When an old refrigerator finally breaks down and cannot be repaired, the owner is faced with a logical question about its future fate. Most often, equipment is sent for recycling, where valuable resources are extracted from it for recycling. It is at this moment that it becomes relevant to understand exactly what materials are hidden inside the body of household appliances.
A refrigerator is a complex unit consisting of many components, each of which has its own value. The bulk of the device consists of ferrous metals, represented by case steel, but it is non-ferrous metals that give the product significant economic attractiveness. Understanding the internal structure will help not only to competently pass the equipment, but also to better understand the principles of its operation.
In this article we will analyze in detail what non-ferrous metals are in the refrigerator present in the largest quantities, where they are located and how to correctly identify them during disassembly. You will also learn about the factors influencing the final weight of the scrap and receive practical recommendations for a safe dismantling procedure.
General refrigerator design and materials
A modern refrigerator is a multilayer structure, where each element performs a strictly defined function. The outer casing and inner chamber are most often made of sheet steel, which is classified as ferrous metal. However, the “heart” of the cooling system is the compressor, and the “circulatory system” is the pipelines, in which the bulk of valuable non-ferrous alloys are concentrated.
The amount of non-ferrous metals directly depends on the year of manufacture and model of the device. Old Soviet units, such as ZIL or Saratov, used significantly more copper and brass than modern budget models. Engineers of the past strove for durability and maintainability, laying thick pipe walls and powerful electric motors, which today makes them a real “ore” for processors.
It is important to understand that the extraction of metals is not just mechanical disassembly, but a process that requires compliance with safety regulations. A refrigerant circulates inside the system, and the thermal insulation may contain polyurethane foam. Disassembly must be carried out in a well-ventilated area and using protective gloves.
⚠️ Attention: It is strictly forbidden to open a sealed compressor with a grinder or saw pipelines without preliminary release of freon. Residual pressure and chemical activity of substances can lead to injury or fire.
Structurally, the refrigerator can be divided into several zones based on non-ferrous metal content: evaporator, condenser, compressor unit and electrical wiring. Each of these zones requires an individual approach during dismantling to maximize the preservation of the value of the recovered raw materials.
Copper: “King” of refrigerated scrap
By far, the most valuable component that scrap metal dealers are looking for is copper. This metal has excellent thermal conductivity and corrosion resistance, which makes it indispensable in refrigeration equipment. On average, copper makes up about 1-2% of the total mass of the refrigerator, but its cost per kilogram is much higher than that of steel or aluminum.
The main places where copper occurs in a refrigerator are the cooling system pipelines. The tubes can be made of pure copper or copper alloys. In older models, the pipe diameter is larger and the walls are thicker, which increases the yield of pure metal. In modern units, manufacturers often replace part of the copper lines with aluminum or copper-plated steel to reduce the cost of the design.
In addition to pipes, copper is found in large quantities in the compressor electric motor. The stator winding is made of copper wire, which makes up a significant part of the weight of the compressor itself. To extract this copper, the compressor must be completely disassembled by sawing the housing and removing the core.
Also, copper contacts and wires are present in the control and lighting systems. Although the weight of the wiring is small, it belongs to the category of electrical copper, which is valued higher than technical (pipe). When handing over scrap, it is important to sort these fractions to obtain maximum profit.
Aluminum and its alloys in details
The second most common non-ferrous metal in the refrigerator is aluminum. This lightweight and durable material is widely used where high heat transfer with minimal weight is important. Unlike copper, aluminum is easier to process, but its cost on the scrap market is significantly lower.
Most often, aluminum can be found in the following components:
- 🔹 Evaporator: in many modern models (especially No Frost systems), the evaporator is made of aluminum tubes with welded plates or is completely aluminum.
- 🔹 Condenser: the rear grille on older models was sometimes made of aluminum, although steel was more common.
- 🔹 Compressor housing: some models of hermetic compressors have an aluminum casing, although there is still steel and copper inside.
- 🔹 Fastening elements: various brackets, holders and decorative linings are often cast from aluminum alloys.
