The question of the content of non-ferrous metals in household appliances is becoming increasingly relevant for those who want to properly dispose of an old unit or sell it for scrap. Many owners believe that a significant amount of valuable ore is hidden inside the massive hull, but the reality often differs from expectations. Understanding the design of the compressor and heat exchanger is necessary to correctly assess the potential profit from the delivery of equipment.
It is worth immediately noting that the total weight of the device and the amount of useful metal are completely different quantities. The main volume is occupied by steel, plastic, insulating materials and refrigerants, which are of no value to processors in the context of non-ferrous metals. To obtain copper, serious physical work will be required to dismantle and cut components.
In this article we will take a detailed look at where exactly to look for valuable material, what tools will be needed for extraction and why the cost of scrap may surprise you. You will learn about the differences between old Soviet models and modern technology, as well as how to safely dismantle without harm to health.
Where exactly is copper located in the structure
The main source non-ferrous metal in any refrigerator is the compressor-condensing unit. It is here that the processes of compression and circulation of the refrigerant take place, requiring the use of materials with high thermal conductivity and anti-corrosion resistance. In old models produced before the mid-90s, copper was used generously, while in modern devices manufacturers are actively introducing aluminum alloys.
The second place where this metal can be found is shut-off valves and connecting tubes suitable for the motor. However, their number is minimal and they are often made of copper-plated steel or brass. The main interest for the dealer is the internal winding of the electric motor and the heat exchanger tube.
It is important to understand that in modern models of the class Energy Saving or No Frost the design can be significantly changed. The evaporator tubes, which were previously hidden inside the cabinet, are now often placed on the back wall and are made of aluminum, which significantly reduces the final yield of precious metal during processing.
⚠️ Attention: There may be residual freon inside the circulation system. If the tubes are damaged, it instantly evaporates, displacing oxygen. Carry out all work only in a well-ventilated area or outdoors.
Why is copper better than aluminum?
Copper has significantly higher thermal conductivity and ductility, which makes it ideal for heat exchangers. However, its high cost forces manufacturers to look for alternatives, even if they are less efficient.
The weight of copper in a compressor: reality versus myths
The most common myth is that the compressor is half copper. In fact, electric motor, located inside the sealed casing, contains a copper winding, but its weight is only a part of the total mass of the assembly. The steel housing, shaft, piston group and oil occupy a larger volume.
To extract the metal, it is necessary to open the welded compressor housing, which requires the use of a grinder or a powerful hacksaw. Inside you will find a wound stator. It is this winding that is of interest, but separating pure copper from electrical steel is a labor-intensive process that is often not economically feasible for a single unit.
The average weight of copper winding in a household compressor varies depending on the power and year of manufacture. In old heavy motors from the times of the USSR, winding could reach impressive values, while modern compact models contain a minimum of material.
☑️ Tools for disassembling the compressor
It is worth considering that many scrap collection points accept compressors entirely at the price of ferrous metal or with a small premium, since recycling winding at home is difficult. If you plan to return the entire device, the weight of copper is not taken into account in the calculation.
Differences between old and new models
The evolution of refrigeration equipment has directly affected the content of non-ferrous metals. Soviet refrigerators, such as ZIL, Saratov or Biryusa early series, were manufactured with a large margin of safety and using traditional materials. The condenser and evaporator tubes in them are almost always made of pure copper.
In contrast, equipment produced after 2000 is often equipped with aluminum heat exchangers. Aluminum is lighter, cheaper to produce, but more difficult to solder and repair. You can determine the material visually: copper has a characteristic reddish-golden hue that does not fade when freshly cut, while aluminum is silvery and matte.
It is also worth paying attention to the system No Frost. These models often replace the copper circuit with an aluminum radiator located behind the rear panel of the freezer. This is done to reduce the cost of production, but reduces the liquidity of the device as a source of recyclable materials.
