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Low-cost recycling method of waste metal
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A scrap metal, low-cost technology, applied in the field of metal materials, can solve problems such as incomplete determination, and achieve the effects of high production efficiency, improved ingot quality, and low equipment requirements
Inactive Publication Date: 2018-02-27
JIANGXI BAOTAI NON FERROUS METAL GRP
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Problems solved by technology
[0004] Aiming at some existing problems in the current domestic waste metal recycling industry, the present invention proposes a low-cost recycling method for waste metals, using waste
Method used
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Embodiment 1
[0026] Weigh the scrap metal according to the weight ratio of scrap copper alloy 45%, scrap iron and steel 50% and scrap aluminum alloy 5%. On it; after electrification, the copper alloy melts first, the internal temperature of the crucible rises, and the steel begins to melt; continue to heat up to 900-1000°C, and after the steel is completely melted, fully stir the melt with a graphite rod, and then cool down to 800-850°C ; Mix Cu-P master alloy and mixed rare earth in a ratio of 1:1 to make a modifier, wrap it with aluminum foil in an amount of 1 to 5 g per kilogram of melt, press it into the melt with a graphite bell jar for melting, and fully Stir; then add scrap aluminum alloy, heat up the melt to 950-1150°C, and fully stir the melt. After the melt temperature is stabilized at 900-1000°C, quickly cast the melt into an iron mold to solidify and form an ingot . Put the ingot into the heating furnace, keep it at 700°C for 5 hours, then turn off the power of the heating fur...
Embodiment 2
[0028] Weigh the scrap metal according to the weight ratio of scrap copper alloy 55%, scrap iron and steel 40% and scrap aluminum alloy 5%. On it; after electrification, the copper alloy melts first, the internal temperature of the crucible rises, and the steel begins to melt; continue to heat up to 900-1000°C, and after the steel is completely melted, fully stir the melt with a graphite rod, and then cool down to 800-850°C ; Mix Cu-P master alloy and mixed rare earth in a ratio of 1:1 to make a modifier, wrap it with aluminum foil in an amount of 1 to 5 g per kilogram of melt, press it into the melt with a graphite bell jar for melting, and fully Stir; then add scrap aluminum alloy, heat up the melt to 950-1150°C, and fully stir the melt. After the melt temperature is stabilized at 900-1000°C, quickly cast the melt into an iron mold to solidify and form an ingot . Put the ingot into the heating furnace, keep it at 750°C for 8 hours, then turn off the power of the heating fur...
Embodiment 3
[0030]Weigh the scrap metal according to the weight ratio of scrap copper alloy 50%, scrap iron and steel 47% and scrap aluminum alloy 3%. On it; after electrification, the copper alloy melts first, the internal temperature of the crucible rises, and the steel begins to melt; continue to heat up to 900-1000°C, and after the steel is completely melted, fully stir the melt with a graphite rod, and then cool down to 800-850°C ; Mix Cu-P master alloy and mixed rare earth in a ratio of 1:1 to make a modifier, wrap it with aluminum foil in an amount of 1 to 5 g per kilogram of melt, press it into the melt with a graphite bell jar for melting, and fully Stir; then add scrap aluminum alloy, heat up the melt to 950-1150°C, and fully stir the melt. After the melt temperature is stabilized at 900-1000°C, quickly cast the melt into an iron mold to solidify and form an ingot . Put the ingot into the heating furnace, keep it at 850°C for 10 hours, then turn off the power of the heating fur...
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Abstract
The invention provides a low-cost recycling method of a waste metal. The method is characterized by comprising the following steps of preparing the waste metal according to the weight ration of 45.00%-55.00% of waste copper alloy, 40.00%-50.00% of waste steel and 3.00%-5.00% of waste aluminum alloy; adding the waste metal into an induction smelting furnace for melting; adding a proper amount of modifier into the melt; after full stirring, slagging-off and standing are carried out, casting the melt into an iron mold so as to obtain a cast ingot; placing the cast ingot in a heating furnace and carrying out heat preservation at the temperature of 700-850 DEG C for 5-10 hours; then closing the heating furnace power supply, opening the furnace door, and cooling the cast ingot to the room temperature along with the furnace; placing the cast ingot in the heating furnace again, and carrying out heat preservation at the temperature of 300-400 DEG C for 0. 5-2.0 hours; discharging the cast ingotfrom the furnace and carrying out air cooling so as to obtain a finished product. According to the low-cost recycling method of the waste metal, ''p+rare earth'' composite modification treatment is adopted, thus the quality of the melt and the cast ingot is effectively improved; the optimized cast ingot is subjected to two-stage homogenization heat treatment, so that the quality of the cast ingotis improved; and meanwhile, the waste metals of three types with unknown components are recycled and reused, the production efficiency is high, and the comprehensive mechanical property of the obtained finished product is good.
Description
technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a low-cost recycling method for waste metals. Background technique [0002] The replacement of old and new during the use of metal products is an inevitable phenomenon. Because metal products are corroded, damaged or naturally eliminated during service, a large amount of scrap metal is produced every year. If these waste metals are discarded at will, it will not only pollute the environment, but also waste limited metal resources. Scrap metal, as a renewable resource, is becoming increasingly prominent in the context of increasingly scarce mineral resources. [0003] Scrap metal smelting is an important aspect of the metallurgical industry. In fact, due to economic, technical and environmental reasons, scrap metal is used as a large amount of raw materials for metal smelting in ferrous and non-ferrous metallurgical industries every year. The development of...
Claims
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Application Information
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