With the help of Google.
PCBs (poly chlorinated biphenyl) were in older fluorescent lighting fixtures, electrical appliances containing PCB capacitors, old microscope oil, and hydraulic fluids.
These are also in older transformers in oil filled type (usually larger high voltage can or tank type, these in a fire are extremely deadly, they have been phased out but older equipment you still rum into them.
These PCBs (poly chlorinated biphenyl) are not the same as PCBs (printed circuit boards), although you could form these HCl poly chlorinated biphenyl compounds from burning circuit boards and electronic waste, as well as a whole lot of other toxic compounds.
Printed circuit boards (PCBs) are epoxy resins in fiberglass in epoxy resins, Teflon, phenolic cotton papers, many different types of metals
FR-4 is by far the most common material used today. The board with copper on it is called "copper-clad laminate".
Copper foil thickness can be specified in ounces per square foot or micrometers. One ounce per square foot is 1.344 mils or 34 micrometers.
Usually coated in benzimidazolethiol, prevent surface oxidation of bare copper.
Solder was a tin and lead, newer solder compounds used today comply with the ROHS restricts but does not eliminate the use of lead. One type of lead-free compounds is 99.3% tin, 0.7% copper, 0.05% nickel, traces of germanium.
Silver can be used but manufacturer’s will scrimp every penny they can when making millions of circuit boards or components, and still trying to compete and make a profit these penny’s add up to a lot of money.
Plating’s used organic surface protect-ant, immersion silver, immersion tin, electro less nickel, with immersion gold coating, and direct gold plate on nickel over copper or kovar. Tin forms and other metals form metallic’s such as Cu5Sn6 and Ag3Cu that dissolve into the Tin as well as lead can dissolve gold at soldering temperature.
Electronic scrap components contain contaminants such as lead, cadmium, beryllium, brominated flame retardants, Some computer components can be reused in assembling new computer products, while others are reduced to metals that can be reused in applications as varied as construction, flatware, and jewelry. Epoxy resins, fiberglass, PCBs, PVC (polyvinyl chlorides), thermosetting plastics, lead, tin, copper, silicon, beryllium, carbon, iron and aluminum.
You can also have amounts of cadmium, mercury, and thallium.
Trace amounts include americium, antimony, arsenic, barium, bismuth, boron, cobalt, europium, gallium, germanium, gold, indium, lithium, manganese, nickel, niobium, palladium, platinum, rhodium, ruthenium, selenium, silver, tantalum, terbium, thorium, titanium, vanadium, and yttrium.
Almost all electronics contain lead and tin (as solder) and copper.
Americium the radioactive source in smoke alarms, carcinogen.
Mercury, switch’s fluorescent tubes flat screen monitors, sensory impairment, dermatitis, memory loss, muscle weakness, mental problems, nerve problems.
Sulfur and compounds in batteries, liver damage, kidney damage, heart damage, eye and throat troubles, and in lungs gases can create sulfuric acids.
Chloride gases can also form acid in the lungs.
Flame retardants found in plastics of most electronics. Health effects include impaired development of the nervous system, thyroid problems, and liver problems.
Cadmium, Found in light-sensitive resistors, corrosion-resistant alloys for marine and aviation environments, and nickel cadmium battery. The inhalation of cadmium can cause severe damage to the lungs and is also known to cause kidney damage.
Lead solder, toxic lead fumes---- toxic to many organs and tissues including the heart, bones, intestines, kidneys, and reproductive and nervous system. lead is especially toxic to children. Symptoms include abdominal pain, confusion, headache, anemia, irritability, and in severe cases seizures, coma, and death.
Beryllium oxides in heat sink greases, carcinogen and may cause chronic beryllium disease.
After burners are like a furnace in your flue, they re-burn the gases that did not burn in your furnace the first time, the fumes even after the after burner would need to be run through a scrubber and filters, not something most people could build at home in their back yard. And even if they did, have you discussed your plans with your local EPA officer and the department of environmental quality, the may require you to have permits and inspections if they did not just put you in hand cuffs just for thinking about doing what your planning to.
I suggest you think twice, and look carefully what is below this bridge, you are thinking about jumping off of, you could find it a hard landing if you did not kill yourself or others first.
My advice leave burning of electronic waste to the large refinery, sell your scrap to them and buy refined gold and retire a healthy man, not some unhealthy poor old cripple burning scrap to pay for his hospital bills.
