Casting production process will produce a lot of waste, such as waste sand, waste slag, waste gas, etc., these wastes not only cause pollution to the environment, but also occupy a lot of land and resources. Therefore, how to effectively treat and recycle these wastes is of great significance for improving the economic benefits of enterprises and protecting the environment. This paper will discuss the methods and ways of waste treatment and resource utilization in casting production, in order to provide reference for related enterprises and investors.
Castings production waste mainly includes waste sand, waste slag, waste gas, etc. If these wastes are not properly treated, it will have a serious impact on the environment and human health. For example, waste sand contains a large number of heavy metal elements, such as lead, mercury, etc., which will cause pollution to soil and water quality; The waste residue contains a lot of harmful substances, such as carbon black, sulfide, etc., which will pollute the atmosphere and water. Waste gas contains a lot of harmful gases, such as carbon dioxide, sulfur dioxide, etc., which will pollute the atmosphere. Therefore, proper disposal of castings production waste is of great significance for the protection of the environment and human health.
Casting production waste treatment method
Waste sand treatment: Waste sand contains a large number of heavy metal elements, which can be treated by physical and chemical methods. Physical methods including screening, cleaning, etc., can remove impurities and harmful substances in the waste sand; Chemical methods, including acid leaching and alkali leaching, can extract valuable metal elements from waste sand. The treated waste sand can be used to make building materials, roadbed, etc.
Waste residue treatment: Waste residue contains a large number of harmful substances, which can be treated by high temperature incineration, solidification and other methods. High temperature incineration can remove the harmful substances in the waste residue and use the waste heat to generate electricity. Solidification can convert waste slag into a solidified body for use in landfills or in the manufacture of building materials.
Waste gas treatment: Waste gas contains a large number of harmful gases, which can be treated by absorption, adsorption, catalysis and other methods. Absorption Chemical absorbers can be used to absorb harmful gases; Adsorbents such as activated carbon can be used to adsorb harmful gases. Catalysis can convert harmful gases into harmless substances. The treated exhaust gas can be discharged into the atmosphere or used in the production process.
Fourth, casting production waste resource utilization way
Manufacturing building materials: Processed waste sand, waste slag can be used to manufacture building materials, such as bricks, cement, etc. These building materials can replace traditional building materials, reducing the consumption of natural resources and environmental pollution.
Recovery of valuable metals: After treatment of waste sand, waste slag can be recovered of valuable metal elements, such as copper, iron, zinc, etc. These valuable metals can be used to make new products or reused as raw materials.
Production of energy: High temperature incineration of waste residue can produce a large amount of heat energy, which can be used for electricity generation or heating. These energy sources can replace traditional fossil fuels and reduce environmental pollution and greenhouse gas emissions.
For land improvement: Treated waste residue can be used for land improvement to improve soil fertility and permeability. These lands can be used for agricultural production and vegetation restoration to improve the ecological environment.
Waste treatment and resource utilization in castings production are of great significance to protect the environment and improve the economic benefits of enterprises. Through proper disposal and resource utilization of castings production waste, it can reduce the consumption of natural resources and environmental pollution, and improve the economic benefits and social image of enterprises. Relevant enterprises and investors should pay attention to the specific implementation and application of these methods and approaches, and formulate reasonable waste treatment and resource utilization plans to achieve the sustainable development goals.
