Mine structure with anti-freezing and heating functions

Abstract

This utility model relates to a mine silo structure with antifreeze and heating functions. It includes a silo body composed of a cylindrical section, a conical section, and a silo top structure. It also includes several rows of heat exchange pipe fixing frames, heat exchange pipes, and an outer protective layer. The heat exchange pipe fixing frames are spirally arranged on the outer wall of the silo body. One end of each heat exchange pipe serves as a water inlet and is fixed to the lower end of the cylindrical section of the silo body. The heat exchange pipes are evenly distributed diagonally along the fixing frames on the outer wall of the silo body, forming a spiral arrangement segment, and then vertically downwards to form a vertical segment. The outer protective layer is located outside the heat exchange pipe fixing frames and the heat exchange pipes. The water inlet of the heat exchange pipes is connected to the heating network's water supply pipe; the water outlet is connected to the heating network's return water pipe. Venting / draining valves are provided at both the water inlet and outlet. Its advantages are: using heat exchange pipes to heat the silo effectively prevents the material inside from freezing and thaws frozen material; it is also convenient and easy to operate.

Description

Technical Field

[0001] This utility model belongs to the technical field of mine storage structure, and specifically relates to a mine storage structure with antifreeze and heating functions. Background Technology

[0002] The ore bin in a mineral processing plant is a temporary storage facility for crushed bulk ore in the mineral processing production process of small and medium-sized mines. It is a crucial link between fine ore and grinding operations. Normal ore storage and smooth unloading within the bin are essential for continuous production processes and are also necessary for the efficient operation of the ball mill. Due to the moisture content of the bulk ore and the cold climate in frigid regions, the moisture-containing material in the bin often freezes due to low temperatures, preventing a continuous and stable supply to subsequent production processes and causing prolonged shutdowns of the production system due to material shortages.

[0003] Chinese patent (CN104097869A) discloses a process for preventing freezing and de-icing independent mine bins on the surface of mines in extremely cold regions. It employs a hot air furnace to "heat the ore inside the bin and at the outlet to prevent freezing, or to thaw already frozen ore." This method is widely applicable to newly built and existing steel independent mine bins on the surface of mines, solving the problem of frozen materials inside the bin due to cold weather, which prevents a continuous and stable supply to subsequent processes. The process sequence for ore that has not yet frozen is: drying → antifreeze → thawing at the bin outlet. The process sequence for ore that has already frozen is: thawing inside the bin → thawing at the bin outlet → drying → antifreeze → thawing at the bin outlet. However, since mine bins cannot be completely sealed, using hot air heating results in significant energy waste, and the process is relatively complex, with less than ideal thawing results. Utility Model Content

[0004] The purpose of this invention is to provide a mine storage structure with antifreeze and heating functions to solve the problems of preventing material freezing and thawing frozen materials in extremely cold regions.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A mine storage structure with antifreeze and heating functions includes a mine storage body, which comprises a cylindrical section, a conical section disposed in the lower part of the cylindrical section, and a storage top structure disposed in the upper part of the cylindrical section. The structure is characterized by further including several rows of heat exchange pipe fixing brackets, heat exchange pipes, and an outer protective layer. The several rows of heat exchange pipe fixing brackets are disposed on the outer wall of the mine storage body and are welded from the bottom of the cylindrical section of the outer wall of the mine storage body along a spiral trajectory with a horizontal arc length and a vertical distance, up to the upper end of the cylindrical section. One end of each heat exchange pipe is fixed as a water inlet to the lower end of the cylindrical section of the mine storage body, with the water inlet extending out of the mine storage body. Outside the main body, the entire heat exchange tube is evenly and obliquely arranged on the outer wall of the ore bin body along the fixing frame, forming a spiral arrangement structure section at the upper end of the ore bin body, and then forming a vertical section vertically downwards in the opposite direction. The end of the vertical section is the water outlet, extending to the connection between the cylindrical part and the conical part. Its water outlet extends out of the ore bin body. The outer protective layer is set on the outside of the heat exchange tube fixing frame and the heat exchange tube. The water inlet of the heat exchange tube is connected to the heating network water supply pipe through valve A1. The water outlet is connected to the heating network return water pipe through valve B1. Air release / water release valve A2 and air release / water release valve B2 are respectively provided at the water inlet and water outlet of the heat exchange tube.

[0007] As a further description of the above technical solution: the pitch of the spiral arrangement structure segment is 200mm to 400mm.

[0008] As a further description of the above technical solution: the aforementioned rows of fixing frames are welded from the bottom of the cylindrical part of the outer wall of the ore bin body along the circumference of the ore bin body in a spiral trajectory with a horizontal arc length L=1.0m~1.5m and a vertical distance h=200mm~400mm, until the upper end of the ore bin body.

[0009] As a further description of the above technical solution: the ore bin body is a steel ore bin body or a concrete ore bin body.

[0010] As a further description of the above technical solution: the outer protective layer is made of rock wool material with good fire resistance, high temperature resistance and durability. The vertical section of the heat exchange pipe is wrapped inside the rock wool material outer protective layer. The water inlet and outlet of the heat exchange pipe both extend out of the rock wool material outer protective layer and are set perpendicular to the steel mine silo body or the concrete mine silo body.

[0011] The beneficial effects of adopting the above technical solution are as follows: In cold weather, this utility model uses heat exchange pipes to heat the ore bin, effectively preventing freezing of materials inside the bin and thawing frozen materials. It is also convenient and easy to operate, and makes full use of the plant's heating system. Furthermore, this utility model can effectively preheat the ore powder, which helps to increase the slurry temperature and improve the mineral processing effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 A-A cross-section;

[0014] Figure 3 yes Figure 1 A magnified view of a portion of point B. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] like Figures 1-3 As shown, a mine storage structure with antifreeze and heating functions includes a mine storage body, which includes a cylindrical part 1, a conical part 2 disposed in the lower part of the cylindrical part, and a storage top structure 6 disposed in the upper part of the cylindrical part. The structure is characterized by further including several heat exchange pipe fixing brackets 3, heat exchange pipes 4, and an outer protective layer 5. The several heat exchange pipe fixing brackets 3 are disposed on the outer wall of the mine storage body, starting from the bottom of the cylindrical part 1 on the outer wall of the mine storage body, and are welded along the circumference of the mine storage body in a spiral trajectory with a horizontal arc length and vertical distance, up to the upper end of the cylindrical part 1; the several heat exchange pipe fixing brackets 3 start from the bottom structure of the outer wall of the mine storage body, and are welded along the circumference of the mine storage body in a spiral trajectory with a horizontal arc length L = 1.0m to 1.5m and a vertical distance h = 200mm to 400mm, up to the upper end of the mine storage body.

[0017] The heat exchange tube of this utility model is a PERT tube with a diameter of Φ20mm, Φ25mm, or Φ32mm. One end of the heat exchange tube is fixed to the lower end of the cylindrical part 1 of the ore bin body as a water inlet 41, and its water inlet 41 extends out of the ore bin body. The entire heat exchange tube is evenly distributed obliquely on the outer wall of the ore bin body along the fixing frame, forming a spiral arrangement structure section 42 at the upper end of the ore bin body. The pitch of the spiral arrangement structure section 42 is 200mm~400mm. Then, a vertical section 43 is formed vertically downward in the opposite direction. The end of the vertical section 43 is the water outlet 44, which extends to the connection between the cylindrical part 1 and the conical part 2. Its water outlet 44 extends out of the ore bin body. The outer protective layer 5 is set on the heat exchange tube fixing. The outer protective layer is made of rock wool material with good fire resistance, high temperature resistance and durability. The vertical section of the heat exchange pipe is wrapped inside the rock wool material outer protective layer. The water inlet and outlet of the heat exchange pipe extend out of the rock wool material outer protective layer and are set perpendicular to the steel mine silo body or concrete mine silo body. The water inlet 41 of the heat exchange pipe is connected to the heating network water supply pipe 7 through valve A1. The water outlet 44 is connected to the heating network return water pipe 8 through valve B1. Air release / water release valve A2 and air release / water release valve B2 are respectively provided at the water inlet 41 and water outlet 42 of the heat exchange pipe.

[0018] The ore bin body described in this utility model is a steel ore bin body or a concrete ore bin body.

[0019] The outer protective layer 5 of this utility model is made of rock wool material with good fire resistance, high temperature resistance and durability. The vertical section of the heat exchange pipe is wrapped in the outer protective layer of rock wool material. The water inlet end 41 and the water outlet end 42 of the heat exchange pipe both extend out of the outer protective layer of rock wool material and are set perpendicular to the steel mine silo body or the concrete mine silo body.

[0020] The working principle of this utility model is as follows:

[0021] When the ambient temperature is below 0℃, open valves A1 and B1, and discharge the air in the heat exchange tube through the vent / drain valve B2. Then close the vent / drain valve B2 and open valves A1 and B1 to achieve hot water circulation, allowing the heat exchange tube to enter the heat dissipation working state, heating the ore bin wall, and transferring heat to the material inside the bin through the bin wall, effectively preventing the material inside the bin from freezing. Example

[0022] The main body of the newly built surface steel ore bin in a certain mine has a designed diameter of 4.0m, and the bin wall is made of 16Mn steel plate with a thickness d of 24mm rolled and welded.

