CN100379887C - Sintering heat gradient optimizing method for iron and steel metallurgical industry - Google Patents
Sintering heat gradient optimizing method for iron and steel metallurgical industry Download PDFInfo
- Publication number
- CN100379887C CN100379887C CNB2006100439813A CN200610043981A CN100379887C CN 100379887 C CN100379887 C CN 100379887C CN B2006100439813 A CNB2006100439813 A CN B2006100439813A CN 200610043981 A CN200610043981 A CN 200610043981A CN 100379887 C CN100379887 C CN 100379887C
- Authority
- CN
- China
- Prior art keywords
- fuel
- iron
- mixes
- metallurgical industry
- heat gradient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention discloses a method for optimizing sintering heat gradient of iron and steel metallurgical industry, which solves the abuse of unreasonable heat distribution existing in the existing process technology. The present invention has the advantages that the invention which is simple, convenient and easy to operate can reduce the fuel content at the lower part of a material bed and increase the fuel content of the upper part of the material bed, and thereby, the heat distribution tends to be uniform so that the production process achieves the purposes of energy saving, consumption reduction, superior quality, high efficiency, etc. The method of the present invention comprises the following procedures: (1) iron ore powder and a fusing agent are sent into a material blending chamber to blend materials proportionally, and simultaneously, fuel in the proportion of 30% less than that of the total amount of the fuel is added; (2) the blended materials are mixed for at least one time; (3) residual fuel which occupies 70 to 100% of the total amount of the fuel is added for one time or for a plurality of times into the mixed materials which are mixed for not less than once after every time the fuel is added; (4) the mixed materials with the fuel are distributed, ignited and calcined to obtain the needed sintered ore.
Description
Technical field
The present invention relates to the processing method of sintering production process in a kind of iron and steel metallurgical industry, relate in particular to a kind of sintering heat gradient optimizing method that is used for iron and steel metallurgical industry.
Background technology
SINTERING PRODUCTION is a key link in the ferrous metallurgy technical process, its main purpose is that the powdered iron ore that will contain certain grade (comprises rich ore powder and fine ore etc., down together), allocate a certain amount of flux (unslaked lime, rhombspar etc. in proportion in proportioning room, together following) and fuel (coke powder or coal dust etc., by after certain technology roasting, form ore agglomerates---agglomerate down together), use for blast-furnace smelting with certain ingredients and other performance requriements.
In the SINTERING PRODUCTION technological process, after will passing through a series of links processing such as batching, batch mixing, with the compound that obtains by processing requirement, be distributed to pallet top equably, (be roasting through igniting and down draft sintering again, down together), produce high temperature after the fuel combustion wherein, will contain powdered iron ore and different types of flux melts, and after variations such as complex physico-chemical and other crystallizable mineral take place, the final agglomerate that has certain performance, meets the iron-smelting process specification of quality that forms.
The purpose of blending process is with different types of powdered iron ore, flux and fuel etc. of containing, and fits over uniformly and stably together by a certain percentage, forms the compound of preparing roasting.
The purpose of batch mixing, be to mix for the compound that will prepare, and employing specific equipment, by the batch mixing process and add other auxiliary processes such as water, make formation such as breeze, flux, fuel have that certain particle size is formed, the small spherical particles (being a kind of accurate particle) of certain moisture content, for roasting process ready.Batch mixing process specific equipment commonly used has drum mixer or garden dish mixing machine etc., the batch mixing number of times that each enterprise adopted have nothing in common with each other (be generally secondary or three times), the number of times of batch mixing is called batch mixing, rerolling etc. sequentially successively, and the rest may be inferred.In the batch mixing process, for satisfy batch mixing, make ball, different needs such as granulation and flux digestion, generally to add a certain amount of moisture, even also will add some other supplies and auxiliary process link sometimes according to each enterprise practical conditions by processing requirement.Generally speaking, though the production technique between each enterprise is not quite similar, its main flow process is similar, and ultimate principle all is the same.
Compound is through batching and the material that forms after repeatedly mixing, and is exactly the material before the igniting roasting in the sintering process.As previously mentioned, it is mainly formed is the mixture of powdered iron ore, flux, fuel etc., and just after repeatedly multi-form mixing, formation has the mixture of certain moisture, certain bead size composition.
