CN106119524A - A kind of low silicon height magnesioferrite pelletizing preparation method - Google Patents
A kind of low silicon height magnesioferrite pelletizing preparation method Download PDFInfo
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- CN106119524A CN106119524A CN201610631771.XA CN201610631771A CN106119524A CN 106119524 A CN106119524 A CN 106119524A CN 201610631771 A CN201610631771 A CN 201610631771A CN 106119524 A CN106119524 A CN 106119524A
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- pelletizing
- magnesioferrite
- low silicon
- fine
- low
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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
-
- 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
- C22B1/26—Cooling of roasted, sintered, or agglomerated ores
Abstract
The present invention relates to a kind of low silicon height magnesioferrite pelletizing preparation method, belong to metallurgical technology field, concrete grammar is for obtaining fine iron breeze by iron ore concentrate pulverizing, fine grinding, it is desirable to 200 mesh fineness >=65%；Fine iron breeze and binding agent are made into compound, through high pressure roller mill, drying, then mix through intensive mixer；Compound adds water pelletizing through disc balling machine, through vibrosieve, screens out the granularity 9 qualified green-ball of 15mm；Being transported to drying grate be dried and preheat, subsequently into carrying out roasting in rotary kiln, after roasting, high temperature pelletizing cools, and screening removes explosion efflorescence pelletizing, obtains qualified low silicon magnesium-rich pellet group.The present invention uses low silicon height magnesium fine iron breeze, without containing magnesium material, only uses common bond can produce ternary basicity >=1.5, containing MgO >=3.30%, containing SiO2The pellet of≤3.5%.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to a kind of low silicon height magnesioferrite pelletizing preparation method.
Background technology
The iron and steel production capacity of China accounts for the 50% of world's aggregated capacity, and pellet consumption is close to 200,000,000 tons, in Bf Burden
Accounting is average less than 20%, as Taiyuan Iron and Steel Co., Shoudu Iron and Steel Co Jing Tangdeng minority iron and steel enterprise pellet smelt ratio close to 30%.Pelletizing work at present
Sequence is lower than sintering circuit discharge amount of exhaust gas, pollutant discharge amount is few, operation consumes the advantages such as low, fume treatment difficulty is little, but ball
Nodulizing crude fuel cost high and low magnesium acid pellet softening temperature is low, the interval width of soft heat becomes restriction blast furnace and proposes a high proportion of restriction
Sexual factor.The western countries such as American-European in order to reduce the environmental pollution of sintering production process, gradually reduce or close sintering machine and with
It is main that pellet is smelted.Therefore, from protection environment, energy-saving and emission-reduction overall situation we to change at present based on sintering deposit
State of Blast Furnace smelts pattern, progressively transition be eco-friendly pelletizing production be main blast furnace process pattern.
The Iron Ore Powder resource of China be based on lean ore final election after iron ore concentrate, granularity is more carefully suitable to pelletizing.Pelletizing at present
Iron concentrate price is high, and high silicon low magnesium pelletizing is unsuitable for vast scale and smelts, pellet reflowing temperature interval width, and high stove pellet ore is smelted
Uneconomical.
Low silicon magnesium-rich pellet group metallurgical performance is excellent, smelts and can reduce slag ratio, reduce fuel consumption, reduce in blast furnace
CO2 discharge capacity, it is possible to improve the economy that pellet is smelted further.
Summary of the invention
It is an object of the invention to provide a kind of low silicon height magnesioferrite pellet preparation technology, be a kind of without molten containing magnesium
Agent, calcium-magnesium powder or other solid waste material in magnesium improve the pelletizing preparation method of pelletizing content of MgO, can reduce further and produce into
This, improve the economic benefit that pellet is smelted.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that a kind of low silicon height magnesioferrite pelletizing preparation side
Method, described preparation method is as follows:
1) iron ore concentrate mixing, fine grinding obtain fine iron breeze；
2) fine iron breeze and binding agent being made into compound, weight proportion is: fine iron breeze 97%-99.5%, binding agent 0.5%-
3%；
3) compound is through high pressure roller mill, drying, then mixes through intensive mixer；
4) compound adds water pelletizing through disc balling machine, through vibrosieve, screens out qualified green-ball；
5) qualified green-ball is transported to drying grate and is dried and preheats, subsequently into carrying out roasting in rotary kiln；
6) after roasting, high temperature pelletizing entrance central cooler is cooled by air, and screening removes explosion efflorescence pelletizing, and it is qualified to obtain
Low silicon magnesium-rich pellet group.
-200 mesh granularity >=65% of step 1) fine iron breeze of the present invention.
Step 1) fine iron breeze of the present invention is containing Mg low-Si fine iron breeze, in terms of mass fraction, Si:0.5%-4.5%,
Magnesium: 0.5%-3.8%.
In step 1) of the present invention, fine iron breeze is the mixed mineral powder containing Mg low-Si fine iron breeze Yu high silicon iron fine ore,
Mass ratio is containing Mg low-Si fine iron breeze: high silicon iron fine ore=60-90:40-10.
Of the present invention containing Mg low-Si fine iron breeze, in terms of mass fraction, Si:0.5%-4.5%, magnesium: 0.5%-3.8%；Institute
State high silicon iron fine ore, in terms of mass fraction, Si:3.5%-8%, magnesium: 0.01%-2%.
Step 2 of the present invention) in binding agent be in bentonite, organic binder bond, compound binding agent any one or
Several.
In step 3) of the present invention, compound drying is 5%-9% to moisture；In described step 4), compound is through circle
Dish pelletizer adds water pelletizing, and amount of water is the 6%-10% of material total amount；Qualified green-ball granularity is 9-15mm.
Step 5) of the present invention preheating temperature controls at 900-1100 DEG C；Sintering temperature controls at 1210-1330 DEG C, roasting
15-25 minute burning time.
In step 6) of the present invention, high temperature pelletizing entrance central cooler is cooled by air, is cooled to temperature≤100
℃。
Qualified low silicon magnesium-rich pellet group ternary basicity >=1.5 in step 6) of the present invention, containing MgO >=3.30%, containing SiO2
≤3.5%。
Green-ball of the present invention and finished ball detection method are according to national standard and industry universal method, specific as follows:
1, greenball properties detection method
(1) shatter strength of green pellet measures: cut-off footpath 10.0 ~ 12.5mm green-ball 20, freely falls at 10mm thickness steel from 500mm eminence
On plate, record each ball does not ruptures number of times, takes the arithmetic mean of instantaneous value falling total degree of 20 balls as drop strength index
(a secondary/ball).
(2) compression strength of green pel let measures: cut-off footpath 10.0 ~ 12.5mm green-ball 20, at each ball of pressure aircraft measurements
Comprcssive strength, takes the arithmetic mean of instantaneous value of comprcssive strength of 20 balls as comprcssive strength index (N/ ball).
(3) cracking temperature of green pel let measures with " cracking temperature of green pel let determinator ", by air markers state air rate adjustment is first
1.8m/s, is then preheating to predetermined temperature by heating furnace, reinstalls 50 green-balls, then by the hot blast of uniform temperature from the bottom up
Blow on green-ball, when blowing 5 minutes.After taking-up, range estimation pelletizing is with or without explosion, and the pelletizing number producing explosion is temperature time 4% (2)
Degree is burst temperature.
2, finished ball nodulizing compressive strength determination method, pelletizing comprcssive strength is according to " iron ore pellets compressive strength determination side
Method " (GB/T14201-1993) be measured.
3, metallurgical properties assay method
(1) low-temperature reduction disintegration can measure: according to " using the side of cold rotary drum after iron ore low temperature efflorescence experiment static state reduction
Method " (GB/T13242-91) be measured.
(2) pellet ore reduction performance measurement: enter according to " assay method of reducibility of iron ore " (GB/T13241-1991)
Row measures.
(3) loading softening performance measures: in temperature-rise period, the temperature when stock column high shrinkage 10% is that softening starts
Temperature (T10%), temperature when shrinking 40% is for softening finishing temperature (T40%), Δ T=T40%-T10%Interval for softening temperature.Sample
Granularity is 2～3mm, and loading is 1kg/cm2, stock column height is 40mm.
(4) pellet ore reduction swellability: according to " iron ore pellets is relative to the assay method of free-swelling index " (GB/T13240-
91) it is measured.
