CN109295299A - A method of high bloodstone self fluxed pellet is prepared using rotary kiln technology addition lime stone - Google Patents
A method of high bloodstone self fluxed pellet is prepared using rotary kiln technology addition lime stone Download PDFInfo
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- CN109295299A CN109295299A CN201811501060.6A CN201811501060A CN109295299A CN 109295299 A CN109295299 A CN 109295299A CN 201811501060 A CN201811501060 A CN 201811501060A CN 109295299 A CN109295299 A CN 109295299A
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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
- C22B1/216—Sintering; Agglomerating in rotary furnaces
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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
- C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
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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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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Abstract
The present invention relates to a kind of methods for preparing high bloodstone self fluxed pellet using rotary kiln technology addition lime stone, belong to metallurgical technology field；Specifically include pretreatment of raw material, high pressure roller mill, pelletizing, drying, preheating, roasting, cooling and screening step；This method passes through with addition of appropriate magnetic iron ore, it solves decomposition of limestone heat absorption and hematite pellets preheating and baking temperature height easily leads to ring formation of rotary kiln, and interior coal blending brings the coal ash based on silicon and aluminium into and enters problem inside pelletizing, to obtain the self fluxed pellet that objectionable impurities is few, compression strength is high, expansion index is low, Well-recovered.
Description
Technical field
The method that lime stone prepares high bloodstone self fluxed pellet is added using rotary kiln technology the present invention relates to a kind of,
Belong to metallurgical technology field.
Background technique
Pelletizing method is the most widely used fine fraction iron-bearing material agglomeration method of domestic and international iron and steel enterprise, according to whether addition
Flux is divided into acid pellet and Alkalinous pelletizing again, and general basicity is that 0.8-1.2 times of Alkalinous pelletizing is known as fluxedpellets.
Fluxedpellets high temperature metallurgical properties are better than acid pellet, and are suitable for the even blast furnace smelting of whole world group at high proportion
Refining.Fluxedpellets substitutes sinter, is remarkably improved feed grade, reduces energy consumption, reduces pollutant emission, to promote
Into ironmaking system energy-saving and emission-reduction.With the increasing of national environmental protection control dynamics, sintering machine, which continues environmentally friendly upgrading, to be kept away
Exempt from, the demand of domestic fluxedpellets will be increasing.
Since calcination of hematite pellets process is almost without Fe3O4Exothermic oxidation reaction, without lattice transformation, mainly by
Fe2O3Consolidation of growing up is recrystallized, preheating and baking temperature is higher than Magnetite Pellets, and the preheating and baking time is also longer.Brazilian part
Pelletizing plant solves this problem by interior coal blending concurrent heating, but the coal ash that interior coal blending can be brought into based on silicon and aluminium enters in pelletizing
Portion influences pellet Composition Control.
Lime stone price is lower, and lime stone substitution quick lime or calcium hydroxide can significantly reduce production cost, but lime stone exists
Preheating and baking process can decompose heat absorption, use simultaneously with bloodstone, can further increase preheating temperature.
Using lime stone as the hematite pellets of flux, a certain amount of magnetic iron ore is added, it, can by magnetic iron ore oxidation heat liberation
Lattice variations and nascent crystals surface atom effectively to substitute interior coal blending additional heat, and in magnetic iron ore oxidation process have compared with
High transfer ability is conducive to form brilliant key between adjacent particle, to reduce preheating and baking temperature.
Summary of the invention
High bloodstone fluxedpellets is prepared using rotary kiln technology addition lime stone the object of the present invention is to provide a kind of
The method of mine, by solving decomposition of limestone heat absorption and hematite pellets preheating and baking temperature height easily being led with addition of appropriate magnetic iron ore
It causes ring formation of rotary kiln and interior coal blending to bring the coal ash based on silicon and aluminium into and enters problem inside pelletizing, to obtain nocuousness
The self fluxed pellet that impurity is few, compression strength is high, expansion index is low, Well-recovered.