As previously mentioned, in present production process, the technology of public use and technical process such as Fig. 1-shown in Figure 6.In these technical process, all be by batching beginning, adopt equipment such as drum mixer or garden dish mixing machine, behind the batch mixing of different number of times (secondary or three inferior),, to pallet, light a fire and the processing of subsequent technique such as exhausting roasting by processing requirement cloth.
Key wherein is the technology of allocating into of fuel.Because the history in existing so far more than 70 year of SINTERING PRODUCTION, in traditional production technique, the adding mode of fuel all is to participate in batching in proportioning room, promptly with other various materials (as iron charge, flux etc.) together, batching in proportion.In the nineties in last century, the novel process of " the fuel branch adds " is just proposed, be about to 50～60% of total amount of fuel and add by original mode in proportioning room, in addition 40～50% change into secondary and add before or after mixing.Under this historical background, the enterprise that has has carried out technological transformation to original technology, the fuel branch is added this novel process to be applied to produce, the enterprise that has does not transform at all, still continue to use the original production technique that adds all fuel in proportioning room, even many newly-built sinter machine production lines, be in the consideration (as be subjected to place restriction, think that the fuel branch adds DeGrain etc.) of others, also still continue to use the original traditional technology that adds whole fuel in proportioning room.So, just caused in the production technology of present public use, the adding mode of fuel is divided into two kinds of situations and deposits: a kind of is at the required whole fuel of the disposable adding of proportioning room; Another kind be the production technique that adopts the fuel branch to add (promptly add 50～60% of total amount of fuel in proportioning room, before or after secondary mixes, add total amount of fuel 40～50%).
The characteristics of process are down draft sinterings owing to bake with agglomeration, be about to compound through the roughing processing, press processing requirement cloth to pallet top, the surface is after the ignition furnace igniting, under the effect of main exhauster exhausting negative pressure, operation forward along with chassis, carbon in the compound is burning gradually from top to bottom, under high temperature action, make the particle surface fusing of materials such as breeze, various crystallizations and complicated physical and chemical reaction also carry out thereupon, when chassis ran to the sinter machine afterbody, the bed of material is all burnt from top to bottom, and blocky finished product agglomerate also just forms, again through fragmentation, cooling, after different links such as screening are handled, send the blast-furnace smelting use with finished product (promptly＞5mm part) agglomerate.
For output and the quality that improves agglomerate, require the temperature distribution of roasting process even more, help more producing.And in actual production, being difficult to but accomplish that the temperature of roasting process is even, major cause is exactly that characteristics by the sintering process process are determined.In actual production, the bottom heat of the bed of material is seriously superfluous often, make the compound superfusion, the top heat is then obviously not enough, make compound be difficult to reach the purpose of fusing caking, final disastrous effect then is that sinter quality is inhomogeneous, yields poorly, energy consumption height, other processing parameter such as exhausting negative pressure etc. be variation correspondingly also.
Forming this heat distribution inhomogeneous along the bed depth direction (is that aforesaid bottom heat is seriously superfluous, the obvious insufficient phenomenon of top heat) reason mainly contained two: one, under aforesaid traditional technology condition, fuel is always toward material layer lower part segregation (as Figure 10) in the cloth process, and the heat that fuel combustion produces is the few and lower floor many (as Figure 11) in upper strata naturally; The 2nd, in roasting process, combustion air temperature during the top fuel combustion is low, (temperature of the superiors' combustion air is near envrionment temperature), past more bottom, the required combustion air of fuel combustion is because of being subjected to the pre-heat effect of top thermal sintering ore bed, its temperature raise successively (the said auto accumulation heat effect of technical term that Here it is).That is to say that in roasting process, along bed depth more down, the effect of auto accumulation heat is also with regard to big more (as Figure 12).More than two factor mutual superposition, the heat that makes material layer lower part naturally is obviously superfluous, the heat on top is obviously not enough (Figure 13) then.
In other words, in the technology of public use at present, the problem and the shortcoming that exist are exactly (specifically, to be exactly obviously deficiency of top heat along the heat distribution of bed depth direction is obviously inhomogeneous, and the bottom heat is excessive), thereby cause the energy consumption height of production process, poor product quality, and composition instability, various performances are inhomogeneous etc., restricting the realization of targets such as high yield, low consumption, high-quality and equipment longevity.
