CN212128270U - Large-scale copper ingot purification crystallization thermal field - Google Patents
Large-scale copper ingot purification crystallization thermal field Download PDFInfo
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- CN212128270U CN212128270U CN202020387073.1U CN202020387073U CN212128270U CN 212128270 U CN212128270 U CN 212128270U CN 202020387073 U CN202020387073 U CN 202020387073U CN 212128270 U CN212128270 U CN 212128270U
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Abstract
The utility model discloses a large copper ingot purification crystallization thermal field, belonging to the technical field of metal purification technology; the purpose is to establish a controllable thermal field temperature gradient through the opening and closing of a thermal field while improving the sealing performance of the thermal field; the device comprises a heat insulation structure and a heating device arranged in the heat insulation structure, wherein the heat insulation structure comprises a heat insulation cage, a bottom heat insulation layer and a top heat insulation layer; the bottom heat-insulating layer is in contact with the side wall of the heat-insulating cage but not connected with the side wall of the heat-insulating cage; the bottom heat-insulating layer is of a multilayer structure, the area of each layer of bottom is gradually reduced from bottom to top, so that the edges form a step shape, and the bottoms on the two sides of the heat-insulating cage are matched with the bottom heat-insulating layer to form a sealing structure when the heat-insulating cage is buckled with the bottom heat-insulating layer; the utility model overcomes the defect of traditional thermal field when guaranteeing thermal field heating process leakproofness, establishes controllable thermal field temperature gradient through the control of thermal field degree of opening and shutting, realizes the directional at the uniform velocity growth of copper ingot.
Description
Technical Field
The utility model belongs to the technical field of metal purification technology, specifically be a large-scale copper ingot purification crystallization thermal field.
Background
High-purity copper (the purity of copper is 5N-6N, namely 99.999% -99.9999%) contains very few impurities, so that the copper has good electrical conductivity, thermal conductivity, ductility and excellent processability, and is widely applied to sputtering targets, fatigue-resistant cables, electronic industry, flexible cables, ultra-fine enameled wires and other aspects.
The conventional purification techniques for high-purity copper mainly include electrolytic refining, anion exchange and zone-melting refining. The electrolysis method removes impurity elements such As P, Bi, Sb, As, Fe, Ni, Pb, Sn, S, Zn, O and the like by repeatedly electrolyzing high-purity copper, but the electrolysis method has high energy consumption and complex production process, for example, the purification of 5N-6N high-purity copper needs 7-10 days, and the quality is unstable. Anion exchange method, removing impurity ions in copper solution by ion exchange, and evaporating the solution to obtain high-purity CuCl2And reducing the copper to obtain high-purity copper. The process is complex, not beneficial to environmental protection and unstable in quality.
The zone melting refining method is developed since 1955, and the purification principle is as follows: the impurities which can reduce the metal solidifying point move along with the advancing direction of the melting zone, and the impurities which can increase the metal solidifying point move along with the advancing direction of the melting zone, and after multiple times of zone melting, two kinds of impurities in the metal are respectively concentrated at two ends of the metal ingot, and the rest parts are purified. The current zone refining process is still used to produce high purity materials. However, the process has high energy consumption and is difficult to remove impurity elements with large solid-liquid distribution coefficients. In the prior art, a small-size phi 15.7 mm pure copper bar is produced by a process technology of vacuum melting and continuous directional solidification of the copper bar; and adopting a vacuum induction melting hydrogen protection directional solidification device to successfully prepare pure copper rods, tubes and plates by a down-drawing continuous directional solidification technology; however, the method has the defects that the temperature gradient control of the copper ingot purification crystallization is lack of fine control, the equipment and the process are complex, and the production requirement of large-size copper ingots cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the defects of the prior art, provides a large-scale copper ingot purification crystallization thermal field, and establishes a controllable thermal field temperature gradient through the opening and closing of the thermal field while improving the sealing performance of the thermal field, thereby realizing the directional uniform growth of the copper ingot; the problem of high-purity purification of large copper ingots is solved.
The utility model discloses a realize through following technical scheme.
A large-scale copper ingot purification crystallization thermal field comprises a heat insulation structure and a heating device arranged in the heat insulation structure, wherein the heat insulation structure comprises a heat insulation cage, a bottom heat insulation layer arranged at the bottom of the heat insulation cage, and a top heat insulation layer arranged in the heat insulation cage; the bottom heat-insulating layer is in contact with the side wall of the heat-insulating cage but not connected with the side wall of the heat-insulating cage; the bottom heat-insulating layer is of a multi-layer composite structure, the bottom area of each layer is gradually reduced from bottom to top, the edge of the bottom heat-insulating layer forms a step-shaped structure, the bottoms of the two sides of the heat-insulating cage are step-shaped and matched with the bottom heat-insulating layer, and the heat-insulating cage and the bottom heat-insulating layer are buckled to form a sealing structure.
Further, still include the furnace body, thermal-insulated insulation construction sets up in the furnace body.
Furthermore, the furnace body is formed by buckling an upper furnace shell and a lower furnace shell, the upper furnace shell or the lower furnace shell can be separated and opened along a vertical axis under the traction of an external action mechanism, the heat insulation cage is fixedly connected with the upper furnace shell, and the bottom heat insulation layer is fixedly connected with the lower furnace shell through a support member.
Furthermore, the top heat-insulating layer is fixedly arranged in the heat-insulating cage and forms a gap with two side walls of the heat-insulating cage.
Further, the side wall of the heat insulation cage is provided with an inner layer heat insulation structure and an outer layer heat insulation structure, and the joint positions of the adjacent inner layer heat insulation structure and the adjacent outer layer heat insulation structure are staggered.
The utility model discloses produced beneficial effect does for prior art.
The utility model overcomes the defect of traditional thermal field when guaranteeing thermal field heating process leakproofness, establishes controllable thermal field temperature gradient through the control of thermal field degree of opening and shutting, realizes the directional at the uniform velocity growth of copper ingot.
Drawings
FIG. 1 is a schematic structural view of a large copper ingot purifying device according to an embodiment of the present invention when heating is turned off.
FIG. 2 is a schematic view of the local structure of the large copper ingot purifying device according to the embodiment of the present invention.
FIG. 3 is a schematic structural view of the large copper ingot purifying device according to the embodiment of the present invention after the furnace shell is completely lifted.
FIG. 4 is the schematic diagram of the heat insulation cage and the bottom heat insulation layer of the large copper ingot purifying device according to the embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a hollow support column and a cooling system according to an embodiment of the present invention.
In the figure, 1 is a graphite cylinder, 2 is an upper furnace shell, 3 is a top heat-insulating layer, 4 is a heat-insulating cage, 5 is a top heater, 6 is a crucible, 7 is a side heater, 8 is an inner heat-insulating layer, 9 is a lower furnace shell, 10 is a graphite supporting table, 11 is a bottom heat-insulating layer, 12 is a cooling medium inlet pipe, 13 is a bottom support, 14 is a hollow supporting column, 15 is a bottom heater, 16 is a heat-insulating strip, 17 is a cooling medium outlet pipe, 18 is an inner heat-insulating structure, 19 is an outer heat-insulating structure, and 20 is a supporting graphite sheet.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 1, the large copper ingot purification device comprises a furnace body and a cooling system, wherein a thermal field and a supporting system are arranged in the furnace body, the furnace body is formed by buckling an upper furnace shell 2 and a lower furnace shell 9, a hydraulic lifting device (not shown in the figure) is arranged outside the upper furnace shell, and the upper furnace shell 2 and the lower furnace shell 9 can be separated and opened along a vertical axis by the traction of the hydraulic lifting device.
The thermal field comprises a heat insulation structure and a heating device arranged in the heat insulation structure, the heating device comprises a top heater 5, a side heater 7 and a bottom heater 15 which are heat sources, and the heater can be made of graphite, platinum and the like without limitation; the shape of the heater can be selected from sheet, snake, plate and bar; as shown in fig. 4, the heat insulation structure comprises a heat insulation cage 4, a bottom heat insulation layer 11 arranged at the bottom of a bottom base 13, and a top heat insulation layer 3 arranged in the heat insulation cage 4; the heat insulation cage 4 is a heat insulation cage body with an opening at the bottom, the side wall of the heat insulation cage 4 is provided with a double-layer inner heat insulation structure 18 and a double-layer outer heat insulation structure 19, the positions of the joints of the inner heat insulation structure and the outer heat insulation structure are staggered, and meanwhile, a connecting seam formed by the inner heat insulation structure 18 is positioned close to the upper position of the heat insulation cage 4, so that the influence of the connecting seam on a hot-area temperature field is reduced; the inner side of the lower part of the inner heat insulation structure 18 is also provided with a heat insulation strip 16, the heat insulation strip 16 is a movable detachable component, and when the heat insulation cage 4 is lifted, the heat insulation strip plays a role in heat insulation for the side part of the processing material, and is beneficial to establishing a vertical temperature field. The bottom heat-insulating layer 11 is of an upper-lower double-layer structure, two ends of the heat-insulating structure at the lower part are extended out of the heat-insulating structure at the upper part to form a step-shaped edge, and the bottoms of the inner-layer heat-insulating structure and the outer-layer heat-insulating structure of the heat-insulating cage 4 are also step-shaped; the heat insulation cage 4 and the bottom heat insulation layer 11 are buckled to form a sealing structure, and when the heat insulation cage 4 is in a closed state, the heat insulation cage heat insulation layer and the bottom heat insulation layer are combined in a staggered mode, so that a closed space is formed in a hot area; the top heat preservation layer 3 is fixed in the heat insulation cage 4 and located below the top of the heat insulation cage 4, a gap is formed between the top heat preservation layer 3 and two side walls of the heat insulation cage 4, and the top heat preservation layer 3 is fixed when the heat insulation cage 4 is lifted. The whole heat insulation cage 4 is fixedly connected with the upper furnace shell 2 and can be lifted upwards along with the upper furnace shell 2. Go up the top of stove outer covering 2 and still install the carminative graphite section of thick bamboo 1 of heat extraction, graphite section of thick bamboo 1 passes thermal-insulated cage 4's top and top heat preservation 3 entering thermal field in proper order for carry out the emission of heat and gas on thermal field upper portion, graphite section of thick bamboo 1 and thermal-insulated cage 4's junction adopts H type support piece to support.
The supporting system comprises a graphite supporting platform 10, an inner insulating layer 8 wrapped around the graphite supporting platform 10, and a supporting member with one end fixedly connected to the bottom of the graphite supporting platform 10; the graphite support table 10 is a convex structure with notches on two sides, and the upper part of the convex structure is used for feeding; after feeding, filling gaps on two sides of the graphite support table 10 with graphite felts; the inner heat-insulating layer 8 plays a role in preventing the side part of the material to be processed from heat leakage; the supporting member comprises a plurality of groove-shaped stainless steel bottom supports 13 and hollow supporting columns 14 fixedly connected in the bottom supports 13 through bolts, the bottom supports 13 are welded with the inner bottom of the lower furnace shell 9, and the bottom supports 13 play a role in limiting the hollow supporting columns 14; the bottom of the graphite support platform 10 is provided with a pore canal corresponding to the number, shape and position of the hollow support columns 14, and the upper part of the hollow support columns 14 penetrates through the bottom insulating layer 11 and extends into the pore canal to contact with the graphite support platform 10. The hollow support columns 14 are provided with support graphite sheets 20 at the joints with the low thermal insulation layer 11.
As shown in fig. 5, the cooling system includes a cooling medium inlet pipe 12, a cooling medium outlet pipe 17 and a cooling medium pump body (not shown in the figure), wherein an outlet end of the cooling medium inlet pipe 12 sequentially passes through the bottoms of the lower furnace shell 9 and the bottom support 13, extends into the hollow support column 14 to the top of the hollow support column 14, and forms a gap with the inner side of the top of the hollow support column 14; the side surface of the bottom support 13 is provided with a small hole, so that a local negative pressure area or a local positive pressure area is prevented from being formed between the bottom support 13 and the hollow support 14 when the hollow support 14 is installed. The bottom of the bottom support 13 is provided with a plurality of through holes, a cooling medium outlet pipe 17 is communicated with the bottom support 13 and the lower furnace shell 9, a cooling system is externally connected with a liquid nitrogen storage tank, liquid nitrogen enters the graphite support table 10 from a cooling medium inlet pipe 12 to cool the graphite support table 10, and the liquid nitrogen taking heat away flows out of an interlayer of the hollow support column 14 and the cooling medium inlet pipe 12 to the cooling medium outlet pipe 17 at the bottom and is discharged; the crystallized copper ingot to be purified is crystallized and purified indirectly by cooling the graphite support table 10; the bottom heat-insulating layer 11 is fixedly connected with the lower furnace shell 9 through a hollow support column 14, and gaps exist between the bottom heat-insulating layer 11 and the graphite support platform 10 as well as between the bottom heat-insulating layer and the inner heat-insulating layer 8.