For realize foregoing invention purpose, the technical solution adopted by the present invention is as follows:
A method of high bloodstone self fluxed pellet being prepared using rotary kiln technology addition lime stone, including is walked as follows
It is rapid:
(1) pretreatment of raw material: magnetic iron ore and bloodstone are handled by ore grinding to desired granularity, and pretreatment of raw material is using dry
Mill or wet-grinding technology and relative device；Lime stone is crushed to from bulk to granular, then further levigate powdering simultaneously；
(2) magnetic iron ore, bloodstone and lime stone that granularity is met the requirements high pressure roller mills: are separated or are mixed laggard horizontal high voltage
Roller is ground, and material stores in dashpot after high pressure roller mill；
(3) pelletizing: the material after high pressure roller mill mixes after adding binder, using disk or pelletising drum pelletizing,
Obtain the green-ball of intensity, granularity and moisture qualification；
(4) dry, preheating, roasting: by grate, rotary kiln device, temperature and air quantity is controlled, green-ball is gradually done
It is dry, preheat and be fired into high-intensitive finished ball nodulizing；
(5) cooling and screening: satisfaction transport is made by circular cooler and screening plant in roasting finished ball nodulizing
With the finished ball nodulizing of storage request；
The content of TFe is 62.0%-71.0%, SiO in magnetic iron ore described in step (1)2Content 0.5%-4.5%,
44 μm of granule content >=60% below after pretreatment；
Lime stone CaO content >=52.0% described in step (1), 44 μm of granule content >=70% below after pretreatment；
Parts by weight of raw materials described in step (2) are as follows: 15-30 parts of magnetic iron ore, 70-85 parts of bloodstone, 3-5 parts of lime stone；
Specific surface area >=1500cm after the roller mill of material after high pressure roller mill described in step (2)2/g；
Binder described in step (3) is that binder is bentonite, and dosage is 0.5-2.0%；
Intensity, granularity and the moisture of green-ball described in step (3) are respectively drop strength >=5 time, granularity 8-18mm, water
Divide 8.0-9.0%；
Temperature described in step (4) and air quantity are respectively as follows:
The dry section box temperature of grate drum: 170-250 DEG C, grate drains a section petticoat pipe temperature: 350-420 DEG C, grate
Preheated one-section petticoat pipe temperature: 700-850 DEG C, grate preheats two sections of petticoat pipe temperature: 1000-1100 DEG C, grate drum does section wind
Amount: 8000~10000m3/ min, grate drain a section air quantity: 15000~20000m3/ min, grate preheated one-section air quantity:
17000~22000m3/ min, grate preheat two sections of air quantity: 15000~20000m3/min, maturing temperature in rotary kiln
1220-1280 DEG C, -20~-100Pa of rotary kiln end negative pressure.
In the pellet ultimate constituent described in step (5), the content of TFe is 62.0%-67.0%, and the content of CaO is
2.0%-3.0%, the dual alkalinity B of pellet2(CaO/SiO2) it is 0.8-1.2；
The granularity of finished ball nodulizing described in step (5) is 8-18mm.
The beneficial effects of the present invention are:
1, interior coal blending is substituted using magnetic iron ore, reduces pellet gangue content and objectionable impurities is brought into, meets BF Burden Materials Preparation
Guideline mandates；
2, using the lattice variations in magnetic iron ore oxidation process, bloodstone fluxedpellets preheating and baking temperature is reduced；
3, quick lime or calcium hydroxide are substituted using lime stone, reduces production cost；
4, self fluxed pellet metallurgical performance is good, can large scale substitute sinter, promote ironmaking system energy-saving and emission-reduction；
5, domestic at present substantially to produce based on acidic pellet ore, with the increasing of national environmental protection control dynamics, sintering machine
Continuing environmental protection upgrading will be inevitable, and the demand of domestic fluxedpellets will be increasing.In addition, domestic pelletizing production
Technique is in the majority with grate rotary kiln, and the wish for producing fluxedpellets is more and more stronger, and the present invention has due to its superiority
Preferable application value.
Specific embodiment
The present invention is described in further details below by example, these examples are only used to illustrate the present invention, and unlimited
The scope of the present invention processed.
