CN116747756A - Ore batching method and system based on port - Google Patents
Ore batching method and system based on port Download PDFInfo
- Publication number
- CN116747756A CN116747756A CN202310933524.5A CN202310933524A CN116747756A CN 116747756 A CN116747756 A CN 116747756A CN 202310933524 A CN202310933524 A CN 202310933524A CN 116747756 A CN116747756 A CN 116747756A
- Authority
- CN
- China
- Prior art keywords
- port
- raw materials
- mixing
- bins
- bin
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 115
- 238000002156 mixing Methods 0.000 claims abstract description 102
- 239000000463 material Substances 0.000 claims abstract description 59
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 25
- 239000002245 particle Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/2201—Control or regulation characterised by the type of control technique used
- B01F35/2206—Use of stored recipes for controlling the computer programs, e.g. for manipulation, handling, production or composition in mixing plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/716—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components
- B01F35/7164—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components the containers being placed in parallel before contacting the contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/60—Loading or unloading ships
- B65G67/606—Loading or unloading ships using devices specially adapted for bulk material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/45—Mixing in metallurgical processes of ferrous or non-ferrous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a port-based ore batching method and a port-based ore batching system, wherein the port-based ore batching method comprises the following steps: unloading various raw materials on the loading ship to a port yard and stacking to form a plurality of raw material piles; taking out various raw materials from a port yard and conveying the raw materials to various different storage bins for storage; the raw materials in each bin are discharged to conveying equipment according to a preset proportion to form primary mixing, and then are transferred to a plurality of intermediate buffer bins for material separation; and discharging quantitative mixture from the intermediate buffer bin, removing impurities, and performing strong mixing and discharging. The ore batching method and system based on the port disclosed by the invention realize the purpose of uniformly mixing raw materials, the raw materials are unloaded from the port to storage, primary mixing and strong mixing transfer are all completed on the port, the port is changed from the existing storage-transfer function to the storage-mixing-transfer function, the port value is improved, the construction of secondary material yards of iron and steel enterprises is canceled, and the occupied area and investment operation cost of iron and steel production are reduced.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy mixing, in particular to an ore batching method and system based on ports.
Background
Iron ore raw materials are mixed uniformly to form an important component part in a steel plant, and the raw materials are mixed uniformly in a mixing chamber according to a certain proportion, and then mixed, sintered and smelted to form finished steel. In the steel production process, the mixing is an important process. The stability of the raw material components has great significance for the forward running of the blast furnace and the iron and coke increasing, and the mixing work is a prerequisite for high quality, high yield and low consumption of the blast furnace and is a premise for obtaining high-quality steel.
At present, general raw material ores are unloaded at ports and transported to steel enterprises for mixing after being transported, so that the steel enterprises need to build secondary material yards (storage yards and mixing yards) and also need to build closed plants in a matched mode and configure large stacking and taking equipment to stack and take materials, and the enterprise material yards are large in occupied area and high in production cost.
In view of the above, there is a need for a port-based ore batching method and system that overcomes the above-mentioned drawbacks.
Disclosure of Invention
The invention mainly aims to provide a port-based ore batching method and a port-based ore batching system, and aims to solve the problems of large occupied area and high production cost caused by the fact that an iron and steel enterprise needs to build a secondary material field because the traditional raw ore is transported to the enterprise at a port.
In order to achieve the above object, the present invention provides a port-based ore batching method, comprising the steps of:
s1, unloading various raw materials on a loading ship to a port yard and stacking to form a plurality of raw material piles;
s2, taking out various raw materials from the port yard and conveying the raw materials to various different storage bins for storage;
s3, discharging raw materials in each bin to conveying equipment according to a preset proportion to form preliminary mixing, and then transferring the raw materials to a plurality of intermediate buffer bins for material separation;
s4, discharging quantitative mixture from the intermediate buffer bin, and performing strong mixing and discharging after impurity removal.
Preferably, in S1, each raw material is stacked in a yard by a step-and-scale stacking method, where the step-and-scale stacking method is as follows:
and stacking the raw materials for a plurality of times along a stacking field, forming small stacks again at each stack gap of the raw materials, sequentially stacking the raw materials to form a plurality of small stacks along the expected length and width directions of the stacks after the stacking point of the bottom layer of the raw materials is determined, and sequentially stacking the upper layer of the raw materials at the two stacks gaps of the lower layer of the stacks until the stacks are finished to the uppermost layer to form a raw material stack.