Use having the beneficial effects that of technique scheme: 1, abandoning tradition magnesium-rich pellet group manufacture method needs to add in vain
Marble dust, high calcium magnesium powder, the method that improves content of MgO containing magnesium solid waste material etc., reduce containing magnesium or calcic material when pyrolytic
Expansion efflorescence destruction to pelletizing, improves pelletizing production efficiency, reduces the waste containing magnesium resource.2, will originally be unsuitable for making
The low silicon height magnesioferrite powder of ball is for pelletizing after fine grinding or gravity treatment, and its-200 mesh reaches more than 65%.3, common gluing only is used
Knot agent can produce ternary basicity >=1.5, containing MgO >=3.30%, containing SiO2The pellet of≤3.5%, its metallurgical performance is better than height
Silicon acid pellet.4, its green ball strength of pellet of preparing of this method is used to be combined national standard: comprcssive strength >=10N/P, to fall
Lower intensity >=5 time, anti-burst temperature >=450 DEG C；After roasting, pelletizing crushing strength is more than 2300N/.
Accompanying drawing explanation
Fig. 1 is preparation technology flow chart of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further details.
Embodiment 1
1) fine iron breeze, fine iron breeze are obtained containing Mg low-Si fine iron breeze (in terms of mass fraction, Si:2.7%, magnesium: 1.6%) fine grinding
-200 mesh granularities be 65%；
Step 1) fine iron breeze is containing Mg low-Si fine iron breeze, in terms of mass fraction, Si:0.5%-4.5%, magnesium: 0.5%-3.8%.
2) fine iron breeze and binding agent bentonite being made into compound, weight proportion is: fine iron breeze 97%, binding agent 3%；
3) compound through high pressure roller mill, dry to moisture be 6%, then through intensive mixer mix；
4) compound adds water pelletizing through disc balling machine, and amount of water is the 8% of material total amount, through vibrosieve, screens out granularity 9-
The qualified green-ball of 15mm；
5) qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature controls at 900 DEG C, subsequently in rotary kiln
Carrying out roasting, sintering temperature controls at 1210 DEG C, roasting time 25 minutes；
6) after roasting, high temperature pelletizing entrance central cooler is cooled to temperature 95 DEG C by air, and screening removes explosion efflorescence ball
Group, obtains qualified low silicon magnesium-rich pellet group.
Qualified low silicon magnesium-rich pellet group ternary basicity 1.5, containing MgO:3.30%, containing SiO2: 3.0%.
Embodiment 2
1) fine iron breeze, fine iron breeze are obtained containing Mg low-Si fine iron breeze (in terms of mass fraction, Si:2.9%, magnesium: 1.9%) fine grinding
-200 mesh granularities be 68%；
2) by 99.5:0.5, fine iron breeze and compound binding agent being made into compound, weight proportion is: fine iron breeze 99.5%, viscous
Knot agent 0.5%；
3) compound through high pressure roller mill, dry to moisture be 8%, then through intensive mixer mix；
4) compound adds water pelletizing through disc balling machine, and amount of water is the 9% of material total amount, through vibrosieve, screens out granularity 9-
The qualified green-ball of 15mm；
5) qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature controls at 1100 DEG C, subsequently into rotary kiln
In carry out roasting, sintering temperature controls at 1330 DEG C, roasting time 15 minutes；
6) after roasting, high temperature pelletizing entrance central cooler is cooled to temperature 90 DEG C by air, and screening removes explosion efflorescence ball
Group, obtains qualified low silicon magnesium-rich pellet group.
Qualified low silicon magnesium-rich pellet group ternary basicity 2, containing MgO:3.50%, containing SiO2: 3.5%.
Embodiment 3
1) containing Mg low-Si fine iron breeze (in terms of mass fraction, Si:0.5%, magnesium: 3.8%) with high silicon iron fine ore (with mass fraction
Meter, Si:3.5%, magnesium: 0.01%) mixing uses high-pressure roller mill Iron Ore Powder to carry out fine grinding to obtain mixing fine iron breeze, mix Haematite
-200 mesh granularities of breeze are 75%；Containing Mg low-Si fine iron breeze: high silicon iron fine ore=60:40
2) mixing fine iron breeze and binding agent bentonite 98:2 being made into compound, weight proportion is: fine iron breeze 98%, bonding
Agent 2%；
3) compound through high pressure roller mill, dry to moisture be 9%, then through intensive mixer mix；
4) compound adds water pelletizing through disc balling machine, and amount of water is the 6% of material total amount, through vibrosieve, screens out granularity 9-
The qualified green-ball of 15mm；
5) qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature controls at 1000 DEG C, subsequently into rotary kiln
In carry out roasting, sintering temperature controls at 1300 DEG C, roasting time 20 minutes；
6) after roasting, high temperature pelletizing entrance central cooler is cooled to temperature 100 DEG C by air, and screening removes explosion efflorescence ball
Group, obtains qualified low silicon magnesium-rich pellet group.
