CN102041333A - Blast furnace material loading process for realizing 3-grade or 4-grade charging of sinter ore - Google Patents
Blast furnace material loading process for realizing 3-grade or 4-grade charging of sinter ore Download PDFInfo
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Abstract
The invention discloses a blast furnace material loading process for realizing 3-grade or 4-grade charging of a sinter ore, belonging to the technical field of blast-furnace iron making. The sinter ore is divided into two stages in grading by a segmentation grading manner. The first stage is the supplied material pregrading in an ore-sintering plant; and the second stage is refining grading in a blast furnace groove, thus realizing the 3-grade or 4-grade charging of the sinter ore. The process comprises the following steps: setting the charging grades as follows: I grade, II grade, III grade or IV grade, wherein, a grain size boundary between the I grade and the II grade is X, X is more than or equal to 15 and is less than or equal to 30; a grain size boundary between the II grade and the III grade is Y, wherein, Y is more than or equal to 5 and is less than or equal to 15; a III-grade minimum boundary grain size is Z, wherein, Z is more than or equal to 0 and is less than or equal to 5 or I-grade and a II-grade grain size boundary is X, wherein, X is more than or equal to 15 and is less than or equal to 30; a grain size boundary between the II grade and the III grade is Y, wherein, Y is more than or equal to 5 and is less than or equal to 15; a grain size boundary between the III grade and IV grade is W, wherein, W is more than or equal to 0 and is less than or equal to 8; and the IV-grade minimum boundary grain size is Z, wherein, Z is more than or equal to 0 and is less than or equal to 5; performing the first stage of pregrading the supplied material in the ore-sintering plant; and performing the second stage of refining grading in the blast furnace groove.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, particularly provide a kind of agglomerate of realizing to divide 3 grades or 4 grades charging of blast furnace technologies of going into stove, adopt the segmentation hierarchical approaches to realize that agglomerate divides 3 grades or 4 grades of charging of blast furnace of going into stove.
Background technology
It is the important means that air-flow distribution rationally for the third time and raising gas utilization rate were produced, promoted in realization smooth operation of furnace and " minimizing " that the stove technology is gone in the agglomerate classification.
Along with the continuous development of ironmaking technology, one of the Basic Ways of blast furnace ironmaking design implementation recycling economy and countermeasure are exactly that " minimizing " produces.So-called " minimizing " be meant under the constant condition of throughput, by taking technical measures, the resource of input and quantity of energy reduced as far as possible, thereby reach energy-conservation and reduce the purpose of quantity discharged.And " fine fodder " is the basis that " minimizing " produces.To the blast furnace fine fodder require available: " ripe ", " only ", " sparing ", " little ", " surely ", " lacking ", " good " seven aspects are expressed.And wherein " only ", " sparing ", " little " three aspects all are the requirements to crude fuel granularity aspect.
Going into stove crude fuel granularity is one of important factor that influences the blast furnace gas distributions.Gas fluid in blast furnace has three kinds of distributions: the air-flow that stove is gone in air-supply distributes; The secondary gas flow of cohesive zone distributes; Three air-flows of bulk cargo post distribute.Air-flow distributes and to depend primarily on reasonable cloth and whole grain for the third time, comprising: reasonably charging system, whole of furnace charge, screen out powder and stove is gone in classification.Have only reasonable cloth and whole grain just can reach reasonable distribution, the raising gas utilization rate of air-flow for the third time.
When not adopting classification to go into the stove technology, the agglomerate globule size differs, and grating is too tight, and powder is too much in addition, and bulk cargo post ventilation property is not good, is unfavorable for the reasonable distribution of air-flow for the third time.In order to improve ventilation property, should sieve and size classification agglomerate.Down after the screening, the breeze of granularity＜5mm returns sintering plant through groove, and quantity of return mines is about 10% (part producing factory even reach more than 15%).When adopting the agglomerate classification technique, not only can go into stove, but also improve screening efficiency by the classification of different grain size grade, the breeze amount of the Blast Furnace Ore groove of packing into is reduced, after groove sieved down, the breeze of granularity＜5mm returned sintering plant, and the powder amount of returning mine reduces to below 8%.Do like this and both realized that the agglomerate classification went into stove, by adjusting the distribution of cloth, control different grain size agglomerate, the edge air-flow is also suitably developed in the maintenance center, make the distribution of air-flow for the third time more reasonable, help the control of smooth operation of furnace and lip temperature, reduce thermosteresis, reach and reduce coke ratio and the long-lived purpose of blast furnace; Reduce quantity of return mines again, thereby reached the purpose that energy-saving and emission-reduction, resource make full use of.