Preferably, S3 comprises the steps of,
s31, detecting the moisture value of various raw materials in the conveying process;
s32, comparing the detected moisture value with a moisture preset value, and judging whether the detected moisture value is higher or lower than the preset value;
and S33, if so, starting the automatic fine adjustment proportioning to control the discharge amount of each bin, and if not, continuously discharging the bins according to the preset proportioning.
Preferably, S4 comprises the steps of,
s41, detecting TFe and SiO of the mixture after intensive mixing 2 、Al 2 O 3 Component values of (2);
s42, detecting TFe and SiO 2 、Al 2 O 3 The component value and the preset TFe, siO 2 、Al 2 O 3 Comparing the component values, and judging whether the component values are higher or lower than a preset value;
s43, if so, starting the automatic fine adjustment proportioning to control the discharge amount of each bin, and if not, continuously discharging the bins according to the preset proportioning.
The automatic fine adjustment ratio comprises an ore blending model, and the ore blending model is as follows:
minG＝P 1 ·C 2 +P 2 ·C 2 +···+P j ·C j +···+P k ·C k ···+P n ·C n
wherein: p (P) j (j=1, 2, …, n) is the mass percent of iron ore feed j, where 1,2, …, n represents different iron ore feeds; c (C) j (j=1, 2, …, n) is the unit price of each raw material, meta/t; g is the total cost of the iron ore raw material, meta/t.
Preferably, a test delay is also set in the moisture detection process, the detected raw material moisture data is continuously higher or lower and exceeds a set delay test value, and the automatic fine adjustment proportioning is started.
Preferably, the automatic fine adjustment proportioning is started when the detected moisture data is greater than or less than 0.3-0.8 of the moisture preset value.
The invention further provides an ore batching system based on the port, which comprises a feeding system, a primary mixing system and a strong mixing system, wherein the feeding system is used for discharging raw materials from a loading ship to a port yard, the primary mixing system is used for carrying out primary mixing according to a preset proportion after classifying and storing the raw materials, and the strong mixing system is used for carrying out strong mixing on the mixed materials after primary mixing and then conveying the mixed materials out.
Preferably, the loading system comprises a ship unloader, a stacker-reclaimer and a loading conveyor, wherein the ship unloader is connected with a loading ship and a port yard, and the stacker-reclaimer is used for unloading raw materials on the ship unloader to the port yard and transporting the raw materials on the port yard to the primary mixing system;
the primary mixing system comprises a plurality of bins, disc feeders, belt scales and a primary mixing conveyor, wherein the bins are connected with the feeding conveyor, each bin is connected with one disc feeder and the belt scale, raw materials discharged from each bin are screened by the disc feeder and then discharged to the corresponding belt scale, and the belt scale discharges the raw materials to the strong mixing system according to a preset proportion;
the high-intensity mixing system comprises an intermediate buffer bin, a feeder, a sundry sieve, a powerful mixer and a discharging conveyor, wherein the intermediate buffer bin is arranged at the downstream of the primary mixing conveyor, mixed materials conveyed by the primary mixing conveyor are discharged to the intermediate buffer bin, and the materials sequentially pass through the feeder, the sundry sieve and the powerful mixer and then are discharged to the discharging conveyor.
Preferably, a plurality of bins are arranged side by side in sequence along the conveying channel of the feeding conveyor.
Compared with the prior art, the ore batching method and system based on the port provided by the invention have the following beneficial effects:
according to the ore batching method and system based on the port, raw materials are unloaded to a port yard pile for storage, different raw materials are conveyed to various bins erected on the port for classification, the bins are discharged to conveying equipment for premixing according to different preset proportions, and then mixed materials are discharged to a plurality of middle buffering bins for distribution, so that quantitative mixed materials are discharged to a strong mixer for strong mixing, the purpose of mixing the raw materials is achieved, the purpose of unloading the raw materials to storage, primary mixing and strong mixing transition of the raw materials from the port is achieved on the port, the port is changed from the existing storage-transition function to the storage-mixing-transition function, the port value is greatly improved, the construction of secondary yards of steel enterprises can be canceled, and the occupation area and investment cost of steel production are greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a port-based ore batching method provided by the invention;
FIG. 2 is a schematic diagram of a port-based ore batching system according to the present invention;
FIG. 3 is a diagram showing the configuration of the port-based ore batching system shown in FIG. 2;
fig. 4 is a cross-sectional view taken along I-I shown in fig. 3.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1-3, the present invention provides a port-based ore batching method. The harbour-based ore batching method comprises the following steps:
s1, unloading various raw materials on the loading ship 100 to a port yard 1 and stacking to form a plurality of raw material piles 2. Specifically, each raw material is respectively piled in a stockyard in a stepping type squamous stockpiling mode. The port yard 1 is provided with two material strips, and a stacker-reclaimer 4 and a feeding conveyor 5 are arranged in the material strips. The ship unloader unloads the material on the loading ship 100 to the port, and the stacker-reclaimer 4 stacks the material onto the port yard 1.
