Lump ore drying system

Abstract

The utility model relates to the technical field of iron and steel smelting, and solves the problem that harmful gas is easy to leak in a lump ore drying system. The lump ore drying system comprises a drying bin arranged on the upstream of a lump ore bin and used for drying lump ore; the air blowing piece is arranged at the air inlet end of the drying bin and used for conveying hot air into the bin; the air draft part is arranged at the air outlet end of the drying bin and used for exhausting moisture in the bin; the air blowing frequency of the air blowing piece is smaller than the suction frequency of the air suction piece; and the dust removal part is arranged on the drying bin and used for collecting and treating dust generated in the drying process. The air blowing part and the air draft part are arranged at the air inlet end and the air outlet end of the drying bin correspondingly, the air blowing frequency of the air blowing part is controlled to be constantly smaller than the suction frequency of the air draft part, the interior of the drying bin is always kept in a micro-negative-pressure state, and meanwhile the operation frequency of the dust removal part is controlled to be interlocked with the air blowing frequency of the air blowing part and the suction frequency of the air draft part; and therefore, gas in the drying bin is prevented from escaping from the bin body.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel smelting technology, and in particular to a lump ore drying system. Background Technology

[0002] Lump ore is the main raw material for blast furnace ironmaking, accounting for about 12%. The amount of lump ore used determines the cost of ironmaking. Lump ore generally has high moisture content. Traditionally, it is dried using blast furnace gas, which can reduce the amount of lump ore powder entering the furnace, but this is costly and poses significant safety hazards. Furthermore, the lump ore bins are often kept in a humid environment, which can reduce their capacity, hindering the movement of materials in the blast furnace, causing a shortage of feedstock, and resulting in high labor intensity for personnel who need to clean the materials regularly.

[0003] To address the aforementioned moisture issue in lump ore, existing technologies typically involve installing a drying chamber upstream of the lump ore storage bin to dry the ore. However, the high-temperature environment within the drying chamber can easily induce a reduction reaction in some iron oxides within the lump ore.

[0004] Normally, although the temperature in the drying chamber is not as high as inside the blast furnace, it still reaches a certain level, causing some of the oxygen in the ore to react with carbon to produce carbon monoxide. Furthermore, during the drying process, a large amount of moisture evaporates from the ore, potentially creating a reducing atmosphere in certain areas, thus promoting carbon monoxide formation. Once carbon monoxide is formed, it risks escaping from the drying chamber and entering the atmosphere, harming the environment. Utility Model Content

[0005] The purpose of this invention is to provide a lump ore drying system that solves the problem of easy leakage of harmful gases in existing lump ore drying systems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a lump ore drying system, including:

[0008] A drying chamber, located upstream of the block ore bin, is used to dry the block ore transported to the block ore bin;

[0009] A blower is provided at the air inlet of the drying chamber and is used to deliver hot air into the drying chamber.

[0010] An exhaust fan is provided at the air outlet of the drying chamber to extract moisture from the drying chamber.

[0011] The blowing frequency of the blower is less than the suction frequency of the exhaust component;

[0012] A dust collector is installed on the drying chamber and is used to collect and process the dust generated during the drying process.

[0013] Furthermore, the dust removal frequency of the dust removal component is interlocked with the blowing frequency of the blower and the exhaust frequency of the exhaust component.

[0014] Furthermore, the dust removal component includes a dust removal duct and a fan; the dust removal duct is used to guide the flow of dust, and the fan is used to provide power for the dust removal process.

[0015] Furthermore, the dust removal duct is equipped with a temperature monitoring meter and an emergency exhaust fan; the temperature monitoring meter is used to monitor the airflow temperature inside the dust removal duct in real time; the emergency exhaust fan is used to provide emergency ventilation inside the dust removal duct.

[0016] Furthermore, a carbon monoxide concentration monitor is installed on the drying chamber, and the carbon monoxide concentration monitor is connected to the alarm signal.

[0017] Furthermore, an insulation layer is provided on the inner wall of the drying chamber to reduce heat loss within the drying chamber.