Qualified low silicon magnesium-rich pellet group ternary basicity 2.5, containing MgO:4.00%, containing SiO2: 2.8%.
Embodiment 4
1) containing Mg low-Si fine iron breeze (in terms of mass fraction, Si:4.5%, magnesium: 0.5%) with high silicon iron fine ore (with mass fraction
Meter, Si:8%, magnesium: 2%) mixing uses high-pressure roller mill Iron Ore Powder to carry out fine grinding to obtain mixing fine iron breeze, mix fine iron breeze
-200 mesh granularities be 75%；Wherein the ratio containing Mg low-Si fine iron breeze and high silicon iron fine ore mixing quality is for 90:10；
2) mixing fine iron breeze and compound binding agent 99.5:0.5 being made into compound, weight proportion is: fine iron breeze 99.5%,
Compound binding agent 0.5%；
3) compound through high pressure roller mill, dry to moisture be 5%, then through intensive mixer mix；
4) compound adds water pelletizing through disc balling machine, and amount of water is the 10% of material total amount, through vibrosieve, screens out granularity
The qualified green-ball of 9-15mm；
5) qualified green-ball is transported to drying grate and is dried and preheats, and preheating temperature controls at 1050 DEG C, subsequently into rotary kiln
In carry out roasting, sintering temperature controls at 1290 DEG C, roasting time 22 minutes；
6) after roasting, high temperature pelletizing entrance central cooler is cooled to temperature 97 DEG C by air, and screening removes explosion efflorescence ball
Group, obtains qualified low silicon magnesium-rich pellet group.
Qualified low silicon magnesium-rich pellet group ternary basicity 2.0, containing MgO:3.80%, containing SiO2: 3.2%.
Using the iron ore pellets i.e. pellet prepared of this method, its green ball strength is combined national standard: comprcssive strength >=
10N/P, drop strength >=5 time, anti-burst temperature >=450 DEG C；After roasting, pelletizing crushing strength is more than 2300N/, its low temperature
Reduction degradation index is better than acid pellet and high basicity sinter index, and reproducibility maintains an equal level with existing acidic pellet ore, the lowest
Temperature metallurgical performance such as table 1.
Table 1 pelletizing reproducibility 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, close with high basicity sinter,
Smelt in blast furnace and can substantially reduce cohesive zone width interval, reduce the blast furnace melting with soft pressure loss, improve blast furnace permeability,
Be conducive to blast furnace process demand, its performance such as table 2:
Table 2 pelletizing softens melt-dropping property contrast
Above example is only in order to illustrative not limiting technical scheme, although entering the present invention with reference to above-described embodiment
Go detailed description, it will be understood by those within the art that: still the present invention can be modified or be equal to and replace
Changing, any modification or partial replacement without departing from the spirit and scope of the present invention, its right that all should contain in the present invention is wanted
Ask in the middle of scope.
Claims (10)
1. one kind low silicon height magnesioferrite pelletizing preparation method, it is characterised in that: described preparation method is as follows:
1) fine iron breeze mixing, fine grinding obtain fine iron breeze；
2) fine iron breeze and binding agent being made into compound, weight proportion is: fine iron breeze 97%-99.5%, binding agent 0.5%-
3%；
3) compound is through high pressure roller mill, drying, then mixes through intensive mixer；
4) compound adds water pelletizing through disc balling machine, through vibrosieve, screens out qualified green-ball；
5) qualified green-ball is transported to drying grate and is dried and preheats, subsequently into carrying out roasting in rotary kiln；
6) after roasting, high temperature pelletizing entrance central cooler is cooled by air, and screening removes explosion efflorescence pelletizing, and it is qualified to obtain
Low silicon magnesium-rich pellet group.
One the most according to claim 1 low silicon height magnesioferrite pelletizing preparation method, it is characterised in that: described step 1) ferrum
-200 mesh granularity >=65% of fine ore.
One the most according to claim 1 low silicon height magnesioferrite pelletizing preparation method, it is characterised in that: described step 1) ferrum
Fine ore is containing Mg low-Si fine iron breeze, in terms of mass fraction, Si:0.5%-4.5%, magnesium: 0.5%-3.8%.
One the most according to claim 1 low silicon height magnesioferrite pelletizing preparation method, it is characterised in that: in described step 1)
Fine iron breeze is the mixed mineral powder containing Mg low-Si fine iron breeze Yu high silicon iron fine ore, and mass ratio is containing Mg low-Si fine iron breeze:
High silicon iron fine ore=60-90:40-10.
