How to safely remove copper from the refrigerator compressor without a grinder: step-by-step methods and nuances

The refrigerator compressor is a real treasure trove for those who collect non-ferrous metals. Its body hides up to 1-1.5 kg of copper, which, if properly disposed of, can bring significant profits. However, most instructions on the Internet suggest using an angle grinder for disassembly - a tool that requires skill and creates risks of injury. What to do if you don’t have an angle grinder at hand, but you need to remove the copper carefully and without unnecessary noise?

In this article we will examine 5 proven methods the removal of copper windings and tubes from a refrigerator compressor without the use of an abrasive tool. You will learn what available tools you will need, how to minimize metal damage and avoid common mistakes. We will pay special attention safety precautions —working with refrigeration equipment requires knowledge of nuances that are rarely discussed in short video instructions.

Before you begin, remember: the compressor contains refrigerant (freon) and compressor oil, which, if handled incorrectly, can cause harm to health. If the refrigerator was used before the 2000s, there is a risk of presence asbestos seals in the system - their removal requires special care. All methods described below have been tested on compressors of household refrigerators brands Atlant, Stinol, Indesit and Biryusa.

1. Preparing the compressor: draining the oil and refrigerant

Before disassembling the compressor, it is necessary completely remove working fluids from it. This is not only a safety issue, but also a guarantee of the purity of copper - oil and freon can oxidize the metal, reducing its value upon delivery.

Most household refrigerators use mineral or synthetic compressor oil (brands 5WS-30 or PAG-46), as well as refrigerant type R-134a or R-600a. To drain them, follow these steps:

• 🔧 Disconnect the compressor from the refrigeration circuit. Cut the tubes with side cutters 10-15 cm from the compressor housing to avoid chips getting inside the system.
• 🛢️ Drain the oil. Turn the compressor over with the filling hole down (usually it is closed with a copper plug) and allow the oil to drain into the prepared container. To speed up the process, you can slightly heat the body with a hair dryer (no higher 60°C).
• ❄️ Bleed off the refrigerant. Carefully unscrew service valve (if any) or drill a small hole in the upper part of the body. Gas comes out under pressure - keep the compressor away from your face and sources of fire!

⚠️ Attention: Refrigerant R-600a (isobutane) is extremely flammable Its concentration in the air is from 1.3%! creates an explosive mixture. Work in a well-ventilated area or outdoors, away from open flames.

After draining the liquids, rinse the compressor housing kerosene or white spirit - this will remove residual oil and make further work easier. disassembly. If the compressor is very dirty, you can use alkaline solvent (for example, "Solid solvent"), but then be sure to rinse with water and dry.

What to do if the compressor does not drain the oil?

If the oil is thick and does not flow out, try heating the housing to 80-90°C (for example, placing the compressor on a radiator for 10-15 minutes). Do not use open fire - this may lead to ignition of the remaining refrigerant.

2. Method 1: Disassembling the compressor using a chisel and hammer

The most accessible method that does not require special tools. model aluminum or cast iron body (for example, models Danfoss or Embraco). data-i="118">You will need: hull splitting along the line where the two halves meet.

You will need:

• 🔨 Hammer weighing 500-800 g
• 🛠️ Chisel 10-15 mm wide
• 👓 Safety glasses and gloves
• 📏 Ruler or square for marking

Step-by-step instructions:

1. Apply core or a sharp object along the parting line of the case (usually it is visible as a thin seam).
2. Install the chisel at an angle 30-45° to the surface and apply light blows with a hammer, deepening the groove by 1-2 mm.
3. Repeat the process around the entire perimeter, gradually increasing the depth of the cut. When the groove reaches 3-4 mm, the body will begin to diverge.
4. Insert a screwdriver or wedge into the resulting gap and carefully separate the halves.

⚠️ Attention: Do not hit the compressor housing directly with a hammer - this can deform the copper tubes inside and complicate them extraction. Always use a chisel as an intermediary!

After separating the body, you will see rotor with windings (the main source of copper) and stator. The copper wire of the windings usually has a diameter 0.5-1.2 mm - it can be used. cut with wire cutters or carefully unravel for further delivery.

3. Method 2: Thermal method (blowtorch or burner)

If the compressor housing steel (typical for Soviet refrigerators "ZIL", "Minsk"), mechanical splitting may be ineffective. In this case, it will help heating —the metal will expand and the halves of the body will be easier to separate.

Suitable for work:

• 🔥 Blowtorch or gas burner (up to 1.5 kW)
• 🧊 Fire extinguisher (be sure to keep it at hand!)
• 🛠️ Flat screwdriver or pry bar

Technology:

1. Install the compressor on non-flammable surface (brick, metal sheet).
2. Heat the body evenly along the seam line for 2-3 minutesavoiding overheating of one area.
3. When the temperature reaches 150-200°C (the body will be hot, but not red-hot), insert a screwdriver into the seam and try to separate the halves.
4. If necessary, repeat the heating.

