T10%), temperature when shrinking 40% is softening finishing temperature (T40%), Δ T=T40%- T10%For softening temperature section.Sample
Granularity is 2~3mm, loading 1kg/cm2, stock column is highly 40mm.
(4) pellet ore reduction swellability：According to " assay method of the iron ore pellets with respect to free-swelling index " (GB/T13240-
91) it is measured.
It is using beneficial effect caused by above-mentioned technical proposal：1st, in abandoning tradition sintering production of the present invention with addition of containing
TiO2Material causes sinter quality to decline, and changes the Bf Burden that current blast furnace uses High Level Sinter, Ke Yi great
Ratio carries out blast furnace process using cleaner pellet.2nd, the present invention is smart with addition of ferrotianium is inexpensively contained using common fine iron breeze
Miberal powder carries out pelletizing, and its -200 mesh granularity reaches more than 65%.3rd, the present invention is qualified using common bond addition Mg-high andesite production
The magnesia pelletizing dual alkalinity CaO/SiO of low titanium2≤ 0.5, containing MgO >=2.50%, containing TiO2≤ 2.3%, its metallurgical performance is better than high silicon
Acid pellet.4th, the compound national standard of pellet raw ball intensity prepared by the inventive method：Compression strength >=10N/P, fall by force
Degree >=5 times, anti-burst temperature >=450 DEG C；Pelletizing crushing strength is more than 2300N/ after roasting.
Brief description of the drawings
Fig. 1 is the magnesia iron ore pellets preparation technology flow chart of low titanium of the present invention.
Embodiment
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The magnesia iron ore pellets preparation method method of the present embodiment low titanium comprises the following steps：
1）Low titanium fine iron breeze presses 10 with high silicon iron fine ore:90 mixing, it is 65% to mix -200 mesh granularities in fine iron breeze；
Mixing fine iron breeze is titaniferous fine iron breeze, in terms of mass fraction, SiO2：3.0%、TiO2：1.0%；
2）Mixing fine iron breeze, Mg-high andesite, bentonite are made into compound, weight proportion is：Fine iron breeze 95%, Mg-high andesite 2%,
Binding agent 3%；Mg-high andesite is containing the higher common magnesia powder of magnesium, wherein MgO：75%；
3）It is 6% that compound, which passes through high pressure roller mill, is dried to moisture, then is mixed by intensive mixer；
4）The compound of mixing adds water pelletizing through disc balling machine, and amount of water is the 8% of material gross weight, by vibratory sieve, screening
Go out granularity 9-16mm qualified green-ball；
5）Qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature is controlled at 900 DEG C, subsequently into rotary kiln
It is calcined, sintering temperature control is at 1210 DEG C, roasting time 25min；
6）High temperature pelletizing is cooled to 95 DEG C into central cooler by air after roasting, and screening removes explosion efflorescence pelletizing, obtains
To the magnesia iron ore pellets of qualified low titanium.
The magnesia iron ore pellets dual alkalinity CaO/SiO of the qualified low titanium of the present embodiment2For 0.5, containing MgO：2.8%, containing TiO2：
0.13%。
Pelletizing reproducibility and low-temperature reduction disintegration can be shown in Table 1；
Pelletizing softening melt-dropping property is shown in Table 2.
Embodiment 2
The magnesia iron ore pellets preparation method method of the present embodiment low titanium comprises the following steps：
1）Low titanium fine iron breeze presses 40 with high silicon iron fine ore:60 mixing, it is 68% to mix -200 mesh granularities in fine iron breeze；
Mixing fine iron breeze is titaniferous fine iron breeze, in terms of mass fraction, SiO2：3.54%、TiO2：1.20%；
2）Mixing fine iron breeze, Mg-high andesite, compound binding agent are made into compound, weight proportion is：Fine iron breeze 98%, Gao Mei
Powder 1.5%, binding agent 0.5%；Mg-high andesite is containing the higher common magnesia powder of magnesium, wherein MgO：80%；
3）It is 8% that compound, which passes through high pressure roller mill, is dried to moisture, then is mixed by intensive mixer；
4）The compound of mixing adds water pelletizing through disc balling machine, and amount of water is the 9% of material total amount, by vibratory sieve, is screened out
The qualified green-balls of granularity 9-16mm；
5）Qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature is controlled at 1100 DEG C, subsequently into rotary kiln
In be calcined, sintering temperature control is at 1250 DEG C, roasting time 15min；
6）High temperature pelletizing is cooled to 90 DEG C into central cooler by air after roasting, and screening removes explosion efflorescence pelletizing, obtains
To the magnesia iron ore pellets of qualified low titanium.