At present, the agglomerate classification that each factory uses mainly is that agglomerate is divided into 2 grades of large and small granularity agglomerate, use present situation according to each factory, most of factory goes into stove granule level agglomerate and only accounts for below 10% of agglomerate total amount, its main purpose is in order to reclaim the ore deposit fourth, is not that stove is gone in truly agglomerate classification.Traditional agglomerate classification is gone into furnaceman's process flow and is mainly contained following two kinds:
1, adopt at sintering plant increase finished product sizing screen, the agglomerate finished product is in the classified sieve screening of sintering plant, and screen underflow is the breeze of granularity＜5mm, and the screen overflow finished product is large and small granularity agglomerate, transports respectively and the blast furnace sinter ore deposit groove of packing into.After the vibrating screen under groove screening, realize that agglomerate divides 2 grades to go into stove.Owing to be subjected to the restriction of transportation equipment on screening plant, raw material transportation and the blast furnace groove, the sintering plant classification of using at present only limits to agglomerate is divided into 2 kinds of granularities of large and small granularity agglomerate, is divided into 3 grades (or 4 utmost points) and then compares difficulty.
2, adopt grading technology under the blast furnace groove.Sintering plant does not have the classification operation, and the sintering plant technical process is simple relatively.The needed whole agglomerate of blast furnace are transported on the groove of blast furnace sinter ore deposit groove, and in the agglomerate groove of packing into.Sieve (once screening) through big grade sintering jig under the blast furnace groove, screen overflow is a volume particle size agglomerate finished product, and the volume particle size agglomerate weighing jar of packing into is through the weighing fed to boiler; A large amount of screen underflow agglomerate need to sieve (regrading) through granule level sintering jig through the secondary treatment operation under agglomerate groove groove, and screen overflow is a small grain size agglomerate finished product, and the small grain size of packing into agglomerate weighing jar is through the weighing fed to boiler; Screen underflow is the breeze of granularity＜5mm, returns sintering plant.The fractionated technical process is longer under the blast furnace groove, and the secondary treatment amount is bigger, and secondary breaking causes quantity of return mines to increase.Classification also only limits to agglomerate is divided into 2 grades of large and small granularity agglomerate under the blast furnace groove of using at present.
3, along with blast furnace maximizes, agglomerate divides 2 grades to go into the demand that stove can not satisfy production, designs a kind of agglomerate of realizing and divides 3 grades (or 4 grades) to go into the charging of blast furnace system of stove, and this is the new problem of pendulum in face of us.
Summary of the invention
The purpose of this patent is to provide a kind of agglomerate of realizing to divide 3 grades or 4 grades charging of blast furnace technologies of going into stove, adopt the segmentation hierarchical approaches to realize that agglomerate divides 3 grades or 4 grades of charging of blast furnace of going into stove, the core of this technology is to adopt the segmentation hierarchical approaches that the agglomerate classification is divided into two stages to carry out, and the fs is the pre-classification of sintering plant supplied materials; Subordinate phase is refinement classification under the blast furnace groove, realizes that agglomerate divides 3 grades or 4 grades to go into stove.
If going into stove progression is respectively: when dividing 2 grades to go into stove, I level, II level and II level, I level, II level granularity line of delimitation are X, 15≤X≤30; II level and III level boundary granularity are Y, 5≤Y≤15; The minimum boundary of III level granularity is Z, 0≤Z≤5; Be that I level granularity is＞Xmm, II level granularity is X-Y, and III level granularity is Z-Y.When dividing 4 grades to go into stove, I level, II level granularity line of delimitation are X, 15≤X≤30; II level and III level boundary granularity are Y, 5≤Y≤15; III level and IV level boundary granularity are W, 0≤W≤8, and the minimum boundary of IV level granularity is Z, 0≤Z≤5; Be that I level granularity is＞Xmm, II level granularity is X-Y, and III level granularity is Y-W, and IV level granularity is W-Z.
1, the pre-classification of fs sintering plant supplied materials:
(1) the pre-classification of sintering plant supplied materials is exactly at sintering plant the agglomerate finished product to be divided in advance the agglomerate of 2 kinds of (or a kind, 3 kinds) granularities; Agglomerate is respectively charged in the corresponding agglomerate groove through the screen overflow finished product after the bolting; And screen underflow is a breeze, returns sintering plant breeze storehouse;
To divide 3 grades of a kind of embodiments of going into stove is example, and the pre-classification of sintering plant supplied materials is exactly the agglomerate that the agglomerate finished product is divided in advance two kinds of granularities at sintering plant.If Xmm is the classification boundary line of these two kinds of granularity agglomerate, then agglomerate is to remove the granularity＞Xmm behind the breeze and the agglomerate of two kinds of granularities of granularity≤Xmm through the screen overflow finished product after the bolting, is respectively charged in the corresponding agglomerate groove; And screen underflow is a breeze, returns sintering plant breeze storehouse.
