Cooked gold powder boiling, washing and impurity removing device

Abstract

The utility model relates to the field of wet metallurgy impurity removal equipment, in particular to a coarse gold powder boiling and washing impurity removal device. The coarse gold powder boiling, washing and impurity-removing device comprises a gold washing kettle body, a gold washing kettle body, a washing kettle body and an impurity-removing kettle body, wherein the gold washing kettle body is used for containing coarse gold powder; the heating structure covers the outer side of the gold washing kettle body and is used for heating the gold washing kettle body; the heat preservation structure covers the outer side of the heating structure and is used for preserving heat of the heating structure; the transmission structure is arranged on the fixed bracket and is used for fixing the gold washing kettle body on the fixed bracket and driving the gold washing kettle body to rotate to an inverted position; and the vacuum collecting device is arranged below the gold washing kettle body and used for collecting coarse gold powder and waste liquid which are poured out in the process that the gold washing kettle body rotates to the inverted position and subjected to boiling, washing and impurity removal.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydrometallurgy impurity removal equipment, especially to a crude gold powder cooking and washing impurity removal device. BACKGROUND

[0002] When rare and precious metals gold and silver are impurity removed, due to the different element contents in raw materials and technical processes, the crude gold powder removed by impurity removal needs to be further pickled and impurity removed, so as to obtain electrolytic gold (Au-IC 99.99) with higher qualified rate.

[0003] The cooking and washing impurity removal operation of the crude gold powder is usually carried out in a gold washing kettle, and in the related technology, the material of the gold washing kettle is mostly glass or steel lined with ceramic, which is easy to break and has a short service life. Meanwhile, when the crude gold powder is cooked and washed for impurity removal, the temperature of the gold washing kettle cannot be accurately controlled, and since the heat dissipation speed of the kettle body is fast, higher heating cost is consumed. SUMMARY

[0004] The utility model aims at at least in a certain extent solves one of the technical problems in the related art. For this purpose, the utility model provides a crude gold powder cooking and washing impurity removal device, which uses steel lined titanium composite material as the kettle body of the gold washing kettle, and sets heating and heat preservation structures outside the kettle body of the gold washing kettle, thereby effectively improving the service life of the gold washing kettle and the efficiency of the impurity removal operation of the crude gold powder.

[0005] To achieve the above purpose, the utility model embodiment provides a crude gold powder cooking and washing impurity removal device, which comprises: a gold washing kettle body for containing crude gold powder; a heating structure covering the outside of the gold washing kettle body for heating the gold washing kettle body; a heat preservation structure covering the outside of the heating structure for heat preservation of the heating structure; a transmission structure arranged on a fixed support for fixing the gold washing kettle body on the fixed support and rotating the gold washing kettle body to an inverted position; and a vacuum collection device arranged below the gold washing kettle body for collecting the crude gold powder and waste liquid after cooking and washing impurity removal during the rotation of the gold washing kettle body to the inverted position.

[0006] In addition, the crude gold powder cooking and washing impurity removal device according to the above embodiment of the utility model can also have the following additional technical features:

[0007] According to some embodiments of the utility model, the material of the gold washing kettle body is steel lined titanium composite material or pure titanium.

[0008] According to some embodiments of the utility model, the heating structure comprises a heating layer for containing heat conducting oil to heat the gold washing kettle body through the heat conducting oil.

[0009] According to some embodiments of the utility model, the heating structure further comprises a heating rod and a heating temperature measuring tube; the heating rod is used for heating the heat-conducting oil contained in the heating layer; and the heating temperature measuring tube is used for measuring the temperature of the heat-conducting oil contained in the heating layer.

[0010] According to some embodiments of the utility model, the heating structure and the heat preservation structure are fixed through a jacket.

[0011] According to some embodiments of the utility model, the transmission structure comprises a transmission shaft and a transmission motor; the transmission shaft is connected with the transmission motor; the two ends of the transmission shaft are arranged on the fixed support; the transmission shaft is used for fixing the gold washing kettle body on the fixed support; and the transmission motor is used for driving the transmission shaft to rotate, so that the transmission shaft drives the gold washing kettle body to rotate to the inverted position.

[0012] According to some embodiments of the utility model, the crude gold powder cooking and washing impurity removal device further comprises an oil supply structure; the oil supply structure is arranged above the plane where the heating structure is located and comprises an oil storage tank and an oil pipeline; the oil storage tank is provided with an oil outlet valve; and the oil storage tank is communicated with the oil inlet of the heating layer through the oil outlet valve and the oil pipeline, so as to provide the heat-conducting oil for the heating layer.

[0013] According to some embodiments of the utility model, the bottom of the gold washing kettle body is provided with an inner kettle temperature measuring tube; the inner kettle temperature measuring tube extends into the inside of the gold washing kettle body and is used for measuring the temperature of the crude gold powder washing liquid contained in the inside of the gold washing kettle body.

[0014] According to some embodiments of the utility model, the top of the gold washing kettle body is provided with a gas collecting hood, which is used for collecting the waste gas generated in the process of cooking and washing and removing impurities of the crude gold powder.

[0015] According to some embodiments of the utility model, the device further comprises a vacuum filtration device; the vacuum filtration device is communicated with the vacuum collection device and is used for collecting the crude gold powder and waste liquid after cooking and washing and removing impurities and performing filtration on the crude gold powder and waste liquid after cooking and washing and removing impurities; and the crude gold powder is cooked and washed and impurities are removed by using concentrated hydrochloric acid.

[0016] According to the crude gold powder cooking and washing impurity removal device provided by the utility model, the gold washing kettle body is made of steel lining titanium composite material or pure titanium, so that the corrosion resistance of the gold washing kettle body can be effectively improved, the service life of the crude gold powder cooking and washing impurity removal device is prolonged, the heating layer and the heat preservation layer are arranged outside the gold washing kettle body, the temperature in the heating layer and the gold washing kettle body is monitored and controlled in real time, the cooking and washing impurity removal reaction can be performed at a constant temperature, the heating energy and cost are effectively reduced, and the cooking and washing impurity removal efficiency is improved.

[0017] Some of the additional aspects and advantages of the utility model will be given in the following description, some will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only a part of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 The structure schematic diagram of the crude gold powder cooking and washing impurity removal device provided by the present application embodiment is shown in the figure.

[0020] Figure 2 The washing gold cauldron body and vacuum collection device placement position schematic diagram of the crude gold powder cooking and washing impurity removal device provided by the present application embodiment is shown in the figure.

[0021] Figure 3 The operation flow chart of the crude gold powder cooking and washing impurity removal device provided by the present application embodiment is shown in the figure.

[0022] The figure mark: 1-washing gold cauldron body; 11-cauldron internal temperature measuring pipe; 2-heating structure; 21-heating layer; 22-heating temperature measuring pipe; 23-heating rod; 24-oil outlet; 25-oil inlet; 3-heat preservation structure; 4-transmission structure; 41-transmission motor; 42-transmission shaft; 5-vacuum collection device; 6-jacket; 7-fixed support; 8-oil supply structure; 81-oil storage tank; 82-oil outlet valve; 83-oil pipeline; 9-gas collection hood; 10-vacuum filtration device. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further explain the present application in combination with specific embodiments and referring to the drawings.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connection" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] As described in the background section, precious metals such as gold, silver, etc. are mainly obtained by removing impurities from copper anode slime, and the crude gold powder obtained by removing impurities contains a large amount of other element impurities such as silver, lead, bismuth, etc., and needs to be further pickled to remove impurities, so as to obtain high-purity electrolytic gold. In the related art, the pickling and removal of impurities of the crude gold powder needs to be carried out in a gold washing kettle, and the material of the gold washing kettle is usually glass or steel lined with ceramic. Such material is usually fragile and has a short service life. At the same time, concentrated nitric acid is used as the pickling solution, which has a high cost, and under heating conditions, the acid solution will emit a large amount of acid gas, which will pollute the operating environment.

[0026] The applicant found in the process of implementing the present application that, since the pickling and removal of impurities of the crude gold powder needs to be carried out in a heating environment, the temperature needs to be strictly controlled, and the traditional heating method has poor precision control ability for the temperature, and since the gold washing kettle body has a fast heat dissipation speed, it will increase the energy consumption of heating, thereby increasing the cost of pickling and removal of impurities, and there may be safety hazards. Therefore, it is necessary to design a crude gold powder pickling and removal device with a longer service life and lower pickling and removal cost.

[0027] The technical scheme of the present application will be further described in detail through specific embodiments.