Specifically, taking one of the raw materials as an example, the step-type scaly stacking mode comprises: the raw materials are piled up for a plurality of times along the port yard 1 through a stacker-reclaimer 4, small-sized piles are formed again at each pile gap of the raw materials, after the pile starting point of the bottom layer of the raw materials is determined, a plurality of small-sized piles are formed by piling up in sequence along the expected length and width directions of the piles, the small-sized piles are formed again at the two pile gaps of the upper layer of the piles at the lower layer of the piles, and the small-sized piles are formed by piling up in sequence until the pile is finished at the uppermost layer of the piles, so that one raw material pile 2 is formed. Therefore, each raw material forms a raw material pile 2, and the raw material piles 2 are sequentially distributed along the port yard 1, so that the operation mode of the stacker-reclaimer 4 is restrained, the mixing pile and the material mixing are avoided, and the stability of a single raw material is ensured.
S2, taking out various raw materials from the port yard 1 by using a stacker-reclaimer 4 and conveying the raw materials to different storage bins 6 for storage. All the bins 6 are erected at ports, and one bin 6 is used for placing one raw material. For example, the types of raw materials are a to i, and the raw materials are placed in a to i bins 6 according to a to i materials in the bins 6. Specifically, the various raw materials are respectively PB Australian powder, western skin powder, yang Difen, king powder, BRBF powder, brazil powder, canadian fine powder and iron oxide scale, and PB Australian powder, western skin powder, yang Difen, king powder, BRBF powder, brazil powder, canadian fine powder and iron oxide scale are respectively put into the respective storage bins 6. Wherein, the proportion of PB Australian powder is 20-30%, the proportion of Celastracene powder is 8-13%, the proportion of Yang Difen is 5-10%, the proportion of King powder is 7-15%, the proportion of BRBF powder is 20-30%, the proportion of Brazilian card powder is 5-6%, the proportion of Canadian fine powder is 10-15%, and the proportion of iron scale is 1-5%. Preferably, in this embodiment, the proportion of the powder B is 25%, the proportion of the powder of the skin is 11%, the proportion of the powder Yang Difen is 8%, the proportion of the powder of the king is 11%, the proportion of the powder of the BRBF is 25%, the proportion of the powder of the brazil is 6%, the proportion of the fine powder of canadian is 13%, and the proportion of the iron scale is 1%, and the optimal ore blending amount is obtained after uniformly mixing.
S3, after the raw materials in the storage bins 6 are discharged to conveying equipment according to a preset proportion to form primary mixing, the raw materials are transferred to a plurality of intermediate buffer bins 10 for material separation. It should be noted that, when no-load starting, the bins 6 of a-i are started in sequence in a delayed manner. After stable production, the belt is fast forward, continuously receives the materials of the a-i size bin 6 from an empty state, and forms a layer-by-layer material stacking shape to the tail of conveying equipment, so that a-i size is preliminarily mixed. Specifically, S31, a moisture meter is disposed on the conveying device, and moisture values of various raw materials are detected in the conveying process by the set moisture meter in the raw materials in the storage bin 6. S32, comparing the detected moisture value in the raw material with a moisture preset value, and judging whether the moisture value is higher or lower than the preset value; and S33, if the judgment result is yes, starting the automatic fine adjustment proportioning to control and adjust the discharge amount of each storage bin 6, and if the judgment result is no, continuously discharging the storage bins 6 according to the preset proportioning.
In addition, a test delay is set in the moisture detection process, and when the moisture data of the raw materials in the storage bins 6 is detected to be continuously higher or lower and exceeds the delay test value, the automatic fine adjustment proportioning is started again to control the discharging amount of each storage bin 6. By setting the test delay, the response speed can be effectively relieved, and the equipment is given buffer time.
And when the detected moisture data continuously exceeds or is lower than 0.5 of a preset moisture preset value in a delay range, starting the automatic fine adjustment proportioning. The moisture meter automatically detects the moisture data of the corresponding raw ore to serve as a basis for automatically fine-adjusting the proportioning scheme of the raw ore in the mixing process, and when detecting that the moisture of certain iron ore is abnormally higher or lower (namely exceeds the moisture standard plus or minus 0.50) for more than 120 seconds, the automatic fine-adjusting proportioning function is started. The water reference (namely the water preset value) is based on the water value adopted in the calculation of the blending proportion scheme. The detection principle of the moisture meter is that a material sample is dried rapidly through microwaves, the weight of the material before and after drying is weighed by a weighing sensor, and the moisture value of the material is calculated in real time.
S4, conveying materials to a plurality of intermediate surge bins 10 by conveying equipment, discharging quantitative mixed materials from each intermediate surge bin 10, and carrying out intensive mixing and discharging after impurity removal, wherein the method specifically comprises the following steps of:
s41, the materials discharged from the intermediate buffer bin 10 enter a intensive mixer 13 for intensive mixing, are discharged onto a discharge conveyor 14 after intensive mixing, and a componentmeter detects TFe and SiO in the mixed materials on the discharge conveyor 14 2 、Al 2 O 3 Component values of (2).
S42, mixing TFe, siO2 and Al2O3 component values detected by the component instrument with preset TFe, siO2 and Al 2 O 3 The component values are compared and it is judged whether they are higher or lower than a preset value. The composition meter bombards atomic nuclei of various elements of the sample by utilizing neutrons emitted by a neutron source to generate gamma rays, and the gamma rays are amplified by using a photosensitive element to obtain the composition and content information of the detected material.
And S43, if so, starting the automatic fine adjustment proportioning to control the discharge amount of each storage bin 6, and if not, continuously discharging the storage bins 6 according to the preset proportioning. It should be noted that the batch production complies with the stop principle of the batch breaker, the set bins must be smoothly discharged according to the proportion, the iron material of one bin is cut off, and other bins stop running according to the rule, namely the following bin is immediately stopped, and the former delay is stopped, so as to ensure accurate proportioning.
The automatic fine adjustment ratio is a material allocation scheme in the batching system. The batching system is a batching scheme which is used for seeking to mix TFe, siO2, al2O3 and the like of the uniform ores in various iron ore raw materials within a known constraint range, meets the technical index requirements and has the lowest cost, and feeds back to a batching bin to control the feeding proportion.
The main principle of the batching system is that a PLC control cabinet is arranged, detection and control signals in a project range are connected into the existing computer control system through the PLC control cabinet, so that the blanking quantity of different ore bins of a batching room is controlled according to detection information, the stability of ingredients such as TFe, siO2 and Al2O3 is guaranteed through closed-loop control of batching, and meanwhile, the technological parameters (rotating speed, filling rate and the like) of a powerful mixer are controlled, and the mixing effect of mixing ores is guaranteed through closed-loop control of a mixing process.
The automatic fine adjustment ratio comprises an ore blending model, and the moisture and component adjustment principle is specifically controlled by the ore blending model. Specifically, the ore blending model is as follows:
minG＝P 1 ·C 2 +P 2 ·C 2 +···+P j ·C j +···+P k ·C k ···+P n ·C n
wherein: p (P) j (j=1, 2, …, n) is the mass percent of iron ore raw material j, wherein 1,2, …, n represents different iron ore raw materials; c (C) j (j=1, 2, …, n) is the unit price of each raw material, meta/t; g is the total cost of the iron ore raw material, yuan/t;
the constraint conditions of the ore matching model mainly comprise chemical component constraint, raw material ratio constraint and mass conservation constraint;
wherein the chemical composition constraint of the iron ore mainly comprises TFe and SiO 2 、Al 2 O 3 ；
The general constraint relation is:
(i＝1,2,···m；j＝1,2,···n)
wherein: w (i) is the chemical component i of the iron ore raw material j; min [ w (i)]And max [ w (i)]Respectively representing the minimum value and the maximum value of the chemical composition i of the iron ore; i represents TFe, siO respectively 2 、Al 2 O 3 ；M sinter Is the quality of the mixed ore.
Wherein, the relation between the raw material proportioning constraint and the mass conservation constraint is as follows:
minP j ≤P j ≤maxP j
it should be noted that, the ore blending model adopts a linear programming method to solve the method so as to obtain the optimal ore blending quantity. TFe and SiO in raw materials are accurately calculated through a ore blending model 2 、Al 2 O 3 The components and the water content are adopted to obtain the optimal ore blending quantity, so that the blended ore is smoother in the subsequent production process, the product quality is higher, and the defects that the material mixing cannot be adjusted in real time, the mixing degree is lower and the like due to the fact that the secondary stock yard 'tiling and direct taking' technology in the traditional technology realizes uniform mixing by a method of tiling the raw materials layer by layer (300-600 layers) and then intercepting the raw materials are overcome.
Referring to fig. 4 in combination, the present invention further provides a port-based ore batching system. The ore batching system based on the port comprises a feeding system, a primary mixing system and a strong mixing system, wherein the feeding system is used for discharging raw materials from a loading ship 100 to a port yard 1, the primary mixing system is used for carrying out primary mixing according to a preset proportion after classifying and storing the raw materials, and the strong mixing system is used for carrying out strong mixing on the mixed materials after primary mixing and then conveying the mixed materials out. The feeding system, the primary mixing system and the strong mixing system are arranged on the port to realize storage-mixing-rotation of raw materials on the port, and a secondary stock yard is not required to be arranged to waste the occupied area, so that the occupied area and the investment operation cost of steel production are greatly reduced.
Specifically, the loading system comprises a ship unloader 3, a stacker-reclaimer 4 and a loading conveyor 5, wherein the ship unloader 3 is used for hoisting raw materials on a loading ship 100 to a port yard 1, the stacker-reclaimer 4 is used for stacking the materials in the port yard 1 in a classified manner, and transporting the raw materials in the port yard 1 to the primary mixing system. Raw materials are unloaded from the loading ship 100 to a port through a ship unloader, the stacker-reclaimer 4 places the raw material stacks 2 to the port yard 1 for sorting and stacking, and the raw materials in the port yard 1 are transported to each bin 6 through the loading conveyor 5.
The primary mixing system comprises a plurality of bins 6, disc feeders 7, belt scales 8 and a primary mixing conveyor 9, wherein the bins 6 are connected with the feeding conveyor 5, and one bin 6 is connected with one disc feeder 7 and one belt scale 8. The raw materials discharged from the bins 6 are screened by the disc feeders 7 and then discharged to the corresponding belt scales 8, and the belt scales 8 discharge the raw materials to the intensive mixing system according to a preset proportion. The disc feeder 7 separates out materials with different particle sizes (particle sizes smaller than 0.15mm can be screened out) through the vibrating screen, the screened materials are discharged onto the belt scale 8, the belt scale 8 obtains the duty ratio of the materials with different particle sizes, and then the average particle size and the particle size distribution are calculated. The belt scale 8 discharges to the primary mixing conveyor 9 according to the weight of the preset proportion, and a layer of stacked materials are formed on the primary mixing conveyor 9 to realize primary mixing of a plurality of raw materials. According to the scheme of batching, the corresponding bin positions of various ores are reasonably arranged and planned, the batching system equipment is allowed to be started after the material is taken until the material level of the bin is more than 30%, various raw materials to be mixed are planarly conveyed to a raw material bin for storage from a port, during production, iron-containing raw materials are discharged onto an electronic belt scale through a disc feeder, and are fed onto a primary mixing conveyor according to a preset proportion through the electronic belt scale.
The intensive mixing system comprises an intermediate buffer bin 10, a feeder 11, a sundry screen 12, a powerful mixer 13 and a discharge conveyor 14, wherein the intermediate buffer bin 10 is arranged at the downstream of the primary mixing conveyor 9, mixed materials conveyed from the primary mixing conveyor 9 are discharged to the intermediate buffer bin 10, and the materials are sequentially discharged to the discharge conveyor 14 after passing through the feeder 11, the sundry screen 12 and the powerful mixer 13. The primary mixing conveyor 9 transfers the prepared mixed materials to the intermediate surge bins 10, a belt feeder 11 is arranged at the outlet of each intermediate surge bin 10, a sundry screen 12 is arranged below the belt feeder 11, a powerful mixer 13 is arranged at the outlet of the sundry screen 12, and a discharging belt conveyor is arranged below the powerful mixer 13. The bin bottom discharge of the intermediate buffer bin 10 is directly dragged by a belt feeder and is stably fed into the sundry screen 12, so that sundries (lining plates, carrier rollers, belts, iron wires, large iron blocks and the like) mixed in the materials are removed. The iron-containing mixture with impurities removed is fed to the intensive mixer 13, and the materials are subjected to shearing and convection movements under the strong disturbance of the blades of the intensive mixer 13, so that the materials are dispersed and blended, and strong convection mixing is formed.
Specifically, the intermediate buffer bins 10 are three, and the three bins 6 are sequentially arranged side by side along the conveying channel of the feeding conveyor 5. It will be appreciated that, since the primary mixing conveyor 9 is constantly outputting material and is of a large capacity, in order to allow time and space for temporary storage and buffering of the material, it is necessary to first discharge the material into the intermediate surge bin 10 and then to discharge it to equipment downstream of the intermediate surge bin.
According to the harbour-based ore batching method and system, raw materials are unloaded to a harbour yard 1 pile for storage, different raw materials are conveyed to all bins 6 erected on a harbour for classification, all bins 6 are discharged to conveying equipment according to different preset proportions for premixing, mixed materials are discharged to a plurality of intermediate buffer bins 10 for distribution, quantitative mixed materials are discharged to a strong mixer for strong mixing, so that the purpose of mixing the raw materials is achieved, unloading of the raw materials from the harbour to storage, primary mixing and strong mixing transfer are achieved on the harbour, the conversion from the existing storage-transfer function to the storage-mixing-transfer function of the harbour is achieved, the harbour value is greatly improved, the construction of secondary material fields of iron and steel enterprises is canceled, and the occupied area and investment and operation cost of iron and steel production are greatly reduced.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A port-based ore batching method, comprising the steps of:
s1, unloading various raw materials on a loading ship to a port yard and stacking to form a plurality of raw material piles;
s2, taking out various raw materials from the port yard and conveying the raw materials to various different storage bins for storage;
s3, discharging raw materials in each bin to conveying equipment according to a preset proportion to form preliminary mixing, and then transferring the raw materials to a plurality of intermediate buffer bins for material separation;
s4, discharging quantitative mixture from the intermediate buffer bin, and performing strong mixing and discharging after impurity removal.
2. The port-based ore batching method according to claim 1, wherein in S1, each raw material is piled up in a stockyard separately by a stepwise scale stockpiling method, the stepwise scale stockpiling method is as follows:
and stacking the raw materials for a plurality of times along a stacking field, forming small stacks again at each stack gap of the raw materials, sequentially stacking the raw materials to form a plurality of small stacks along the expected length and width directions of the stacks after the stacking point of the bottom layer of the raw materials is determined, and sequentially stacking the upper layer of the raw materials at the two stacks gaps of the lower layer of the stacks until the stacks are finished to the uppermost layer to form a raw material stack.
3. The port-based ore batching method according to claim 1, wherein S3 comprises the steps of,
s31, detecting the moisture value of various raw materials in the conveying process;
s32, comparing the detected moisture value with a moisture preset value, and judging whether the detected moisture value is higher or lower than the preset value;
and S33, if so, starting the automatic fine adjustment proportioning to control the discharge amount of each bin, and if not, continuously discharging the bins according to the preset proportioning.
4. The port-based ore batching method according to claim 1, wherein S4 comprises the steps of,
s41, detecting TFe and SiO of the mixture after intensive mixing 2 、Al 2 O 3 Component values of (2);
s42, detecting TFe and SiO 2 、Al 2 O 3 The component value and the preset TFe, siO 2 、Al 2 O 3 Comparing the component values, and judging whether the component values are higher or lower than a preset value;
s43, if so, starting the automatic fine adjustment proportioning to control the discharge amount of each bin, and if not, continuously discharging the bins according to the preset proportioning.
5. The port-based ore batching method according to claim 3 or 4, wherein the automatic fine tuning proportioning comprises a batching model, the batching model being:
minG＝P 1 ·C 2 +P 2 ·C 2 +···+P j ·C j +···+P k ·C k ···+P n ·C n
wherein: p (P) j (j=1, 2, …, n) is the mass percent of the iron ore raw material j, wherein 1,2, …, n representsIs a different iron ore raw material; c (C) j (j=1, 2, …, n) is the unit price of each raw material; g is the total cost of the iron ore raw material.
6. A port based ore batching method according to claim 3 wherein a test delay is also set during moisture detection, the detected raw moisture data is continually high or low and exceeds the set delay test value, the automatic trimming proportioning is initiated.
