CN111014008A - Direct reduced iron cooling and screening device - Google Patents
Direct reduced iron cooling and screening device Download PDFInfo
- Publication number
- CN111014008A CN111014008A CN201911233710.8A CN201911233710A CN111014008A CN 111014008 A CN111014008 A CN 111014008A CN 201911233710 A CN201911233710 A CN 201911233710A CN 111014008 A CN111014008 A CN 111014008A
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- CN
- China
- Prior art keywords
- vibrating screen
- shale shaker
- chute
- reduced iron
- direct reduced
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a direct reduced iron cooling and screening device, and belongs to the technical field of steel smelting. The invention comprises a primary vibrating screen and a secondary vibrating screen, wherein the primary vibrating screen and the secondary vibrating screen are arranged in a gradually inclined manner, a rotary kiln chute is arranged at the input end of the primary vibrating screen, direct reduced iron materials are placed in the rotary kiln chute, an oversize heat-resistant adhesive tape conveyor is arranged at the output end of the secondary vibrating screen, spraying devices are arranged at intervals at the upper parts of the primary vibrating screen and the secondary vibrating screen, and undersize chutes are arranged at the lower parts of the primary vibrating screen and the secondary vibrating screen. The whole cooling mode of the invention is spray cooling, the water consumption is greatly reduced, the water consumption is accurate and adjustable, the pellet can be cooled to a certain temperature, the excessive high water content of the pellet is avoided, the undersize chute is a step-shaped chute, the material feeding speed can be slowed down, the device not only achieves the effect of cooling the high-temperature pellet, but also achieves the effect of screening the pellet.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a direct reduced iron cooling and screening device.
Background
The blast furnace gas ash is solid waste obtained by carrying out dry dust removal on fine dust carried by blast furnace gas in a blast furnace ironmaking process, has complex chemical components and mainly contains elements such as iron, carbon, zinc and the like. About 20kg of gas ash is generated when 1t of steel is produced by the blast furnace, so that the generation amount of high-zinc gas ash in China exceeds 10 Mt/a. At present, the direct reduction treatment of blast furnace gas ash by a rotary kiln is one of the main technologies. The process comprises the steps of uniformly mixing gas ash, coal powder or other carbon-containing substances and a binder to prepare carbon-containing pellets, drying the carbon-containing pellets, enabling the dried pellets to enter a rotary kiln, reducing the pellets into metallized pellets in a reduction area at 1000-1100 ℃ in the kiln, reducing zinc into metal zinc, volatilizing the metal zinc into flue gas, and recovering the zinc from the flue gas through subsequent treatment. After the reaction is finished, the general subsequent treatment flow of the high-temperature reduction pellets from the rotary kiln is to cool the pellets, grind and magnetically separate the cooled pellets to obtain fine iron powder, then briquetting the fine iron powder, and feeding the briquetted iron blocks into a blast furnace for iron making or an electric furnace for steel making. In actual operation, considering the complexity of the process and the economic problem, the high-temperature reduction pellets are usually cooled and then screened, the oversize bulk materials enter a blast furnace for iron making, and the undersize powder enters sintering. In the prior art, a cylindrical cooler and direct water quenching are the two main cooling modes of direct reduced iron of a rotary kiln, but the cylindrical cooler is indirectly cooled and has the problem of low cooling efficiency; although the direct water quenching has good cooling effect, the water consumption is large, the operation environment is poor, and the water content of the cooled pellets is large, so that the subsequent treatment is not facilitated.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the defects and shortcomings in the prior art, the invention provides the direct reduced iron cooling and screening device, the integral cooling mode of the direct reduced iron cooling and screening device is spray cooling, the water consumption is greatly reduced, the water consumption is accurate and adjustable, the pellets can be cooled to a certain temperature, the excessive high water content of the pellets is avoided, and the device not only achieves the effect of cooling the high-temperature pellets, but also achieves the effect of screening the pellets.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention discloses a direct reduced iron cooling and screening device which comprises a primary vibrating screen and a secondary vibrating screen, wherein the primary vibrating screen and the secondary vibrating screen are arranged in a gradually inclined mode, a rotary kiln chute is arranged at the input end of the primary vibrating screen, direct reduced iron materials are placed in the rotary kiln chute, an oversize heat-resistant adhesive tape conveyor is arranged at the output end of the secondary vibrating screen, spraying devices are arranged at the upper parts of the primary vibrating screen and the secondary vibrating screen at intervals, undersize chutes are jointly arranged at the lower parts of the primary vibrating screen and the secondary vibrating screen, and baffles are arranged on the bottom surfaces of the primary vibrating screen and the secondary vibrating screen.
Furthermore, the diameters of the screen holes of the secondary vibrating screen and the primary vibrating screen are the same.
Furthermore, spraying devices are arranged above the front position of the primary vibrating screen, above the rear position of the primary vibrating screen and above the middle of the secondary vibrating screen.
Furthermore, the undersize chute is a step-shaped chute, and an undersize heat-resistant rubber belt conveyor is arranged at the output end of the bottom of the undersize chute.
Furthermore, the baffle is respectively arranged at the bottom of the first-stage vibrating screen and the bottom of the second-stage vibrating screen in an inclined mode, and a spraying device is installed at the bottom of the transition position of the first-stage vibrating screen and the second-stage vibrating screen.
Furthermore, a temperature measuring device is arranged at the tail part of the secondary vibrating screen.
Further, the exterior of the spraying device is provided with a flowmeter and a valve.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention carries out water spray cooling above the front end position of the primary vibrating screen through the spray device, the water quantity is relatively large, the cooling speed of the high-temperature pellets is high, so that the temperature of the undersize materials is not overhigh, the spray devices above the rear end position of the primary vibrating screen and above the middle part of the secondary vibrating screen adopt spray cooling, the high-temperature pellets can expose the lower pellets after vibrating screening, the cooling is more uniform, the local high temperature is reduced, the spray cooling is carried out at the bottom of the transition position of the primary vibrating screen and the secondary vibrating screen, the temperature of the undersize materials is further reduced, the integral cooling mode is spray cooling, the water consumption is greatly reduced, the water consumption is accurately adjustable, the pellets can be reduced to a certain temperature, and the overhigh water content of the pellets is avoided.
(2) The undersize chute is a step-shaped chute, so that the blanking speed of materials can be reduced, and the materials are accumulated at the steps, so that the effect of material grinding is achieved, and the durability of the undersize chute is improved; the baffle can protect the lower spraying device and guide the material to the step chutes at the two sides of the undersize chute, so as to prevent the material from directly falling down and impacting the sealing-tape machine; the device has not only reached the effect of cooling high temperature pelletizing, has reached the effect of pelletizing screening simultaneously.
Drawings
Fig. 1 is an overall structural view of the present invention.
In the figure: 1. directly reducing iron materials; 2. chute of the rotary kiln; 3. a first-stage vibrating screen; 4. a secondary vibrating screen; 5. a heat-resistant rubber belt conveyor on the screen; 6. a screen down chute; 7. a undersize heat-resistant rubber belt conveyor; 8. a spraying device; 9. a temperature measuring device; 10. and a baffle plate.
Detailed Description
The invention is further described with reference to the following figures and examples:
example 1
As can be seen from fig. 1, the direct reduced iron cooling and screening device of the embodiment comprises a first-stage vibrating screen 3 and a second-stage vibrating screen 4, wherein the first-stage vibrating screen 3 and the second-stage vibrating screen 4 are arranged in a gradually inclined manner, an input end of the first-stage vibrating screen 3 is provided with a rotary kiln chute 2, a direct reduced iron material 1 is placed in the rotary kiln chute 2, an output end of the second-stage vibrating screen 4 is provided with an oversize heat-resistant adhesive tape conveyor 5, the upper parts of the first-stage vibrating screen 3 and the second-stage vibrating screen 4 are provided with a spraying device 8 and the first-, the lower part of the second-stage vibrating screen 4 is provided with an undersize chute 6, the undersize chute 6 is a step-shaped chute, the output end of the bottom of the undersize chute 6 is provided with an undersize heat-resistant rubber belt conveyor 7, the bottom surfaces of the first-stage vibrating screen 3 and the second-stage vibrating screen 4 are provided with baffles 10, and the baffles 10 are obliquely arranged at the bottom of the first-stage vibrating screen 3 and the bottom of the second-stage vibrating screen 4 respectively.