[0028] Reference Figure 1 The crude gold powder pickling and removal device structure schematic diagram provided for the embodiments of the present application.

[0029] The crude gold powder pickling and removal device comprises a gold washing kettle body 1, a heating structure 2, a heat preservation structure 3, a transmission structure 4 and a vacuum collection device 5. The gold washing kettle body 1 is used to contain crude gold powder. The heating structure 2 covers the outside of the gold washing kettle body 1 and is used to heat the gold washing kettle body 1. The heat preservation structure 3 covers the outside of the heating structure 2 and is used to preserve heat for the heating structure 2. The transmission structure 4 is arranged on a fixed support 7 and is used to fix the gold washing kettle body 1 on the fixed support 7 and drive the gold washing kettle body 1 to rotate to an inverted position. The vacuum collection device 5 is arranged below the gold washing kettle body 1 and is used to collect the crude gold powder and waste liquid after pickling and removal of impurities during the process of rotating the gold washing kettle body 1 to the inverted position.

[0030] The gold washing kettle body 1 is a reaction container for pickling and removal of impurities of crude gold powder and can contain crude gold powder to be treated and an acid solution. The gold washing kettle body 1 can usually be cylindrical and slightly arc-shaped at the bottom, so that the treated crude gold powder can be fully deposited at the bottom, facilitating subsequent processing and collection.

[0031] As an optional embodiment, the material of the gold washing kettle body 1 is steel lined with titanium composite material or pure titanium.

[0032] Specifically, since the impurity removal by boiling and washing of the coarse gold powder requires long-term heating of the washing kettle body 1, and the washing kettle body 1 needs to contain an acidic solution, the washing kettle body 1 needs to be made of a material with good thermal conductivity and stable chemical properties.

[0033] The utility model provides a washing kettle body 1 made of steel lining titanium composite material or pure titanium, wherein the steel lining titanium composite material is a material composed of a steel base material and a titanium base material through a specific process, the steel base material provides strength and hardness for the steel lining titanium composite material, so that the washing kettle body 1 has high strength and hardness and is not easy to be damaged, the titanium base material is covered on the surface of the steel base material, which not only provides strength for the steel lining titanium composite material, but also provides excellent corrosion resistance and high temperature resistance, is suitable for use in high temperature and high acid environment, can significantly improve the corrosion resistance of the washing kettle body 1, and further prolongs the service life of the washing kettle body 1. The washing kettle body 1 made of pure titanium has good corrosion resistance and high temperature resistance, which not only effectively prolongs the service life of the washing kettle body 1, but also can be conveniently processed into the shape required by the washing kettle body 1 due to the good processing performance of pure titanium, so that the boiling and washing impurity removal reaction can be more efficient.

[0034] The heating structure 2 is covered on the outside of the washing kettle body 1 and is in a semi-wrapping shape with the washing kettle body 1, which can effectively reduce heat loss and make the energy of the heating structure 2 be efficiently and uniformly transmitted to the washing kettle body 1, thereby effectively improving the heating efficiency and avoiding the occurrence of the situation that the boiling and washing impurity removal reaction is insufficient due to local overheating.

[0035] As an optional embodiment, the heating structure 2 comprises a heating layer 21, and the heating layer 21 is used to contain heat-conducting oil to heat the washing kettle body 1 through the heat-conducting oil.

[0036] Specifically, the heating structure 2 covers the heating layer 21, the heating rod 23 and the heating temperature measuring tube 22. The heating layer 21 is in a wrapping shape with the washing kettle body 1, and heat-conducting oil is added in the heating layer 21 as a heating medium. The heat-conducting oil has high heat conduction efficiency and can ensure that heat can be quickly and uniformly transmitted to the washing kettle body 1, so that the materials in the washing kettle body 1 are uniformly heated, thereby prolonging the service life of the washing kettle body 1 to a certain extent. In addition, the cost of the heat-conducting oil is low, which can ensure the heating efficiency of the washing kettle body 1 without increasing too much cost.

[0037] As an optional embodiment, the lower end of the heating layer 21 further comprises an oil outlet 24. Since the heat-conducting oil has the characteristic of being able to be replaced at any time, under the influence of long-term use and high temperature environment, the heat conductivity of the heat-conducting oil may decrease accordingly. Through the oil outlet 24 at the lower end of the heating layer 21, the heat-conducting oil in the heating layer 21 can be efficiently and conveniently replaced. By regularly replacing the heat-conducting oil, the efficiency of heating can be ensured.

[0038] As an optional embodiment, the heating structure 2 further comprises a heating rod 23 and a heating temperature measuring tube 22; the heating rod 23 is used for heating the heat-conducting oil contained in the heating layer 21; and the heating temperature measuring tube 22 is used for measuring the temperature of the heat-conducting oil contained in the heating layer 21.

[0039] Specifically, the heating rod 23 and the heating temperature measuring tube 22 are arranged below the heating layer 21, and the heating rod 23 and the tube body of the heating temperature measuring tube 22 extend into the heating layer 21. The heating rod 23 can heat the heat-conducting oil in the heating layer 21. The heating rod 23 and the heating temperature measuring tube 22 are both connected with a temperature control system. The heating temperature measuring tube 22 monitors the temperature of the heat-conducting oil in the heating layer 21 in real time through the temperature control system. Further, the temperature control system controls the heating power of the heating rod 23 according to the temperature, so as to ensure that the temperature in the washing kettle body 1 remains constant, thereby effectively ensuring the working efficiency of the crude gold powder washing and impurity removing device.

[0040] As an optional embodiment, the crude gold powder washing and impurity removing device further comprises an oil supply structure 8; the oil supply structure 8 is arranged above the plane where the heating structure 2 is located, and comprises an oil storage tank 81 and an oil supply pipeline 83; the oil storage tank 81 is provided with an oil outlet valve 82; and the oil storage tank 81 is communicated with the oil inlet 25 of the heating layer 21 through the oil outlet valve 82 and the oil supply pipeline 83, so as to provide the heat-conducting oil for the heating layer 21.

[0041] Specifically, the oil supply structure 8 comprises the oil storage tank 81 and the oil supply pipeline 83. The oil storage tank 81 is arranged above one side of the fixed support 7. The bottom end of the oil storage tank 81 is provided with the oil outlet valve 82. The oil storage tank 81 is communicated with the oil inlet 25 of the heating layer 21 through the oil outlet valve 82 and the oil supply pipeline 83. In order to ensure that the heat-conducting oil in the oil storage tank 81 can flow into the heating layer 21 smoothly, the oil supply structure 8 needs to be arranged above the heating structure 2. Before starting the washing and impurity removing operation, the heating layer 21 needs to be filled with heat-conducting oil. At this time, the oil outlet valve 82 needs to be opened. The heat-conducting oil in the oil storage tank 81 can flow into the heating layer 21 through the oil supply pipeline 83 and the oil inlet 25. After the heating layer 21 is filled with heat-conducting oil, the heating rod 23 is started to heat the heating layer 21.

[0042] As an optional embodiment, the bottom of the washing kettle body 1 is provided with an internal temperature measuring tube 11. The internal temperature measuring tube 11 extends into the inside of the washing kettle body 1, and is used for measuring the temperature of the crude gold powder washing liquid contained in the inside of the washing kettle body 1.

[0043] Specifically, the inner temperature measuring tube 11 is arranged at the bottom of the kettle body 1, the tube body of the inner temperature measuring tube 11 is inserted into the inside of the kettle body 1 of the gold washing kettle, the inner temperature measuring tube 11 is connected with the temperature control system, and the temperature of the crude gold powder washing solution contained in the kettle body 1 of the gold washing kettle can be monitored. When the heating rod 23 starts to heat the heat-conducting oil in the heating layer 21, the temperature of the crude gold powder washing solution contained in the kettle body 1 of the gold washing kettle also gradually rises. The temperature of the crude gold powder washing solution can be accurately obtained through the connection of the inner temperature measuring tube 11 and the temperature control system, and the power of the heating rod 23 can be further controlled according to the temperature of the crude gold powder washing solution, so that the reaction temperature of the crude gold powder washing solution can be controlled at a constant temperature.

[0044] The heat preservation structure 3 covers the outside of the heating structure 2 and is used for heat preservation of the heating structure 2. The heat preservation structure 3 can be usually made of rock wool, calcium carbonate or the like, has good heat preservation performance and high corrosion resistance, and has low cost.

[0045] As an optional embodiment, the heating structure 2 and the heat preservation structure 3 are fixed by the jacket 6.

[0046] Specifically, the heat preservation layer is fixed with the heating structure 2 through the jacket 6, so as to ensure that the heat preservation structure 3 is closely connected with the heating structure 2, heat loss is difficult to occur, the operation cost of the heating structure 2 is effectively reduced, and the energy utilization rate is improved.

[0047] The transmission structure 4 is arranged on the fixed support 7 and can fix the kettle body 1 of the gold washing kettle on the fixed support 7 and drive the kettle body 1 of the gold washing kettle to rotate to an inverted position, so that the crude gold powder and waste liquid in the kettle body 1 of the gold washing kettle can be poured out.

[0048] As an optional embodiment, the transmission structure 4 includes a transmission shaft 42 and a transmission motor 41; the transmission shaft 42 is connected with the transmission motor 41; both ends of the transmission shaft 42 are arranged on the fixed support 7; the transmission shaft 42 is used for fixing the kettle body 1 of the gold washing kettle on the fixed support 7; and the transmission motor 41 is used for driving the transmission shaft 42 to rotate, so that the transmission shaft 42 drives the kettle body 1 of the gold washing kettle to rotate to the inverted position.

[0049] Specifically, the transmission shaft 42 is arranged at both ends of the fixed support 7, and a conventional shaft is arranged in the gold washing kettle body 1, which can fix the gold washing kettle body 1 on the fixed support 7. One end of the transmission shaft 42 is also connected with the transmission motor 41. When the transmission motor 41 is started, it drives the transmission shaft 42 to rotate, and further, since the transmission shaft 42 is connected with the gold washing kettle body 1, the gold washing kettle body 1 will also rotate, so that the crude gold powder and waste liquid in the gold washing kettle body 1 can be smoothly poured out. By using the transmission structure 4, the discharge operation can be realized by tilting the gold washing kettle body 1 when the impurity removal reaction is finished, which effectively improves the convenience of the discharge process. At the same time, since the gold washing kettle body 1 does not need to be manually operated, the operation process of discharging is more clean and tidy.

[0050] As an optional embodiment, the top of the gold washing kettle body 1 is provided with a gas collecting hood 9 for collecting waste gas generated in the process of cooking and washing the crude gold powder.

[0051] Specifically, waste gas will be generated in the process of cooking and washing the crude gold powder, which may contain harmful chemical substances such as hydrochloric acid vapor or gaseous metal oxides. In order to avoid direct emission into the atmosphere to pollute the environment or threaten the health of the operators, it is necessary to set up a gas collecting hood 9 to collect the waste gas. The diameter of the gas collecting hood 9 can be slightly larger than the diameter of the gold washing kettle body 1, so as to ensure that the waste gas can be fully collected. The gas collecting hood 9 can collect waste gas by negative pressure, and when waste gas is generated in the gold washing kettle, the gas collecting hood 9 can be connected with a waste gas treatment device through a pipeline to form a negative pressure area. Under the action of pressure, the waste gas will be sucked into the gas collecting hood 9 and treated by the waste gas treatment device. The waste gas treatment device can treat the waste gas by active carbon adsorption, wet waste gas treatment, catalytic combustion and the like, which can ensure that the waste gas is effectively purified and meets the emission standard.

[0052] The vacuum collecting device 5 is arranged below the gold washing kettle body 1, and after the cooking and washing of the crude gold powder is finished, the transmission motor 41 can be started to rotate the gold washing kettle body 1, so that the crude gold powder and waste liquid after cooking and washing can be poured into the vacuum collecting device 5.

[0053] It should be noted that the vacuum collecting device 5 can be close to the edge of the gold washing kettle body 1, as shown in Figure 2 so as to ensure that the crude gold powder and waste liquid after cooking and washing can be completely collected, avoiding waste or pollution.

[0054] As an optional embodiment, the crude gold powder washing and impurity removal device further includes a vacuum filtration device 10, which is connected to a vacuum collection device 5 and is used to collect the crude gold powder and waste liquid after washing and impurity removal in the vacuum collection device 5, and to filter the crude gold powder and waste liquid after washing and impurity removal; wherein, concentrated hydrochloric acid is used to wash and remove impurities from the crude gold powder.

[0055] Specifically, the vacuum filtration device 10 is used to separate the crude gold powder and waste liquid collected in the vacuum collection device 5. The vacuum filtration device 10 can typically be composed of a filtration container, a filter membrane assembly, a vacuum pump, and a collection container. The vacuum pump draws the crude gold powder and waste liquid into the filtration container, and the waste liquid flows out through the filter membrane and is collected in the collection container. The crude gold powder is trapped by the filter membrane and remains in the filtration container. By using the vacuum filtration device 10 in conjunction with the vacuum collection device 5, the operation of separating crude gold powder and waste liquid is simplified, and the separation efficiency and purity are effectively improved.

[0056] In the process of boiling and washing crude gold powder to remove impurities, an acidic environment promotes the reaction of impurities such as silver, lead, antimony, and bismuth with the acid, thereby dissolving and removing the impurities. The acidic environment can be provided by concentrated hydrochloric acid or concentrated nitric acid. Compared to concentrated nitric acid, concentrated hydrochloric acid is cheaper, has better thermal stability, and is less corrosive to metals, thus more effectively protecting the washing vessel body 1 from corrosion during the boiling and washing process. Concentrated nitric acid, on the other hand, is more expensive, and its heating process can easily produce side reactions that contaminate the reaction materials. It may also react with metals, damaging the washing vessel body 1. Furthermore, nitric acid can easily produce harmful gases and explosive substances during the reaction, posing a greater operational safety risk. Therefore, in this embodiment of the invention, the acidic environment for boiling and washing crude gold powder is preferably provided by concentrated hydrochloric acid.

[0057] refer to Figure 3 The above is a flowchart illustrating the operation of the coarse gold powder boiling and washing device provided in this embodiment of the present invention.

[0058] As an optional embodiment, the operation of the coarse gold powder boiling and washing impurity removal device provided by this utility model can be as follows:

[0059] Step S1: Inspect the heating structure.

[0060] Specifically, before using the coarse gold powder washing and impurity removal device for washing and impurity removal, first check whether the heating layer in the heating structure is full of heat transfer oil. If the heating layer is lacking heat transfer oil, the oil outlet valve needs to be opened to allow the heat transfer oil in the oil storage tank to flow through the oil pipeline to the oil inlet of the heating layer, and then flow into the heating layer through the oil inlet.

[0061] Step S2: Start the heating structure.

[0062] Specifically, after confirming that the heating layer is filled with heat-conducting oil, the heating rod is activated to heat the heat-conducting oil in the heating layer.

[0063] Step S3: Add the reactants into the gold washing kettle.

[0064] Specifically, the crude gold powder to be purified and concentrated hydrochloric acid are added to the gold washing kettle in a certain proportion so that the crude gold powder reacts with the concentrated hydrochloric acid to start the boiling and washing process to remove impurities. At the same time, the gas collection hood is opened to collect the waste gas.

[0065] Step S4: Monitor the temperature of the heating layer and the inside of the gold washing kettle.

[0066] Specifically, the temperature of the heating layer and the body of the gold washing kettle is detected by heating temperature measuring tubes and internal temperature measuring tubes, and the temperature is transmitted to the temperature control system in real time. The temperature control system further controls the power of the heating rods according to the real-time temperature to keep the temperature inside the gold washing kettle constant.

[0067] Step S5: Collect and separate the crude gold powder and waste liquid.

[0068] Specifically, after the boiling and washing process is completed, the drive motor is started to drive the drive shaft to rotate the gold washing kettle, so that the crude gold powder and waste liquid after boiling and washing are poured into the vacuum collection device. Further, the crude gold powder and waste liquid are filtered through a vacuum filtration device to obtain crude gold powder after boiling and washing. The crude gold powder is then repeatedly washed with hot water until neutral, and then removed for melting and casting to obtain high-purity electrolytic gold after boiling and washing.

[0069] As can be seen from the above, the coarse gold powder boiling and washing device provided by this utility model, by using steel-lined titanium composite material or pure titanium to make the gold washing kettle body, can effectively improve the corrosion resistance of the gold washing kettle body and extend the service life of the coarse gold powder boiling and washing device. At the same time, a heating layer and a heat preservation layer are set outside the gold washing kettle body. By monitoring and controlling the temperature of the heating layer and the gold washing kettle body in real time, the boiling and washing reaction can be carried out at a constant temperature, which effectively reduces the heating energy and cost and improves the boiling and washing efficiency.

[0070] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in the embodiments of this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0071] While the spirit and principles of this invention have been described with reference to several specific embodiments, it should be understood that this invention is not limited to the disclosed specific embodiments, and the division of aspects does not imply that features in these aspects cannot be combined for benefit; such division is merely for ease of description. This invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be interpreted in the broadest sense, thereby encompassing all such modifications and equivalent structures and functions.

Claims

1. A device for boiling and washing away impurities from coarse gold powder, characterized in that, include: Gold washing vessel body (1), the gold washing vessel body (1) is used to hold coarse gold powder; Heating structure (2) covers the outside of the gold washing kettle body (1) and is used to heat the gold washing kettle body (1); A heat insulation structure (3) is provided, which covers the outside of the heating structure (2) and is used to insulate the heating structure (2). Transmission structure (4), the transmission structure (4) is set on the fixed bracket (7) for fixing the gold washing kettle body (1) on the fixed bracket (7) and driving the gold washing kettle body (1) to rotate to the inverted position; Vacuum collection device (5), which is located below the gold washing kettle body (1), is used to collect the crude gold powder and waste liquid poured out after boiling and washing and removing impurities during the process of the gold washing kettle body (1) being rotated to the inverted position.

2. The crude gold powder boiling and washing device according to claim 1, characterized in that, The material of the gold washing kettle body (1) is steel-lined titanium composite material or pure titanium.

3. The crude gold powder boiling and washing device according to claim 2, characterized in that, The heating structure (2) includes a heating layer (21) for holding heat-conducting oil to heat the gold washing vessel body (1) through the heat-conducting oil.

4. The crude gold powder boiling and washing device for removing impurities according to claim 3, characterized in that, The heating structure (2) also includes a heating rod (23) and a heating temperature measuring tube (22); The heating rod (23) is used to heat the heat-conducting oil contained in the heating layer (21); The heating temperature measuring tube (22) is used to measure the temperature of the heat-conducting oil contained in the heating layer (21).

5. The apparatus for boiling and washing away impurities from coarse gold powder according to claim 4, characterized in that, The heating structure (2) and the heat preservation structure (3) are fixed by a jacket (6).

6. The apparatus for boiling and washing away impurities from crude gold powder according to claim 5, characterized in that, The transmission structure (4) includes a transmission shaft (42) and a transmission motor (41); the transmission shaft (42) is connected to the transmission motor (41); both ends of the transmission shaft (42) are mounted on the fixed bracket (7); The drive shaft (42) is used to fix the gold washing kettle body (1) on the fixed bracket (7); The drive motor (41) is used to drive the drive shaft (42) to rotate, so that the drive shaft (42) drives the gold washing kettle body (1) to rotate to the inverted position.

7. The apparatus for boiling and washing away impurities from crude gold powder according to claim 6, characterized in that, It also includes an oil supply structure (8); the oil supply structure (8) is arranged on the plane where the heating structure (2) is located, including an oil storage tank (81) and an oil guide pipe (83); the oil storage tank (81) is provided with an oil outlet valve (82); the oil storage tank (81) is connected to the oil inlet (25) of the heating layer (21) through the oil outlet valve (82) and the oil guide pipe (83) to provide heat transfer oil to the heating layer (21).

8. The apparatus for boiling and washing away impurities from crude gold powder according to claim 7, characterized in that, The bottom of the gold washing kettle body (1) is provided with an internal temperature measuring tube (11), which extends into the interior of the gold washing kettle body (1) to measure the temperature of the crude gold powder washing solution contained inside the gold washing kettle body (1).

9. The apparatus for boiling and washing away impurities from crude gold powder according to claim 8, characterized in that, The top of the gold washing kettle body (1) is equipped with a gas collection hood (9) for collecting waste gas generated during the boiling and washing process of crude gold powder to remove impurities.

10. The apparatus for boiling and washing away impurities from crude gold powder according to claim 9, characterized in that, It also includes a vacuum filtration device (10), which is connected to the vacuum collection device (5) and is used to collect the crude gold powder and waste liquid after boiling and washing to remove impurities in the vacuum collection device (5), and to filter the crude gold powder and waste liquid after boiling and washing to remove impurities; wherein, concentrated hydrochloric acid is used to boil and wash the crude gold powder to remove impurities.

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