Equipment configuration method for producing high-end copper alloy cast ingot

Abstract

The invention relates to the field of non-ferrous metal processing equipment, and discloses an equipment configuration method for producing a high-end copper alloy cast ingot, which comprises an intermediate frequency smelting furnace, a variable frequency short coil crucible type inductor holding furnace with an upper furnace body and a semi-continuous casting machine with pulling and stopping functions. The medium-frequency smelting furnace is a coreless crucible furnace with the capacity of 8-20 tons; the heat preservation furnace is a short-coil coreless crucible type electric induction furnace with an upper furnace body, the effective capacity is 8-25 tons, and the heat preservation furnace is provided with a sealed casting box; the semi-continuous casting machine has the pulling and stopping functions which can be adjusted within 2-10 seconds. The method further comprises auxiliary equipment such as a charging vehicle, a dust collection facility and a crown block. The problems of unstable quality, high equipment failure rate and the like in high-end copper alloy ingot casting production are solved, the product yield and the production efficiency are improved, the production cost is reduced, the working environment is improved, and the method has important significance for improving enterprise competitiveness and promoting industry development.

Description

Technical Field

[0001] The present invention relates to the field of nonferrous metal processing equipment, and in particular to an equipment configuration method for producing high-end copper alloy ingots. Background Art

[0002] The equipment used by copper processing enterprises to produce copper ingots mainly consists of copper melting furnaces and casting machines. The most commonly used equipment combinations are melting furnaces, holding furnaces, casting machines, etc. There are two main heating methods for melting furnaces and holding furnaces, one is melting groove inductor heating, and the other is medium-frequency electromagnetic induction coil heating. Ordinary copper ingots can be produced by melting groove inductor heating. However, high-end copper alloy ingots have complex process components, high composition requirements, and serious slag formation during the production process. When using melting groove inductors for heating, the equipment has insufficient stirring capacity, and often blocks the melting groove, causing equipment damage. In actual production, the quality of finished ingots is unstable, the yield is low, the equipment life is severely shortened, and the production capacity is insufficient. These problems lead to high costs for enterprises to produce such high-end copper alloy ingots, the product quality cannot be guaranteed, the scale is difficult to expand, and value benefits cannot be created stably and continuously. Summary of the invention

[0003] The purpose of the present invention is to provide an equipment configuration method for producing high-end copper alloy ingots, which mainly solves the problems of short equipment life caused by slag formation, uneven stirring and other problems in the production process of high-end alloy ingots, unstable ingot quality, low yield and inability to produce high-quality and stable mass production.

[0004] To achieve the above object, the present invention adopts the following technical scheme:

[0005] An equipment configuration method for producing high-end copper alloy ingots, the equipment comprising: a medium frequency melting furnace, a variable frequency short coil crucible induction body holding furnace with an upper furnace body, and a semi-continuous casting machine with pull and stop functions;

[0006] The medium frequency melting furnace is a coreless crucible furnace with a capacity of 8-20 tons. No intermediate launder is used during furnace tilting and casting, and the molten copper is directly transferred to the holding furnace;

[0007] The holding furnace is a short coil coreless crucible induction furnace with an upper furnace body, with an effective capacity of 8-25 tons. The furnace body is provided with a slag removal port and a sealed casting box. The molten copper in the casting box does not contact the air and flows directly into the crystallizer of the casting machine;

[0008] The semi-continuous casting machine has the functions of pulling and stopping casting, and the pulling and stopping time are set to 2-10 seconds, which can be adjusted online during production casting.

[0009] Preferably, when producing 5-10 ton ingots in a single stream:

[0010] The capacity of the medium frequency smelting furnace is 8-12 tons, the power of the medium frequency power supply is 2000-2500KW, and the frequency is 120-200HZ;

[0011] The effective capacity of the holding furnace is 8-12 tons, the power of the variable frequency power supply is 300-400KW, and the frequency is 55-70HZ;

[0012] The semi-continuous casting machine is of mechanical screw type or hydraulic type, equipped with a single support, with a maximum load capacity of 8-16 tons, a maximum casting length of 6500-9000mm, a casting speed range of 0-300mm / min, a casting speed error of ≤±2mm / min, and a casting box equipped with 1 pouring pipe.

[0013] Preferably, when dual streams are used to produce 5-10 ton ingots:

[0014] The capacity of the medium frequency smelting furnace is 16-25 tons, the power of the medium frequency power supply is 3500-4000KW, and the frequency is 90-150HZ;

[0015] The effective capacity of the holding furnace is 16-25 tons, the power of the variable frequency power supply is 350-600KW, and the frequency is 55-70HZ;

[0016] The semi-continuous casting machine is hydraulic, equipped with double supports, with a maximum load capacity of 16-25 tons, a maximum casting length of 6500-9000mm, a casting speed range of 0-300mm / min, a casting speed error of ≤±2mm / min, and a casting box equipped with 2 pouring pipes.

