WO2021218106A1

WO2021218106A1 - Device and method for drying lump ore in storage yard by utilizing sintering ring cooling waste gas

Info

Publication number: WO2021218106A1
Application number: PCT/CN2020/127718
Authority: WO
Inventors: 李军; 李泽宇; 赵忆静
Original assignee: 昆山宇顺环保科技有限公司
Priority date: 2020-04-30
Filing date: 2020-11-10
Publication date: 2021-11-04
Also published as: CN111351369A; ZA202108676B

Abstract

The present invention relates to a device and method for drying lump ore in a storage yard by utilizing sintering ring cooling waste gas. In the present invention, during the stacking of lump ore in a storage yard, sintering ring cooling waste gas with a temperature higher than 100ºC is introduced into uniformly distributed distribution pipes from the lower part of a ground plane, the pressurized sintering ring cooling waste gas penetrates lump ore to be dried and then is discharged from the upper portion of the lump ore to be dried, passes through a movable gas collecting hood arranged on the upper portion of the lump ore to be dried, then enters a newly-arranged waterproof bag-type dust collector to be purified, and then is discharged after reaching a standard. In order to guarantee the air permeability of the lump ore to be dried, dried and screened ore with a thickness of 500-1000 mm is laid on the upper portions of the distribution pipes to serve as a bottoming air permeable layer, such that it can be guaranteed that an air outlet is smooth and a drying apparatus is prevented from being damaged by stacking and taking operations.

Description

Device and method for drying lump ore in storage yard by using sintering ring cooling waste gas

Technical field

The invention belongs to the technical field of metallurgy and environmental protection. Specifically, it relates to a device and method for drying lump ore in a storage yard by using sintering ring cooling waste gas.

Background technique

Lump ore is a main raw material used in the production of metallurgical industry. It is a raw ore with a certain particle size after being mined from a mine and subjected to damage screening and processing. During the mining process, the block stone often needs to be drawn with water and dust suppression treatment. The dust formed during the mining process will adhere to the surface of the mine after being immersed in water, and is not easy to be screened and removed, which will entrain a large amount of powder into the metallurgical reduction process, which will eventually cause the charge to ventilate Sexual deterioration. Although modern metallurgical production processes are equipped with powerful screening devices, the strong adhesion of water-containing dust makes it impossible to effectively separate the ore and its surface powder. At the same time, lump ore is a kind of main raw material used directly, and generally only stays in the raw material warehouse of the storage yard and metallurgical furnace. The storage capacity of the storage yard can achieve long-term storage. In the past, sunlight exposure was used. Dewatering the surface of the lump ore, and finally realize the separation of the ore and the adhering powder, but a dump truck is needed to turn the material. Not only the workload is small, but the dust during the turning process is serious. The storage layer should not be too thick, otherwise the material cannot be turned. Operation and effectively reduce the surface moisture of lump ore.

Summary of the invention

In view of the above-mentioned problems, the purpose of the present invention is to provide a device and method for drying lump ore in a storage yard by using sintering ring cooling waste gas in response to the problems raised by the background art. Drying, so that the ore is effectively separated from the surface dust.

In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

A device for drying lump ore in a storage yard using sintering ring cooling waste gas, which includes a ring cooler, an induced draft fan, a distribution pipe, a lump drying device, and a discharge pipe. The sintering ring cooling waste gas generated by the ring cooler is passed through The flue enters the induced draft fan, and the induced draft fan is connected with the distribution pipe. There are several drying branch pipes installed on the distribution pipe, and each drying branch pipe is equipped with a valve. The lump ore drying device includes the silo body with the open end at the upper end and sliding The air collecting hood, the drying branch pipe is connected with the lower end of the main body of the silo. The induced draft fan can inject the sintering ring cooling waste gas into the main body of the silo through the distribution pipe and the drying branch pipe. The main body of the silo is equipped with a layer of dried and screened ore as a bottom layer for ventilation Layer, the lump to be dried is laid on the bottom ventilation layer. The upper end of the bin body is provided with a track along its length. When the sliding air collecting cover is completely covered on the main body of the warehouse, the upper end of the sliding air collecting cover can seal the upper end of the main body of the warehouse, and the upper end of the sliding air collecting cover is connected with the discharge pipe. The sintering ring cooling waste gas is discharged from the discharge pipe.

In order to optimize the above-mentioned structural form, the specific measures taken also include:

The front end of the above-mentioned discharge pipe is connected with the upper end of the sliding air collecting hood, the back end is connected with the bag filter, the bag filter is connected with the dust removal fan, and the dust removal fan is connected with the chimney. Circulating cold exhaust gas is discharged from the chimney after being dusted by the bag filter.