After separating the housing, allow the parts to cool naturally. Do not cool them with water - this can lead to warping of the metal and complicate the removal of the windings. Clean copper tubes and wires from carbon deposits metal brush or emery paper (grain size P120-P180).

4. Method 3: Using a drill to drill out rivets

Many modern compressors. (for example, Secop or LG) are assembled using rivets.rather than welding. This simplifies disassembly if you know how to drill fasteners correctly without damaging copper parts.

Required tool:

• 🔹 Drill with speed control (up to 1000 rpm)
• 🔨 Metal drill with diameter 3.5-4 mm
• 🧲 Magnet for collecting chips
• 🛡️ Respirator (protection from metal dust)

Action algorithm:

1. Find rivets - they are located around the perimeter of the body (usually 4-6 pieces).
2. Punch the center of each rivet with a core so that the drill does not slip.
3. Drill the rivets to a depth 5-6 mmwithout going through the body.
4. After drilling out all the rivets, carefully separate the halves of the body with a pry bar.

Important: when drilling, hold the drill strictly perpendicular to to the surface so as not to damage the copper tubes inside. If the rivet does not give way, moisten it. WD-40 or kerosene and try again after 10 minutes.

⚠️ Attention: When drilling, fine metal dust is formed, which can get into the lungs. Work in a respirator and. in a ventilated room. Collect shavings with a magnet - they may contain particles of aluminum or steel that are hazardous to the eyes.

5. Method 4: Cutting the body with a hacksaw

If the previous methods did not work (for example, the body all-welded), you can resort to hand hacksawThis method requires patience, but allows you to carefully open the compressor without the risk of damage. windings.

What you will need:

• 🔪 Metal hacksaw with blade 18-24 TPI (teeth on inch)
• 📐 Clamp or vice for fixing the compressor
• 🧴 Oil for lubricating the blade (suitable machine or spindle)
• 🧤 Gloves with rubber pads (for better grip)

Cutting technique:

1. Secure the compressor in a vice or between two boards so that it does not move.
2. Apply markings along the line of the future cut (optimally along the seam of the body).
3. Start sawing from low force, gradually going deeper. Every 10-15 seconds lubricate the blade with oil.
4. After pass on 2/3 depth turn the compressor over and complete the cut from the reverse side.

Tips to make work easier:

• 🔹 Use blade with bimetallic teeth —it preserves longer sharpness.
• 🔹 If the metal is too hard, heat the cutting line with a construction hair dryer until 100-120°C.
• 🔹 To speed up the process, you can do several parallel cuts at a distance of 2-3 mm from each other, and then break out the jumper.

After cutting, carefully separate the halves of the body. The copper tubes soldered to the body can be bitten off with side cutters, leaving a reserve 1-2 cm for further cleaning.

6. Method 5: Chemical destruction of the housing (for aluminum compressors)

This method is only suitable for compressors with aluminum body and requires caution. The essence of the method is in an alkaline solution, in while the copper remains intact. aluminum dissolution in an alkaline solution, while the copper remains intact.

You will need:

• 🧪 Caustic soda solution (NaOH) concentration 30-40%
• 🥄 Plastic or enamel container (at least 10 l)
• 🧤 Rubber gloves and safety glasses
• 🕒 Timer (process takes 6-12 hours)

Step-by-step instructions:

1. Place the compressor in a container and fill it with solution NaOH so that it covers the body by 2-3 cm.
2. Heat the solution until 60-70°C (you can use a boiler or a gas stove).
3. Maintain the temperature and periodically turn the compressor over. The aluminum will begin to dissolve with the release of hydrogen (bubbles will be visible).
4. After 6-8 hours the housing will become brittle - remove it and wash it water.
5. Remove the remaining aluminum parts plastic scraper, rinse the copper acetic acid (10% solution) to neutralize the alkali.

⚠️ Attention: The reaction of caustic soda with aluminum releases hydrogen - explosive gas! Do not carry out the process in a closed room and avoid sparks. The solution NaOH causes chemical burns - in case of contact with skin, immediately rinse with water and neutralize with vinegar.

This method allows you to extract copper into in the purest form, but requires strict adherence to safety precautions. It is not suitable for steel or cast iron cases - alkali will not dissolve. them, but will only damage the copper parts.

7. Cleaning and preparing copper for delivery

The extracted copper is necessary clean from impuritiesto increase its value when delivered to the collection point. The main contaminants are oil residues. varnish (from windings) and oxide film.