The diameters of the sieve pores of the second-stage vibrating sieve 4 and the first-stage vibrating sieve 3 are the same, and the tail part of the second-stage vibrating sieve 4 is provided with a temperature measuring device 9.
When the direct reduced iron material cooling device is used, the direct reduced iron material 1 is unloaded onto the primary vibrating screen 3 from the rotary kiln chute 2, when the direct reduced iron material is initially cooled, the water quantity of the four spraying devices 8 is fully opened, the temperature of the temperature measuring device 9 is monitored, and when the temperature measured by the temperature measuring device 9 is lower than 60 ℃, the valves of the spraying devices 8 above the rear end position of the primary vibrating screen 3 and above the middle part of the secondary vibrating screen 4 are adjusted to reduce the water quantity until the temperature of the temperature measuring device 9 is about 100 ℃; when the temperature of the temperature measuring device 9 is higher than 200 ℃, the discharge amount of the direct reduced iron material 1 is reduced.
The top of 3 front end positions of one-level shale shaker and the top of rear end positions department, the middle part top position department of second grade shale shaker 4 all is provided with spray set 8, spray set 8 is also installed with the bottom of 4 handing-over excessive positions departments of second grade shale shaker 3, spray set 8's outside is equipped with flowmeter and valve, spray set 8's water yield is adjustable, through the water yield size of adjusting spray set 8, make 3 tail department material temperature drop of one-level shale shaker to about 300 ℃, 4 tail departments of second grade shale shaker and sieve unloading material temperature drop to below 200 ℃.
The invention directly sprays and cools through the spraying device 8, the water consumption is small, the covering is uniform, the cooling efficiency is high, meanwhile, the surface of the cooled pellet does not have excessive water, the subsequent treatment of the cooled pellet is facilitated, the material temperature at the machine tail of the primary vibrating screen 3 is reduced to about 300 ℃ by adjusting the water quantity of the spraying device 8, and the material temperature at the machine tail of the secondary vibrating screen 4 and the material temperature below the screen is reduced to below 200 ℃.
The invention has the beneficial effects that: 1) a spraying device 8 is adopted to spray water and cool the upper part of the front end position of the primary vibrating screen 3, the water quantity is relatively large, and the cooling speed of the high-temperature pellets is high, so that the temperature of materials below the screen is not too high; 2) the spraying devices 8 above the rear end of the primary vibrating screen 3 and above the middle of the secondary vibrating screen 4 are cooled by spraying, and after high-temperature pellets are subjected to vibrating screening, lower-layer pellets can be exposed, so that the cooling is more uniform, and the local high temperature is reduced; 3) a spraying device 8 is also arranged at the bottom of the transition position of the first-stage vibrating screen 3 and the second-stage vibrating screen 4 for spraying and cooling, so that the temperature of the undersize materials is further reduced; 4) the whole cooling mode is spray cooling, the water consumption is greatly reduced, the water consumption is accurate and adjustable, the temperature of the pellets can be reduced to a certain temperature, and the overhigh water content of the pellets is avoided; 5) the undersize chute 6 is a step-shaped chute, so that the blanking speed of materials can be reduced, and the materials are accumulated at the steps, so that the effect of material grinding is achieved, and the durability of the undersize chute 6 is improved; 6) the baffle 10 can protect the lower spraying device 8 and guide the materials to the step chutes at the two sides of the undersize chute 6, so as to prevent the materials from directly falling down and impacting the sealing-tape machine; 7) the device has not only reached the effect of cooling high temperature pelletizing, has reached the effect of pelletizing screening simultaneously.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. The utility model provides a direct reduced iron cooling screening plant, includes one-level shale shaker (3), second grade shale shaker (4), its characterized in that: one-level shale shaker (3), second grade shale shaker (4) slope setting step by step, the input of one-level shale shaker (3) is provided with rotary kiln chute (2), direct reduction iron material (1) have been placed in rotary kiln chute (2), the output of second grade shale shaker (4) be provided with heat-resisting sticky tape conveyer on the sieve (5), the upper portion interval of one-level shale shaker (3), second grade shale shaker (4) is provided with spray set (8), the lower part of one-level shale shaker (3), second grade shale shaker (4) be provided with under the sieve chute (6) jointly, baffle (10) are all installed to the bottom surface of one-level shale shaker (3), second grade shale shaker (4).
