Intensive gold ore processing roasting equipment

Abstract

The invention discloses intensive gold ore processing roasting equipment which comprises a roasting main furnace, a preheating system, a cooling system, a conveying system and a dust removal system. The conveying system is used for conveying materials to be processed into the preheating system; the preheating system is used for preheating materials to be processed and then conveying the materials into the roasting main furnace; the roasting main furnace is used for carrying out gas combustion to generate high-temperature flue gas to roast materials, a plurality of burners are arranged in the roasting main furnace, and the burners can automatically adjust the gas inflow; the cooling system comprises a first-stage cyclone cooler and a second-stage cyclone cooler; and the first-stage cyclone cooler is communicated with the dust removal system. The burner capable of automatically adjusting the gas inlet amount is arranged on the main roasting furnace, so that the loss of the gas can be effectively reduced; and meanwhile, the dust removal system can convey the return ash material into the first-stage cyclone cooler, so that the roasting temperature of the return ash is increased, the ignition loss of the return ash is reduced, and the purpose of reducing the temperature of the main furnace is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of gold ore processing, and in particular to intensive gold ore processing and roasting equipment. Background Art

[0002] With the gradual reduction of easily treatable gold ore resources, difficult-to-treat gold ore has become the main source of gold industrial production. According to the process mineralogical properties of gold ore, difficult-to-treat gold ore can be divided into complex polymetallic sulfide ore, carbonaceous ore, and telluride ore. The difficulty in treating gold ore is mainly manifested in being wrapped by S, As-containing minerals, and quartz minerals; the presence or consumption of leaching reagents, or the adsorption of harmful elements of leached gold complexes, and ultimately resulting in such ores without pretreatment, directly using cyanide leaching The gold leaching rate is less than 80%. The ore object targeted by the present invention contains elements such as S, As, and C, and is a typical difficult-to-treat gold ore. Pretreatment effectively opens the mineral wrapping of gold and weakens the negative effects of harmful elements, which is an effective way to achieve efficient utilization of difficult-to-treat gold ore.

[0003] A common pretreatment method is roasting, but the existing gold mine roasting equipment has high gas consumption and total nitrogen oxide emissions during roasting, which is inconsistent with the development of green, low-carbon and low-nitrogen. Summary of the invention

[0004] The problem to be solved by the present invention is: to provide an intensive gold ore processing and roasting equipment, which can effectively reduce the loss of fuel gas by arranging a burner that can automatically adjust the fuel gas intake amount in the main roasting furnace; at the same time, the dust removal system is connected with the dust removal system through a primary cyclone cooler, and the dust removal system can transport the returned ash material to the primary cyclone cooler, thereby increasing the roasting temperature of the returned ash, reducing the ignition loss of the returned ash, and achieving the purpose of lowering the temperature of the main furnace.

[0005] The technical solution provided by the present invention to solve the above problems is: an intensive gold ore processing and roasting equipment, including a roasting main furnace, a preheating system, a cooling system, a conveying system and a dust removal system;

[0006] The conveying system is used to convey the material to be processed into the preheating system;

[0007] The preheating system is used to preheat the materials to be processed and then transport them to the main roasting furnace;

[0008] The main roasting furnace is used to burn gas to generate high-temperature flue gas for roasting materials. A plurality of burners are arranged in the main roasting furnace, and the burners can automatically adjust the gas intake volume;

[0009] The cooling system includes a primary cyclone cooler and a secondary cyclone cooler, the main roasting furnace, the primary cyclone cooler and the secondary cyclone cooler are connected in sequence, and the primary cyclone cooler is connected to the dust removal system;

[0010] The dust removal system is used to process the dust generated by roasting inside the equipment and transport the returned dust material to the primary cyclone cooler.

[0011] Preferably, the conveying system comprises a screw feeder and a conveyor belt, and the material in the screw feeder is transported via the conveyor belt.

[0012] Preferably, the preheating system comprises a primary cyclone preheater and a secondary cyclone preheater, and the primary cyclone preheater and the secondary cyclone preheater are connected.

[0013] Preferably, the preheating system also includes a cyclone separator and a Venturi dryer, the cyclone separator is connected to the secondary cyclone preheater, the discharge pipe of the cyclone separator is connected to the material inlet of the cooling system, and the Venturi dryer is used to dry the material transmitted by the conveying system and then transmit it to the primary cyclone preheater.