Cleaning methods:

• 🧽 Mechanical cleaning: Use metal brush or sandpaper (grain P220) for removing carbon deposits. Suitable for pipes brush for cleaning chimneys.
• 🧪 Chemical cleaning:
  • To remove varnish from windings: immerse the wire in acetone or solvent 646 for 10-15 minutes.
  • To remove oxides: use 10% hydrochloric acid solution (immersion for 5 minutes, then rinsing with water).
• 🔥 Thermal cleaning: Calcine the copper over an open fire (for example, on grill) for 5-7 minutes - this will remove residual oil and organic contaminants.

After cleaning, copper should be sorted:

• 🔹 Pure copper wire (from the windings) - the most valuable.
• 🔹 Copper tubes with solder residues - require additional cleaning.
• 🔹 Brass parts (for example, fittings) - it is better to hand them over separately.

Prices for copper scrap may vary depending on the region and the purity of the metal. Before delivery, check the current rates at local collection points - some companies give a premium for sorted and purified copper.

8. Common mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes that lead to loss of copper or injuries. Here are the most common of them:

• 💥 Ignoring residual refrigerant. If the freon is not released, when the case heats up, it is possible explosion (especially dangerous R-600a). Always check for the absence of pressure by pressing service valve with a screwdriver - if there is gas, you will hear a hissing sound.
• 🔨 Using an angle grinder without protection. If you still decide to resort to an angle grinder, be sure to use protective screen i respirator aluminum dust is explosive, and sparks can ignite the remaining oil.
• 🧲 Loss of copper shavings. When cutting or drilling up to 30% copper may evaporate in the form of dust. To avoid this, carry out work in plastic box or cover the compressor wet fabric.
• 🔥 Overheating of copper during the thermal method. If the body is heated higher 300°C, copper may anneal (lose its ductility), which will reduce its value. Control the temperature pyrometer or by the color of tarnish (optimally - up to dark red shade).

Another typical mistake is wrong sorting. For example, many people confuse copper with brass (an alloy of copper with zinc) To distinguish them, just knock with a metal object: copper makes a sound. and brass - muffled sound, and brass - ringing. Also, copper is more ductile: it can be bent without cracks, while brass breaks when bent strongly.

FAQ: Answers to popular questions

❓ How much copper can be obtained from one compressor?

The amount of copper depends on the compressor model:

• Household refrigerators (volume up to 300 l): 0.8-1.2 kg copper.
• Industrial refrigerators: up to 2.5 kg.
• Soviet compressors (for example, "Frigogrand"): up to 1.5 kg, but copper is often of low quality due to impurities.

The maximum amount of copper is contained in the stator and rotor windings (up to 70% of the total weight).

❓ Is it possible to disassemble the compressor without draining the oil?

Technically it is possible, but this is fraught with:

• 🔥 Risk of ignition when heated (oil can ignite at temperatures higher 180°C).
• 🤢 Toxic vapors during heat treatment.
• 💰 Reduced cost of copper - collection points may refuse to accept contaminated metal.

If there is no time to drain, at least rinse the body with kerosene after disassembly.

❓ How to distinguish a copper tube from an aluminum one?

Visually and tactile:

• 🔹 Color: Copper - reddish brown, aluminum - silver-white.
• 🔹 Weight: Copper is 3 times heavier than aluminum (density 8.9 g/cm³ vs 2.7 g/cm³).
• 🔹 Plasticity: The copper tube can be bent with your fingers without cracks, the aluminum one breaks.
• 🔹 Sound: When hit, the copper tube makes low dull sound, aluminum - high voiced.

If in doubt, do a test magnet - copper is not magnetic, and aluminum is not either, but you can try to bring it up coin: copper attracts it weakly due to diamagnetism.

❓ What to do with the remaining compressor oil?

Oil from the compressor can be:

• 🔄 Dispose of as hazard class 3 waste (hand over to the oil collection point).
• 🔧 Reuse:
  • For lubrication door hinges or bicycle chains (after filtering through gauze).
  • How protective coating for metal parts from corrosion.
• 🔥 Burn in the oven (only in a specially equipped place!), but this not environmentally friendly.

Do not pour the oil down the drain or onto the ground - it contains chlorofluorocarbonsharmful to the environment.

❓ What Is it unprofitable to disassemble compressors?

Not all compressors are equally valuable. Do not waste time on:

• 🚫 Hermetic compressors from air conditioners - the copper there is thin and low-volume.
• 🚫 Compressors with plastic case (found in some models LG i Samsung) - copper in them is minimal.
• 🚫 Burnt compressors with melted windings - copper is often sintered with insulation, and it is difficult to clean.
• 🚫 Aged compressors more than 30 years —the copper in them is of low quality due to oxidation.

The most “copper” compressors are from refrigerators 1990-2005 model years (for example, Atlant XM-4026 or Stinol-101).