[0018] Furthermore, the thickness of the insulation layer is 50~100mm.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] This utility model discloses a lump ore drying system, which is equipped with a blower and an exhaust fan at the air inlet and outlet of the drying chamber, respectively. The blower frequency is controlled to be always less than the exhaust frequency, so that the drying chamber is always maintained in a slightly negative pressure state, thereby preventing the gas in the drying chamber from escaping from the chamber.

[0021] Furthermore, by installing dust removal components on the drying chamber and interlocking the operating frequency of the dust removal components with the blowing frequency of the blower and the suction frequency of the exhaust components, the dust in the drying chamber is removed while ensuring that the slight negative pressure state inside the chamber is not disrupted, preventing gas from escaping from the chamber and affecting the safety of the external environment. Attached Figure Description

[0022] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 This is a plan view of a lump ore drying system provided by this utility model;

[0024] Figure 2 This is a schematic diagram of the interlocking control provided by this utility model;

[0025] The reference numerals in the attached figures are explained as follows:

[0026] 1. Drying chamber; 101. Carbon monoxide concentration monitor; 102. Alarm; 103. Insulation layer; 104. Oxygen concentration monitor; 2. Blower; 3. Exhaust fan; 4. Dust removal unit; 401. Dust removal duct; 4010. Temperature monitor; 4011. Emergency exhaust fan; 402. Fan; 5. Interlock controller. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In this embodiment of the utility model, a lump ore drying system is provided, such as... Figure 1 As shown, it specifically includes a block ore bin 1, a blower 2, an exhaust fan 3, and a dust collector 4.

[0029] Specifically, the drying chamber 1 is located upstream of the lump ore bin and is used to dry the lump ore transported to the bin, thereby reducing its moisture content and improving the efficiency and safety of blast furnace ironmaking. The length of the drying chamber 1 can be adjusted according to production needs. Furthermore, the drying chamber 1 is not limited to being located upstream of the lump ore bin; it can also be located downstream, and its specific location can be changed as needed.

[0030] The aforementioned drying chamber 1 includes an air inlet and an air outlet. In this embodiment, a blower 2 is provided at the air inlet, and an exhaust 3 is provided at the air outlet. The blower 2 is used to blow air from an external heat source into the drying chamber 1, thereby drying the wet ore blocks inside the chamber and removing water vapor from the ore blocks. The exhaust 3 is used to extract moisture from the drying chamber 1, accelerating the drying process of the ore blocks.

[0031] For the aforementioned external heat source, the residual heat from sintering can be used as the heat source, or microwave composite flue gas can be used as the heat source. Other media that can be used as heat sources can be applied to the drying chamber 1 to achieve the drying operation.

[0032] To prevent the gas generated inside the drying chamber 1 from escaping, in this embodiment, the blowing frequency of the blower 2 is set to be lower than the suction frequency of the exhaust 3. During operation, because the air volume of the blower 2 is slightly less than that of the exhaust 3, the air inside the chamber is drawn out at a speed slightly greater than it enters, thus creating a slightly negative pressure state inside the chamber. Under this slightly negative pressure state, the pressure inside the chamber is lower than the external atmospheric pressure, and this pressure difference prevents gas from flowing from inside the chamber to the outside.

[0033] In this embodiment, a dust collector 4 is also installed at the top of the drying chamber 1 to collect and treat the dust generated during the drying process, prevent dust from overflowing, protect the environment, and avoid dust accumulation affecting the normal operation of the drying chamber 1. Specifically, the dust collector 4 includes a dust collection pipe 401 and a fan 402. The dust collection pipe 401 is used to guide the flow of dust and collect and treat the dust from inside the drying chamber 1; the fan 402 provides power for the dust collection process.

[0034] In this embodiment, see Figure 2 The operating frequency of the dust collector 4 is interlocked with the blowing frequency of the blower 2 and the suction frequency of the exhaust fan 3 by the interlock controller 5. Through this interlock control method, the dust collection frequency can be automatically adjusted according to the actual situation of the blower and exhaust fan, ensuring effective dust removal under different operating conditions, improving the stability and reliability of the system, and reducing energy waste.

