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A method for resourceful treatment of aluminum alloy melting and casting aluminum slag

An aluminum alloy and recycling technology, which is applied in the field of comprehensive recycling of aluminum processing waste, can solve problems such as environmental pollution and waste of resources, and achieve the effects of less investment in equipment, high production efficiency, and simple methods

Active Publication Date: 2020-09-08
云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum slag is some impure mixed metal slag produced during aluminum smelting. These casting aluminum slags usually contain a certain amount of fluorine, and their leaching toxicity tests usually exceed the requirements of general industrial second-class solid waste. resources and pollute the environment

Method used

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  • A method for resourceful treatment of aluminum alloy melting and casting aluminum slag

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Effect test

Embodiment 1

[0024] Embodiment 1: as figure 1 As shown, the method for resourceful processing of the aluminum alloy casting aluminum slag, the specific steps are as follows:

[0025] Put the aluminum slag produced in the process of aluminum alloy melting and casting into the wind separator, separate the metal aluminum alloy in the aluminum slag through wind separation, then put the separated aluminum slag in the boiling furnace, and add it to the boiling furnace A mixture of sodium carbonate and calcium carbonate (the mass ratio of sodium carbonate and calcium carbonate is 1:1), in which the mass ratio of aluminum slag to the mixture of sodium carbonate and calcium carbonate is 1:4, react at 1100 °C for 3 hours, and put it in a boiling furnace Aluminum slag calcined sand is obtained at the bottom of the fluidized bed furnace, and high-temperature dust-containing flue gas is obtained at the top of the fluidized bed furnace, and then the high-temperature dust-containing flue gas is passed in...

Embodiment 2

[0027] Embodiment 2: put the aluminum slag produced in the aluminum alloy melting and casting process into the air separator, separate the metal aluminum alloy in the aluminum slag through air separation, then place the separated aluminum slag in the boiling furnace, and Add calcium carbonate into the fluidized furnace, wherein the mass ratio of aluminum slag to calcium carbonate is 1:0.2, react at 1300 ° C for 2 hours, obtain aluminum slag calcine at the bottom of the fluidized furnace, and obtain high-temperature dust-containing flue gas at the top of the fluidized furnace, and then The high-temperature dust-laden flue gas is passed into the high-temperature dust collector, and the reaction temperature of the high-temperature dust collector is controlled at 800°C. After 1 minute, the dust is obtained in the dust collection system of the high-temperature dust collector, and the dust is mixed with the aluminum slag calcined sand obtained by calcining the fluidized fluidized furn...

Embodiment 3

[0029] Embodiment 3: put the aluminum slag produced in the aluminum alloy melting and casting process into the air separator, separate the metal aluminum alloy in the aluminum slag through air separation, then place the separated aluminum slag in the boiling furnace, and Add a mixture of sodium carbonate, calcium carbonate and magnesium carbonate to the boiling furnace (the mass ratio of sodium carbonate, calcium carbonate and magnesium carbonate is 2:1:1), and the mass ratio of aluminum slag to the mixture is 1:5. React for 7 hours, get aluminum slag calcined sand at the bottom of the fluidized bed furnace, and get high-temperature dusty flue gas at the top of the fluidized bed furnace, then pass the high-temperature dusty flue gas into the high-temperature dust collector, and control the reaction temperature of the high-temperature dust collector to 800 ° C for 1 min After the dust is obtained in the dust collection system of the high-temperature dust collector, the dust is m...

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Abstract

The invention discloses a method for recycling an aluminum alloy casting aluminum residue. The method comprises the steps of adopting the aluminum residue produced in an aluminum alloy casting processas a raw material, winnowing, sintering at high temperature, collecting dust at high temperature, collecting dust at low temperature, and obtaining a cement accelerator product and a refining agent product for aluminum ingot casting. The invention provides the effective method for effectively and comprehensively recycling the aluminum residue, meanwhile, the cement accelerator product and the refining agent product for aluminum ingot casting can be prepared, hazardous wastes can be recycled harmlessly, the obtained product can be applied to actual production, and the method provided by the invention is simple, easy to operate, green, environmental-friendly, and wide in application prospect.

Description

technical field [0001] The invention relates to a method for recycling aluminum alloy casting aluminum slag, and belongs to the technical field of comprehensive recovery and utilization of aluminum material processing waste. Background technique [0002] Since 2001, the consumption of aluminum profiles in my country has been growing rapidly. Over the years, it has become the largest market for aluminum profile consumption in the world, accounting for about 58% of the global aluminum profile consumption. From 2012 to 2016, China consumed about 12.56 million tons, 13.96 million tons, 15.44 million tons, 16.82 million tons, and 18.82 million tons of aluminum profile products respectively. [0003] A large amount of solid pollutants will be produced during the processing of aluminum materials, and the aluminum casting slag is one of the relatively large output. Aluminum slag is some impure mixed metal slag produced during aluminum smelting. These casting aluminum slags usually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B103/12
CPCC04B40/0046C04B2103/12C22B21/0069C22B21/062C04B18/088C04B18/023C04B22/06Y02P10/20
Inventor 于站良吴文卫杨子轩蒋庆来钱琪所杨敏毕廷涛孙晶王金华姬成岗
Owner 云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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