The magnesia iron ore pellets dual alkalinity CaO/SiO of the qualified low titanium of the present embodiment2For 0.4, containing MgO：2.6%, containing TiO2：
1.20%。
Pelletizing reproducibility and low-temperature reduction disintegration can be shown in Table 1；
Pelletizing softening melt-dropping property is shown in Table 2.
Embodiment 3
The magnesia iron ore pellets preparation method method of the present embodiment low titanium comprises the following steps：
1）Low titanium fine iron breeze presses 20 with high silicon iron fine ore:80 mixing, it is 70% to mix -200 mesh granularities in fine iron breeze；
Mixing fine iron breeze is titaniferous fine iron breeze, in terms of mass fraction, SiO2：4.59%、TiO2：1.60%；
2）Mixing fine iron breeze, Mg-high andesite, bentonite are made into compound, weight proportion is：Fine iron breeze 97%, Mg-high andesite 1%,
Binding agent 2%；Mg-high andesite is containing the higher common magnesia powder of magnesium, wherein MgO：77%；
3）It is 5% that compound, which passes through high pressure roller mill, is dried to moisture, then is mixed by intensive mixer；
4）The compound of mixing adds water pelletizing through disc balling machine, and amount of water is the 6% of material total amount, by vibratory sieve, is screened out
The qualified green-balls of granularity 9-16mm；
5）Qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature is controlled at 1000 DEG C, subsequently into rotary kiln
In be calcined, sintering temperature control is at 1230 DEG C, roasting time 20min；
6）High temperature pelletizing is cooled to 95 DEG C into central cooler by air after roasting, and screening removes explosion efflorescence pelletizing, obtains
To the magnesia iron ore pellets of qualified low titanium.
The magnesia iron ore pellets dual alkalinity CaO/SiO of the qualified low titanium of the present embodiment2For 0.3, containing MgO：3.0%, containing TiO2：
1.60%。
Pelletizing reproducibility and low-temperature reduction disintegration can be shown in Table 1；
Pelletizing softening melt-dropping property is shown in Table 2.
Embodiment 4
The magnesia iron ore pellets preparation method method of the present embodiment low titanium comprises the following steps：
1）Low titanium fine iron breeze presses 30 with high silicon iron fine ore:70 mixing, it is 70% to mix -200 mesh granularities in fine iron breeze；
Mixing fine iron breeze is titaniferous fine iron breeze, in terms of mass fraction, SiO2：5.73%、TiO2：2.20%；
2）Mixing fine iron breeze, Mg-high andesite, compound binding agent are made into compound, weight proportion is：Fine iron breeze 98.5% is high
Magnesium powder 1%, binding agent 0.5%；Mg-high andesite is containing the higher common magnesia powder of magnesium, wherein MgO：78%；
3）It is 9% that compound, which passes through high pressure roller mill, is dried to moisture, then is mixed by intensive mixer；
4）The compound of mixing adds water pelletizing through disc balling machine, and amount of water is the 10% of material total amount, by vibratory sieve, screening
Go out the qualified green-balls of granularity 9-16mm；
5）Qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature is controlled at 1050 DEG C, subsequently into rotary kiln
In be calcined, sintering temperature control is at 1300 DEG C, roasting time 22min；
6）High temperature pelletizing is cooled 95 DEG C into central cooler by air after roasting, and screening removes explosion efflorescence pelletizing, obtains
The qualified magnesia iron ore pellets of low titanium.