[0035] The aforementioned dust removal duct 401 is also equipped with a temperature monitoring meter 4010 and an emergency exhaust fan 4011. The temperature monitoring meter 4010 is used to monitor the temperature inside the dust removal duct 401 in real time to prevent excessively high or low temperatures from affecting the dust removal effect or causing safety hazards. The emergency exhaust fan 4011 is used to provide emergency ventilation inside the dust removal duct 401. It can be quickly activated in case of a malfunction in the exhaust system of the fan 402 or other emergencies, ensuring the normal operation of the system and the safety of the operators.

[0036] In addition, the drying chamber 1 is equipped with a carbon monoxide concentration monitor 101 and an oxygen concentration monitor 104, both of which are connected to the alarm 102. When the carbon monoxide and oxygen concentration monitors 101 and 104 detect that the carbon monoxide and oxygen concentrations in the drying chamber 1 exceed the set thresholds, the alarm 102 will sound an alarm to remind the operators to take appropriate measures to prevent dangerous accidents and ensure the safety of the operators.

[0037] In this embodiment, a heat insulation layer 103 is also provided on the inner wall of the drying chamber 1. The heat insulation layer 103 is made of a material with high temperature resistance and good heat insulation performance. By providing the heat insulation layer 103, heat loss in the drying chamber 1 can be effectively reduced, heat energy utilization efficiency can be improved, drying costs can be reduced, and the service life of the drying chamber 1 can be extended. The thickness of the heat insulation layer 103 is 50~100mm. The thickness of the heat insulation layer 103 can be reasonably selected according to different drying needs and environmental conditions to ensure good heat insulation effect without increasing costs or affecting the structural strength of the drying chamber 1 due to excessive thickness.

[0038] In summary, the lump ore drying system disclosed in this utility model integrates a drying chamber 1, a blower 2, an exhaust fan 3, and a dust collector 4. Through reasonable structural design and interlocking control, it effectively solves the problem of easy leakage of harmful gases in existing lump ore drying systems, improves drying efficiency and safety, and reduces operating costs, thus having significant practical value.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A lump ore drying system, characterized by, The application relates to a block ore drying device. The application comprises: a drying bin (1) arranged upstream of a block ore bin and used for drying block ore conveyed into the block ore bin; an air blowing device (2) arranged at an air inlet end of the drying bin (1) and used for conveying hot air into the drying bin (1); an air extraction device (3) arranged at an air outlet end of the drying bin (1) and used for extracting moisture in the drying bin (1); the air blowing frequency of the air blowing device (2) is less than the air extraction frequency of the air extraction device (3); 2. A lump ore drying system as claimed in claim 1, wherein, a dust removal device (4) arranged on the drying bin (1) and used for collecting and treating dust generated in the drying process.

3. A lump ore drying system as claimed in claim 1, wherein, The operation frequency of the dust removal device (4) is interlocked with the air blowing frequency of the air blowing device (2) and the air extraction frequency of the air extraction device (3).

4. A lump ore drying system as claimed in claim 3, wherein, The dust removal device (4) comprises a dust removal pipeline (401) and a fan (402); the dust removal pipeline (401) is used for guiding dust flow, and the fan (402) is used for providing power for the dust removal process.

5. A lump ore drying system as claimed in claim 1, wherein, A temperature monitoring meter (4010) and an emergency exhaust fan (4011) are arranged in the dust removal pipeline (401); the temperature monitoring meter (4010) is used for monitoring the air flow temperature in the dust removal pipeline (401) in real time; and the emergency exhaust fan (4011) is used for performing emergency exhaust on the dust removal pipeline (401).

6. A lump ore drying system as claimed in claim 1, wherein, A carbon monoxide concentration monitoring meter (101) is arranged on the drying bin (1) and is signal connected with an alarm (102).

7. A lump ore drying system as claimed in claim 6, wherein A heat preservation layer (103) is arranged on the inner wall of the drying bin (1) and is used for reducing heat loss in the drying bin (1). The thickness of the heat preservation layer (103) is 50-100 mm.

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