[0017] Preferably, the control system of the casting machine allows online adjustment of the casting speed and the pulling and stopping times to meet the production requirements of different alloy ingots.

[0018] Preferably, the equipment further comprises a vibrating charging car and at least two overhead cranes for loading materials on the smelting furnace and lifting the finished ingots at the end of production.

[0019] Preferably, the equipment also includes dust collection facilities for collecting and treating industrial waste gas generated during the production process.

[0020] Preferably, the holding furnace has a slag removal port for removing slag during the holding process.

[0021] Beneficial effects of the present invention:

[0022] The present invention effectively solves the problem of unstable quality of high-end copper alloy ingots and improves the product yield rate by optimizing the parameter configuration of the medium frequency melting furnace, the variable frequency short coil crucible induction body insulation furnace with an upper furnace body, and the semi-continuous casting machine with pull and stop functions. The use of a coreless crucible medium frequency melting furnace with a capacity of 8-20 tons and a coreless crucible induction electric insulation furnace with an effective capacity of 8-25 tons and an upper furnace body short coil has greatly reduced the equipment failure rate and extended the equipment life. The medium frequency melting furnace does not use an intermediate flow trough to directly transfer materials to the insulation furnace. Combined with the sealed casting box design of the insulation furnace, it reduces the contact between molten copper and air and improves the stability of the alloy composition. The 2-10 second adjustable pull and stop function of the semi-continuous casting machine improves production efficiency and flexibility, and adapts to the production needs of products of different specifications. In addition, the present invention also includes auxiliary equipment such as a charging car, dust collection facilities and an overhead crane, which further improves the working environment and meets environmental protection requirements. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to specific embodiments.

[0024] Embodiment 1:

[0025] It is equipped with a set of equipment for producing ingots of high-end marine nickel silver alloy, high-strength and high-conductivity copper alloy and other grades. The production mode is single-stream production. The weight of a single ingot is 7 tons, the maximum length is 6.3 meters, and it is cast using a mechanical transmission mode.

[0026] The equipment configuration is as follows:

[0027] The melting furnace adopts a medium frequency coreless crucible furnace with a capacity of 10 tons. The furnace shell is designed with the rotating shaft and the furnace nozzle on a horizontal line, so that the melting furnace has a fixed-point casting function. The medium frequency power supply is configured to be 2500KW, and the frequency is selected to be 150HZ, which can ensure that the equipment has sufficient power and sufficient stirring force.

[0028] The holding furnace adopts a horizontal short-coil coreless crucible induction furnace with an upper furnace body, with an effective capacity of 10 tons and a slag removal port provided in the furnace body.

[0029] The holding furnace is equipped with a sealed casting box. During production casting, the molten copper in the casting box does not come into contact with air and flows directly into the casting machine crystallizer. The casting box is equipped with a pouring pipe, which is aligned with the center of the casting machine crystallizer.

[0030] Equipped with thyristor (or IGBT) variable frequency power supply, rated power 400KW, power frequency 55-65HZ, to ensure that the equipment has sufficient heat preservation, heating capacity and sufficient stirring power.

[0031] A mechanical screw semi-continuous casting machine is used. A single bracket is configured on the ingot carrier of the casting machine. The corresponding crystallizer is configured according to the production specifications.

[0032] The maximum load capacity of the casting machine is 11 tons;

[0033] Maximum casting length 6500mm;

[0034] Casting speed range: 0~300㎜ / min, can be adjusted online during production casting;

[0035] Casting speed error: ≤2±㎜ / min.

[0036] The control system has the functions of pulling and stopping casting. The pulling and stopping time can be set to 2-10s and can be adjusted online during production casting.

[0037] Other auxiliary equipment includes one 6-ton vibrating charging car, one set of 60,000 cubic meter air volume dust collection facility, and at least two overhead cranes with a lifting weight of not less than 10 tons, which are used for loading materials on the smelting furnace and lifting finished ingots.

[0038] Embodiment 2:

[0039] It is equipped with a set of equipment for producing ingots of high-end marine nickel silver alloy, high-strength and high-conductivity copper alloy and other grades. The production mode is double-stream production. The weight of a single ingot is 10 tons, the maximum length is 8 meters, and it is cast using a hydraulic transmission mode.

[0040] The equipment configuration is as follows:

[0041] The melting furnace adopts a medium frequency coreless crucible furnace with a capacity of 25 tons. The furnace shell is designed with the rotating shaft and the furnace nozzle on a horizontal line, so that the melting furnace has a fixed-point casting function. The medium frequency power supply is configured to be 4000KW, and the frequency is selected to be 120HZ, which can ensure that the equipment has sufficient power and sufficient stirring force.

[0042] The holding furnace adopts a flat short coil coreless crucible induction furnace with an upper furnace body, with an effective capacity of 25 tons and a maximum capacity of 36 tons. The furnace body is equipped with a slag removal port.

[0043] The holding furnace is equipped with a sealed casting box. During production casting, the molten copper in the casting box does not come into contact with the air and flows directly into the crystallizer of the casting machine. The casting box is equipped with two pouring pipes, which are aligned with the centers of the two crystallizers of the casting machine.

[0044] Equipped with thyristor (or IGBT) variable frequency power supply, rated power 500KW, maximum power 550KW, power frequency 55-60HZ, to ensure that the equipment has sufficient heat preservation, heating capacity and sufficient stirring power.

[0045] A hydraulic semi-continuous casting machine is used. The casting machine ingot carrier is equipped with double brackets. The corresponding crystallizer is configured according to the production specifications.

[0046] The maximum load capacity of the casting machine is 25 tons;

[0047] Maximum casting length 9000mm;

[0048] Casting speed range: 0~300㎜ / min, can be adjusted online during production casting;

[0049] Casting speed error: ≤2±㎜ / min.

[0050] The control system has the functions of pulling and stopping casting. The pulling and stopping time can be set to 2-10s and can be adjusted online during production casting.

[0051] Other auxiliary equipment includes one 6-ton vibrating charging car, one set of 80,000 cubic meter dust collection facility, at least one overhead crane with a lifting weight of not less than 10 tons for loading materials on the smelting furnace, and one overhead crane with a lifting weight of not less than 16 tons for lifting finished ingots.

[0052] Finally, it should be noted that the present invention is not limited to the above-mentioned specific embodiments. Various changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention are all within the protection scope of the present invention.

Claims

1. A method for configuring equipment for producing high-end copper alloy ingots, characterized in that: The equipment includes: a medium frequency melting furnace, a variable frequency short coil crucible induction body holding furnace with an upper furnace body, and a semi-continuous casting machine with pull and stop functions; The medium frequency melting furnace is a coreless crucible furnace with a capacity of 8-20 tons. No intermediate launder is used during furnace tilting and casting, and the molten copper is directly transferred to the holding furnace; The holding furnace is a short coil coreless crucible induction furnace with an upper furnace body, with an effective capacity of 8-25 tons. The furnace body is provided with a slag removal port and a sealed casting box. The molten copper in the casting box does not contact the air and flows directly into the crystallizer of the casting machine; The semi-continuous casting machine has the functions of pulling and stopping casting, and the pulling and stopping time are set to 2-10 seconds, which can be adjusted online during production casting.

2. The equipment configuration method for producing high-end copper alloy ingots according to claim 1, characterized in that: When producing 5-10 ton ingots in a single stream: The capacity of the medium frequency smelting furnace is 8-12 tons, the power of the medium frequency power supply is 2000-2500KW, and the frequency is 120-200HZ; The effective capacity of the holding furnace is 8-12 tons, the power of the variable frequency power supply is 300-400KW, and the frequency is 55-70HZ; The semi-continuous casting machine is of mechanical screw type or hydraulic type, equipped with a single support, with a maximum load capacity of 8-16 tons, a maximum casting length of 6500-9000mm, a casting speed range of 0-300mm / min, a casting speed error of ≤±2mm / min, and a casting box equipped with 1 pouring pipe.

3. The equipment configuration method for producing high-end copper alloy ingots according to claim 1, characterized in that: When double streams produce 5-10 ton ingots: The capacity of the medium frequency smelting furnace is 16-25 tons, the power of the medium frequency power supply is 3500-4000KW, and the frequency is 90-150HZ; The effective capacity of the holding furnace is 16-25 tons, the power of the variable frequency power supply is 350-600KW, and the frequency is 55-70HZ; The semi-continuous casting machine is hydraulic, equipped with double supports, with a maximum load capacity of 16-25 tons, a maximum casting length of 6500-9000mm, a casting speed range of 0-300mm / min, a casting speed error of ≤±2mm / min, and a casting box equipped with 2 pouring pipes.

4. The equipment configuration method for producing high-end copper alloy ingots according to claim 1, characterized in that: The control system of the casting machine allows online adjustment of casting speed and pulling and stopping time to meet the production requirements of different alloy ingots.

5. The equipment configuration method for producing high-end copper alloy ingots according to claim 1, characterized in that: The equipment also includes a vibrating charging car and at least two overhead cranes for loading materials on the smelting furnace and lifting the finished ingots at the end of production.

6. The equipment configuration method for producing high-end copper alloy ingots according to claim 1, characterized in that: The equipment also includes dust collection facilities for collecting and treating industrial waste gas generated during the production process.

7. The equipment configuration method for producing high-end copper alloy ingots according to claim 1, characterized in that: The holding furnace is provided with a slag removal opening for removing slag during the holding process.