[0023] On the outer wall of the steel ore bin body, starting from the bottom of the cylindrical part 1 of the outer wall of the ore bin body, spiral traces are welded along the circumference of the ore bin body in a horizontal arc length and vertical distance, up to the upper end of the cylindrical part 1; the plurality of heat exchange pipe row fixing brackets 3 start from the bottom structure of the outer wall of the ore bin body, along the circumference of the ore bin body in a horizontal arc length L=1.1m and a vertical distance h=250mm. The spiral trajectory welding continues until the upper end of the ore bin body; then, a heat exchange pipe with a diameter of Φ25mm is first laid out along the outer wall of the ore bin body in a spiral arrangement on the heat exchange pipe fixing frame 3, and the heat exchange pipe is tied to the heat exchange pipe fixing frame 3. The vertical section of the heat exchange pipe continues to be laid in the opposite direction to the bottom of the ore bin body at the upper end; finally, the outer protective layer is constructed, and the water inlet end 41 of the heat exchange pipe is connected to the heating network water supply pipe 7 through valve A1; the water outlet end 44 is connected to the heating network return water pipe 8 through valve B1. A venting / draining valve A2 and a venting / draining valve B2 are respectively provided at the water inlet end 41 and the water outlet end 44 of the heat exchange pipe.

[0024] When the ambient temperature is below 0℃, open valves A1 and B1, and discharge the air in the heat exchange tube through the vent / drain valve B2. Then close the vent / drain valve B2 and open valves A1 and B1 to achieve hot water circulation, allowing the heat exchange tube to enter the heat dissipation working state, heating the ore bin wall, and transferring heat to the material inside the bin through the bin wall, effectively preventing the material inside the bin from freezing.

[0025] It should be noted that if the heating system in the mining area is shut down for an extended period, valves A1 and B1 must be closed, and vent / drain valves A2 and B2 must be opened to drain the water from the heat exchange pipes to prevent the pipes from freezing and becoming blocked. When the heating system is restored to normal operation, the above method can be repeated to allow the heat exchange pipes to resume their heat dissipation function.

Claims

1. A mine storage structure with antifreeze and heating functions, comprising a mine storage body, the mine storage body including a cylindrical part, a conical part disposed in the lower part of the cylindrical part, and a storage roof structure disposed in the upper part of the cylindrical part, characterized in that: It also includes several rows of heat exchange tube fixing brackets, heat exchange tubes, and an outer protective layer. The several rows of heat exchange tube fixing brackets are installed on the outer wall of the ore bin body, starting from the bottom of the cylindrical section of the outer wall of the ore bin body and welded along a spiral trajectory with horizontal arc length and vertical distance along the circumference of the ore bin body until the upper end of the cylindrical section. One end of each heat exchange tube is fixed as a water inlet to the lower end of the cylindrical section of the ore bin body, with the water inlet extending out of the ore bin body. The entire heat exchange tube is evenly and obliquely distributed along the fixing brackets on the outer wall of the ore bin body, extending to the upper part of the ore bin body. At the end, a spiral structure segment is formed, and then a vertical segment is formed vertically downwards in the opposite direction. The end of the vertical segment is the water outlet, which extends to the connection between the cylindrical part and the conical part. Its water outlet extends out of the body of the ore bin. The outer protective layer is set on the outside of the heat exchange tube fixing frame and the heat exchange tube. The water inlet of the heat exchange tube is connected to the heating network water supply pipe through valve A1. The water outlet is connected to the heating network return water pipe through valve B1. Air release / water release valve A2 and air release / water release valve B2 are respectively provided at the water inlet and water outlet of the heat exchange tube.

2. The mine storage structure with antifreeze and heating functions according to claim 1, characterized in that: The pitch of the spiral arrangement structure segment is 200mm~400mm.

3. The mine storage structure with antifreeze and heating functions according to claim 1, characterized in that: The aforementioned rows of fixing frames are welded from the bottom structure of the outer wall of the ore bin body, along the circumference of the ore bin body in a spiral trajectory with a horizontal arc length L=1.0m~1.5m and a vertical distance h=200mm~400mm, until the upper end of the ore bin body.

4. The mine storage structure with antifreeze and heating functions according to claim 1, characterized in that: The main body of the mine silo is either a steel mine silo or a concrete mine silo.

5. The mine storage structure with antifreeze and heating functions according to claim 4, characterized in that: The outer protective layer is made of rock wool material with good fire resistance, high temperature resistance and durability. The vertical section of the heat exchange pipe is wrapped in the outer protective layer of rock wool material. The water inlet and outlet of the heat exchange pipe extend out of the outer protective layer of rock wool material and are set perpendicular to the steel mine silo body or concrete mine silo body.

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