⚠️ Attention: Do not try to identify the metal with a magnet. Neither copper nor aluminum are magnetic, so this test will not help tell them apart. Focus only on color and weight.
Table of metal content in different components
For clarity, we present average data on the copper content in different parts of the refrigeration unit. These numbers will help you form a realistic idea of what can be obtained after cutting.
| Unit unit | Material of execution | Approximate weight (g) | Liquidity |
|---|---|---|---|
| Winding compressor | Copper wire | 300 - 900 | High |
| Condenser tubes (old) | Copper | 400 - 700 | High |
| Tubes capacitors (new) | Aluminium/Steel | 300 - 500 | Low |
| Shut-off valves | Brass/Steel | 50 - 100 | Medium |
| Electrical wiring | Copper | 100 - 200 | Average |
As can be seen from the table, the main weight falls on the tubes and winding. However, the total yield of pure metal rarely exceeds 1-1.5 kg, even for large old models. The bulk of the device is steel and insulation.
Safe cutting technology
The process of metal extraction begins with preparing the workplace. You will need a stable surface, access to electricity for power tools and personal protective equipment. Safety should be a priority, since working with metal shavings and sharp edges is dangerous.
The first step is always the removal of all plastic elements, shelves and doors. Then, using tin snips or wire cutters, all electrical wiring is cut off. It makes sense to strip the cable of insulation only if you have a bulk quantity, otherwise it is handed over in a bundle.
Next comes the most labor-intensive stage - dismantling the heat exchanger. In older models, the radiator grille on the rear wall is often glued to a metal sheet. It needs to be carefully beaten with a hammer or cut off with a grinder. Be careful not to damage the tubes if you plan to sell them as is, although scrap copper pipes are readily accepted.
To remove the winding from the compressor you need to:
- 🔨 Cut off the upper part of the compressor housing (the “cap”) with a grinder.
- 🔨 Remove the insides (stator with winding).
- 🔨 Use a chisel to cut off one side of the winding.
- 🔨 Knock out the steel core, leaving clean copper wire.
This process requires significant physical effort. It is often easier to hand over the compressor to a specialized point where there are shredders for recycling electric motors.
Economic feasibility and disposal
When wondering whether it is profitable to disassemble a refrigerator, you need to take into account current scrap prices. The cost of copper scrap fluctuates, but even at high prices, the income from one unit will be an insignificant amount, which will barely cover the costs of electricity and tools.
A more rational approach is to hand over the entire refrigerator to collection points for household appliances or call a specialized recycling service. Some companies are even willing to pay you for the old unit if it is in working condition or can be restored.
It is also worth remembering the environmental side of the issue. The refrigerants contained in the system, when released into the atmosphere, destroy the ozone layer. Professional recycling ensures the safe removal of freon and the recycling of insulating materials containing harmful substances.
If you decide to donate metal, sort it. Pure copper (wire, tubes) is more expensive than brass or bronze. By mixing metals, you reduce the overall cost of the batch, since the receiver will evaluate everything at the price of the cheapest component.
Frequently asked questions (FAQ)
Is it possible to return the refrigerator to the store when buying a new one?
Yes, many large retailers offer the service of recycling old equipment when delivering new ones. Often it is free or costs a symbolic amount, but you will not get money for the metal.
How much does copper weigh in a Soviet ZIL refrigerator?
In old-style ZIL models, the total weight of copper tubes and compressor windings can reach 1.5–2 kg, which is higher than in modern analogues.
Is freon dangerous when sawing a compressor?
Yes, when heated and in contact with an open flame, freon can release toxic substances (phosgene). The compressor should be sawed only after the gas has been completely released in a ventilated place.
Do they accept entire refrigerators for scrap metal?
Yes, most collection points accept entire household appliances, but pay for them at the price of ferrous scrap or mixed scrap, which is much cheaper than copper.
Is there gold in electronics refrigerator?
The control unit may contain chips with gold plating, but its quantity is negligible for independent refining and does not cover the costs.