2. The direct reduced iron cooling and screening apparatus according to claim 1, wherein: the diameters of the sieve pores of the secondary vibrating sieve (4) and the primary vibrating sieve (3) are the same.
3. The direct reduced iron cooling and screening apparatus according to claim 1, wherein: and a spraying device (8) is arranged above the front position of the primary vibrating screen (3), above the rear position of the primary vibrating screen and above the middle part of the secondary vibrating screen (4).
4. The direct reduced iron cooling and screening apparatus according to claim 1, wherein: the undersize chute (6) is a step-shaped chute, and an undersize heat-resistant rubber belt conveyor (7) is arranged at the output end of the bottom of the undersize chute (6).
5. The direct reduced iron cooling and screening apparatus according to claim 1, wherein: baffle (10) respectively in the bottom slope setting of one-level shale shaker (3), second grade shale shaker (4), spray set (8) are installed to the bottom of one-level shale shaker (3) and second grade shale shaker (4) handing-over transition position department.
6. The direct reduced iron cooling and screening apparatus according to claim 1, wherein: and a temperature measuring device (9) is arranged at the tail part of the secondary vibrating screen (4).
7. The direct reduced iron cooling and screening apparatus according to claim 1, wherein: the exterior of the spraying device (8) is provided with a flowmeter and a valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911233710.8A CN111014008A (en) | 2019-12-05 | 2019-12-05 | Direct reduced iron cooling and screening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911233710.8A CN111014008A (en) | 2019-12-05 | 2019-12-05 | Direct reduced iron cooling and screening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111014008A true CN111014008A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911233710.8A Pending CN111014008A (en) | 2019-12-05 | 2019-12-05 | Direct reduced iron cooling and screening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111014008A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875193A (en) * | 2022-02-28 | 2022-08-09 | 中冶华天工程技术有限公司 | Novel cooling and screening device and method for direct reduced iron |
| CN117815717A (en) * | 2024-03-05 | 2024-04-05 | 中海(山东)科技股份有限公司 | Waste water collecting device for large animal laboratory |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340378B1 (en) * | 1999-08-25 | 2002-01-22 | Kvaerner Metals | Method for screening hot briquetted direct reduced iron |
| CN203668439U (en) * | 2013-12-23 | 2014-06-25 | 江苏省冶金设计院有限公司 | Direct reduced iron cooling device for rotary hearth furnace |
| CN205425840U (en) * | 2016-03-21 | 2016-08-03 | 重庆钢铁(集团)有限责任公司 | Circular cooler gives ore device |
| CN205741089U (en) * | 2016-06-16 | 2016-11-30 | 江苏省冶金设计院有限公司 | A kind of DRI chiller |
| CN206597707U (en) * | 2017-01-22 | 2017-10-31 | 重庆工业职业技术学院 | A kind of sizing screening formula rice dedusting drying plant |
-
2019
- 2019-12-05 CN CN201911233710.8A patent/CN111014008A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340378B1 (en) * | 1999-08-25 | 2002-01-22 | Kvaerner Metals | Method for screening hot briquetted direct reduced iron |
| CN203668439U (en) * | 2013-12-23 | 2014-06-25 | 江苏省冶金设计院有限公司 | Direct reduced iron cooling device for rotary hearth furnace |
| CN205425840U (en) * | 2016-03-21 | 2016-08-03 | 重庆钢铁(集团)有限责任公司 | Circular cooler gives ore device |
| CN205741089U (en) * | 2016-06-16 | 2016-11-30 | 江苏省冶金设计院有限公司 | A kind of DRI chiller |
| CN206597707U (en) * | 2017-01-22 | 2017-10-31 | 重庆工业职业技术学院 | A kind of sizing screening formula rice dedusting drying plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875193A (en) * | 2022-02-28 | 2022-08-09 | 中冶华天工程技术有限公司 | Novel cooling and screening device and method for direct reduced iron |
| CN117815717A (en) * | 2024-03-05 | 2024-04-05 | 中海(山东)科技股份有限公司 | Waste water collecting device for large animal laboratory |
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Application publication date: 20200417 |
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