The magnesia iron ore pellets dual alkalinity CaO/SiO of the qualified low titanium of the present embodiment2For 0.2, containing MgO：3.5%, containing TiO2：
2.0%。
Pelletizing reproducibility and low-temperature reduction disintegration can be shown in Table 1；
Pelletizing softening melt-dropping property is shown in Table 2.
Embodiment 5
The magnesia iron ore pellets preparation method method of the present embodiment low titanium comprises the following steps：
1）Low titanium fine iron breeze presses 35 with high silicon iron fine ore:65 mixing, it is 75% to mix -200 mesh granularities in fine iron breeze；
Mixing fine iron breeze is titaniferous fine iron breeze, in terms of mass fraction, SiO2：6.5%、TiO2：2.5%；
2）Mixing fine iron breeze, Mg-high andesite, organic binder bond are made into compound, weight proportion is：Fine iron breeze 94%, Gao Mei
Powder 3%, binding agent 3%；Mg-high andesite is containing the higher common magnesia powder of magnesium, wherein MgO：79%；
3）It is 7% that compound, which passes through high pressure roller mill, is dried to moisture, then is mixed by intensive mixer；
4）The compound of mixing adds water pelletizing through disc balling machine, and amount of water is the 9% of material total amount, by vibratory sieve, is screened out
The qualified green-balls of particle size diameter 9-16mm；
5）Qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature is controlled at 1080 DEG C, subsequently into rotary kiln
In be calcined, sintering temperature control is at 1200 DEG C, roasting time 23min；
6）High temperature pelletizing is cooled to 100 DEG C into central cooler by air after roasting, and screening removes explosion efflorescence pelletizing, obtains
To the magnesia iron ore pellets of qualified low titanium.
The magnesia iron ore pellets dual alkalinity CaO/SiO of the qualified low titanium of the present embodiment2For 0.25, containing MgO：2.5%, containing TiO2：
2.30%。
Pelletizing reproducibility and low-temperature reduction disintegration can be shown in Table 1；Pelletizing softening melt-dropping property is shown in Table 2.
The iron ore pellets prepared using this method are pellet, the compound national standard of its green ball strength：Compression strength >=
10N/P, drop strength >=5 time, anti-burst temperature >=450 DEG C；Pelletizing crushing strength is more than 2300N/ after roasting, its low temperature
Reduction degradation index is better than acidic pellet ore, and reproducibility increases than existing acidic pellet ore, and its performance is shown in Table 1.
The pelletizing reproducibility of table 1 and low-temperature reduction disintegration can contrast
Its softening of pellet prepared by the present invention and droplet temperature are higher than existing acidic pellet ore, are approached with high basicity sinter,
Soft heat bandwidth section can substantially be reduced by being smelted in blast furnace, reduce the blast furnace melting with soft pressure loss, improve blast furnace permeability,
Be advantageous to blast furnace process demand, its performance is shown in Table 2.
The softening melt-dropping property contrast of the pelletizing of table 2
Above example is only to illustrative and not limiting technical scheme, although entering with reference to above-described embodiment to the present invention
Go detailed description, it will be understood by those within the art that：Still the present invention can be modified or equally replaced
Change, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover will in right of the invention
Ask among scope.
Claims (10)
- A kind of 1. magnesia iron ore pellets preparation method of low titanium, it is characterised in that：The preparation method comprises the following steps：1）Fine iron breeze mixes；2）Fine iron breeze, Mg-high andesite and binding agent are made into compound, weight proportion is：Fine iron breeze 94-98.5%, Mg-high andesite 1-3%, binding agent 0.5-3%；3）Compound is by high pressure roller mill, drying, then is mixed by intensive mixer；4）The compound of mixing adds water pelletizing through disc balling machine, controls pelletizing moisture and pellet size, meets granularity requirements Green-ball is transported to dribble belt by disc balling machine；5）Mixing green-ball passes through vibratory sieve, screens out the qualified green-ball of granularity；6）Green-ball is transported to drying grate and is dried and preheats after screening, subsequently into being calcined in rotary kiln；7）High temperature pelletizing enters circular cooler after roasting, is cooled by air, and screening removes explosion efflorescence pelletizing, obtains The qualified magnesia pelletizing of low titanium.
