CN212008570U - Magnet pellet smashes football shirt and puts - Google Patents
Magnet pellet smashes football shirt and puts Download PDFInfo
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- CN212008570U CN212008570U CN202020699418.7U CN202020699418U CN212008570U CN 212008570 U CN212008570 U CN 212008570U CN 202020699418 U CN202020699418 U CN 202020699418U CN 212008570 U CN212008570 U CN 212008570U
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Abstract
The utility model discloses a magnet pellet smashes football shirt and puts has: a base plate; the baffle is arranged on the bottom plate; the baffle can block the side surface of the magnet pellet; the supporting plate is arranged on the bottom plate; a gap is formed between the supporting plate and the baffle plate, and the gap between the supporting plate and the baffle plate is 8 mm; the support plate can support the magnet pellets; the magnet pellets are placed on the gap, the side surfaces of the magnet pellets are in contact with the baffle, and the bottom surfaces of the magnet pellets are in contact with the supporting plate; the height that highly is less than the baffle of backup pad splits into two with the pellet, avoids the pellet to smash, through measuring the inside sandwich data of pellet, calculates magnetite finished product ball FeO content fast, avoids chemical examination time length and the big shortcoming of error rate, provides quick guide for the operation adjustment of magnetite pelletizing production line.
Description
Technical Field
The utility model belongs to the technical field of the ferrous metallurgy trade, especially, relate to a magnet pellet smashes football shirt and puts.
Background
Blast furnace iron making is characterized by 'seven-minute raw material and three-minute operation', and the quality requirement on blast furnace burden is higher and higher along with the requirements of large-scale and automation of a blast furnace and maximum fuel ratio reduction. Generally, the coke ratio can be reduced by 8-9% when the reduction degree of the blast furnace raw material is increased by 10%, and the coke ratio can be reduced by l% when the content of ferrous oxide is reduced by 1%. The FeO content of the pellets is one of the main physicochemical indexes of magnetite pellets, the FeO content of the pellets is reduced, the metallurgical performance of the pellets is favorably improved, the reduction degree and the mechanical strength of the pellets can be improved, and the blast furnace index is favorably improved.
In the process of implementing the present invention, the inventor finds that the prior art has at least the following problems: in actual production, the FeO of the magnet pellets is often fluctuated due to the influence of raw materials, thermal parameters, equipment working conditions and the like, but the current basis for measuring the FeO content of the pellets is GB/T6730.8-1986 'volumetric method for measuring the ferrous content by potassium dichromate in iron ore chemical analysis method', the method is influenced by reagents, instruments, sampling, sample preparation, analysis and the like, and has the defects of long test time and large error rate, so that the adverse influence is brought to the production of the pellets and a blast furnace, and the energy conservation and emission reduction of an iron-making process are not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a crack into two with pellet, avoid the pellet to smash, through measuring the inside sandwich data of pellet, calculate magnetite finished product ball FeO content fast, avoid chemical examination time length and the big shortcoming of error rate, provide the magnet pellet of quick guide for the operation adjustment of magnetite pelletizing production line and pound the ball device.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a kind of magnet pellet smashes the ball device, have:
a base plate;
the baffle is arranged on the bottom plate; the baffle can block the side surface of the magnet pellet;
the supporting plate is arranged on the bottom plate; a gap is formed between the supporting plate and the baffle plate, and the gap between the supporting plate and the baffle plate is 8 mm; the support plate can support the magnet pellets; the magnet pellets are placed on the gap, the side surfaces of the magnet pellets are in contact with the baffle, and the bottom surfaces of the magnet pellets are in contact with the supporting plate; the height of the supporting plate is lower than that of the baffle.
The height of the supporting plate is 30-50 mm; the height of the baffle is 5-8 mm higher than that of the supporting plate.
The bottom plate, the baffle plate and the supporting plate are all made of steel.
One of the technical schemes has the advantages or beneficial effects that the pellets are cracked into two pieces, the pellets are prevented from being crushed, the FeO content of the finished magnetite pellets is quickly calculated by measuring the internal sandwich data of the pellets, the defects of long testing time and large error rate are avoided, and quick guidance is provided for the operation and adjustment of the magnetite pellet production line.
Drawings
Fig. 1 is a schematic structural view of a magnet pellet hitting device provided in an embodiment of the present invention;
the labels in the above figures are: 1. bottom plate, 2, baffle, 3, backup pad.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a pellet hitting device for a magnet pellet includes:
a base plate;
the baffle is arranged on the bottom plate; the baffle can block the side surface of the magnet pellet;
the supporting plate is arranged on the bottom plate; a gap is formed between the supporting plate and the baffle plate, and the gap between the supporting plate and the baffle plate is 8 mm; the support plate can support the magnet pellets; the magnet pellets are placed on the gap, the side surfaces of the magnet pellets are in contact with the baffle, and the bottom surfaces of the magnet pellets are in contact with the supporting plate; the height of the supporting plate is lower than that of the baffle.
The height of the supporting plate is 30-50 mm; the height of the baffle is 5-8 mm higher than that of the supporting plate. The bottom plate, the baffle plate and the supporting plate are all made of steel.
Magnetite pellet incomplete reaction nuclear model theory. The fine particle magnetite concentrate (more than 80 percent of the proportion of minus 200 meshes) is made into green pellets with the thickness of 10-18mm through a pelletizing process, and the FeO content is 10-30 percent. After the green pellets enter the roasting process, under the action of high-temperature air, the oxidation of magnetite concentrate particles is firstly carried out on the surfaces of the pellets (FeO is oxidized into Fe)2O3) As the reaction proceeds, the reaction interface gradually advances inward until the reaction is complete, i.e., the nuclear model is not completely reacted.
The pellet is placed on a supporting plate of the ball smashing device (and is close to the baffle); the detector holds the round-head hammer to pound the finished product ball, and the pellet cracks into two pieces (avoiding the pellet to smash, being favorable to observing the inside calcination condition of the pellet) under the shearing force effect between the hammer and the support plate of the ball smashing device, if a sandwich structure exists, the section diameter of one of the two pieces and the corresponding sandwich diameter are measured.
If there is no sandwich structure, the pellet has a sandwich diameter of 0 mm.
In the same way, 10 pellets were broken apart and the diameter of the cross section of each pellet and the corresponding diameter of the sandwich were measured.
A calculation table of the FeO content of the pellet is designed in an EXCEL table, and the measured data such as the sandwich diameter, the section diameter and the like are input to automatically calculate the FeO content of the pellet. The formula for calculating the FeO content of the pellets is explained as follows:
as shown in the following table, the calculation table includes two sections, an input field and an output field.
(1) The input column items comprise the section diameter D of the pellet, the sandwich diameter D, the initial FeO content W1 of the pellet, the FeO content correction coefficient A of the sandwich structure and the FeO correction value B of the pellet.
(ii) a cross-sectional diameter D. And (5) measuring after smashing the ball.
② the diameter d of the sandwich. And measuring after the ball is hit, wherein the diameter of the sandwich and the diameter of the section of the same ball are measured on the same section.
③ initial FeO content W of pellet1. According to the FeO content of each raw material and the mixture ratio of the raw materials, the formula is calculated as follows:
initial FeO content W of the pellets1The amount of FeO carried into the pellets by the various raw materials ∑.
Fourthly, correcting coefficient A of FeO content in the sandwich structure. Because the pellet sandwich structure does not have oxidation reaction but has incomplete oxidation reaction, the FeO content of the sandwich structure needs to be corrected, the value range of the correction coefficient is more than 0 and less than 1, and the specific value is determined by the corresponding experiment of pellet sandwich data and the FeO content of the finished pellet.
Pellet FeO correction value B. In the actual production, when the ball is broken, 10 pellets have no sandwich structure, but the FeO content of the pellets is measured to be between 0.15 and 0.30 percent, so the FeO content needs to be corrected again.
(2) The output column item contains single-sphere FeO content W2And the FeO content of the finished ball is W.
The single-ball FeO content is obtained by calculating the correction coefficients of the section diameter, the sandwich diameter, the initial FeO content of the pellet and the FeO content of the sandwich structure, and the calculation formula is as follows:
FeO content of single sphere
② the FeO content of the finished ball is W. The FeO content W of the finished ball is equal to the average value of the FeO content of 10 single balls.
Example of table for calculating FeO content in pellet
The implementation effect is as follows:
(1) the invention has the following effects: by quickly and accurately analyzing the FeO content of the magnet pellets and quickly adjusting the operating parameters, the stability of the FeO content of the pellets is greatly improved. The method is operated by a chain grate-rotary kiln of 220 million tons of horse steel per year, the FeO content of finished pellets is judged by sampling on a finished belt per shift, the operation parameters are adjusted in time, the FeO content of the pellets is reduced to about 0.35 percent from 0.72 percent, the reduction range is 51.38 percent, and the proportion of the FeO of the pellets exceeding 1.0 percent is reduced to below 1 percent from about 30 percent.
(2) Benefit calculation
1) When the FeO content of the raw material entering the furnace is reduced by 1 percent, the coke ratio of the blast furnace is reduced by l percent. The average of the original pellet FeO is 0.72 percent, the average of the pellet FeO is 0.35 percent at present, and the average value is 4000m in a new zone of the horse steel in 2 months in 20193The cost data of the blast furnace is calculated, the metallurgical coke of one type is 1813 yuan/ton, the blast furnace coke ratio is 371Kg/t-TFe, the monthly yield of the blast furnace is 51.11 ten thousand tons, the proportion of the pellets fed into the furnace is 20 percent, and the annual benefit is (0.72-0.35). times.371 ÷ 1000X 51.11. times.1%. times.1813X 12. times.20 percent) is 305.27 ten thousand yuan.
2) The operation parameters are optimized, the unit consumption of the coal gas of the pellet production line is greatly reduced, and the cost reduction benefit is obvious. By quickly judging the FeO of the pellets and timely adjusting the operating parameters, the unit gas consumption is reduced to 0.587GJ/t, and the annual benefit reaches over 658.58 ten thousand yuan.
Through calculation, the direct economic annual benefit reaches more than 963.85 ten thousand yuan, and in addition, the indirect benefit brought by prolonging the service life of key equipment of the production line, reducing pollutant emission and the like is also very obvious.
The time for analyzing the FeO content of the pellet ore is greatly reduced. The method can calculate the FeO content of the pellet only by measuring the diameter of the pellet sandwich, the time required in the whole process is about 5 minutes, the time is reduced by about 175 minutes compared with the original analysis method (potassium dichromate volumetric method), and the FeO content of the pellet can be basically analyzed on line.
The accuracy of the analysis result is high. The detection of the FeO of the pellet by the potassium dichromate volumetric method is influenced by reagents, instruments, sampling, sample preparation, analysis and the like, and large errors often occur. Tests prove that the method only measures the diameter of the pellet sandwich to calculate the FeO content of the pellet, avoids the influence of reagents, instruments, sampling, sample preparation, analysis and the like, and is beneficial to improving the accuracy of the analysis result.
The analysis process and the analysis tool are simple and have strong operability.
The compressive strength of the pellet and the content of FeO can be integrally analyzed. The ball smashing device can be upgraded and modified, a mechanical transmission system, a force measurement control system, an image distance measurement system and the like are added, the purpose that manual ball smashing is replaced by ball pressing by a machine is achieved, the diameter of a pellet sandwich is automatically measured, the content of FeO in the pellet is automatically calculated, and meanwhile the crushing strength of the pellet is displayed.
After the structure is adopted, the pellets are cracked into two pieces, so that the pellets are prevented from being crushed, the FeO content of the finished magnetite pellets is quickly calculated by measuring the internal sandwich data of the pellets, the defects of long testing time and large error rate are avoided, and quick guidance is provided for the operation and adjustment of a magnetite pellet production line.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (3)
1. A kind of magnet pellet smashes the ball device, characterized by that, have:
a base plate;
the baffle is arranged on the bottom plate; the baffle can block the side surface of the magnet pellet;
the supporting plate is arranged on the bottom plate; a gap is formed between the supporting plate and the baffle plate, and the gap between the supporting plate and the baffle plate is 8 mm; the support plate can support the magnet pellets; the magnet pellets are placed on the gap, the side surfaces of the magnet pellets are in contact with the baffle, and the bottom surfaces of the magnet pellets are in contact with the supporting plate; the height of the supporting plate is lower than that of the baffle.
2. A magnetic pellet hitting device as claimed in claim 1, wherein the height of the support plate is 30-50 mm; the height of the baffle is 5-8 mm higher than that of the supporting plate.
3. A magnetic pellet hitting device as claimed in claim 2, wherein the bottom plate, the baffle plate and the support plate are made of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020699418.7U CN212008570U (en) | 2020-04-29 | 2020-04-29 | Magnet pellet smashes football shirt and puts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020699418.7U CN212008570U (en) | 2020-04-29 | 2020-04-29 | Magnet pellet smashes football shirt and puts |
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| CN212008570U true CN212008570U (en) | 2020-11-24 |
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| CN202020699418.7U Active CN212008570U (en) | 2020-04-29 | 2020-04-29 | Magnet pellet smashes football shirt and puts |
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| CN (1) | CN212008570U (en) |
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