[0014] Preferably, the cooling system further includes a three-stage cyclone cooler and a four-stage cyclone cooler.

[0015] Preferably, the burner comprises a mounting base, an air outlet pipe and an adjusting component, wherein the mounting base is arranged at the lower end of the air outlet pipe, and the adjusting component is arranged in the air outlet pipe for adjusting the air outlet volume of the air outlet pipe.

[0016] Preferably, the outlet pipe is provided with an outlet hole 1, an outlet hole 2 and a transition hole, the diameter of the outlet hole 1 is larger than the diameter of the outlet hole 2, and the transition hole is used to connect the outlet hole 1 and the outlet hole 2.

[0017] Preferably, the transition hole is a tapered hole.

[0018] Preferably, the adjustment component includes an adjustment ring and a plurality of driving mechanisms, a plurality of air outlet holes three are arranged in an annular array in the air outlet pipe, an air vent hole one is arranged on the adjustment ring one, the number of which is the same as the number of the air outlet holes three, the driving mechanism includes a thermostatic telescopic rod, a spring one and a limit block one, an annular groove one for accommodating the adjustment ring one and an installation groove one for installing the thermostatic telescopic rod are arranged in the air outlet pipe, the adjustment ring one can rotate in the annular groove one, the length of the thermostatic telescopic rod can be adjusted according to the temperature in the main roasting furnace, the limit block one is located in the installation groove one and is connected to the adjustment ring one, one end of the spring one is fixedly connected to the adjustment ring one, and the other end is fixedly connected to the thermostatic telescopic rod.

[0019] Preferably, the adjustment component also includes an adjustment ring 2 and a plurality of transmission mechanisms, a plurality of air outlet holes 4 are arranged in a circular array in the air outlet pipe, and two air vent holes which are the same in number as the four air outlet holes are arranged on the adjustment ring 2, and the transmission mechanism includes a transmission rod, a limit block 2 and a spring 2, and an annular groove 2 for accommodating the adjustment ring 2 and a mounting groove 2 for accommodating the limit block 2 are arranged in the air outlet pipe, one end of the transmission rod is connected to the thermosensitive expansion rod, and the other end extends into the mounting groove 2, the limit block 2 is connected to the adjustment ring 2, and a mounting hole for mounting the spring 2 is arranged on the groove wall of the mounting groove 2, and the end of the spring 2 away from the mounting hole is fixedly connected to the limit block 2.

[0020] Compared with the prior art, the advantages of the present invention are: the present invention can effectively reduce the loss of fuel gas by arranging a burner that can automatically adjust the fuel gas intake amount in the main roasting furnace; at the same time, the dust removal system is connected with the dust removal system through the first-level cyclone cooler, and the dust removal system can transport the returned ash material to the first-level cyclone cooler, thereby increasing the roasting temperature of the returned ash, reducing the ignition loss of the returned ash, and achieving the purpose of lowering the temperature of the main furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the burner of the present invention;

[0024] Figure 3 is a side sectional view of a burner of the present invention;

[0025] Figure 4 is a main cross-sectional view of the burner of the present invention;

[0026] Figure 5 yes Figure 4 A magnified schematic diagram of center A.

[0027] The attached drawings are marked with: 1. dust removal system, 2. primary cyclone cooler, 3. secondary cyclone cooler, 4. third-stage cyclone cooler, 5. fourth-stage cyclone cooler, 6. burner, 7. main roasting furnace, 8. primary cyclone preheater, 9. cyclone separator, 10. screw feeder, 11. venturi dryer, 12. secondary cyclone preheater, 13. air outlet pipe, 14. mounting base, 15. air outlet hole 2, 16. air outlet hole 3, 17. air outlet hole 4, 18. air outlet hole 1, 19. transition hole, 20. adjusting ring 1, 21. adjusting ring 2, 22. vent hole 1, 23. limit block 2, 24. vent hole 2, 25. mounting slot 1, 26. limit block 1, 27. spring 1, 28. transmission rod, 29. thermo-expansion rod, 30. mounting hole, 31. spring 2, 32. mounting slot 2. DETAILED DESCRIPTION

[0028] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0033] It should also be understood that the terms used in this description of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms.

[0034] like Figure 1 As shown, an intensive gold ore processing and roasting equipment includes a roasting main furnace 7, a preheating system, a cooling system, a conveying system and a dust removal system 1;

[0035] The conveying system is used to convey the material to be processed into the preheating system;

[0036] The preheating system is used to preheat the material to be processed and then transport it to the main roasting furnace 7;

[0037] The main roasting furnace 7 is used to burn gas to generate high-temperature flue gas to roast materials. A plurality of burners are arranged in the main roasting furnace 7, and the burners can automatically adjust the gas intake.

[0038] The cooling system includes a primary cyclone cooler 2 and a secondary cyclone cooler 3, the main roasting furnace 7, the primary cyclone cooler 2 and the secondary cyclone cooler 3 are connected in sequence, and the primary cyclone cooler 2 is connected to the dust removal system 1;

[0039] The dust removal system 1 is used to process the dust generated by roasting inside the equipment and transport the returned dust material to the primary cyclone cooler 2.

[0040] In the above scheme, by arranging a burner that can automatically adjust the gas intake amount in the main roasting furnace, the gas loss can be effectively reduced; at the same time, compared with the prior art in which the ash return material of the dust treatment system is connected to the secondary cyclone cooler, this scheme is connected to the dust removal system through the primary cyclone cooler, and the dust removal system can transport the ash return material to the primary cyclone cooler, thereby increasing the roasting temperature of the ash return, reducing the ignition loss of the ash return, and achieving the purpose of lowering the temperature of the main furnace.

[0041] Specifically, the conveying system includes a screw feeder 10 and a conveyor belt, and the material in the screw feeder 10 is transported via the conveyor belt.

[0042] The preheating system includes a primary cyclone preheater 8 and a secondary cyclone preheater 12, and the primary cyclone preheater 8 is connected to the secondary cyclone preheater 12. Further, the preheating system also includes a cyclone separator 9 and a venturi dryer 11, the cyclone separator 9 is connected to the secondary cyclone preheater 12, the discharge pipe of the cyclone separator 9 is connected to the material inlet of the cooling system, and the venturi dryer 11 is used to dry the material transmitted by the conveying system and then transmit it to the primary cyclone preheater 8.

[0043] Furthermore, the cooling system also includes a three-stage cyclone cooler 4 and a four-stage cyclone cooler 5 .

[0044] The wet gold ore powder is fed into the Venturi dryer by a screw feeder through a conveyor belt and then transferred to the primary cyclone preheater 8, and the material is sent to the primary cyclone preheater. The material at 150°C separated by the primary cyclone preheater enters the secondary cyclone preheater for preheating, and then the material enters the main roasting furnace for roasting through the cyclone separator.

[0045] The roasted gold ore powder enters the cooling system step by step, and is collected after being cooled by cyclone coolers at various levels.

[0046] As another embodiment of the present invention, the burner includes a mounting base 14, an air outlet pipe 13 and an adjustment component, wherein the mounting base 14 is arranged at the lower end of the air outlet pipe 13, and the adjustment component is arranged in the air outlet pipe 13 for adjusting the air outlet amount of the air outlet pipe 13. Further, the air outlet pipe 13 is provided with an air outlet hole 18, an air outlet hole 2 15 and a transition hole 19, wherein the diameter of the air outlet hole 18 is greater than the diameter of the air outlet hole 2 15, and the transition hole 19 is used to connect the air outlet hole 18 and the air outlet hole 2 15. Furthermore, the transition hole 19 is a tapered hole.

[0047] In this embodiment, specifically, the adjustment component includes an adjustment ring 20 and a plurality of driving mechanisms. A plurality of air outlet holes 3 16 are arranged in an annular array in the air outlet pipe 13. The adjustment ring 20 is provided with air vents 22 having the same number as the air outlet holes 3 16. The driving mechanism includes a thermostatic rod 29, a spring 27 and a limit block 26. An annular groove 1 for accommodating the adjustment ring 20 and a mounting groove 25 for mounting the thermostatic rod 29 are arranged in the air outlet pipe 13. The adjustment ring 20 can rotate in the annular groove 1. The length of the thermostatic rod 29 can be adjusted according to the temperature in the roasting main furnace 7. The limit block 26 is located in the mounting groove 25 and is connected to the adjustment ring 20. One end of the spring 27 is fixedly connected to the adjustment ring 20, and the other end is fixedly connected to the thermostatic rod 29.

[0048] Furthermore, the adjustment component also includes an adjustment ring 21 and a number of transmission mechanisms. The air outlet pipe 13 is provided with a number of air outlet holes 4 17 in a circular array. The adjustment ring 21 is provided with air vent holes 24 that are the same in number as the air outlet holes 4 17. The transmission mechanism includes a transmission rod 28, a limit block 23 and a spring 231. The air outlet pipe 13 is provided with an annular groove 2 for accommodating the adjustment ring 21 and a mounting groove 2 32 for accommodating the limit block 23. One end of the transmission rod 28 is connected to the thermostatically induced expansion rod 29, and the other end extends into the mounting groove 2 32. The limit block 23 is connected to the adjustment ring 21. The groove wall of the mounting groove 2 32 is provided with a mounting hole 30 for mounting the spring 2 31. The end of the spring 2 31 away from the mounting hole 30 is fixedly connected to the limit block 23.

[0049] In the above scheme, in order to ensure that the gas ejected from the gas outlet pipe has a high flow rate and enables the gas to be ejected into the combustion area of ​​the main roasting furnace, in this scheme, the gas outlet hole 1, the transition hole and the gas outlet hole 2 are used to form a constricted structure to increase the flow rate of the gas; when it is necessary to increase the temperature in the main roasting furnace, the outside world increases the amount of gas entering the main roasting furnace, and due to the constricted structure of the gas channel in the gas outlet pipe, the amount of gas entering the main roasting furnace is limited. Therefore, in this scheme, when the outside world increases the amount of gas entering the main roasting furnace, the gas outlet hole 1, the transition hole and the gas outlet hole 2 are used to form a constricted structure to increase the flow rate of the gas; when it is necessary to increase the temperature in the main roasting furnace, the outside world increases the amount of gas entering the main roasting furnace, and due to the constricted structure of the gas channel in the gas outlet pipe, the amount of gas entering the main roasting furnace is limited. After the air intake of the main furnace is increased, the temperature in the roasting main furnace is first increased. After the thermosensitive telescopic rod in the burner nozzle senses the temperature rise in the roasting main furnace, the thermosensitive telescopic rod undergoes axial deformation, and drives the limit block 1 to move in the installation groove 1 through the spring 1, thereby driving the adjusting ring 1 to rotate until one end of the limit block 1 contacts the groove wall of the installation groove 1. At this time, the vent hole 1 on the adjusting ring 1 just corresponds to the position of the air outlet hole 3, and the air outlet hole 3 is no longer blocked (under normal conditions, the vent hole 1 and the air outlet hole 3 are misaligned, and the adjusting ring 1 will be out of When the air hole 3 is blocked, the gas can enter the main roasting furnace from the air outlet 1 through the air outlet 3, thereby effectively increasing the jet volume of the burner; when the main roasting furnace requires a higher temperature, the air intake into the burner is further increased, the gas volume entering the main roasting furnace is also further increased, the temperature of the main roasting furnace is further increased, the thermosensitive telescopic rod is further axially deformed, and the limit block 1 is in contact with the groove wall of the installation groove 1, so the limit block 1 can no longer move, the thermosensitive telescopic rod compresses the spring 1, and the thermosensitive telescopic rod is also compressed. The rod drives the transmission rod to move and contact the limit block 2 on the adjusting ring 2 and drive the limit block 2 to move, thereby driving the adjusting ring 2 to rotate until one end of the limit block 2 contacts the groove wall of the mounting groove 2. At this time, the air vent 2 on the adjusting ring 2 just corresponds to the position of the air outlet hole 4, and the air outlet hole 4 is no longer blocked (under normal conditions, the air vent 2 and the air outlet hole 4 are misaligned, and the adjusting ring 2 blocks the air outlet hole 4), and the gas can enter the roasting main furnace from the air outlet hole 1 through the air outlet hole 4, thereby further increasing the jet volume of the nozzle.

[0050] It should be noted that the thermostrictive rod in the above solution is made of titanium alloy memory material, and the axial deformation length of the thermostrictive rod is different under different temperature conditions.

[0051] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. An intensive gold ore processing and roasting equipment, characterized in that: It comprises a main roasting furnace (7), a preheating system, a cooling system, a conveying system and a dust removal system (1); The conveying system is used to convey the material to be processed into the preheating system; The preheating system is used to preheat the material to be processed and then transport it to the main roasting furnace (7); The main roasting furnace (7) is used to burn gas to generate high-temperature flue gas for roasting materials. A plurality of burners are arranged in the main roasting furnace (7), and the burners can automatically adjust the gas intake amount. The cooling system comprises a primary cyclone cooler (2) and a secondary cyclone cooler (3); the main roasting furnace (7), the primary cyclone cooler (2) and the secondary cyclone cooler (3) are connected in sequence; and the primary cyclone cooler (2) is connected to the dust removal system (1); The dust removal system (1) is used to process dust generated by calcination inside the equipment and to transport the returned dust to the primary cyclone cooler (2).

2. The intensive gold ore processing and roasting equipment according to claim 1 is characterized in that: The conveying system comprises a screw feeder (10) and a conveyor belt, and the material in the screw feeder (10) is transported via the conveyor belt.

3. The intensive gold ore processing and roasting equipment according to claim 1 is characterized in that: The preheating system comprises a primary cyclone preheater (8) and a secondary cyclone preheater (12), and the primary cyclone preheater (8) and the secondary cyclone preheater (12) are connected.

4. The intensive gold ore processing and roasting equipment according to claim 3 is characterized in that: The preheating system further comprises a cyclone separator (9) and a venturi dryer (11), wherein the cyclone separator (9) is connected to the secondary cyclone preheater (12), the discharge pipe of the cyclone separator (9) is connected to the material inlet of the cooling system, and the venturi dryer (11) is used to dry the material transmitted by the conveying system and then transmit it to the primary cyclone preheater (8).

5. The intensive gold ore processing and roasting equipment according to claim 3 is characterized in that: The cooling system also includes a three-stage cyclone cooler (4) and a four-stage cyclone cooler (5).

6. The intensive gold ore processing and roasting equipment according to claim 1 is characterized in that: The burner comprises a mounting base (14), an air outlet pipe (13) and an adjustment component, wherein the mounting base (14) is arranged at the lower end of the air outlet pipe (13), and the adjustment component is arranged in the air outlet pipe (13) for adjusting the air outlet volume of the air outlet pipe (13).

7. The intensive gold ore processing and roasting equipment according to claim 6 is characterized in that: The outlet pipe (13) is provided with an outlet hole 1 (18), an outlet hole 2 (15) and a transition hole (19); the diameter of the outlet hole 1 (18) is larger than the diameter of the outlet hole 2 (15); and the transition hole (19) is used to connect the outlet hole 1 (18) and the outlet hole 2 (15).

8. The intensive gold ore processing and roasting equipment according to claim 7 is characterized in that: The transition hole (19) is a tapered hole.

9. The intensive gold ore processing and roasting equipment according to claim 8, characterized in that: The adjustment assembly comprises an adjustment ring (20) and a plurality of driving mechanisms. A plurality of air outlet holes (16) are arranged in an annular array in the air outlet pipe (13). The adjustment ring (20) is provided with air vent holes (22) the same number as the air outlet holes (16). The driving mechanism comprises a thermosensitive telescopic rod (29), a spring (27) and a stopper (26). The air outlet pipe (13) is provided with an annular groove (20) for accommodating the adjustment ring (20) and a mounting groove (25) for mounting the thermosensitive telescopic rod (29). The adjustment ring (20) can rotate in the annular groove. The length of the thermosensitive telescopic rod (29) can be adjusted according to the temperature in the main roasting furnace (7). The stopper (26) is located in the mounting groove (25) and is connected to the adjustment ring (20). One end of the spring (27) is fixedly connected to the adjustment ring (20) and the other end is fixedly connected to the thermosensitive telescopic rod (29).

10. The intensive gold ore processing and roasting equipment according to claim 8, characterized in that: The adjustment assembly further comprises an adjustment ring 2 (21) and a plurality of transmission mechanisms. A plurality of air outlet holes 4 (17) are arranged in an annular array in the air outlet pipe (13). The adjustment ring 2 (21) is provided with air vent holes 2 (24) whose number is the same as the number of the air outlet holes 4 (17). The transmission mechanism comprises a transmission rod (28), a limit block 2 (23) and a spring 2 (31). The air outlet pipe (13) is provided with an annular groove 2 for accommodating the adjustment ring 2 (21) and a spring 2 (31). The second installation groove (32) is arranged to accommodate the second limit block (23). One end of the transmission rod (28) is connected to the thermo-elastic rod (29), and the other end extends into the second installation groove (32). The second limit block (23) is connected to the second adjustment ring (21). A mounting hole (30) for mounting the second spring (31) is arranged on the groove wall of the second installation groove (32). One end of the second spring (31) away from the mounting hole (30) is fixedly connected to the second limit block (23).

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