Embodiment 1
A method of high bloodstone self fluxed pellet being prepared using rotary kiln technology addition lime stone, including is walked as follows
It is rapid:
(1) pretreatment of raw material: magnetic iron ore and bloodstone are handled by ore grinding to desired granularity, and pretreatment of raw material can be used
Dry grinding or wet-grinding technology and relative device, wherein the content of TFe is 62.0%-71.0%, SiO in magnetic iron ore2Content 0.5%-4.5%, in advance
44 μm of granule content >=60% below after processing；Lime stone is crushed to from bulk simultaneously granular, is then further finely ground to
Powdery, wherein CaO content >=52.0%, 44 μm of granule content >=70% below after pretreatment；
(2) magnetic iron ore, bloodstone and lime stone that granularity is met the requirements high pressure roller mills: are separated or are mixed laggard horizontal high voltage
Roller is ground, and material stores in dashpot after high pressure roller mill, specific surface area >=1500cm after the roller mill of material after high pressure roller mill2/ g,
Wherein parts by weight of raw materials is respectively as follows: 30 parts of magnetic iron ore, 85 parts of bloodstone, 5 parts of lime stone；
(3) it pelletizing: by the material after high pressure roller mill, is mixed after adding 2.0% bentonite, utilizes disk or pelletising drum
Pelletizing obtains the green-ball of intensity, granularity and moisture qualification, and intensity, granularity and the moisture of green-ball are respectively drop strength >=5 time,
Granularity 18mm, moisture 9.0%；
(4) dry, preheat, roasting: by grate, rotary kiln device, control reasonable temperature and air quantity, by green-ball by
Step is dry, preheat and is fired into the high-intensitive finished ball nodulizing that granularity is 18mm；
(5) cooling and screening: satisfaction transport is made by circular cooler and screening plant in roasting finished ball nodulizing
The suitable finished ball nodulizing with the granularity of storage request, wherein the content of TFe is 62.0%-67.0%, and the content of CaO is
2.0%-3.0%, the dual alkalinity B of pellet2(CaO/SiO2) it is 0.8-1.2；
The temperature and air quantity is respectively as follows:
The dry section box temperature of grate drum: 250 DEG C, grate drains a section petticoat pipe temperature: 420 DEG C, grate preheated one-section
Petticoat pipe temperature: 850 DEG C, grate preheats two sections of petticoat pipe temperature: 1100 DEG C, grate drum does section air quantity 10000m3/ min, chain grate
Machine drains a section air quantity: 20000m3/ min, grate preheated one-section air quantity: 22000m3/ min, grate preheat two sections of air quantity:
20000m3/ min, 1280 DEG C of maturing temperature in rotary kiln, rotary kiln end negative pressure -100Pa.
Embodiment 2
A method of high bloodstone self fluxed pellet being prepared using rotary kiln technology addition lime stone, including is walked as follows
It is rapid:
(1) pretreatment of raw material: magnetic iron ore and bloodstone are handled by ore grinding to desired granularity, and pretreatment of raw material can be used
Dry grinding or wet-grinding technology and relative device, wherein the content of TFe is 62.0%-71.0%, SiO in magnetic iron ore2Content 0.5%-4.5%, in advance
44 μm of granule content >=60% below after processing；Lime stone is crushed to from bulk simultaneously granular, is then further finely ground to
Powdery, wherein CaO content >=52.0%, 44 μm of granule content >=70% below after pretreatment；
(2) magnetic iron ore, bloodstone and lime stone that granularity is met the requirements high pressure roller mills: are separated or are mixed laggard horizontal high voltage
Roller is ground, and material stores in dashpot after high pressure roller mill, specific surface area >=1500cm after the roller mill of material after high pressure roller mill2/ g,
Wherein parts by weight of raw materials is respectively as follows: 15 parts of magnetic iron ore, 70 parts of bloodstone, 3 parts of lime stone；
(3) it pelletizing: by the material after high pressure roller mill, is mixed after adding 0.5% bentonite, utilizes disk or pelletising drum
Pelletizing obtains the green-ball of intensity, granularity and moisture qualification, and intensity, granularity and the moisture of green-ball are respectively drop strength >=5 time,
Granularity mm, moisture 8.0%；
(4) dry, preheat, roasting: by grate, rotary kiln device, control reasonable temperature and air quantity, by green-ball by
Step is dry, preheat and is fired into the high-intensitive finished ball nodulizing that granularity is 8mm；
(5) cooling and screening: satisfaction transport is made by circular cooler and screening plant in roasting finished ball nodulizing
The suitable finished ball nodulizing with the granularity of storage request, wherein the content of TFe is 62.0%-67.0%, and the content of CaO is
2.0%-3.0%, the dual alkalinity B of pellet2(CaO/SiO2) it is 0.8-1.2；
The temperature and air quantity is respectively as follows:
The dry section box temperature of grate drum: 170 DEG C, grate drains a section petticoat pipe temperature: 350 DEG C, grate preheated one-section
Petticoat pipe temperature: 700 DEG C, grate preheats two sections of petticoat pipe temperature: 1000 DEG C, grate drum does section air quantity: 8000m3/ min, chain grate
Machine drains a section air quantity: 15000m3/ min, grate preheated one-section air quantity: 17000m3/ min, grate preheat two sections of air quantity:
15000m3/ min, 1220 DEG C of maturing temperature in rotary kiln, rotary kiln end negative pressure -20Pa.
Embodiment 3
The invention has been successfully applied to Baosteel Zhanjiang steel pellet production line, which adds lime using rotary kiln technology
Standby high bloodstone self fluxed pellet made of stones, product objectionable impurities is few, compression strength is high, expansion index is low, Well-recovered, year
Production capacity reaches ten thousand tons of 450-500, is specifically shown in Table 1.
The table 6-9 month in 12018 produces high bloodstone self fluxed pellet ingredient and performance table
As shown in Table 1, the self fluxed pellet objectionable impurities of patent of invention method production is few, compression strength is high, expansion
Index is low, Well-recovered.
Claims (10)
1. a kind of method for preparing high bloodstone self fluxed pellet using rotary kiln technology addition lime stone, it is characterised in that:
Include the following steps:
(1) pretreatment of raw material: magnetic iron ore and bloodstone are handled by ore grinding to desired granularity, pretreatment of raw material using dry grinding or
Wet-grinding technology and relative device；Lime stone is crushed to from bulk to granular, then further levigate powdering simultaneously；
(2) magnetic iron ore, bloodstone and lime stone that granularity is met the requirements high pressure roller mills: are separated or are mixed laggard horizontal high voltage roller
It grinds, material stores in dashpot after high pressure roller mill；
(3) it pelletizing: by the material after high pressure roller mill, mixes after adding binder, using disk or pelletising drum pelletizing, obtains
The green-ball of intensity, granularity and moisture qualification；
(4) dry, preheating, roasting: by grate, rotary kiln device, controlling temperature and air quantity, green-ball is gradually dry, pre-
Heat is simultaneously fired into high-intensitive finished ball nodulizing；
(5) cooling and screening: satisfaction transport and storage is made by circular cooler and screening plant in roasting finished ball nodulizing
Deposit the finished ball nodulizing of requirement.
2. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: in magnetic iron ore described in step (1) content of TFe be 62.0%-71.0%, SiO2Content
0.5%-4.5%, 44 μm of granule content >=60% below after pretreatment.
3. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: lime stone CaO content >=52.0% described in step (1), 44 μm of particles below contain after pretreatment
Amount >=70%.
4. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: parts by weight of raw materials described in step (2) are as follows: 15-30 parts of magnetic iron ore, 70-85 parts of bloodstone, lime
3-5 parts of stone.
5. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: after high pressure roller mill described in step (2) material roller mill after specific surface area >=1500cm2/g。
6. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: binder described in step (3) be binder be bentonite, dosage is 0.5-2.0%.
7. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: intensity, granularity and the moisture of green-ball described in step (3) are respectively drop strength >=5 time, grain
Spend 8-18mm, moisture 8.0-9.0%.
8. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: temperature described in step (4) and air quantity are respectively as follows:
The dry section box temperature of grate drum: 170-250 DEG C, grate drains a section petticoat pipe temperature: 350-420 DEG C, grate preheats
One section of petticoat pipe temperature: 700-850 DEG C, grate preheats two sections of petticoat pipe temperature: 1000-1100 DEG C, grate drum does section air quantity:
8000~10000m3/ min, grate drain a section air quantity: 15000~20000m3/ min, grate preheated one-section air quantity: 17000
~22000m3/ min, grate preheat two sections of air quantity: 15000~20000m3/ min, maturing temperature 1220- in rotary kiln
1280 DEG C, -20~-100Pa of rotary kiln end negative pressure.
9. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone self fluxed pellet
Method, it is characterised in that: in the pellet ultimate constituent described in step (5), the content of TFe is 62.0%-67.0%, CaO
Content be 2.0%-3.0%, the dual alkalinity B of pellet2(CaO/SiO2) it is 0.8-1.2.
10. according to claim 1 it is a kind of using rotary kiln technology addition lime stone prepare high bloodstone fluxedpellets
The method of mine, it is characterised in that: the granularity of finished ball nodulizing described in step (5) is 8-18mm.
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| CN201811501060.6A CN109295299A (en) | 2018-12-10 | 2018-12-10 | A method of high bloodstone self fluxed pellet is prepared using rotary kiln technology addition lime stone |
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|---|---|---|---|
| CN201811501060.6A CN109295299A (en) | 2018-12-10 | 2018-12-10 | A method of high bloodstone self fluxed pellet is prepared using rotary kiln technology addition lime stone |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821650A (en) * | 2019-02-15 | 2019-05-31 | 河北钢铁集团矿业有限公司 | A kind of high silicon bloodstone tailing treatment technology |
| CN110004289A (en) * | 2019-04-03 | 2019-07-12 | 宝钢湛江钢铁有限公司 | A kind of method that high mixture ratio sintering card powder is used for fluxed pellets production |
| CN111304436A (en) * | 2020-03-05 | 2020-06-19 | 中南大学 | Low-energy-consumption high-quality vanadium-titanium pellet preparation method based on high-pressure roller grinding pretreatment |
| CN111304435A (en) * | 2020-03-05 | 2020-06-19 | 中南大学 | Pellet energy-saving and emission-reducing method for activating hard-to-burn iron ore through mechanical and chemical coupling |
| CN113186391A (en) * | 2021-04-01 | 2021-07-30 | 首钢京唐钢铁联合有限责任公司 | Pellet and preparation method thereof |
| CN113333770A (en) * | 2021-05-31 | 2021-09-03 | 中南大学 | Preparation method of powder metallurgy iron powder |
| CN113930612A (en) * | 2021-10-15 | 2022-01-14 | 四川德胜集团钒钛有限公司 | Limestone alkaline pellet and preparation process thereof |
| CN114622091A (en) * | 2022-03-04 | 2022-06-14 | 山东钢铁集团永锋临港有限公司 | Preparation method of pellet for blast furnace ironmaking |
| 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 |
| 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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| CN102828022A (en) * | 2012-09-11 | 2012-12-19 | 新兴能源装备股份有限公司 | Production process of pure hematite alkaline pellets |
| CN103789537A (en) * | 2014-02-10 | 2014-05-14 | 山西太钢不锈钢股份有限公司 | Method for reducing pellet production energy consumption by using iron scale |
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| CN102828022A (en) * | 2012-09-11 | 2012-12-19 | 新兴能源装备股份有限公司 | Production process of pure hematite alkaline pellets |
| CN103789537A (en) * | 2014-02-10 | 2014-05-14 | 山西太钢不锈钢股份有限公司 | Method for reducing pellet production energy consumption by using iron scale |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821650A (en) * | 2019-02-15 | 2019-05-31 | 河北钢铁集团矿业有限公司 | A kind of high silicon bloodstone tailing treatment technology |
| CN110004289A (en) * | 2019-04-03 | 2019-07-12 | 宝钢湛江钢铁有限公司 | A kind of method that high mixture ratio sintering card powder is used for fluxed pellets production |
| CN110004289B (en) * | 2019-04-03 | 2021-04-16 | 宝钢湛江钢铁有限公司 | Method for producing fluxed pellets by using high-proportion sintering card powder |
| CN111304436A (en) * | 2020-03-05 | 2020-06-19 | 中南大学 | Low-energy-consumption high-quality vanadium-titanium pellet preparation method based on high-pressure roller grinding pretreatment |
| CN111304435A (en) * | 2020-03-05 | 2020-06-19 | 中南大学 | Pellet energy-saving and emission-reducing method for activating hard-to-burn iron ore through mechanical and chemical coupling |
| 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 |
| CN113186391A (en) * | 2021-04-01 | 2021-07-30 | 首钢京唐钢铁联合有限责任公司 | Pellet and preparation method thereof |
| CN113333770A (en) * | 2021-05-31 | 2021-09-03 | 中南大学 | Preparation method of powder metallurgy iron powder |
| CN113930612A (en) * | 2021-10-15 | 2022-01-14 | 四川德胜集团钒钛有限公司 | Limestone alkaline pellet and preparation process thereof |
| CN114622091A (en) * | 2022-03-04 | 2022-06-14 | 山东钢铁集团永锋临港有限公司 | Preparation method of pellet for blast furnace ironmaking |
| 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 |
| CN114891999B (en) * | 2022-05-16 | 2024-06-28 | 唐山钢铁集团有限责任公司 | Ore proportioning method for producing alkaline pellets by belt type roasting machine |
| 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 |
| CN115198087B (en) * | 2022-06-23 | 2023-04-25 | 华北理工大学 | Method for inhibiting looping of high-silicon magnesium flux pellet rotary kiln |
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Application publication date: 20190201 |