Goal of the invention
Purpose of the present invention is exactly in order to solve the irrational drawback of heat distribution that existing Technology exists, under the constant situation of present other technologies, provide a kind of simple and easy to do, can reduce the fuel content of material layer lower part, increase the fuel content on bed of material top, thereby heat distribution is tending towards evenly, makes production process reach the sintering heat gradient optimizing method that is used for iron and steel metallurgical industry of advantage such as energy-saving and cost-reducing, high-quality and efficient.
For achieving the above object, the present invention has adopted following technical scheme: a kind of sintering heat gradient optimizing method that is used for iron and steel metallurgical industry, and its method is:
(1) powdered iron ore and flux are sent into proportioning room and prepare burden in proportion, add fuel simultaneously less than total amount of fuel 30%;
(2) material for preparing carries out mixed once at least;
(3) in the material that mixes, add the remaining fuel that accounts for total amount of fuel 70-100% one or more times, again carry out at least mixed once after adding fuel at every turn;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Its method is:
(1) iron charge and flux being sent into proportioning room prepares burden in proportion;
(2) material for preparing carries out mixed once at least;
(3) whole 100% required fuel of disposable adding in the material that mixes, and then carry out mixed once at least;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Its method is:
(1) iron charge and flux are sent into proportioning room and prepare burden in proportion, add the fuel that accounts for total amount of fuel 30% simultaneously;
(2) material for preparing carries out twice mixing;
(3) the remaining fuel that accounts for total amount of fuel 70% of disposable adding in the material that mixes, and then carry out mixed once at least;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Adopt mixing machine to mix during described mixing.
Adopt the disk mixing machine to mix during described mixing.
Each link to the technological process of production is carried out systems analysis, discovery is in blending process, fuel is allocated in the compound with early (being meant disposable all the allocating into of proportioning room and partly allocating into proportioning room and the fuel branch adds part and allocates two kinds of situations into), after mixing equipment (referring to drum mixer or disk mixing machine) mixed pelletizing is granulated, the parts of fine granular fuel enters the inside of compound bead, in the cloth process, easily particle segregation takes place and cloth bottom the bed of material, cause thus along the heat distribution of bed depth direction inhomogeneous (bottom heat surplus and top shortage of heat).The present invention proposes the technical scheme of solution promptly at this phenomenon, exactly the heat gradient in the sintering process is optimized, ultimate aim is to reduce the heat of material layer lower part, increase the heat on bed of material top, make the top and the bottom heat be tending towards evenly satisfying the SINTERING PRODUCTION processing requirement better.
Method of the present invention is, change traditional fuel and allocate method into, fuel allocate the mode that neither employing is all once allocated in proportioning room into, do not adopt partly to allocate into the secondary branch to add the mode allocated into of part yet, allocate fuel into last (referring to last) cylinder (or disk) the mixing machine disposable mode of allocating into of correct position before but will adopt a cylinder (or disk) mixing machine after in proportioning room.
In the first batch mixing process of cylinder (or disk) mixing machine, fuel does not allocate into, more help compound under this condition and (comprise powdered iron ore and various flux, but fuel not wherein) make ball granulate (because from the performance of material, fuel is granulated totally unfavorable to the ball of making of compound).Make the ball pelletization near finishing when compound, to the end before a cylinder (or disk) mixing machine, whole disposable required fuel of allocating into, in the last batch mixing process of process, fuel pellet can not enter the granule interior of balling-up, but distributes along the bed depth direction in the cloth process in the following several ways:
The one, the parts of fine granular fuel sticks to the surface of compound bead, under the effect of segregation distribution, be distributed to material layer lower part in the cloth process, after adopting this technology, compound bead inside there is no the existence of fuel pellet, and the fuel content of material layer lower part is reduced; The 2nd, the not mixed material bead of another part fine particle fuel surface adheres to, but mix with fine grain other material (as powdered iron ore, flux etc.) in the compound, under the effect of segregation distribution, be distributed to bed of material top, also just cause the fuel content on bed of material top will to increase to some extent than existing disclosed technology; The 3rd, the fuel pellet that all the other granularities are thicker, (more than existing disclosed technology on the total amount) can freely distribute according to the rule of natural segregation in the cloth process, but because of total amount more, can all not be segregated in material layer lower part, but can distribute along the bed depth direction more equably.