One the most according to claim 4 low silicon height magnesioferrite pelletizing preparation method, it is characterised in that: described containing Mg low-Si
Fine iron breeze, in terms of mass fraction, Si:0.5%-4.5%, magnesium: 0.5%-3.8%；Described high silicon iron fine ore, with mass fraction
Meter, Si:3.5%-8%, magnesium: 0.01%-2%.
6. according to the one low silicon height magnesioferrite pelletizing preparation method described in claim 1-5 any one, it is characterised in that: institute
State step 2) in binding agent be any one or a few in bentonite, organic binder bond, compound binding agent.
7. according to the one low silicon height magnesioferrite pelletizing preparation method described in claim 1-5 any one, it is characterised in that: institute
Stating compound drying in step 3) is 5%-9% to moisture；In described step 4), compound adds water pelletizing through disc balling machine,
Amount of water is the 6%-10% of material total amount；Qualified green-ball granularity is 9-15mm.
8. according to the one low silicon height magnesioferrite pelletizing preparation method described in claim 1-5 any one, it is characterised in that: institute
State step 5) preheating temperature to control at 900-1100 DEG C；Sintering temperature controls at 1210-1330 DEG C, roasting time 15-25 minute.
9. according to the one low silicon height magnesioferrite pelletizing preparation method described in claim 1-5 any one, it is characterised in that: institute
State high temperature pelletizing entrance central cooler in step 6) to be cooled by air, be cooled to temperature≤100 DEG C.
10. according to the one low silicon height magnesioferrite pelletizing preparation method described in claim 1-5 any one, it is characterised in that:
Qualified low silicon magnesium-rich pellet group ternary basicity >=1.5 in described step 6), containing MgO >=3.30%, containing SiO2≤3.5%。
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106702148A (en) * | 2016-12-11 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Disc type pelletizer provided with screening device |
| CN107488784A (en) * | 2017-09-06 | 2017-12-19 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN107841620A (en) * | 2017-10-25 | 2018-03-27 | 河钢股份有限公司 | A kind of magnesia iron ore pellets preparation method of low titanium |
| CN107937716A (en) * | 2017-11-02 | 2018-04-20 | 安阳钢铁股份有限公司 | A kind of iron ore pellets raw materials for production preparation method for being conducive to efficient pelletizing |
| CN108866325A (en) * | 2017-07-14 | 2018-11-23 | 淮北益嘉益新材料科技有限公司 | A method of improving magnesian flux bursting temperature of pellet ores |
| CN110616313A (en) * | 2019-07-10 | 2019-12-27 | 李秀琴 | Method for preparing raw materials for producing sintered ore and pellet ore and crushing and mixing machine |
| CN110787724A (en) * | 2019-12-03 | 2020-02-14 | 四川致远锂业有限公司 | Fine lithium ore granulation process and granulator |
| 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 |
| CN114891999A (en) * | 2022-05-16 | 2022-08-12 | 唐山钢铁集团有限责任公司 | Ore blending method for producing alkaline pellets by belt type roasting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702148A (en) * | 2016-12-11 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Disc type pelletizer provided with screening device |
| CN108866325A (en) * | 2017-07-14 | 2018-11-23 | 淮北益嘉益新材料科技有限公司 | A method of improving magnesian flux bursting temperature of pellet ores |
| CN107488784A (en) * | 2017-09-06 | 2017-12-19 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN107488784B (en) * | 2017-09-06 | 2019-07-26 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN107841620A (en) * | 2017-10-25 | 2018-03-27 | 河钢股份有限公司 | A kind of magnesia iron ore pellets preparation method of low titanium |
| CN107937716A (en) * | 2017-11-02 | 2018-04-20 | 安阳钢铁股份有限公司 | A kind of iron ore pellets raw materials for production preparation method for being conducive to efficient pelletizing |
| CN110616313A (en) * | 2019-07-10 | 2019-12-27 | 李秀琴 | Method for preparing raw materials for producing sintered ore and pellet ore and crushing and mixing machine |
| CN110787724A (en) * | 2019-12-03 | 2020-02-14 | 四川致远锂业有限公司 | Fine lithium ore granulation process and granulator |
| 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 |
| CN114891999A (en) * | 2022-05-16 | 2022-08-12 | 唐山钢铁集团有限责任公司 | Ore blending method for producing alkaline pellets by belt type roasting machine |
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Application publication date: 20161116 |