The lower end of the above-mentioned sliding air-collecting hood is provided with a sealing rubber strip, and when the sliding air-collecting hood is completely covered on the warehouse main body, the sliding air-collecting hood is sealed and attached to the upper end of the warehouse main body through the sealing rubber.

A protective cap is provided at the connection between the lower surface of the bin body and the drying branch pipe. The protective cap is a cover with fine holes on the surface to prevent ore particles from falling into the drying branch pipe.

The thickness of the above-mentioned breathable layer for the bottom covering is 500-1000 mm.

The above-mentioned lump ore drying device is located on the empty ground of the storage yard, and the distribution pipe runs under the storage yard.

A method for drying lump ore in a storage yard using sintering ring cooling waste gas, including the following steps:

Step 1. A layer of dried and sieved ore is laid in the main body of the bin as the bottom breathable layer, the lump ore to be dried is laid on the bottom breathable layer, and then the sliding gas collecting hood is slid on the main body of the bin to make the sliding collection The air hood completely covers the upper part of the main body of the silo, check the sealing between the sliding air collecting hood and the main body of the silo, so that there is no obvious air leakage point between the sliding air collecting hood and the main body of the silo;

Step 2: Use the induced draft fan to extract the hot sintering ring cooling waste gas from the ring cooler, and send it to the distribution pipe located in the storage yard through the pipeline;

Step 3: Adjust the valve of each distribution pipe to balance the amount of exhaust gas flowing through the distribution pipe. The hot exhaust gas in the distribution pipe enters the bottom ventilation layer through the protective cap and then the lump to be dried is dried;

Step 4. The hot exhaust gas passing through the lump ore to be dried becomes wet exhaust gas, enters the exhaust pipe through the sliding air collecting hood, and is purified by the bag filter, and then sent to the chimney by the dust removal fan to meet the discharge standards;

Step 5. When the lump ore to be dried is dried, close the valve and stop the induced draft fan, move the sliding air collecting hood along the track, start stacking and reclaiming the lump ore, and remove it when the stacking operation is completed After the stacker, add new lump ore to be dried, and then move the sliding gas collecting hood to completely cover the top of the bin body again;

Step 6: Repeat steps 2 to 5 until all the lump ore to be dried are dried and the stacking and reclaiming operation is completed.

The invention uses lump ore to pass the sintering ring cooling waste gas above 100°C into the evenly distributed distribution pipe from below the ground level during the storage of the lump ore, so that the pressurized sintering ring cooling waste gas penetrates the to-be-dried After the lump ore is discharged from the upper part of the lump ore to be dried, it passes through the mobile gas collecting hood set on the upper part of the lump ore to be dried, and then enters the newly installed waterproof cloth bag dust collector to be purified and discharged to the standard. In order to ensure the air permeability of the lump ore to be dried, a 500-1000mm thick dried and sieved ore is laid on the upper part of the distribution pipe as a bottom air-permeable layer, so as to ensure that the air outlet is unblocked and prevent stacking and reclaiming operations from affecting the drying equipment Damage. The invention also has the following significant advantages: 1. The lump ore drying can be achieved by using the characteristics of large storage volume and long storage period of the stockyard, and a small amount of modification to the bottom of the original stockyard can realize the drying of lump ore, and the investment cost is Low; 2. Use the waste heat of the sintering ring cooling exhaust gas to dry the lump ore, which is fast and has a good drying effect; 3. The use of mobile gas collecting hood facilities can avoid the impact on stacking and reclaiming operations; 4. Configuration on the distribution pipe The protective cap can reduce the damage of the upper material layer to the drying setting, and can also prevent the upper material from accumulating on the distribution pipe and blocking the smooth discharge of the drying medium.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention.

Figure 2 is a schematic diagram of the sliding air collecting hood completely covering the main body of the warehouse;

Fig. 3 is a schematic diagram of the sliding air collecting hood sliding away from the main body of the bin.

Among them, the reference signs are: annular cooler 1, flue 11, induced draft fan 2, distribution pipe 3, drying branch pipe 31, valve 32, lump drying device 4, bin main body 41, sliding air collecting hood 42, paving bottom The breathable layer 43, the lump to be dried 44, the track 45, the roller 46, the protective cap 47, the discharge pipe 5, the bag filter 6, the dust removal fan 7, and the chimney 8.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The device of this embodiment uses sintering ring cooling waste gas to dry lump ore in a storage yard, including: ring cooler 1, induced draft fan 2, distribution pipe 3, lump drying device 4 and discharge pipe 5, ring The sintering ring cooling waste gas produced by the refrigerator 1 enters the induced draft fan 2 through the flue 11, and the induced draft fan 2 is connected with the distribution pipe 3. A number of drying branch pipes 31 are installed on the distribution pipe 3, and each drying branch pipe 31 is installed Valve 32, lump ore drying device 4 includes a bin main body 41 with an open upper end and a sliding air collecting hood 42, the drying branch pipe 31 is connected to the lower end of the bin main body 41, and the induced draft fan 2 can pass the sintering ring cooling waste gas through the distribution pipe 3 And the drying branch pipe 31 are injected into the bin body 41. The bin body 41 is provided with a layer of dried and sieved ore as the bottom ventilation layer 43. The lump ore 44 to be dried is laid on the bottom ventilation layer 43, and the upper end of the bin body 41 A rail 45 is provided along its length, and a roller 46 is provided at the lower end of the sliding air collecting hood 42. The roller 46 can roll on the rail 45, so as to completely cover the sliding air collecting hood 42 on the bin main body 41 or from the bin main body 41. When the sliding gas collecting hood 42 is completely covered on the bin main body 41, the sliding gas collecting hood 42 can seal the upper end of the bin main body 41. The upper end of the sliding gas collecting hood 42 is connected with the discharge pipe 5 and is cooled by the sintered ring of the bin main body 41. The exhaust gas is discharged from the discharge pipe 5.

In the embodiment, the front end of the discharge pipe 5 is connected to the upper end of the sliding air collecting hood 42, the back end is connected to the bag filter 6, the bag filter 6 is connected to the dust removal fan 7, the dust removal fan 7 is connected to the chimney 8, and the dust removal fan 7 is connected to the discharge pipe 5. A negative pressure is generated, so that the sintering ring-cooled waste gas discharged from the discharge pipe 5 is dedusted by the bag filter 6 and then discharged from the chimney 8.

In the embodiment, the lower end of the sliding air collecting cover 42 is provided with a sealing rubber strip. When the sliding air collecting cover 42 is completely covered on the bin main body 41, the sliding air collecting cover 42 is sealed and attached to the upper end of the bin main body 41 through the sealing rubber strip.

In the embodiment, a protective cap 47 is provided at the connection between the lower surface of the bin body 41 and the drying branch pipe 31. The protective cap 47 is a cover with fine holes on the surface to prevent ore particles from falling into the drying branch pipe 31.

In the embodiment, the thickness of the bottom-laying breathable layer 43 is 500-1000 mm.

In the embodiment, the lump drying device 4 is located on the empty ground of the storage yard, and the distribution pipe 3 runs under the storage yard.

Step 1. A layer of dried and sieved ore is laid in the bin main body 41 as the bottom breathable layer 43, the lump ore 44 to be dried is laid on the bottom breathable layer 43, and then the sliding air collecting hood 42 is placed on the bin main body 41 Slide up to make the sliding air collecting hood 42 completely cover the top of the warehouse main body 41, check the sealing between the sliding air collecting hood 42 and the warehouse main body 41, and make sure that there is no obvious air leakage point between the sliding air collecting hood 42 and the warehouse main body 41;

Step 2: Use the induced draft fan 2 to extract the hot sintering ring cooling waste gas from the ring cooler 1 and send it to the distribution pipe 3 located in the storage yard through the pipeline;

Step 3: Adjust the valve 32 of each distribution pipe 3 to balance the amount of exhaust gas flowing through the distribution pipe 3. The hot exhaust gas in the distribution pipe 3 enters the bottom breathable layer 43 through the protective cap 47 and then the lump ore 44 to be dried is dried ；

Step 4. The hot exhaust gas passing through the lump ore 44 to be dried becomes wet exhaust gas, enters the discharge pipe 5 through the sliding air collecting hood 42, and is purified by the bag filter 6 and then dusted, and then sent by the dust removal fan 7 Chimney 8 meets emission standards;

Step 5. After the lump ore 44 to be dried is dried, close the valve 32 and stop the induced draft fan 2, move the sliding air collecting hood 42 along the track 45, and start stacking and reclaiming the lump ore. After the operation is completed and the stacker is removed, new lump ore 44 to be dried is added, and then the sliding gas collecting hood 42 is moved to completely cover the top of the bin body 41 again;

Step 6. Repeat steps 2 to 5 until all the lump ore 44 to be dried is dried and the stacking and reclaiming operation is completed.

The drying of the present invention starts the drying operation only after the stacking is completed and the air collecting hood is adjusted, and the reclaiming operation can only be carried out after the drying is stopped and the air collecting hood is removed.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments. All technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