Particular attention should be paid to the evaporator. If you see silvery, light tubes inside the freezer (behind a plastic panel or openly), then there is a high probability that it is aluminum. It is easy to distinguish it from steel by the lack of reaction to a magnet and the characteristic light gray color on the cut.
When handing over aluminum, it is important to separate it from other metals. Mixing with steel or plastic can reduce the category of scrap and, accordingly, the price. Sorting at the disassembly stage is the key to a profitable deal.
Compressor: source of copper and steel
The compressor is the heaviest and most complex component of the refrigerator. This is where the bulk of the ferrous metal is concentrated, but its “non-ferrous” potential is important to us. Inside the sealed casing there is an electric motor and a piston group.
The weight of the compressor can vary from 8 to 12 kg or more. In this case, the yield of non-ferrous metal (mainly copper from the windings) is approximately 10-15% of its mass, if we count only the wiring. However, if we consider the compressor as a whole as a unit, it is handed over less often, preferring to extract the copper manually to increase profitability.
Inside the compressor there are also brass and bronze bushings, which are used as plain bearings for the motor shaft. These parts, although small in size, are high-quality non-ferrous alloys. Brass is an alloy of copper and zinc, it has a characteristic yellowish tint and is easy to process.
The process of extracting copper from a compressor is labor-intensive:
- It is necessary to drain the oil (it is a waste product and requires special disposal).
- Saw the steel housing grinder along the seam.
- Remove the stator with the winding.
- Burn or cut the copper winding from the grooves.
⚠️ Attention: When sawing the compressor, use a respirator. Inside there may be an asbestos gasket (in older models) or oil vapors, the inhalation of which is harmful to health.
Comparative table of metal content
To better navigate the expected yield during disassembly, let's consider the average data. They will help you figure out whether the gamble is worth the candle if you plan to disassemble several pieces of equipment.
| Refrigerator assembly | Main non-ferrous metal | Approximate weight (g) | Share in total weight |
|---|---|---|---|
| Pipeline (copper) | Copper | 500 - 1500 | 1-2% |
| Compressor winding | Copper | 800 - 1200 | 1-1.5% |
| Evaporator | Aluminum / Copper | 1000 - 2000 | 1.5-3% |
| Wiring and contacts | Copper | 200 - 400 | 0.5% |
| Brackets and parts | Aluminum / Brass | 300 - 600 | 0.5-1% |
The table shows that the total yield of non-ferrous metals rarely exceeds 5-6 kg from one refrigerator. The rest is heavy ferrous metal (case, compressor, shelves) and plastic. The maximum yield of copper is observed in Soviet-made refrigerators produced before 1990.
Brass and bronze: rare but valuable finds
Unlike copper and aluminum, which are found in large quantities, brass and bronze in the refrigerator are parts of small volume, but high specific cost. They are often overlooked and thrown away with general scrap, which is a mistake.
Where to look for these metals? First of all, these are the connecting elements of pipelines - fittings, adapters and valves, if they have been preserved. Brass is also used in the electrical contacts of the start relay and thermostat. The contacts can be plated with silver, which further increases their value.
Bronze bushings, as mentioned earlier, are located inside the compressor. Some models of system fans No Frost can also use bronze plain bearings, although in modern cheap models they have been replaced with plastic bushings.
What to do with plastic elements during disassembly?
Plastic (case, shelves, drawers) is not a valuable metal. It must be separated and disposed of separately as household waste or taken to special plastic collection points. It is strictly forbidden to burn plastic to “clean” metal due to the release of toxic substances.
Electronics and wiring
A modern refrigerator is not only metal, but also complex electronics. Control boards, sensors, wires - all of this contains precious and non-ferrous metals, but in microscopic quantities. Disassembling electronics at home for the sake of gold or palladium is impractical and dangerous.
However, copper wiring is of interest. The wiring harnesses going to the compressor, lamp and sensors can be carefully removed and stripped of insulation. A stripped copper core (“burnt wire”) is more expensive than an insulated wire. For stripping, you can use special machines or, as a last resort, careful burning (in compliance with fire safety and environmental measures), but it is better to hand over the cable as is if the volumes are small.
The control unit may contain small transformers containing copper windings. If you are disassembling the refrigerator completely, it makes sense to remove the entire board and return it as an electronic board, where payment is made for the content of precious metals.
Practical tips for disassembly and safety
If you decide to disassemble the refrigerator yourself, you will need a certain set of tools and adherence to strict rules. This is not only a matter of profit, but also your personal safety.
Required tools:
- 🔸 Grinder (angle grinder) with metal discs - for quickly opening the compressor and cutting pipes.
- 🔸 Wire cutters and side cutters - for cutting wires and small parts.
- 🔸 Screwdrivers (Phillips and flathead) - for dismantling plastic and electronics.
- 🔸 Hammer and chisel - for knocking out shafts and heavy elements.
- 🔸 Safety glasses and gloves are a mandatory minimum equipment.
☑️ Checklist before starting disassembly
It is best to start the process by dismantling all removable plastic elements and doors. This will make it easier to access the insides. Then the tubes are carefully cut. If you hear a hissing sound, it means freon is still in the system. After waiting for the gas to escape, you can begin cutting out the copper coil.
Insulation requires special attention. Older refrigerators may have used glass wool or asbestos-containing materials between the cabinet walls. You need to work with them extremely carefully, avoiding dust getting into your respiratory tract. Modern models use polyurethane foam, which is safe, but makes access to the walls very difficult.
⚠️ Attention: Never try to extract copper by burning the insulation of the wires or housing in an open fire. This causes enormous harm to the environment, spoils the quality of copper (it becomes brittle) and may result in a fine from regulatory authorities.Economic feasibility and ecology
Is the game worth the candle? If you have one old refrigerator, the cost of electricity (grinder), tools (discs) and time may exceed the cost of the scrap received. Handing over the entire refrigerator to a collection point is often more profitable and easier than doing handicraft cutting.
However, if you do this professionally or have access to a large amount of equipment (for example, from catering establishments or hotels), then sorting and extracting non-ferrous metals becomes a profitable business. In this case, optimization processes and the availability of good tools come to the fore.
Do not forget about the environmental aspect. Proper disposal of your refrigerator prevents freon (which destroys the ozone layer) and oil from entering the atmosphere. By handing over equipment to specialized points, you contribute to preserving the environment, even if your goal is profit.
In conclusion, a refrigerator is a real storehouse of non-ferrous metals hidden behind layers of steel and plastic. Knowing where to look for copper, aluminum and brass turns a pile of old iron into a valuable resource. But remember: safety and legality of actions should always be a priority over immediate benefits.
What to do with the remains of polyurethane foam?
Polyurethane foam, which is removed from the walls, does not burn, but melts and emits acrid smoke. It is best to press it and hand it over as construction waste or plastic (if the collection point accepts it), but not to burn it at home.
Frequently asked questions (FAQ)
Approximately how many kilograms of copper can be obtained from one refrigerator?
On average, from one standard two-chamber refrigerator you can get from 1.5 to 3 kg of copper, if you count only the pipes and compressor windings. In old Soviet models, the yield may be higher, in modern ones it may be lower due to the use of aluminum.
Are copper and aluminum magnetic?
No, neither copper nor aluminum have ferromagnetic properties. If you bring a strong neodymium magnet to the tube, it will not be attracted. This is the easiest way to distinguish them from steel or iron coated with copper paint.
Is it dangerous to open the compressor yourself?
Yes, it is dangerous. There may be residual pressure inside, oil vapors and asbestos gaskets (in older models). In addition, when working with an angle grinder, there is a risk of damage to the disc on internal metal parts. Observance of eye and respiratory protection measures is required.
Is it possible to hand over the entire refrigerator without disassembling it?
Of course. Many scrap yards will accept whole refrigerators, but will charge them as "mix" or "heavy steel" at a low price. Disassembly and sorting can increase revenue by 3-5 times, but require time and effort.
Where is the most aluminum in the refrigerator?
The main amount of aluminum is found in the evaporator (especially in No Frost systems) and sometimes in the condenser. Also, some internal panels and parts of the compressor housing may be aluminum.