- A kind of 2. magnesia iron ore pellets preparation method of low titanium according to claim 1, it is characterised in that the step 1）It is mixed Close -200 mesh granularity >=65% in fine iron breeze.
- A kind of 3. magnesia iron ore pellets preparation method of low titanium according to claim 1, it is characterised in that the step 1）In Fine iron breeze is titaniferous fine iron breeze, in terms of mass fraction, SiO2：3.0-6.5%、TiO2：1.0-2.5%.
- A kind of 4. magnesia iron ore pellets preparation method of low titanium according to claim 1, it is characterised in that the step 1）In Fine iron breeze is the mixed mineral powder of low titanium fine iron breeze and high silicon iron fine ore, by quality ratio, low titanium fine iron breeze：High silicon iron Fine ore=10-40:60-90.
- A kind of 5. magnesia iron ore pellets preparation method of low titanium according to claim 1-4 any one, it is characterised in that institute State step 2）Middle Mg-high andesite is containing the higher common magnesia powder of magnesium, wherein MgO >=75%；The step 2）Middle binding agent is swollen Moisten any one or a few in soil, organic binder bond, compound binding agent.
- A kind of 6. magnesia iron ore pellets preparation method of low titanium according to claim 1-4 any one, it is characterised in that institute State step 3）It is 5-9% that middle compound, which is dried to moisture,.
- A kind of 7. magnesia iron ore pellets preparation method of low titanium according to claim 1-4 any one, it is characterised in that institute State step 4）Middle compound adds water pelletizing through disc balling machine, and amount of water is the 6-10% of material gross weight.
- A kind of 8. magnesia iron ore pellets preparation method of low titanium according to claim 1-4 any one, it is characterised in that institute State step 5）In qualified green-ball particle size diameter be 9-16mm.
- A kind of 9. magnesia iron ore pellets preparation method of low titanium according to claim 1-4 any one, it is characterised in that institute State step 6）Middle preheating temperature control is at 900-1100 DEG C；Sintering temperature control is at 1200-1300 DEG C, roasting time 15- 25min。
- A kind of 10. magnesia iron ore pellets preparation method of low titanium according to claim 1-4 any one, it is characterised in that The step 7）High temperature pelletizing is cooled into central cooler by air, is cooled to temperature≤100 DEG C；The step 7）In The magnesia pelletizing dual alkalinity CaO/SiO of qualified low titanium2≤ 0.5, MgO >=2.50%, TiO2≤2.3%。
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| CN108680003A (en) * | 2018-05-31 | 2018-10-19 | 中钢集团吉林机电设备有限公司 | A kind of ferrochrome pellet roasting rectangle shaft furnace and its method of roasting |
| CN112159896A (en) * | 2020-09-27 | 2021-01-01 | 酒泉钢铁(集团)有限责任公司 | High-magnesium internal combustion acid pellet ore |
| CN114196822A (en) * | 2021-12-03 | 2022-03-18 | 河南锦瀚环保科技有限公司 | Novel adhesive for disk pelletizing sintered pellet ore and preparation method thereof |
| CN114763582A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Method for producing magnesium pellets by using oriented silicon steel magnesium oxide waste |
| CN115198087A (en) * | 2022-06-23 | 2022-10-18 | 华北理工大学 | Method for inhibiting ring formation of high-silicon magnesium fluxed pellet rotary kiln |
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| CN114763582A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Method for producing magnesium pellets by using oriented silicon steel magnesium oxide waste |
| CN114763582B (en) * | 2021-01-15 | 2023-09-12 | 宝山钢铁股份有限公司 | Method for producing magnesium pellets by using oriented silicon steel magnesia waste |
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