A device for drying lump ore in a storage yard using sintering ring cooling waste gas, which is characterized in that it includes a ring cooler (1), an induced draft fan (2), a distribution pipe (3), and a lump ore drying device (4) And the discharge pipe (5), the sintering ring cooling exhaust gas produced by the ring cooler (1) enters the induced draft fan (2) through the flue (11), and the induced draft fan (2) is connected with the distribution pipe (3) A plurality of drying branch pipes (31) are installed on the distribution pipe (3), a valve (32) is installed on each drying branch pipe (31), and the lump ore drying device ( 4) Including the silo body (41) whose upper end is an open end and a sliding air collecting hood (42), the drying branch pipe (31) is connected to the lower end of the silo body (41), and the induced draft fan (2) can remove the sintered ring The cold waste gas is injected into the bin main body (41) through the distribution pipe (3) and the drying branch pipe (31), and a layer of dried and screened ore is arranged in the bin main body (41) as a bottom air-permeable layer (43), The lump ore (44) to be dried is laid on the bottom-laying air-permeable layer (43), the upper end of the bin main body (41) is provided with a rail (45) along its length, and the sliding air collecting hood (42) The lower end is provided with a roller (46), the roller (46) can roll on the track (45), so as to completely cover the sliding air collecting hood (42) on the bin main body (41) or from the bin main body (41) When the sliding air collecting hood (42) is completely covered on the main body (41), the sliding air collecting hood (42) can seal the upper end of the main body (41), and the sliding air collecting hood (42) can seal the upper end of the main body (41). The upper end of the cover (42) is connected with the discharge pipe (5), and the cold exhaust gas is discharged from the discharge pipe (5) through the sintering ring of the bin main body (41).
A device for drying lump ore in a storage yard using sintering ring cooling waste gas according to claim 1, characterized in that: the front end of the discharge pipe (5) is connected with the upper end of the sliding gas collecting hood (42), and the rear The end is connected to the bag filter (6), the bag filter (6) is connected to the dust removal fan (7), the dust removal fan (7) is connected to the chimney (8), and the dust removal fan (7) generates a negative pressure on the discharge pipe (5), The sintering ring cooling waste gas discharged from the discharge pipe (5) is dust-removed by the bag filter (6), and then discharged from the chimney (8).
A device for drying lump ore in a storage yard using sintering ring cooling waste gas according to claim 2, characterized in that: the lower end of the sliding gas collecting hood (42) is provided with a sealing rubber strip, and the When the sliding air collecting cover (42) is completely covered on the bin main body (41), the sliding air collecting cover (42) is sealed and attached to the upper end of the bin main body (41) through a sealing rubber strip.
A device for drying lump ore in a storage yard using sintering ring cooling waste gas according to claim 3, characterized in that: the lower surface of the bin main body (41) and the drying branch pipe (31) are connected with A protective cap (47), the protective cap (47) is a cover with fine holes on the surface, and is used to prevent ore particles from falling into the drying branch pipe (31).
The device for drying lump ore in a storage yard using sintering ring cooling waste gas according to claim 1, characterized in that: the thickness of the bottom-laying gas-permeable layer (43) is 500-1000 mm.
A device for drying lump ore in a storage yard using sintering ring cooling waste gas according to claim 4, characterized in that: the lump ore drying device (4) is located on the empty ground of the storage yard, and the The distribution pipe (3) runs under the storage yard.
The method for drying lump ore in a storage yard using sintering ring cooling waste gas as claimed in claim 6, characterized in that it comprises the following steps:

Step 1. A layer of dried and sieved ore is placed in the main body (41) of the bin as the bottom ventilation layer (43), and the lump ore (44) to be dried is laid on the bottom ventilation layer (43), and then slides The air collecting hood (42) slides on the bin main body (41) so that the sliding air collecting hood (42) completely covers the upper part of the bin main body (41). Check the sealing of the sliding air collecting hood (42) and the bin main body (41) to make There is no obvious air leakage point between the sliding air collecting hood (42) and the main body (41);

Step 2: Use the induced draft fan (2) to extract the hot sintering ring cooling waste gas from the ring cooler (1), and send it to the distribution pipe (3) located in the storage yard through the pipeline;

Step 3: Adjust the valve (32) of each distribution pipe (3) to balance the amount of exhaust gas flowing through the distribution pipe (3). The hot exhaust gas in the distribution pipe (3) enters the bottom breathable layer through the protective cap (47). 43) The lump ore to be dried (44) is dried afterwards;

Step 4. The hot exhaust gas passing through the lump ore (44) to be dried becomes wet exhaust gas, enters the discharge pipe (5) through the sliding air collecting hood (42), and then is purified by the bag filter (6) and then dedusted Then, it is sent to the chimney (8) by the dust removal fan (7) to meet the emission standards;

Step 5. When the lump ore (44) to be dried is dried, close the valve (32) and stop the induced draft fan (2), move the sliding air collecting hood (42) along the track (45), and align the block The ore starts stacking and reclaiming operations. When the stacking operation is completed and the stacker is removed, add new lump ore to be dried (44), and then move the sliding air collecting hood (42) to completely cover the bin body (41) again Above

Step 6: Repeat steps 2 to 5 until all the lump ore (44) to be dried is dried and the stacking and reclaiming operation is completed.