So, after adopting the present invention, fuel obviously weakens toward the degree of material layer lower part segregation in the cloth process, even being tending towards uniformity (as Figure 14) along the distribution of bed thickness direction, the heat that fuel combustion produced is that the distribution along the bed thickness direction also is tending towards uniformity (as Figure 15) substantially naturally; But the heat that combustion air is brought into during fuel combustion is along the distribution of bed thickness direction, compare with the technology of present public use constant substantially (as Figure 16), that is to say that the auto accumulation heat effect of implementing before and after this technology remains unchanged substantially along the distribution of bed thickness direction.More than after two factors (referring to Figure 15 and Figure 16) mutual superposition, naturally make heat also obviously be tending towards evenly (referring to compare) with technology Figure 13 of present public use along the distribution of bed thickness direction, the thermograde ratio is implemented to reduce to some extent before this technology, and promptly the heat distribution along the bed thickness direction is tending towards evenly (as Figure 17).
Beneficial effect of the present invention is:
The energy consumption that at first is unit product (agglomerate for example per ton) obviously descend (unit consumption that comprises fuel, electricity, coal gas equal energy source medium);
Next is that productive capacity is improved, and output improves, and yield rate rises;
The 3rd is that quality product obviously improves (comprising all respects such as stable components such as FeO, intensity improve, metallurgical performance improves, size composition is more evenly reasonable);
The 4th is that grid section etc. prolongs equipment life, helps ordinary production to safeguard (sizing and scaling loss degree as the grate bar obviously alleviate);
The 5th is to help environment protection (as reducing reentrainment of dust because of yield rate improves, reducing exhaust gas discharging etc. because of fuel saving), has obvious social.
Description of drawings
Fig. 1 does not have fuel to divide the technical process of added-time for having now when three cylindrical sections or disk mix;
Fig. 2 has the process flow sheet that the fuel branch adds for having now when three cylindrical sections or disk mix;
Fig. 3 is for having the process flow sheet that does not have the fuel branch to add when two cylindrical sections or disk mix now;
Fig. 4 has the process flow sheet that the fuel branch adds for having now when two cylindrical sections or disk mix;
The process flow sheet that Fig. 5 does not have the fuel branch to add when mixing for existing alternate manner;
Fig. 6 has the process flow sheet that the fuel branch adds when mixing for existing alternate manner;
Process flow sheet when Fig. 7 is two cylindrical sections of the present invention or disk mixing machine batch mixing;
Process flow sheet when Fig. 8 is three cylindrical sections of the present invention or disk mixing machine batch mixing;
Process flow sheet when Fig. 9 is the mixing machine batch mixing of other various different modes of the present invention
Figure 10 be in the prior art coke powder along the synoptic diagram of bed thickness direction segregation;
Figure 11 is the synoptic diagram that the heat after the coke powder burning distributes along the bed thickness direction in the prior art;
The synoptic diagram of the heat distribution that combustion air was brought into when Figure 12 burnt for coke powder in the prior art;
Figure 13 is the synoptic diagram that distributes along the total heat of bed thickness direction in the actual production process in the prior art;
Figure 14 is the synoptic diagram of coke powder of the present invention along the segregation of bed thickness direction;
The synoptic diagram that the heat of Figure 15 after for coke powder of the present invention burning distributes along the bed thickness direction;
The synoptic diagram of the heat distribution that combustion air was brought into when Figure 16 burnt for coke powder of the present invention;
The synoptic diagram of Figure 17 for distributing along the total heat of bed thickness direction in the actual production process of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Embodiment one:
Among Fig. 7, in the present embodiment, its method is:
(1) iron charge and flux being sent into proportioning room prepares burden in proportion;
(2) material for preparing adopts mixing machine to carry out mixed once;
(3) fuel of disposable adding whole 100% in the material that mixes, and then carry out the second time with mixing machine and mix;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Embodiment two:
Among Fig. 8, in the present embodiment, its method is:
(1) iron charge and flux being sent into proportioning room prepares burden in proportion;
(2) material for preparing carries out twice mixing with mixing machine;
(3) fuel of disposable adding whole 100% in the material that mixes, and then mix for the third time with mixing machine;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Embodiment three:
Among Fig. 9, in the present embodiment, its method is:
(1) iron charge and flux being sent into proportioning room prepares burden in proportion;
(2) material for preparing carries out mixed once at least with disk mixing machine or other mixing equipment;
(3) fuel of disposable adding whole 100% in the material that mixes, and then carry out mixed once at least with disk mixing machine or other mixing equipment;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Embodiment four:
In the present embodiment, its method is:
(1) iron charge and flux are sent into proportioning room and prepare burden in proportion, add the fuel that accounts for total amount of fuel 30% simultaneously;
(2) material for preparing carries out mixed once;
(3) the remaining fuel that accounts for total amount of fuel 70% of disposable adding in the material that mixes, and then carry out mixed once at least;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Embodiment five:
In the present embodiment, its method is:
(1) iron charge and flux are sent into proportioning room and prepare burden in proportion, add the fuel that accounts for total amount of fuel 20% simultaneously;
(2) material for preparing carries out twice mixing;
(3) the remaining fuel that accounts for total amount of fuel 80% of disposable adding in the material that mixes, and then carry out mixed once;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Embodiment six:
In the present embodiment, its method is:
(1) iron charge and flux are sent into proportioning room and prepare burden in proportion, add the fuel that accounts for total amount of fuel 10% simultaneously;
(2) material for preparing carries out mixed once;
(3) in the material that mixes, add the remaining total amount of fuel that accounts at twice greater than 90% fuel, carry out mixed once after each the adding;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Embodiment seven:
In the present embodiment, its method is:
(1) iron charge and flux are sent into proportioning room and prepare burden in proportion, add the fuel that accounts for total amount of fuel 5% simultaneously;
(2) material for preparing carries out mixed once;
(3) in the material that mixes, divide the remaining fuel that accounts for total amount of fuel 95% of adding three times, carry out mixed once after each the adding;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
Claims (5)
1. sintering heat gradient optimizing method that is used for iron and steel metallurgical industry is characterized in that: its method is,
(1) iron charge and flux are sent into proportioning room and prepare burden in proportion, add fuel simultaneously less than total amount of fuel 30%;
(2) material for preparing carries out mixed once at least;
(3) in the material that mixes, add the remaining fuel that accounts for total amount of fuel 70-100% one or more times, again carry out at least mixed once after adding fuel at every turn;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
2. the sintering heat gradient optimizing method that is used for iron and steel metallurgical industry according to claim 1 is characterized in that: its method is,
(1) iron charge and flux being sent into proportioning room prepares burden in proportion;
(2) material for preparing carries out mixed once;
(3) fuel of disposable adding whole 100% in the material that mixes, and then carry out mixed once at least;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
3. the sintering heat gradient optimizing method that is used for iron and steel metallurgical industry according to claim 1 is characterized in that: its method is,
(1) iron charge and flux being sent into proportioning room prepares burden in proportion;
(2) material for preparing carries out twice mixing;
(3) fuel of disposable adding whole 100% in the material that mixes,, and then carry out mixed once at least;
(4) material that has fuel that mixes is carried out cloth, igniting, roasting, obtain required agglomerate.
4. according to arbitrary described sintering heat gradient optimizing method that is used for iron and steel metallurgical industry among the claim 1-3, it is characterized in that: adopt drum mixer to mix during described mixing.
