The question of how much non-ferrous metal is contained in the refrigerator often arises among owners of old equipment who plan to sell it for scrap, or among craftsmen engaged in recycling. At first glance, the body of the household appliance appears to be entirely made of steel, but valuable resources such as copper, aluminum and brass are hidden inside. Understanding the real composition of the unit helps to estimate its residual value after failure.
The average household refrigerator is not a monolith of ferrous metal. Engineers use various alloys to provide thermal conductivity, tightness and electrical conductivity. Copper here acts as the main conductor of cold and electricity, while aluminum is often used in modern evaporators to reduce weight. The exact weight of non-ferrous metals directly depends on the year of manufacture and the energy efficiency class of the device.
It is important to consider that production technologies are changing, and the amount of precious metals or pure copper in new models may differ from their Soviet counterparts. If you plan to disassemble, you will need not only physical strength, but also knowledge of the design. In this article we will analyze in detail where exactly non-ferrous metals are hidden and what weight can be obtained at the output.
Main sources of copper in the design
The main source non-ferrous metal in any refrigerator is its compressor-condensing unit. It is here that the bulk of copper is concentrated, which is valued most highly when selling scrap. In old Soviet models, such as ZIL or Biryusa early years of production, copper tubes were used everywhere because of their durability and excellent heat transfer.
The pipelines connecting the compressor to the condenser and evaporator are also made of this material. However, in modern units, manufacturers often replace copper with coated steel or aluminum in areas that do not require high pressure brazing. This reduces cost but makes recycling more difficult. The weight of copper in a compressor can vary from 300 grams to 1.5 kilograms, depending on the power of the motor.
Why is copper better than aluminum for refrigeration systems?
Copper has higher thermal conductivity and ductility, which allows you to make thin walls of tubes without loss of strength. In addition, copper connections are easier to solder, they are less susceptible to oxidation when in contact with refrigerant and oil, which guarantees a long service life of the circuit.
When dismantling To remove it, you will have to saw the compressor housing, which requires a special tool. In the condenser (grid at the back), copper can also be replaced with steel, so you should not count on pure non-ferrous metal in all components.
Aluminum and its role in heat transfer
Aluminum is the second most important non-ferrous metal in the composition of the refrigerator. It is lighter than copper and cheaper, which has made it the standard for the production of evaporators in most modern models, including brands LG, Samsung i Indesit. The evaporator is a unit that directly cools the chamber, and the use of aluminum allows for efficient heat removal.
Unlike copper, aluminum is more difficult to solder at home, and it is more susceptible to corrosion if the protective layer is damaged. The weight of aluminum parts can be from 1 to 3 kilograms, depending on the dimensions of the refrigerator. In systems No Frost aluminum elements are also used in air ducts and dampers.
It is worth noting that in some In budget models, even capacitor grilles can be made of aluminum, although this is less common. The type of metal can be determined visually: aluminum is matte and light, non-magnetic, while a coated steel tube will be heavy and magnetic.
Distribution of metals among refrigerator components
For the convenience of assessing the potential yield of scrap, it is worth considering the specific distribution of materials among the main components. This will help you understand whether it is worth disassembling the unit completely or whether it is enough to remove the most valuable parts. The structure of a modern refrigerator is complex, and each element performs its function using the specific properties of metals.
Below is a table showing the approximate content of non-ferrous metals in various components of a typical two-chamber refrigerator. The data is averaged, since specific models may differ in design solutions.
| Refrigerator assembly | Main non-ferrous metal | Approximate weight (g) | Note |
|---|---|---|---|
| Compressor (motor) | Copper (winding) | 300 - 900 | Depends on power |
| Pipelines | Copper / Steel | 200 - 600 | In older models - copper |
| Evaporator | Aluminum | 800 - 2500 | Depends on the volume of the chambers |
| Condenser (grid) | Steel / Aluminum | 500 - 1500 | Often coated varnish |
| Electronics and wiring | Copper | 100 - 300 | Cables and boards |
As can be seen from the table, the main weight of non-ferrous metals is concentrated in the evaporator and compressor. However, removing these parts requires complete disassembly of the housing, removal of thermal insulation and dismantling of plastic elements. Ferrous metal (body, shelves, doors) makes up up to 80-90% of the total mass of the device.
Differences between old and new models
A significant difference in quantity non-ferrous metal is observed between Soviet-made refrigerators and modern European or Asian counterparts. In the Soviet era, engineers did not save on materials, so in units Minsk or Orsk it was possible to find significantly more copper in tubes and motor windings.
Modern energy efficiency and environmental standards dictate their own rules. The use of thinner tubes, aluminum alloys and composite materials reduces the weight of the device, but also reduces the amount of valuable scrap. In addition, new models more often use inverter-type compressors, the design of which may differ from classic piston motors.
☑️ Signs of a copper-rich refrigerator
Also worth keep in mind that in very old models, electrical contacts and relays could contain precious metals such as silver or platinum, but their quantity is so microscopic that separating them at home is not economically feasible.
Extraction technology and safety
The process of extracting non-ferrous metals from the refrigerator is not just disassembling, but working with potentially dangerous substances. A refrigerant (freon) circulates inside the circuit, which can be harmful if in contact with an open flame or under certain conditions. Before starting any work (cutting), you must make sure that the system is completely depressurized in a well-ventilated place.
To extract copper from the compressor, you will need a grinder with a metal disc. The motor housing is thick, and simply unscrewing the bolts will not help. Aluminum evaporators are often glued to the back of the chamber or foamed, requiring careful cutting to avoid damaging the metal.
⚠️ Attention: Never try to burn insulation from wires or plastic parts of the refrigerator to obtain metal. When plastic burns, toxic substances are released, and thin metal can lose its properties and become unsuitable for recycling. In addition, open burning is prohibited by environmental legislation.
When working with the tool, use safety glasses and gloves. Sharp edges of cut metal and steel filings can cause serious injury. Also remember that some components, especially thermostats and sensors, may contain mercury vapor, so it is better to take them to specialized points rather than disassemble them yourself.
Economic feasibility of scrapping
Is the gamble worth the candle? This is the main question that arises when thinking about disassembling a refrigerator for the sake of non-ferrous metal. The market value of copper and aluminum is really high, but let's do the math. From one refrigerator, on average, you can get about 1.5–2 kg of copper (in the best case) and up to 2–3 kg of aluminum.
If you subtract the cost of tool depreciation, electricity and, most importantly, your time spent on disassembling, clean cutting and transportation, the profit can be symbolic. Delivery of the entire refrigerator as ferrous scrap is often faster, although less profitable in terms of price per kilogram.
However, if you already have experience and the necessary tools, or if you got the refrigerator for free and it is easier disassemble rather than take it out entirely (for example, it is on the top floor without an elevator), then extracting non-ferrous metal makes sense. Otherwise, it is easier to use the services of services that remove old equipment for a small fee or free of charge.
What to do with freon before delivery?
Ideally, freon should be pumped out by a specialist using a recuperator so as not to enter the atmosphere. However, in conditions of private recycling, craftsmen often simply pierce the pipe on the street, allowing the gas to evaporate, which is formally a violation of environmental standards, but is practiced everywhere.
Frequently asked questions (FAQ)
Approximately how many kilograms of copper can be obtained from one old refrigerator?
From an old Soviet one refrigerator, you can extract from 1 to 2.5 kg of copper, if you take into account the motor windings and all tubes. In modern models, the copper yield is much less - often no more than 0.5–0.8 kg, since many elements are replaced with steel or aluminum.
Is there gold or silver in the refrigerator?
Technically, yes, in microscopic quantities. Relay contacts, some elements of electronic control boards may contain gold or silver. However, their content is so small (fractions of a gram) that the chemical separation of these metals at home is dangerous, expensive and does not pay off.
Is it possible to hand over an entire refrigerator as non-ferrous scrap?
No, scrap metal collection points classify refrigerators as “electrical scrap” or “black scrap” (size). For non-ferrous metal (copper, aluminum) they pay only for cleaned, sorted parts. A completely delivered refrigerator will be valued at the price of ferrous metal, possibly with a deduction for freon disposal.
Does the brand of the refrigerator affect the amount of non-ferrous metal?
Yes, it does indirectly. European brands (Liebherr, Bosch) often used more copper in heat exchangers in older models. Asian manufacturers in the budget segment are actively introducing aluminum tubes and steel capacitors, which reduces the amount of valuable scrap.
Is it dangerous to cut a refrigerator with a grinder?
Yes, it is dangerous. In addition to the risk of injury from the disc or debris, there is a risk of igniting the oil from the compressor or residual flammable refrigerant gas (if isobutane is used). It is recommended to first release the gas and drain the oil, and also work away from flammable objects.