(2) determine the foundation of the gradational boundary Xmm of the pre-classification granularity of sintering plant supplied materials.The one, to follow with the sintering plant supplied materials and be classified as the master in advance, refinement is classified as auxilliary principle under the blast furnace groove.Such as: with the super-huge blast furnace of certain company is example, and the expection of blast furnace production is that agglomerate divides 3 grades to go into stove, and I level granularity is:＞20 (X=20) mm, II level granularity is: (III level granularity is 20-10 for X=20, Y=10) mm: 10-3 (Y=10, Z=3) mm.Granularity Detection result according to the agglomerate that the said firm's sintering plant is produced, the size composition of going into the stove agglomerate is: I level granularity＞20mm accounts for 40%, II level granularity 20-10mm accounts for 40%, III level granularity 10-3mm accounts for 20%, as seen to account for agglomerate total amount per-cent bigger for I level and II level, nearly 80%, therefore with gradational boundary 20 (X) mm of I level and two grades of II level as fractionated size classification boundary line in advance.After sintering jig screening under the groove (once screening), screen overflow is the agglomerate finished product that accounts for into I level and two grades of II level of stove agglomerate total amount 80%, and screen underflow through transhipment after the corresponding agglomerate groove of packing into after the refinement classification sintering jig screening (regrading) under the groove, the secondary treatment amount only is about 20%.The 2nd, the size range of sintering mill (plant) grate-layer material also should be taken into account in the pre-fractionated size classification of sintering plant supplied materials boundary line.Because the size range of sintering plant grate-layer material is 10-20 (mm), the granularity upper limit of grate-layer material is that 20mm is identical with pre-fractionated size classification boundary line, can optimize sintering plant and raw material transportation operation like this.
(3) the pre-classification of sintering plant supplied materials is not limited to agglomerate is divided into two kinds of granularities, the pre-fractionated grain size category of agglomerate depends on the screen cloth number of plies of sizing screen, every increase one deck screen cloth can increase a grade, therefore supplied materials is presorted level to be divided into two or more granularities also is feasible, and it is more simple and practical to be divided into two kinds of size ratios at present.
2, refinement classification under the subordinate phase blast furnace groove:
(1) the refinement fractionated the first step is that the agglomerate of finishing after the pre-classification 2 (or 1,3) grades is gone into stove under the blast furnace groove.
To divide 3 grades of a kind of embodiments of going into stove is example, and the refinement fractionated the first step is that to finish with Xmm be that the agglomerate of two grades after the pre-classification of gradational boundary is gone into stove promptly under the blast furnace groove: two grade agglomerate of I level and II level are gone into stove.The agglomerate of the two kinds of interior granularities of corresponding agglomerate groove of having packed into after the pre-classification of supplied materials is after sintering jig screening under the groove (once screening), the screen overflow finished product is the agglomerate of I level and two grades of II level, I level granularity is:＞Xmm (agglomerate that contains minute quantity X-Ymm of secondary breaking under groove), II level granularity is: X-Ymm, the agglomerate of I level and II level granularity directly enters the weighing jar, finishes the I level and two grade agglomerate of II level (the 1st, 2 grade) are gone into furnaceman's preface by the material loading program.
(2) second step of refinement fractionated is to finish the undersized agglomerate classification of the first step to go into stove under the blast furnace groove.
After the sintering jig once sieves under the groove in the above-mentioned the first step, screen underflow be granularity≤Ymm (or≤X, ≤ Z) agglomerate, through under transhipment and the groove once more behind the refinement classification sintering jig regrading, the screen overflow finished product is further divided into the agglomerate of 1 or 2 granularity, return in the corresponding agglomerate groove, the agglomerate of this 1 or 2 granularity enters the weighing jar and finishes the preface into furnaceman by the material loading program; Screen underflow is the breeze of granularity≤Zmm, and the breeze of≤Zmm returns sintering plant by the blast furnace facility of returning mine.
3, the relation in two stages
Be classified as the master in advance with the sintering plant supplied materials, refinement is classified as auxilliary under the blast furnace groove.By the pre-classification of supplied materials agglomerate is divided into volume particle size and two kinds of granularities of small grain size in advance, realizes that through refinement classification under the blast furnace groove agglomerate divides 3 grades (perhaps 4 grades) to go into stove again.The secondary treatment amount of returning ore deposit agglomerate groove under the blast furnace groove after the refinement classification, transhipment number of times and the secondary breaking amount that reduces refinement classification operation under the groove be can reduce like this, shortened process, energy-saving and emission-reduction helped.
4, the annexation in two stages
The middle-chain that connects two stages is blast furnace sinter ore deposit groove.The pre-classification of fs sintering plant supplied materials must be finished before agglomerate enters blast furnace sinter ore deposit groove.The agglomerate of two kinds of granularities is transported on the groove groove of blast furnace sinter ore deposit by raw material haulage system and is respectively charged in the corresponding agglomerate groove after the pre-classification of supplied materials; The refinement classification is to finish under the groove groove of blast furnace sinter ore deposit under the subordinate phase blast furnace groove.Agglomerate in the agglomerate groove of the two kinds of granularities of having packed into is after equipment screening under the groove, the agglomerate finished product is divided into 3 (or 4) grades, the agglomerate of each grade is respectively charged into corresponding weighing jar again, after weighing, realizes that by the charging of blast furnace system program agglomerate divides 3 grades (or 4 grades) to go into stove.
5, above-mentioned supplied materials is divided into the two-stage granularity in advance, under the groove again the refinement method of telling the one-level granularity be about adopting the segmentation hierarchical approaches to realize that agglomerate divides 3 grades of elaborations of going into stove, the present invention is not limited to this, the present invention has diversified expansion and derives.
(1) adopt the segmentation hierarchical approaches, the fs: the pre-classification of sintering plant supplied materials is not limited to two kinds of granularities, can realize 3 kinds of granularities; Subordinate phase: the refinement classification is not limited to and finishes I level, II level, 3 grade agglomerate of III level and go into stove under the blast furnace groove, can also realize that I level, II level, III level and 4 grade agglomerate of IV level go into stove.Optimum combination (seeing Table 1) by two stages can realize that agglomerate divides 3 grades (or 4 grades) to go into stove.Only set forth employing B3 array mode and realize that agglomerate divides 3 grades to go into stove for above-mentioned the 1st, 2,3,4, adopted more array configuration A3, C3 can realize that also agglomerate divides 3 grades to go into stove, and B4, C4 can realize that agglomerate goes into stove for 4 grades.
Table one 1
B3 in the table one, C4 belong to scope involved in the present invention, are the designs of optimizing.This patent has elaborated the specific embodiments of B3.
The B3-fs presorts: 2 grades, and subordinate phase segmentation: the 2+1 level, promptly the sintering plant supplied materials is presorted level and is divided into 2 grades, is divided into two kinds of granularities, and screen overflow is directly into stove, and screen underflow enters refinement classification under the blast furnace groove, can realize that agglomerate divides 3 grades to go into stove;
The C4-fs presorts: 2 grades, and subordinate phase segmentation: the 2+2 level, can realize that agglomerate goes into stove for 4 grades;
A3 in the table, C3, B4 belong to the related scope of this patent, are applicable to the occasion of special requirement, such as: total figure arrangement constraints, Jiu Chang change, extension project etc. can not be adopted the occasion of B3, C4 array mode.
The A3-fs presorts: 3 grades, and the subordinate phase segmentation: the 3+0 level, can realize that agglomerate divides 3 grades to go into stove;
The B4-fs presorts: 3 grades, and subordinate phase segmentation: the 3+1 level, can realize that agglomerate goes into stove for 4 grades;
The C3-fs presorts: 1 grade, and the subordinate phase segmentation: the 1+2 level, can realize that agglomerate divides 3 grades to go into stove;
(2) the sintering plant supplied materials is classified as the feasibility elaboration of (combination code name: A3, B4 fs) of 3 kinds of granularities in advance: if thereby set up agglomerate finished product intermediate buffering storehouse or increase screening plant increase finished product grade quantity, increase to the transportation equipment quantity on the Top of Blast Furnace Ore Tank simultaneously, the sintering plant supplied materials is presorted level to be divided into 3 kinds of granularities also is feasible so.But do sintering plant and raw material haulage system like this and become comparatively complicated, technical process is long, be unfavorable for " minimizing " production and energy-saving and emission-reduction, be not suitable for " short flow process " processing set-up, be only applicable to the occasion that total figure layout is restricted, old factory changes, extends special requirements such as making.
When (3) the sintering plant supplied materials was classified as 3 kinds of granularities in advance, the refinement fractionated the first step can be finished I level, II level, 3 grade agglomerate of III level and goes into stove under the blast furnace groove; Second step of cancellation can realize that agglomerate divides 3 grades to go into stove.
When (4) the sintering plant supplied materials was classified as 3 kinds of granularities in advance, the refinement fractionated the first step can be finished I level, II level, 3 grade agglomerate of III level and goes into stove under the blast furnace groove; Second step finished IV level (the 4th grade) agglomerate and goes into stove.Can realize that agglomerate goes into stove for 4 grades.
(5) supplied materials has only a kind of granularity during not classification of sintering plant, and the refinement fractionated the first step can be finished I level (the 1st grade) agglomerate and goes into stove under the blast furnace groove; Second step was finished the II level, 2 grades of III level (the 2nd, 3 grade) agglomerate is gone into stove.Can realize that also agglomerate divides 3 grades to go into stove.
When (6) the sintering plant supplied materials was classified as 2 kinds of granularities in advance, the refinement fractionated the first step was identical with 4 (1) under the blast furnace groove, finished the agglomerate of two grades of I level and II level (the 1st, 2 grade) and went into stove; Second step of refinement fractionated is that stove is gone in the classification of finishing the agglomerate of granularity≤Ymm under the blast furnace groove.After the sintering jig sieves (once screening) under the groove in the refinement fractionated the first step under the blast furnace groove, screen underflow is the agglomerate of granularity≤Ymm, after refinement classification sintering jig (can adopt double deck screen or two vibratory screening apparatuss) carries out regrading under transhipment and the groove once more, the screen overflow finished product is the agglomerate of III level and two grades of IV level, if the boundary granularity of III and IV level is W (0≤W≤8), the minimum boundary granularity of IV level is Z (0≤Z≤5), then III level granularity is: Y-Wmm, IV level granularity is: W-Zmm, in its corresponding agglomerate groove of packing into, the III level, the agglomerate of two grades of IV level enters the weighing jar by the material loading program, finishes III level and two grades the (the 3rd of IV level by the material loading program, 4 grades) agglomerate is gone into furnaceman's preface; Screen underflow is the breeze of granularity≤Zmm, and breeze returns sintering plant by the blast furnace facility of returning mine.The realization agglomerate is gone into stove for 4 grades.
6, about gradational boundary X, Y, Z, the explanation of W numerical value: the user can form and the production requirement adjustment X of blast furnace material distribution according to the actual grain size of each factory's agglomerate in specific implementation process, Y, Z, the value of W realizes the demand of multiple granularity division.
Realize that the technological core main points that agglomerate divides 3 grades (or 4 grades) to go into the feeding system of stove are:
1, adopt the segmentation hierarchical approaches that the agglomerate classification is divided into two stages and carry out, the fs is the pre-classification of sintering plant supplied materials; Subordinate phase is refinement classification under the blast furnace groove.
2, the pre-classification of sintering plant supplied materials:
(1) the pre-classification of sintering plant supplied materials is exactly at sintering plant agglomerate to be divided into the agglomerate of two kinds of granularities of granularity＞Xmm and granularity≤Xmm in advance, is respectively charged in the groove of corresponding blast furnace sinter ore deposit;
(2) determine the foundation of the pre-fractionated size classification boundary line X of sintering plant supplied materials.Should be classified as the master in advance according to the sintering plant supplied materials, refinement is classified as auxilliaryly under the blast furnace groove, takes into account the principle of the size range of sintering mill (plant) grate-layer material.
3, refinement classification under the blast furnace groove:
(1) the refinement fractionated the first step is that to finish with Xmm be that the agglomerate of two grades after the pre-classification of gradational boundary is gone into stove promptly under the blast furnace groove: two grade agglomerate of I level and II level (the 1st, 2 grade) are gone into furnaceman's preface.
(2) second step of refinement fractionated is that the classification of finishing the agglomerate of granularity≤Ymm is gone into stove promptly under the blast furnace groove: III level (the 3rd grade) agglomerate is gone into furnaceman's preface;
4, foregoing realizes that for adopting the segmentation hierarchical approaches agglomerate divides 3 grades of elaborations of going into stove, and this patent is not limited to this, and this patent has diversified expansion and derives.
(1) adopt the segmentation hierarchical approaches, the fs: the pre-classification of sintering plant supplied materials is not limited to two kinds of granularities, can realize 3 kinds of granularities; Subordinate phase: the refinement classification is not limited to and finishes I level, II level, 3 grade agglomerate of III level and go into stove under the blast furnace groove, can realize that also I level, II level, III level and 4 grade agglomerate of IV level go into stove.Combination by two stages can obtain agglomerate and divide 3 grades (or 4 grades) to go into the multiple embodiments of stove.
(2) granularity after the refinement classification under the blast furnace groove: I level granularity is:＞X, II level granularity is: X-Y, III level granularity is: Y-W, IV level granularity is: W-Z.X, Y, W, the unit of Z is mm, value is not limited to some concrete numerical value.The user can adjust X according to the size composition of each factory's agglomerate reality and the production requirement of blast furnace material distribution in the specific implementation process, Y, and Z, the value of W realizes the demand of multiple granularity division.
5, the present invention is not limited to some specific embodiments, does not anyly break away from this patent mentality of designing, does that unsubstantiality changes, and all still belongs to the scope of this patent.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.Volume particle size agglomerate Distribution Warehouse conveyor drive 1, small grain size agglomerate Distribution Warehouse conveyor drive 2, volume particle size agglomerate groove 3, small grain size agglomerate groove 4, III level agglomerate groove 5, III level agglomerate Distribution Warehouse conveyor drive 6, III level agglomerate surge bunker 7, transhipment conveyor drive 8, breeze storehouse 9, secondary classification sintering jig 10, weighing jar 11, sintering jig 12, weighing jar 13, recovery conveyor drive 14, N2 conveyor drive 15, N1 master's conveyor drive 16, sintering plant supplied materials sizing screen 17.
Embodiment
Fig. 1 is one of the specific embodiment of the present invention, adopts the segmentation hierarchical approaches to realize 3 grades of technical process of going into stove.Have the partition size grade and can reach that 3 grades, partition size scope can be adjusted flexibly, wide accommodation characteristics such as (both adapted to conventional process flow and also adapted to " short flow process "), meet the production theory and " fine fodder " policy of " minimizing " that the ironmaking designing institute carries out.
The present invention adopts the segmentation hierarchical approaches that the agglomerate classification is divided into two stages to carry out, and the fs is the pre-classification of sintering plant supplied materials; Subordinate phase is refinement classification under the blast furnace groove, realizes that agglomerate divides 3 grades to go into stove.X=20 in this embodiment, Y=10, Z=3.
1, the pre-classification of sintering plant supplied materials.The agglomerate that the agglomerate finished product is divided in advance two kinds of granularities at sintering plant.After then agglomerate sieved through pre-classification vibratory screening apparatus 17, screen underflow was the breeze of granularity＜3mm, returns sintering plant breeze storehouse; The screen overflow finished product is the agglomerate of volume particle size＞20mm and two kinds of granularities of small grain size≤20mm, through the transhipment of raw material haulage system, volume particle size agglomerate Distribution Warehouse conveyor drive 1 and small grain size agglomerate Distribution Warehouse conveyor drive 2 on Top of Blast Furnace Ore Tank are respectively charged in the corresponding agglomerate groove; And agglomerate Distribution Warehouse conveyor drive need be established 2 for this reason.Respectively the agglomerate of granularity＞20 (X) mm is packed into M volume particle size agglomerate groove 3 (feed bin numbering:＞X) in; The agglomerate of granularity≤20 (X) mm pack into N small grain size agglomerate groove 4 (feed bin numbering :≤X) in.(M N) should determine M=5 in the present embodiment, N=5 in conjunction with the practical situation that each factory produces for the useful volume of two kinds of granularity agglomerate ore deposit grooves and quantity.
2, refinement classification under the blast furnace groove.The small grain size agglomerate groove 4 (N altogether) of the volume particle size agglomerate groove 3 of granularity in the present embodiment＞20 (X) mm (M altogether) and granularity≤20 (X) mm can be that single layout also can be to be arranged side by side.
(1) under the blast furnace groove refinement fractionated the first step be finish the I level, two grade agglomerate of II level are gone into stove.The agglomerate of the two kinds of granularities in corresponding volume particle size agglomerate groove 3 and the small grain size agglomerate groove 4 of having packed into after the pre-classification of supplied materials is after sintering jig screening under the groove, the screen overflow finished product is the agglomerate of I level and two grades of II level, I level granularity is:＞20 (X) mm (agglomerate that contains 20-10 (X-Y) mm of minute quantity secondary breaking under groove), II level granularity is: 20-10 (X-Y) mm.The agglomerate of I level and two grades of II level directly enters in the weighing jar 13, after the weighing, presses charging procedure to N2 conveyor drive 15 blowings.N2 conveyor drive 15 is transported to agglomerate on N1 master's conveyor drive 16, finishes to the charging of blast furnace furnace roof hopper, and the agglomerate of two grades of I level and II level (the 1st, 2 grade) is gone into stove.
(2) second step of refinement fractionated is that the agglomerate of finishing III level (the 3rd grade) is gone into stove under the blast furnace groove.Screen underflow under the above-mentioned groove after the screening of sintering jig is the agglomerate of granularity≤10 (Y) mm, be transported to sintering secondary classification sintering jig 10 through reclaiming conveyor drive 14, the screen overflow finished product is the agglomerate of III level (the 3rd grade), III level granularity is 10-3 (Y-Z) mm, through III level agglomerate Distribution Warehouse conveyor drive 6, the III level of packing into agglomerate groove 5 (P altogether).III level (the 3rd grade) agglomerate is packed into by the material loading program in the weighing jar 11, after the weighing, presses charging procedure to N2 conveyor drive 15 blowings.N2 conveyor drive 15 is transported to agglomerate on N1 master's conveyor drive 16, finishes to the charging of blast furnace furnace roof hopper, and the agglomerate of III level (the 3rd grade) is gone into stove.The screen underflow of secondary classification sintering jig is≤breeze of 3mm, be stored in outward transport then in the breeze storehouse 9.The useful volume of III level granularity agglomerate groove and quantity (P) should be determined P=2 in the present embodiment in conjunction with the practical situation that each factory produces.
3, the present invention is not limited to above-mentioned embodiment, also has multiple embodiments.More be adapted to the kinds of processes arrangement form.
When (1) sintering plant supplied materials sizing screen 17 was single-deck screen, can supplied materials be presorted at sintering plant was the agglomerate of two kinds of granularities; When changing supplied materials sizing screen 17 into double deck screen or two-stage screening, can supplied materials be presorted at sintering plant is the agglomerate of 3 kinds of granularities.
(2) according to total figure arrangement requirement, cancellation N2 conveyor drive 15 is arranged under the groove N1 master's conveyor drive 16 afterbody material feeding sections, and the blowing gate under weighing jar 11 and the weighing jar 13 can be directly to N1 master's conveyor drive 16 blowings, finish to the charging of blast furnace furnace roof hopper, realize that agglomerate divides 3 grades (or 4 grades) to go into stove.
(3) being adapted to promptly that relay station also is adapted to is the processing set-up at non-relay station.N2 conveyor drive 15 can be established transfer point to 16 transhipments of N1 master's conveyor drive, also can establish relay station.When adopting the processing set-up at non-relay station, establish transfer point, N2 conveyor drive 15 is directly to the afterbody blowing of N1 master's conveyor drive 16, and N1 master's conveyor drive 16 is finished to blast furnace furnace roof hopper and feeded; When employing had the processing set-up of relay station, the concentrated weighing jar blowing of N2 conveyor drive 15 in being arranged in relay station by the afterbody blowing of shaft furnace charging program requirement to N1 master's conveyor drive 16, feeded to the furnace roof hopper after weighing again.
(4) according to different processing set-up requirements, III level agglomerate surge bunker 7 (ore deposit groove numbering Z-Y ') can be cancelled, the III level agglomerate III level agglomerate (ore deposit groove numbering Z-Y) of can directly packing into.
(5) on the storehouse, under the storehouse equipment configuration by processing requirement and difference:
4, the invention provides a kind of employing segmentation hierarchical approaches and realize that agglomerate divides 3 grades (or 4 grades) to go into the feeding system of stove.Comprise also and do not break away from the diversified expansion of essence of the present invention and more accordingly embodiments of deriving that elaboration in the embodiment and the accompanying drawing explanation usefulness that only lays down a definition not is limitation of the present invention.Anyly do not break away from this patent mentality of designing, do that unsubstantiality changes, all still belong to scope of the present invention.
Claims (2)
1. realize that agglomerate divides 3 grades or 4 grades charging of blast furnace technologies of going into stove, is characterized in that for one kind: adopt the segmentation hierarchical approaches that the agglomerate classification is divided into two stages and carry out, the fs is the pre-classification of sintering plant supplied materials; Subordinate phase is refinement classification under the blast furnace groove, realizes that agglomerate divides 3 grades or 4 grades to go into stove;
If going into stove progression is respectively: when dividing 2 grades to go into stove, I level, II level and II level, I level, II level granularity line of delimitation are X, 15≤X≤30; II level and III level boundary granularity are Y, 5≤Y≤15; The minimum boundary of III level granularity is Z, 0≤Z≤5; Be that I level granularity is＞Xmm, II level granularity is X-Y, and III level granularity is Z-Y.When dividing 4 grades to go into stove, I level, II level granularity line of delimitation are X, 15≤X≤30; II level and III level boundary granularity are Y, 5≤Y≤15; III level and IV level boundary granularity are W, 0≤W≤8, and the minimum boundary of IV level granularity is Z, 0≤Z≤5; Be that I level granularity is＞Xmm, II level granularity is X-Y, and III level granularity is Y-W, and IV level granularity is W-Z;
The pre-classification of fs sintering plant supplied materials:
The pre-classification of sintering plant supplied materials is exactly the agglomerate that the agglomerate finished product is divided in advance 2 kinds or a kind or 3 kinds granularities at sintering plant; Agglomerate is respectively charged in the corresponding agglomerate groove through the screen overflow finished product after the bolting; And screen underflow is a breeze, returns sintering plant breeze storehouse;
Refinement classification under the subordinate phase blast furnace groove:
(1) the refinement fractionated the first step is that the agglomerate of finishing 2 or 1 or 3 grades after the pre-classification is gone into stove under the blast furnace groove;
The agglomerate of the two kinds of interior granularities of corresponding agglomerate groove of having packed into after the pre-classification of supplied materials is after the sintering jig once sieves under the groove, the screen overflow finished product is the agglomerate of 2 or 1 or 3 grades, directly enter the weighing jar, finish these 2 or 1 or 3 grade agglomerate are gone into furnaceman's preface by the material loading program;
(2) second step of refinement fractionated is to finish the undersized agglomerate classification of the first step to go into stove under the blast furnace groove;
After the sintering jig once sieves under the groove in the above-mentioned the first step, screen underflow be granularity≤Ymm or≤X or≤agglomerate of Z, through under transhipment and the groove once more behind the refinement classification sintering jig regrading, the screen overflow finished product is further divided into the agglomerate of 1 or 2 granularity, return in the corresponding agglomerate groove, the agglomerate of this 1 or 2 granularity enters the weighing jar and finishes the preface into furnaceman by the material loading program; Screen underflow is the breeze of granularity≤Zmm, and the breeze of≤Zmm returns sintering plant by the blast furnace facility of returning mine.
2. technology according to claim 1 is characterized in that,
The annexation in two stages is: the middle-chain that connects two stages is blast furnace sinter ore deposit groove, and the pre-classification of fs sintering plant supplied materials must be finished before agglomerate enters blast furnace sinter ore deposit groove; The agglomerate of two kinds of granularities is transported on the groove groove of blast furnace sinter ore deposit by raw material haulage system and is respectively charged in the corresponding agglomerate groove after the pre-classification of supplied materials; The refinement classification is to finish under the groove groove of blast furnace sinter ore deposit under the subordinate phase blast furnace groove, agglomerate in the agglomerate groove of the two kinds of granularities of having packed into is after equipment screening under the groove, the agglomerate finished product is divided into 3 or 4 grades, the agglomerate of each grade is respectively charged into corresponding weighing jar again, after weighing, realize that by the charging of blast furnace system program agglomerate divides 3 grades or 4 grades to go into stove.
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| CN102321798A (en) * | 2011-10-18 | 2012-01-18 | 武汉钢铁(集团)公司 | Sinter grading charging method |
| CN102679740A (en) * | 2012-06-04 | 2012-09-19 | 云南建水锰矿有限责任公司 | Distributing equipment, combined distributing equipment and distributing method thereof |
| CN102978313A (en) * | 2012-12-25 | 2013-03-20 | 中冶北方（大连）工程技术有限公司 | Sinter feeding system and method for improving burden distribution of blast furnace |
| CN103146860A (en) * | 2013-03-15 | 2013-06-12 | 郑州大学 | Fully-automatic detection control method for granularities of blast furnace fed burdens |
| CN104313215A (en) * | 2014-11-19 | 2015-01-28 | 中冶南方工程技术有限公司 | Blast furnace sinter graded feeding technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102321798A (en) * | 2011-10-18 | 2012-01-18 | 武汉钢铁(集团)公司 | Sinter grading charging method |
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| CN102679740B (en) * | 2012-06-04 | 2014-10-15 | 云南建水锰矿有限责任公司 | Distributing equipment, combined distributing equipment and distributing method thereof |
| CN102978313A (en) * | 2012-12-25 | 2013-03-20 | 中冶北方（大连）工程技术有限公司 | Sinter feeding system and method for improving burden distribution of blast furnace |
| CN103146860A (en) * | 2013-03-15 | 2013-06-12 | 郑州大学 | Fully-automatic detection control method for granularities of blast furnace fed burdens |
| CN103146860B (en) * | 2013-03-15 | 2014-08-20 | 郑州大学 | Fully-automatic detection control method for granularities of blast furnace fed burdens |
| CN104313215A (en) * | 2014-11-19 | 2015-01-28 | 中冶南方工程技术有限公司 | Blast furnace sinter graded feeding technology |
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| CN102041333B (en) | 2012-06-27 |
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