CN106435170A - Method and mineral powder mixture for preparing alkaline pellets - Google Patents
Method and mineral powder mixture for preparing alkaline pellets Download PDFInfo
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- CN106435170A CN106435170A CN201610875078.7A CN201610875078A CN106435170A CN 106435170 A CN106435170 A CN 106435170A CN 201610875078 A CN201610875078 A CN 201610875078A CN 106435170 A CN106435170 A CN 106435170A
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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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- 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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Abstract
The invention discloses a method and a mineral powder mixture for preparing alkaline pellets, which are applied to the field of blast furnace metallurgy. The method for preparing the alkaline pellets comprises the following steps: uniformly mixing slaked lime and sodium activated bentonite to obtain a slaked lime mixture, wherein the slaked lime mixture comprises 96 to 98 percent of the slaked lime by mass and 2 to 4 percent of the sodium activated bentonite by mass; adding the slaked lime mixture into concentrate powder, and mixing uniformly to obtain the mineral powder mixture, wherein the mineral powder mixture comprises 95 to 99 percent of the concentrate powder by mass and 1 to 5 percent of the slaked lime mixture by mass; and preparing the mineral powder mixture into green pellets, screening the green pellets with qualified particle sizes, and performing a roasting process to obtain the alkaline pellets. Through the method and the mineral powder mixture for preparing the alkaline pellets, the technical problem that the use ratio of the pellets in blast furnace metallurgy is low is solved, the furnace entrance ratio of the pellets is improved, and a blast furnace smelting index is improved.
Description
Technical field
The present invention relates to blast furnace field of metallurgy, more particularly, to a kind of Basic Pellets preparation method and breeze used by preparation mix
Close material.
Background technology
China's iron ore deposit mostly is lean ore, and rich ore is little.Useful raw materials are mainly thin concentrate, and rich fine ore and lump ore are little.
In this case, this preferably produces based on pelletizing, but due to historical reasons, China's blast furnace is mainly former with high-basicity sintering always
Material, more a small amount of acidic pellet ore of arranging in pairs or groups.It is continuously increased the increasingly lifting requiring with energy-conserving and environment-protective with BF Burden Materials Preparation demand,
Development pellet becomes trend.Pellet has the advantages that grade is high, gangue content is low, epigranular and intensity are good.
China's pellet production capacity has reached 200,000,000 tons at present, but main production is general acidic pellet.Acid ball
Nodulizing is the pellet of natural alkalinity, SiO2And Al2O3Comparision contents are high, and the content of the alkaline matter such as calcium and magnesium is seldom, therefore existing
Have technology produce pellet of low quality, the use ratio of pellet can be limited in order to balance the basicity of slag in blast furnace,
Therefore pellet use ratio in blast furnace process is relatively low, is unfavorable for environmental protection.
Content of the invention
The embodiment of the present invention is passed through to provide a kind of Basic Pellets preparation method and mineral powder mixed material used by preparation, solves
Pellet relatively low technical problem of use ratio in blast furnace process.
In a first aspect, embodiments providing a kind of Basic Pellets preparation method, including：By slaked lime and sodium
Bentonite is mixed into slaked lime compound, wherein, in described slaked lime compound：The mass percent of described slaked lime
For 96%～98%, the mass percent of described sodium-ionized bentonite is 2%～4%；Described slaked lime compound is allocated into concentrate
It is mixed into mineral powder mixed material, wherein, in described mineral powder mixed material in powder：The mass percent of described fine ore is 95%
～99%, the mass percent of described slaked lime compound is 1%～5%；Described mineral powder mixed material is prepared sieve after green-ball take
The fired technique of green-ball of release mesh, to obtain Basic Pellets.
Preferably, the Ca (OH) of described slaked lime2Content>92%, the content of grain diameter≤44 μm in described slaked lime
>=90%.
Preferably, water absorption rate >=700% of described sodium-ionized bentonite.
Preferably, described described mineral powder mixed material prepared after green-ball sieve take the green-ball of release mesh to carry out roasting include：
Described mineral powder mixed material makes green-ball in disc balling machine；Sieve takes the green-ball of granularity 9～16mm through described roasting technique, wherein,
The forced air drying that described roasting technique includes carrying out successively, convulsion are dried, pre- preheating, preheating, roasting, soaking and cooling, wherein,
The temperature of described preheating is 500～650 DEG C.
Preferably, described forced air drying carries out 3 minutes for 300～350 DEG C in temperature；Described convulsion drying temperature 350～
450 DEG C carry out 4～5 minutes；Described preheating carries out 5～6 minutes；Described preheating carries out 5～6 points for 700～1000 DEG C in temperature
Clock；Described roasting carries out 8～10 minutes for 1240～1260 DEG C in temperature.
Preferably, described soaking carries out 2～3 minutes at 1150 DEG C.
Second aspect, the embodiment of the invention discloses one kind prepares the mining mineral powder mixed material of Alkalinous pelletizing, including following matter
Each component of amount percentage ratio：Slaked lime 0.96%～4.9%, sodium-ionized bentonite 0.02%～0.2%, fine ore 95%～
99%.
One or more technical scheme provided in an embodiment of the present invention, at least achieves following technique effect or advantage：
Due to first passing through, slaked lime and sodium-ionized bentonite are mixed into slaked lime compound, slaked lime mixes in slaked lime
Close material in mass percent be 96%～98%, mass percent in slaked lime compound for the sodium-ionized bentonite be 2%～
4%, the height of wherein 96%～98% slaked lime with addition of the proportioning greatly reducing sodium-ionized bentonite in pellet, thus reducing
SiO2And Al2O3Content, simultaneously slaked lime will decompose in the pre- warm-up phase of roasting technique, therefore to pellet roasting intensity
Impact is little, then slaked lime compound is allocated into is mixed into mineral powder mixed material in fine ore, and fine ore is in mineral powder mixed material
Mass percent is 95%～99%, and therefore also 1%～5% slaked lime compound is alkaline components, thus effectively improving
The basicity of pellet, can produce Basic Pellets, thus it is relatively low to solve pellet use ratio in blast furnace process
Technical problem, and then Basic Pellets can improve pellet and enter stove ratio in blast furnace process, improve blast furnace process index.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing providing obtains other accompanying drawings.
Fig. 1 is the flow chart of embodiment of the present invention neutral and alkali pellet preparation method.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
Embodiments provide a kind of Basic Pellets preparation method, be applied to prepare Basic Pellets.With reference to Fig. 1
Shown, Basic Pellets preparation method provided in an embodiment of the present invention comprises the steps：
S1, slaked lime and sodium-ionized bentonite are mixed into slaked lime compound, wherein, slaked lime mixes in slaked lime
Mass percent in material be 96%～98%, mass percent in slaked lime compound for the sodium-ionized bentonite be 2%～
4%.
Specifically, in S1：First the mass ratio according to slaked lime and sodium-ionized bentonite is (96～98):(4～2) weigh and disappear
Calx and sodium-ionized bentonite, the slaked lime weighing and sodium-ionized bentonite are mixed into slaked lime compound.
Specifically, the Ca (OH) of slaked lime used in the present embodiment2Content>92%, the content of grain diameter≤44 μm
>=90%.Water absorption rate >=700% of sodium-ionized bentonite used in the present embodiment.Thus fine-grained slaked lime and high performance
The use of sodium-ionized bentonite improves the quality of the Basic Pellets of preparation.
Followed by carrying out S2, slaked lime compound is allocated in fine ore being mixed into mineral powder mixed material in S1, its
In, mass percent in mineral powder mixed material for the fine ore is 95%～99%, and slaked lime compound is in mineral powder mixed material
Mass percent is 1%～5%.