5. according to arbitrary described sintering heat gradient optimizing method that is used for iron and steel metallurgical industry among the claim 1-3, it is characterized in that: adopt the disk mixing machine to mix during described mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100439813A CN100379887C (en) | 2006-05-18 | 2006-05-18 | Sintering heat gradient optimizing method for iron and steel metallurgical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100439813A CN100379887C (en) | 2006-05-18 | 2006-05-18 | Sintering heat gradient optimizing method for iron and steel metallurgical industry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1851012A CN1851012A (en) | 2006-10-25 |
| CN100379887C true CN100379887C (en) | 2008-04-09 |
Family
ID=37132514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100439813A Active CN100379887C (en) | 2006-05-18 | 2006-05-18 | Sintering heat gradient optimizing method for iron and steel metallurgical industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100379887C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498046A (en) * | 2013-10-30 | 2014-01-08 | 中冶北方（大连）工程技术有限公司 | Process for mixing materials and making external-rolled coal through sintering machine |
| CN105296746B (en) * | 2014-07-30 | 2017-09-22 | 宝山钢铁股份有限公司 | A kind of method for reducing sintering solid burnup |
| CN106282542B (en) * | 2015-05-13 | 2017-12-19 | 上海梅山钢铁股份有限公司 | A kind of collaboration discharge-reducing method of sintering process multiple pollutant |
| CN108754131B (en) * | 2018-06-14 | 2020-02-18 | 鞍钢股份有限公司 | Sintering production method for optimizing fuel matching |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1016184B (en) * | 1986-12-15 | 1992-04-08 | 日本钢管株式会社 | Method for roasting ores into ball agglomeration |
| CN1025749C (en) * | 1992-03-25 | 1994-08-24 | 冶金工业部钢铁研究总院 | Method for preparing pellet sintered ore |
| WO2001092588A1 (en) * | 2000-05-29 | 2001-12-06 | Kawasaki Steel Corporation | Raw material for sintering in form of pseudo grain and method for producing the same |
-
2006
- 2006-05-18 CN CNB2006100439813A patent/CN100379887C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1016184B (en) * | 1986-12-15 | 1992-04-08 | 日本钢管株式会社 | Method for roasting ores into ball agglomeration |
| CN1025749C (en) * | 1992-03-25 | 1994-08-24 | 冶金工业部钢铁研究总院 | Method for preparing pellet sintered ore |
| WO2001092588A1 (en) * | 2000-05-29 | 2001-12-06 | Kawasaki Steel Corporation | Raw material for sintering in form of pseudo grain and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1851012A (en) | 2006-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104313308B (en) | Iron ore low-carbon sintering method | |
| JP5194378B2 (en) | Method for producing sintered ore | |
| CN108774683B (en) | A kind of high magnesium composite sinter and its production method | |
| CA1332286C (en) | Method of refining oxide nickel ore or the like | |
| CN103627895B (en) | Production method for sintering chromium powder ore by continuous strand sinter machine | |
| CN100379887C (en) | Sintering heat gradient optimizing method for iron and steel metallurgical industry | |
| CN104630404A (en) | QDF (quiescent direct furnace) direct reduction technology | |
| CN111100981B (en) | Method for improving metallurgical performance of manganese-rich slag smelted manganese sinter | |
| US4595416A (en) | Method and apparatus for producing cement clinker including white cement | |
| CN101994002B (en) | Method for sintering ore blending of Jianshan concentrate fines and limonite | |
| JP2009097027A (en) | Method for producing sintered ore | |
| CN112029991B (en) | Method for strengthening sintering of high-proportion fine-grained materials by multi-medium gas injection | |
| JP2001348623A (en) | METHOD FOR PRODUCING HIGH QUALITY AND LOW SiO2 SINTERED ORE FOR BLAST FURNACE | |
| CN102046819B (en) | Process for producing cement-bonded ore agglomerates | |
| JP2000178660A (en) | PRODUCTION OF HIGH QUALITY LOW SiO2 SINTERED ORE | |
| CN107641709A (en) | A kind of sintering method for reducing burnup | |
| JP2003129141A (en) | Sintered ore for blast furnace and manufacturing method therefor | |
| JP4982986B2 (en) | Method for producing sintered ore | |
| CN110592371A (en) | Sintering process for using large-particle extra-fine powder as sintering bedding material | |
| JPH0430442B2 (en) | ||
| CN115058589B (en) | Sinter production method for realizing cloth thickness of sintering machine reaching 950 mm-1000 mm | |
| JP2001348622A (en) | METHOD FOR PRODUCING HIGH QUALITY AND LOW SiO2 SINTERED ORE FOR BLAST FURNACE | |
| CN104445115A (en) | Preparation method of raw material phosphate ores for yellow phosphorus production | |
| CN1871365B (en) | Sintering with sinter mix enhancer | |
| JP2003277839A (en) | Method for producing calcium-ferrite for refining molten iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |