CN109916944B - Sintering cup test method and sintering cup - Google Patents
Sintering cup test method and sintering cup Download PDFInfo
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- 238000005245 sintering Methods 0.000 title claims abstract description 179
- 238000010998 test method Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 63
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000000919 ceramic Substances 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 238000011049 filling Methods 0.000 claims abstract description 8
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 238000007689 inspection Methods 0.000 claims abstract description 5
- 238000007405 data analysis Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 21
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000009770 conventional sintering Methods 0.000 abstract description 2
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000009467 reduction Effects 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 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 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 235000012054 meals Nutrition 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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Abstract
A sintering cup test method and a sintering cup belong to the technical field of steel smelting, and the sintering cup test method obtains data consistent with actual production by carrying out a sintering cup test on a sintering machine, and comprises the following specific operation steps: a. filling the pre-mixed test materials into a sintering cup, and then placing the sintering cup into a ceramic barrel; b. digging a pit on the mixture of the trolley of the sintering machine, and burying the ceramic barrel into the pit; c. the sintering cup passes through an igniter along with the trolley, and the mixture in the trolley and the test material in the sintering cup are sintered; d. taking out the sintering cup at the stage; e. carrying out finished product treatment and inspection on the sintered ore in the sintering cup; f. and (5) performing technical index calculation and data analysis. By adopting the sintering cup test method, test data consistent with actual production can be obtained, so that the problem that the conventional sintering cup test data has no guiding significance on the actual production is solved.
Description
Technical Field
The invention relates to a sintering cup test method and a sintering cup, in particular to a method for performing a sintering cup test on a sintering machine and a sintering cup adopted by the test method, and belongs to the technical field of steel smelting.
Background
The sintering cup test is a test for sintering iron ore by using cup-shaped small test equipment and simulating production conditions, and comprises the steps of raw material preparation, sintering, finished product treatment and inspection, technical index calculation and the like. The consolidation mechanism and the mathematical model of the sinter can be researched through the sinter pot test, so that the process is improved, the yield and the quality of the sinter are improved, and new raw materials and new processes can be researched through the sinter pot test, so that a reliable basis is provided for design departments. However, because the sintering cup test is carried out in a laboratory, and the sintering cup test is operated intermittently, the cup body has high side area to volume ratio, the air flow edge effect is large, and the heat dissipation capacity is large, the drum strength of the finished product of the sintering cake is low and the solid fuel consumption is high under the same operation condition; in addition, the air leakage rate is small, and the sintering utilization coefficient is higher; the above reasons lead to a certain difference between some technical indexes of the sintering cup test and the indexes of actual production.
In order to improve test data of the sintering cup and enable the test data to be closer to actual production, a method for enlarging the diameter of the sintering cup is generally adopted, although the enlarged diameter of the sintering cup is beneficial to the generation of liquid phase, the test data of the sintering cake is stronger in representativeness and can more effectively reflect the metallurgical performance of the sintering mineral powder, but the test data are used for guiding the actual production and also need correction of empirical data. In addition, the method is also a method for carrying out cage-throwing test on a sintering machine, namely, mixing and granulating mineral powder, then filling the mixture into a breathable iron box, burying the mixture into a trolley of the sintering machine, taking the mixture out of tail sintered ore after sintering, and carrying out physicochemical analysis on the obtained sintered ore. Because the mineral seed materials tested by the cage-throwing test method are tightly combined with the materials in the sintering machine trolley in sintering, liquid phase exchange can occur, a certain influence is generated on the final test result, accurate data of the sintering performance of the test mineral seed materials can not be obtained, and the method has no guiding significance on production.
Disclosure of Invention
The invention provides a sintering cup test method, which aims to solve the problem that the conventional sintering cup test data lacks guiding significance for actual production; meanwhile, in order to ensure the implementation of the test method of the sintering cup, the invention also provides a sintering cup matched with the test method.
The above object of the present invention is achieved by the following technical solutions:
a sintering cup test method is used for obtaining data consistent with actual production by carrying out a sintering cup test on a sintering machine, and comprises the following specific operation steps:
a. filling the pre-mixed test materials into a sintering cup, compacting the test materials according to a set test standard, selecting a ceramic barrel matched with the sintering cup, placing a bedding material at the bottom of the ceramic barrel, placing the sintering cup in the ceramic barrel, filling gaps between the ceramic barrel and the sintering cup with raw mineral powder, and tamping;
b. after the trolley of the sintering machine passes through the material pressing device, the mixture in the trolley is compacted, the trolley is stopped to run, a pit is dug on the mixture of the trolley, a ceramic barrel is buried in the pit, and gaps between Tao Tong and the mixture in the trolley are backfilled and compacted;
c. starting the trolley, enabling the sintering cup to move along with the trolley, and enabling the trolley and the sintering cup to pass through an igniter together to sinter the mixture in the trolley and the test material in the sintering cup;
d. after the trolley runs to the tail part of the sintering machine, taking out the sintering cup;
e. carrying out finished product treatment and inspection on the sintered ore in the sintering cup;
f. and (5) performing technical index calculation and data analysis.
In the above-mentioned test method for the sintering cup, in the step b, after the ceramic barrel is embedded in the mixture in the trolley, the upper surface of the sintering cup is flush with the upper surface of the mixture in the trolley.
In the above-mentioned test method of the sintering cup, in the said step b, dig a plurality of holes in the mixture in the trolley, embed the sintering cup and pottery bucket filled with test materials of different proportions into different holes.
In the above-mentioned test method for a sintered cup, in the step b, the central axis of the pit is perpendicular to the upper surface of the mixture in the trolley.
In the above-described method for testing a sintered cup, in the step c, the sintering parameters are controlled.
A sintering cup is used for completing an iron ore sintering test on a sintering machine, and is provided with a cup body and a cup bottom; the cup body is of a split structure and is formed by combining a left part and a right part, the left part and the right part are hinged and assembled with the cup bottom through a connecting shaft, and the left part and the right part are connected and closed through a hinged hook component arranged at the upper end of the left part and the right part.
The sintering cup is characterized in that a plurality of long grooves are formed in the bottom of the sintering cup.
The sintering cup is characterized in that a handle is arranged on the side wall of the cup body.
According to the sintering cup, the left part and the right part of the cup body are made of steel materials, a steel cylinder is formed after the left part and the right part of the cup body are closed, and the bottom of the cup body is a round steel plate matched with the bottom surface of the steel cylinder.
According to the sintering cup, the diameter of the inner cavity of the steel cylinder of the cup body is 300mm, the height of the steel cylinder of the cup body is 500mm, the diameter of the round steel plate of the cup bottom is 300mm, and a plurality of long grooves with the width of 9mm are formed in the round steel plate of the cup bottom.
According to the test method of the sintering cup, a special sintering cup is adopted to finish an iron ore sintering test on a sintering machine, firstly, mixed non-test materials are filled in the sintering cup, the sintering cup is placed in a ceramic barrel, then the ceramic barrel is buried in a trolley of the sintering machine for mixing materials, and along with the movement of the trolley, the sintering cup is ignited and roasted through an igniter, so that a test finished product (sintering cake) is finally obtained; in addition, as the gap between the ceramic barrel and the sintering cup is filled with raw mineral powder, in the sintering cup test process, the problem that the outer wall of the sintering cup is burnt out due to the fact that the ceramic barrel is crushed due to shrinkage of the sintering mineral is avoided, and the sintering cup is more convenient to take out at the tail part of the sintering machine.
The left and right parts of the cup body are hinged with the cup bottom through the connecting shaft and are connected through the hinged hook component to enable the cup bottom to be closed, so that after the sintering is finished, the sintering cup is taken out of the trolley, the hinged hook component can be directly opened, the left and right parts of the cup body rotate around the connecting shaft in opposite directions under the action of extrusion force of sintering ores, and finished sintering cakes in the sintering cup are poured out, and the sintering cakes are taken out more conveniently and rapidly.
In summary, by the method for testing the sintering cup and the sintering cup matched with the method for testing the sintering cup, test data consistent with actual production can be obtained, so that the problem that the conventional test data of the sintering cup has no guiding significance on the actual production is solved.
Drawings
FIG. 1 is a schematic illustration of a mixture of a sintering cup embedded in a sintering pallet through a ceramic barrel;
FIG. 2 is a schematic view of the structure of the sintering cup according to the present invention;
FIG. 3 is a view in the K-direction of FIG. 2;
FIG. 4 is a schematic view of the cross-sectional structure A-A in FIG. 3.
The list of the reference numerals in the drawings is: 1. 1-1 parts of sintering cup, 1-2 parts of cup body, 1-3 parts of cup bottom, 1-4 parts of connecting shaft, 1-5 parts of hinged hook component, 1-5 parts of handle, 2 parts of test material, 3 parts of raw mineral powder, 4 parts of ceramic barrel, 5 parts of trolley and the mixture in the trolley.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.
Referring to fig. 1, the method for testing the sintering cup in the invention obtains data consistent with actual production by performing the sintering cup test on a sintering machine, and comprises the following specific operation steps:
a. filling a test material 2 which is pre-mixed according to a certain proportion into a sintering cup 1, compacting the test material 2 according to a set test standard, selecting a ceramic barrel 4 matched with the sintering cup, placing a bedding material 6 at the bottom of the ceramic barrel 4, placing the sintering cup 1 in the ceramic barrel 4, filling gaps between the ceramic barrel 4 and the sintering cup 1 with raw mineral powder 3, and tamping;
b. after a trolley of the sintering machine passes through a material pressing device, the mixture 5 in the trolley is compacted, the trolley stops running, a vertical pit is dug on the mixture 5 in the trolley, a ceramic barrel 4 is buried in the pit, the upper surface of a sintering cup 1 is ensured to be level with the upper surface of the mixture 5 in the trolley, and gaps between the ceramic barrel 4 and the mixture 5 in the trolley are backfilled and compacted;
c. starting the trolley, enabling the sintering cup 1 to move along with the trolley, and sintering the mixture 5 in the trolley and the test material 2 in the sintering cup 1 together through the igniter;
d. after the trolley runs to the tail part of the sintering machine, taking out the sintering cup 1;
e. carrying out finished product treatment and inspection on the sintered ore in the sintering cup 1;
f. and (5) performing technical index calculation and data analysis.
The test method of the sintering cup can also simultaneously test a plurality of groups of materials with different component proportions, and the following three specific examples of the materials with different component proportions are listed:
proportioning example one:
| indian meal (kg) | Super powder (kg) | PB powder (kg) | Newman powder (kg) | Brazilian south powderkg) | Lime (kg) | Limestone powder (kg) |
| 8.00 | 15.30 | 22.00 | 15.00 | 8 | 7.00 | 3.40 |
| Sintered ore composition | TFe | SiO2 | CaO | MgO | Al2O3 | Alkalinity (basicity) |
| Numerical value (%) | 54.05 | 5.50 | 10.45 | 3.16 | 2.53 | 1.90 |
Proportioning example II:
| indian meal (kg) | Super powder (kg) | PB powder (kg) | Newman powder (kg) | Brazil south powder (kg) | Lime (kg) | Limestone powder (kg) |
| 8.00 | 15.05 | 22.00 | 15.00 | 8.00 | 7.25 | 3.40 |
| Sintered ore composition | TFe | SiO2 | CaO | MgO | Al2O3 | Alkalinity (basicity) |
| Numerical value (%) | 53.88 | 5.50 | 10.70 | 3.17 | 2.53 | 1.95 |
Proportioning example III:
| indian meal (kg) | Super powder (kg) | PB powder (kg) | Newman powder (kg) | Brazil south powder (kg) | Lime (kg) | Limestone powder (kg) |
| 6 | 13 | 21.8 | 17.25 | 10 | 7.25 | 3.4 |
| Sintered ore composition | TFe | SiO2 | CaO | MgO | Al2O3 | Alkalinity (basicity) |
| Numerical value (%) | 54.05 | 5.48 | 10.67 | 3.16 | 2.46 | 1.95 |
When the test materials are subjected to the sintering cup test at the same time, the test materials with three different component ratios are respectively filled into three different sintering cups, marks are made, and the three sintering cups are respectively placed into three ceramic barrels; step b, three pits are dug on the mixture 5 in the trolley, three ceramic barrels are respectively placed in the three pits, and then the sintering cup test is carried out according to the subsequent operation steps of the sintering cup test method, so that the sintering cake finished products of the mineral seed tests with different component proportions are obtained under the same test conditions, and then the comparison is carried out, so that ideal data are obtained for guiding the actual production.
According to the method for testing the sintering cup, in the step c, sintering parameters such as negative pressure (pressure difference between the upper and lower material surfaces of the mixture in the trolley), ignition temperature, vertical sintering speed, horizontal sintering speed and the like can be controlled, so that performance indexes of a finished test product (sintered cake) are improved. Specific examples are as follows:
sintering parameter control example one: the negative pressure (-kPa) 13.2, the ignition temperature (DEG C) 1100, the vertical sintering speed (m/min) 0.03044, the horizontal sintering speed (m/min) 1.607, the sintering cake was taken out after sintering for 12 minutes, the sinter drum index (physical property index reflecting the mechanical strength of the sinter) was detected to be 76.33%, the RDI+3.15 (RDI: low temperature reduction pulverization index), which is an important index for the metallurgical performance of the sinter, the fluctuation of RDI+3.15 directly affects the air permeability of the blast furnace charging post, and increases the top blowing amount, the higher the value is, the better the value is, the 10% of heavy load reduction soft-melt drops (the temperature at which the experimental sample starts to shrink by 10% under the reducing condition is defined as the initial softening temperature, the thickness and the height of the slagging belt are affected if the temperature is too low) is 1164 ℃, and the 40% of heavy load reduction soft-melt drops is 1273 ℃.
Sintering parameter control example two: negative pressure (-kPa) 13.2, ignition temperature (deg.c) 1100, vertical sintering speed (m/min) 0.03044, horizontal sintering speed (m/min) 1.607, and after 15 minutes of sintering, the sintered cake was taken out, and the sintered cake was tested for sinter drum index (%) 77.05, rdi+3.15 (%) 80.34, load reduction soft melt drop 10% (deg.c) 1165, load reduction soft melt drop 40% (deg.c) 1282.
Sintering parameter control example three: negative pressure (-kPa) 13.2, ignition temperature (c) 1100, vertical sintering speed (m/min) 0.03044, horizontal sintering speed (m/min) 1.607, sintering for 20 minutes, and taking out sintered cakes, and detecting sinter drum index (%) 77.49, rdi+3.15 (%) 80.64, load reduction soft melt drop 10% (°c) 1174, load reduction soft melt drop 40% (°c) 1283.
The comparison condition of test data and actual production operation data obtained by the sintering cup test method disclosed by the invention is shown in the following table:
as can be seen from the above table data: by adopting the sintering cup test method, the obtained sintering cake product parameters are basically consistent with the sintering ore parameters produced by an actual sintering machine, so that the data obtained by the sintering cup test method can be used for guiding the actual production.
Referring to fig. 2, 3 and 4, the present invention also provides a sintering cup 1 for performing an iron ore sintering test on a sintering machine, the sintering cup 1 being provided with a cup body 1-1 and a cup bottom 1-2; the cup body 1-1 is of a split structure and is formed by combining a left part and a right part, the left part and the right part are hinged with the cup bottom 1-2 through a connecting shaft 1-3, the left part and the right part are connected and closed through a hinged hook assembly 1-4 arranged at the upper end of the cup body, a cylindrical structure is formed after the left part and the right part are closed, after the sintering cup 1 is taken out of a trolley after sintering, the hinged hook assembly 1-4 can be directly opened, the left part and the right part of the cup body rotate around the connecting shaft 1-3 in opposite directions under the extrusion force of sintering ores, finished sintered cakes in the sintering cup are poured out, a handle 1-5 is arranged on the side wall of the cylindrical structure, and the sintering cup 1 can be conveniently taken out and placed through the handle 1-5; the cup bottom 1-2 is a round steel plate matched with the bottom surface of the steel cylinder, and a plurality of long grooves 1-2-1 with the width of 9mm are arranged on the cup bottom 1-2. As the preferred embodiment of the sintering cup, the cup body 1-1 is a steel cylinder consisting of a left part and a right part, the diameter of the inner cavity of the steel cylinder is 300mm, the height of the steel cylinder is 500mm, the diameter of a round steel plate at the cup bottom 1-2 is 300mm, and a plurality of long grooves 1-2-1 are formed in the round steel plate at the cup bottom and are used as a flue gas channel reserved at the bottom of the sintering cup, so that the flow of flue gas in the sintering process is facilitated, and the smooth proceeding of the sintering process is ensured.
Claims (9)
1. A sintering cup test method uses a sintering cup (1) provided with a cup body (1-1) and a cup bottom (1-2); the cup body (1-1) is of a split structure and is formed by combining a left part and a right part, the left part and the right part are hinged and assembled with the cup bottom (1-2) through a connecting shaft (1-3), and the left part and the right part are connected and closed through a hinged hook component (1-4) arranged at the upper end of the left part and the right part, and the cup is characterized in that: the method acquires data consistent with actual production by carrying out a sintering cup test on a sintering machine, and comprises the following specific operation steps:
a. filling a pre-mixed test material (2) into a sintering cup (1), compacting the test material (2) according to a set test standard, selecting a ceramic barrel (4) matched with the sintering cup, placing a bedding material (6) at the bottom of the ceramic barrel (4), placing the sintering cup (1) in the ceramic barrel (4), and filling and tamping gaps between the ceramic barrel (4) and the sintering cup (1) with raw mineral powder (3);
b. after passing through the material pressing device, the trolley of the sintering machine compacts the mixture (5) in the trolley, stops the trolley, digs a pit hole in the mixture (5) in the trolley, buries the ceramic barrel (4) into the pit hole, and backfills and compacts gaps between the ceramic barrel (4) and the mixture (5) in the trolley;
c. starting the trolley, enabling the sintering cup (1) to move along with the trolley, and enabling the trolley and the sintering cup to pass through an igniter together to sinter the mixture (5) in the trolley and the test material (2) in the sintering cup (1);
d. after the trolley runs to the tail part of the sintering machine, taking out the sintering cup (1);
e. carrying out finished product treatment and inspection on the sintered ore in the sintering cup (1);
f. and (5) performing technical index calculation and data analysis.
2. The method according to claim 1, wherein in the step b, after the ceramic barrel (4) is buried in the mixture (5) in the sintering machine trolley, the upper surface of the sintering cup (1) is flush with the upper surface of the mixture (5) in the trolley.
3. The method according to claim 2, wherein in the step b, a plurality of pits are dug in the mixture (5) in the trolley, and the sintering cup (1) and the ceramic barrel (4) filled with the test materials (2) with different proportions are buried in the different pits.
4. A method according to claim 3, characterized in that in step b the centre axis of the pit is perpendicular to the upper surface of the mix (5) in the trolley.
5. The method according to any one of claims 1 to 4, wherein in step c, sintering parameters are controlled.
6. A method of testing a sintered cup according to claim 1, characterized in that the bottom (1-2) is provided with a plurality of elongated slots (1-2-1).
7. A method of testing a sintered cup according to claim 1, wherein a handle (1-5) is provided on the side wall of the cup (1-1).
8. The method for testing the sintering cup according to claim 1, wherein the left and right parts of the cup body (1-1) are made of steel materials, a steel cylinder is formed after the cup body is closed, and the cup bottom (1-2) is a round steel plate matched with the bottom surface of the steel cylinder.
9. The method for testing the sintering cup according to claim 1, wherein the diameter of the inner cavity of the steel cylinder of the cup body (1-1) is 300mm, the height is 500mm, the diameter of the round steel plate of the cup bottom (1-2) is 300mm, and a plurality of long grooves (1-2-1) with the width of 9mm are formed in the round steel plate of the cup bottom.
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