Specifically, in S2：Mass ratio according to fine ore and slaked lime compound is (95～99):(5～1) weigh essence
Breeze and slaked lime compound, then the fine ore weighing and slaked lime compound are mixed into mineral powder mixed material.Thus it is logical
Cross above-mentioned steps S1～S2 preparation mineral powder mixed material, and be the less slaked lime of first mix homogeneously usage amount and sodium swelling
Soil, then fine ore larger with usage amount for the slaked lime compound being formed is mixed, can more rapid stirring stir in fine ore
Mix uniform slaked lime, sodium-ionized bentonite.
Further, in specific implementation process, if the moisture of the mineral powder mixed material made through S2<7%, then suitably
With addition of moisture, the moisture Control making mineral powder mixed material 7%～7.5%, if the mineral powder mixed material made through S2 meets moisture
7%～7.5%, then no longer with addition of moisture.
S3, mineral powder mixed material is prepared after green-ball the fired technique of green-ball that sieve takes release mesh, to obtain Alkalinous pelletizing
Ore deposit.
Specifically, in S3：Mineral powder mixed material makes green-ball in disc balling machine, and specifically, setting release mesh is grain
Degree 9～16mm, then after making green-ball, sieve takes out the fired technique of green-ball of granularity 9～16mm, and wherein, roasting technique is included successively
The forced air drying carrying out, convulsion are dried, pre- preheating, preheating, roasting, soaking and cooling, to obtain Basic Pellets.Certainly, exist
It can also be provided that other scopes are release mesh in specific implementation process.
Specifically, mineral powder mixed material carries out making green-ball 12 minutes about in disc balling machine.
Specifically, the temperature of preheating is 500～650 DEG C.Thus slaked lime just can decompose in pre- warm-up phase, thus
Avoid impact in follow-up roasting for the slaked lime.
Specifically, forced air drying carries out 3 minutes for 300～350 DEG C in temperature.Specifically, convulsion drying temperature 350～
450 DEG C carry out 4～5 minutes.Specifically, preheating carries out 5～6 minutes.Specifically, preheating carries out 5 for 700～1000 DEG C in temperature
～6 minutes.Specifically, roasting carries out 8～10 minutes for 1240～1260 DEG C in temperature.Specifically, soaking carry out 2 at 1150 DEG C～
3 minutes.
The multiple embodiments of provided in an embodiment of the present invention Basic Pellets preparation method are given below：
Embodiment 1
Slaked lime and sodium-ionized bentonite are with mass ratio 96:4 are mixed into slaked lime compound, then by fine ore with make
Slaked lime compound with mass ratio 95:5 are mixed into mineral powder mixed material, then with addition of water mix homogeneously with by mineral powder mixed material
Moisture adjust to 7.3%.Such as, weigh 0.288kg slaked lime and 0.012kg sodium-ionized bentonite is mixed into slaked lime and mixes
Close material, then the slaked lime made compound is allocated in the 9.7kg kg fine ore weighing and be mixed into mineral powder mixed material.
Mineral powder mixed material makes green-ball 12 minutes in disc balling machine, make after green-ball terminates with sieve sieve take granularity 9～
The green-ball of 16mm, carries out following roasting technique using roasting cup to the green-ball of granularity 9～16mm that sieve takes：Green-ball is first in temperature
330 DEG C carry out forced air drying 3 minutes, are then dried 4 minutes in 400 DEG C of convulsion of temperature, then in 550 DEG C of pre- preheatings 5 minutes, connect
And preheat 5 minutes at 850 DEG C, then in 1255 DEG C of roastings 8 minutes, then in 1150 DEG C of soaking 3 minutes；Then the ball after soaking
Group's room temperature air cooling obtains Basic Pellets to less than 150 DEG C.
The index such as table 1 below of the Basic Pellets of embodiment 1 preparation：
Basic Pellets in table 1. embodiment 1 are contrasted with the index of existing acidic pellet ore
| Chemical composition | TFe | SiO2 | CaO | MgO | Al2O3 | B2 | Comprcssive strength |
| Basic Pellets | 65.26% | 2.0% | 2.23% | 0.48% | 0.36% | 1.11% | 2785N/P |
| Existing acidic pellet ore | 65.92% | 3.1% | 0.31% | 0.48% | 0.35% | 0.14% | 2759N/P |
From table 1, the Basic Pellets SiO prepared by embodiment 12Content is lower than existing acidic pellet ore 1.1 hundred
Branch, " TFe+CaO " content is higher than existing acidic pellet ore 1.57 percentage points, the Basic Pellets basicity of embodiment 1 preparation
Reach 1.1.
Embodiment 2：
Slaked lime and sodium-ionized bentonite are with mass ratio 98:2 are mixed into slaked lime compound, then by fine ore with make
Slaked lime compound with quality for 99:1 is mixed into mineral powder mixed material, then with addition of water mix homogeneously with by mineral powder mixed material
Moisture adjust to 7.5%.Such as, weigh 0.343kg slaked lime and 0.007kg sodium-ionized bentonite is mixed into slaked lime and mixes
Close material, then the slaked lime made compound is allocated in weighed 9.75kg fine ore be mixed into mineral powder mixed material.
Mineral powder mixed material makes green-ball 12 minutes in disc balling machine, make after green-ball terminates with sieve sieve take granularity 9～
The green-ball of 16mm, carries out following roasting technique using roasting cup to the green-ball of granularity 9～16mm that sieve takes：Green-ball is first in temperature
320 DEG C carry out forced air drying 3 minutes, are then dried 4 minutes in 380 DEG C of convulsion of temperature, then in 520 DEG C of 6 points of preheatings in advance of temperature
Clock, then in 850 DEG C of preheatings of temperature 6 minutes, then in 1250 DEG C of roastings of temperature 9 minutes, then in 3 points of 1150 DEG C of soaking of temperature
Clock；Pelletizing room temperature air cooling after soaking obtains Basic Pellets to less than 150 DEG C.
The index such as table 2 below of the Basic Pellets of embodiment 2 preparation：
Basic Pellets in table 2. embodiment 2 are contrasted with the index of existing acidic pellet ore
| Chemical composition | TFe | SiO2 | CaO | MgO | Al2O3 | B2 | Comprcssive strength |
| Basic Pellets | 65.26% | 1.88% | 2.72% | 0.49% | 0.33% | 1.45% | 2763N/P |
| Existing acidic pellet ore | 65.92% | 3.1% | 0.31% | 0.48% | 0.35% | 0.14% | 2759N/P |
From table 2, the Basic Pellets SiO prepared by embodiment 22Content low 1.22 percentages than acidic pellet ore
Point, the content of " TFe+CaO " is higher than existing acidic pellet ore 1.71 percentage points.The Basic Pellets basicity of embodiment 2 preparation
Reach 1.45.
Embodiment 3：
Slaked lime and sodium-ionized bentonite are with mass ratio 96:4 are mixed into slaked lime compound, then by fine ore and Sal Nitri
Grey compound is with mass ratio 99:1 is mixed into mineral powder mixed material, and the moisture of mineral powder mixed material is 7.0%.
Mineral powder mixed material makes green-ball 12 minutes in disc balling machine, make after green-ball terminates with sieve sieve take granularity 9～
The green-ball of 16mm, carries out following roasting technique using roasting cup to the green-ball of granularity 9～16mm that sieve takes：Green-ball is first in temperature
300 DEG C carry out forced air drying 3 minutes, are then dried 5 minutes in 350 DEG C of convulsion of temperature, then in 500 DEG C of 6 points of preheatings in advance of temperature
Clock, then in 700 DEG C of preheatings of temperature 6 minutes, then in 1240 DEG C of roastings of temperature 10 minutes, then in 1150 DEG C of soaking 2 of temperature
Minute, the pelletizing room temperature air cooling after soaking obtains Basic Pellets to less than 150 DEG C.
Embodiment 4：
Slaked lime and sodium-ionized bentonite are with mass ratio for 98:2 are mixed into slaked lime compound, then by fine ore and system
The slaked lime compound becoming is with mass ratio for 95:5 are mixed into mineral powder mixed material, then with addition of water mix homogeneously to mix breeze
The moisture closing material adjusts to 7.2%.
Mineral powder mixed material makes green-ball 12 minutes in disc balling machine, make after green-ball terminates with sieve sieve take granularity 9～
The green-ball of 16mm, carries out following roasting technique using roasting cup to the green-ball of granularity 9～16mm that sieve takes：Green-ball is first in temperature
350 DEG C carry out forced air drying 3 minutes, are then dried 3 minutes in 450 DEG C of convulsion of temperature, then in 650 DEG C of 5 points of preheatings in advance of temperature
Clock, then in 1000 DEG C of preheatings of temperature 5 minutes, then in 1260 DEG C of roastings of temperature 8 minutes, then in 1150 DEG C of soaking 3 of temperature
Minute；Pelletizing room temperature air cooling after soaking obtains Basic Pellets to less than 150 DEG C.
Embodiment 5：
Slaked lime and sodium-ionized bentonite are with mass ratio 97:3 are mixed into slaked lime compound, then by fine ore with make
Slaked lime compound with quality for 96:2 are mixed into mineral powder mixed material, then with addition of water to adjust the moisture of mineral powder mixed material
Whole to 7.1%.Mineral powder mixed material makes green-ball 12 minutes in disc balling machine, make after green-ball terminates with sieve sieve take granularity 9～
The green-ball of 16mm, carries out roasting technique to the green-ball of granularity 9～16mm that sieve takes:In embodiment 5, roasting technique is with reference to aforementioned
One embodiment, the present embodiment repeats no more.
Embodiment 6：
Slaked lime and sodium-ionized bentonite are with mass ratio for 97:3 are mixed into slaked lime compound, then by fine ore and system
The slaked lime compound becoming is with mass ratio for 97:3 are mixed into mineral powder mixed material, then with addition of water with by the water of mineral powder mixed material
Divide and adjust to 7.2%.Mineral powder mixed material make in disc balling machine after green-ball terminates for 11.9 minutes with sieve sieve take granularity 9～
The green-ball of 16mm, carries out roasting technique using roasting cup to the green-ball of granularity 9～16mm that sieve takes：Roasting work in embodiment 6
Skill repeats no more with reference to aforementioned any embodiment, the present embodiment.
Embodiment 7：
Slaked lime and sodium-ionized bentonite are with mass ratio 97:3 are mixed into slaked lime compound, then by fine ore with make
Slaked lime compound with mass ratio 98:2 are mixed into mineral powder mixed material, then with addition of water to adjust the moisture of mineral powder mixed material
Whole to 7.4%.Mineral powder mixed material makes green-ball 12.1 minutes in disc balling machine, makes and takes granularity 9 with sieve sieve after green-ball terminates
The green-ball of～16mm, carries out roasting technique using roasting cup to the green-ball of granularity 9～16mm that sieve takes：Roasting work in embodiment 7
Skill repeats no more with reference to aforementioned any embodiment, the present embodiment.
Based on same inventive concept, the embodiment of the present invention additionally provides one kind and prepares the mining mineral powder mixed material of Alkalinous pelletizing,
Preparation process may be referred to the step S1～S2 of aforementioned base pellet preparation method embodiment, for succinct, the basis of description
Literary composition repeats no more.
The one or more embodiments being provided by the embodiments of the present invention, at least achieve following technique effect or excellent
Point：
Due to first passing through, slaked lime and sodium-ionized bentonite are mixed into slaked lime compound, slaked lime mixes in slaked lime
Close material in mass percent be 96%～98%, mass percent in slaked lime compound for the sodium-ionized bentonite be 2%～
4%, the height of wherein 96%～98% slaked lime with addition of the proportioning greatly reducing sodium-ionized bentonite in pellet, thus reducing
SiO2And Al2O3Content, simultaneously slaked lime will decompose in the pre- warm-up phase of roasting technique, therefore to pellet roasting intensity
Impact is little, then slaked lime compound is allocated into is mixed into mineral powder mixed material in fine ore, and fine ore is in mineral powder mixed material
Mass percent is 95%～99%, and therefore also 1%～5% slaked lime compound is alkaline components, thus effectively improving
The basicity of pellet, can produce Basic Pellets, thus it is relatively low to solve pellet use ratio in blast furnace process
Technical problem, and then Basic Pellets can improve pellet and enter stove ratio in blast furnace process, improve blast furnace process index.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to including excellent
Select embodiment and fall into being had altered and changing of the scope of the invention.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprise these changes and modification.
Claims (7)
1. a kind of Basic Pellets preparation method is it is characterised in that include：
Slaked lime and sodium-ionized bentonite are mixed into slaked lime compound, wherein, in described slaked lime compound：Described
The mass percent of slaked lime is 96%～98%, and the mass percent of described sodium-ionized bentonite is 2%～4%；
Described slaked lime compound is allocated into and in fine ore, is mixed into mineral powder mixed material, wherein, in described mineral powder mixed material
In：The mass percent of described fine ore is 95%～99%, and the mass percent of described slaked lime compound is 1%～5%；
Described mineral powder mixed material is prepared the fired technique of green-ball that sieve after green-ball takes release mesh, to obtain Basic Pellets.
2. Basic Pellets preparation method as claimed in claim 1 is it is characterised in that the Ca (OH) of described slaked lime2Content>
92%, content >=90% of grain diameter≤44 μm in described slaked lime.
3. Basic Pellets preparation method as claimed in claim 1 it is characterised in that described sodium-ionized bentonite water absorption rate >=
700%.
4. Basic Pellets preparation method as claimed in claim 1 is it is characterised in that described prepare described mineral powder mixed material
After green-ball, sieve takes the fired technique of green-ball of release mesh to include：
Described mineral powder mixed material makes green-ball in disc balling machine；
Sieve takes the green-ball of granularity 9～16mm through described roasting technique, and wherein, the air blast that described roasting technique includes carrying out successively is done
Dry, convulsion is dried, pre- preheating, preheating, roasting, soaking and cooling, and wherein, the temperature of described preheating is 500～650 DEG C.
5. Basic Pellets preparation method as claimed in claim 4 it is characterised in that
Described forced air drying carries out 3 minutes for 300～350 DEG C in temperature；
Described convulsion drying carries out 4～5 minutes for 350～450 DEG C in temperature；
Described preheating carries out 5～6 minutes；
Described preheating carries out 5～6 minutes for 700～1000 DEG C in temperature；
Described roasting carries out 8～10 minutes for 1240～1260 DEG C in temperature.
6. Basic Pellets preparation method as claimed in claim 4 is it is characterised in that described soaking carries out 2～3 at 1150 DEG C
Minute.
7. a kind of prepare the mining mineral powder mixed material of Alkalinous pelletizing it is characterised in that include following mass percent each component：Disappear
Calx 0.96%～4.9%, sodium-ionized bentonite 0.02%～0.2%, fine ore 95%～99%.
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| CN109852788A (en) * | 2019-03-20 | 2019-06-07 | 首钢集团有限公司 | A kind of method and device preparing Basic Pellets with calcium hydroxide |
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| 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 |
| CN109097561A (en) * | 2018-06-29 | 2018-12-28 | 首钢京唐钢铁联合有限责任公司 | Method for producing low-silicon-melting-agent pellets by large-scale belt type roasting machine |
| CN109161678A (en) * | 2018-09-30 | 2019-01-08 | 四川德胜集团钒钛有限公司 | A kind of ameliorative Basic Pellets and preparation method thereof |
| CN109852788A (en) * | 2019-03-20 | 2019-06-07 | 首钢集团有限公司 | A kind of method and device preparing Basic Pellets with calcium hydroxide |
| CN109852788B (en) * | 2019-03-20 | 2021-05-25 | 首钢集团有限公司 | Method and device for preparing alkaline pellets by using slaked lime |
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