The above mentioned structural materials for thermal insulation can be selected from but not limited to graphite carbon felt, graphite hard felt, graphite soft felt, and a combination of graphite hard felt and graphite soft felt. Graphite paper, graphite fiber cloth and the like can be pasted in the heat-insulating layer; the coating such as silicon carbide, tantalum carbide and the like can be plated;
as shown in fig. 2 and fig. 3, after the thermal insulation cage 4 is opened along with the upper furnace shell 2, heat can be radiated from the bottom of the graphite support platform 10, and the hollow support column 14 realizes forced cooling of the graphite support platform 10 through the flow of the cooling medium therein, so as to construct a controllable temperature gradient.
The method for purifying the large copper ingot by adopting the device comprises the following steps:
1) and (3) melting the copper material: putting the copper material into a crucible 6 on a graphite support table 10, and starting a top heater 5, a side heater 7 and a bottom heater 15 to heat and melt the copper material;
2) after the melting is finished, liquid nitrogen is introduced into a cooling medium inlet pipe 12, then the liquid nitrogen is discharged into an interlayer between a hollow support column 14 and the cooling medium inlet pipe 12 through an outlet of the cooling medium inlet pipe 12, and then the liquid nitrogen flows to a cooling medium outlet pipe 17 through a through hole of a bottom support 13, in the process, the cooling medium passes through the inside of a graphite support platform 10 to integrally cool the graphite support platform 10, so that the bottom of a crucible 6 is cooled, then an upper furnace shell 2 is moved to clamp a furnace body according to the requirement of the crystallization temperature of a copper ingot, so that the heat in a heat insulation cage 4 is released from the bottom of the heat insulation cage 4, the temperature in the heat insulation cage 4 is further reduced, and the copper material is gradually crystallized and purified from the bottom to;
3) after the initial nucleation is completed, the flow rate of the cooling medium is reduced until the cooling is finished.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (5)
1. A large-scale copper ingot purification crystallization thermal field is characterized by comprising a heat insulation structure and a heating device arranged in the heat insulation structure, wherein the heat insulation structure comprises a heat insulation cage, a bottom heat insulation layer arranged at the bottom of the heat insulation cage and a top heat insulation layer arranged in the heat insulation cage; the bottom heat-insulating layer is in contact with the side wall of the heat-insulating cage but not connected with the side wall of the heat-insulating cage; the bottom heat-insulating layer is of a multi-layer composite structure, the bottom area of each layer is gradually reduced from bottom to top, the edge of the bottom heat-insulating layer forms a step-shaped structure, the bottoms of the two sides of the heat-insulating cage are step-shaped and matched with the bottom heat-insulating layer, and the heat-insulating cage and the bottom heat-insulating layer are buckled to form a sealing structure.
2. The large copper ingot purification and crystallization thermal field according to claim 1, further comprising a furnace body, wherein the heat insulation structure is arranged in the furnace body.
3. The large-scale copper ingot purification and crystallization thermal field according to claim 2, wherein the furnace body is formed by buckling an upper furnace shell and a lower furnace shell, the upper furnace shell or the lower furnace shell can be separated and opened along a vertical axis under the traction of an external action mechanism, the heat insulation cage is fixedly connected with the upper furnace shell, and the bottom heat insulation layer is fixedly connected with the lower furnace shell through a support member.
4. The large-scale copper ingot purification and crystallization thermal field according to claim 1, wherein the top insulating layer is fixedly arranged in the heat insulation cage and forms a gap with two side walls of the heat insulation cage.
5. The large-scale copper ingot purification and crystallization thermal field according to claim 1, wherein the side wall of the heat insulation cage is provided with an inner and outer multi-layer heat insulation structure, and the joint positions of the adjacent inner and outer heat insulation structures are staggered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020387073.1U CN212128270U (en) | 2020-03-24 | 2020-03-24 | Large-scale copper ingot purification crystallization thermal field |
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| CN202020387073.1U CN212128270U (en) | 2020-03-24 | 2020-03-24 | Large-scale copper ingot purification crystallization thermal field |
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