7. A port based ore batching method according to claim 3 wherein the automatic fine tuning proportioning is initiated when the detected moisture data is 0.3-0.8 above or below the moisture preset value.
8. The ore batching system based on the port is characterized by comprising a feeding system, a primary mixing system and a strong mixing system, wherein the feeding system is used for discharging raw materials from a loading ship to a port yard, the primary mixing system is used for carrying out primary mixing according to a preset proportion after classifying and storing the raw materials, and the strong mixing system is used for carrying out strong mixing on the mixed materials after primary mixing and then conveying the mixed materials out.
9. The port-based ore batching system according to claim 8, wherein,
the loading system comprises a ship unloader, a stacker-reclaimer and a loading conveyor, wherein the ship unloader is connected with a loading ship and a port yard, and the stacker-reclaimer is used for conveying raw materials of the port yard to the primary mixing system;
the primary mixing system comprises a plurality of bins, disc feeders, belt scales and a primary mixing conveyor, wherein the bins are connected with the feeding conveyor, each bin is connected with one disc feeder and the belt scale, raw materials discharged from each bin are screened by the disc feeder and then discharged to the corresponding belt scale, and the belt scale discharges the raw materials to the strong mixing system according to a preset proportion;
the high-intensity mixing system comprises an intermediate buffer bin, a feeder, a sundry sieve, a powerful mixer and a discharging conveyor, wherein the intermediate buffer bin is arranged at the downstream of the primary mixing conveyor, mixed materials conveyed by the primary mixing conveyor are discharged to the intermediate buffer bin, and the materials sequentially pass through the feeder, the sundry sieve and the powerful mixer and then are discharged to the discharging conveyor.
10. The port based ore batching system according to claim 9 wherein a plurality of the bins are arranged side by side in sequence along the conveying path of the loading conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310933524.5A CN116747756A (en) | 2023-07-27 | 2023-07-27 | Ore batching method and system based on port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310933524.5A CN116747756A (en) | 2023-07-27 | 2023-07-27 | Ore batching method and system based on port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116747756A true CN116747756A (en) | 2023-09-15 |
Family
ID=87957342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310933524.5A Pending CN116747756A (en) | 2023-07-27 | 2023-07-27 | Ore batching method and system based on port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116747756A (en) |
-
2023
- 2023-07-27 CN CN202310933524.5A patent/CN116747756A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103695639B (en) | Sinter basicity inflation method | |
| CN102876886B (en) | Technical method and equipment for recycling iron-contained solid waste | |
| KR101480873B1 (en) | Apparatus and control method for crushing with uniform size coke using in sintering process | |
| CN108946205A (en) | A kind of iron ore ingredient blending system based on harbour | |
| CN111286574A (en) | Blast furnace ore coke groove auxiliary raw material feeding system and using method thereof | |
| CN114516553A (en) | Uniform mixing production system and method for multi-variety iron ores at port | |
| CN116747756A (en) | Ore batching method and system based on port | |
| CN113325885A (en) | Sintering mixture water adding method based on feed amount estimation | |
| CN106694187A (en) | Cement semi-finish grinding system with steady flow metering device | |
| CN106964271A (en) | A kind of system and method for compounding ingredient containing Iron Ore Powder | |
| CN111694323B (en) | Material preparation control method of RH feeding bin | |
| Bond et al. | Blending systems and control technologies for cement raw materials | |
| CN111020085B (en) | Feeding unit with parallel under-tank screening and discharging, ore coke tank feeding system and method | |
| CN108441591A (en) | A kind of mixing dosage system and method | |
| CN212051499U (en) | Blast furnace ore deposit coke groove auxiliary raw materials feeding system | |
| CN109321698B (en) | Batching method capable of effectively improving mixing and stacking efficiency | |
| CN211546585U (en) | Feeding unit with parallel screening and discharging under tank and ore coke tank feeding system | |
| CN108153340B (en) | Automatic batching method | |
| CN208802596U (en) | A kind of iron ore ingredient blending system based on harbour | |
| CN106042182A (en) | Control method and system for stirring station and stirring station | |
| CN214346079U (en) | Production line is handled to iron ore powder unloading and compounding integral type | |
| US4179234A (en) | Blending flowable solid materials | |
| CN102312087B (en) | Pellet batching device and pellet batching method | |
| CN217646582U (en) | Sand making equipment | |
| CN206150424U (en) | Mixed feed production system in advance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |