Electric Furnace

No the element itself after it's first heating does not produce fumes. First time heating some the metals in the element may oxidize producing a fume. After which the oxidized metal creates a protective barrier by design. It will though produce fumes as it burns off contaminates in the air which come in contact with the element. The air is usually filtered to do this. So the amount of fumes is so minimal that the furnace does not need to be vented.

I would like to think that if his supplier was installing a furnace as you linked to. He would protect his butt by installing a vent. Never know what someone will put in it.

There's a good chance that we'll never know what kind of furnace the OP is talking about.

It sounds like industrial, but who knows?

Industrial electric furnaces do need external venting. I've worked on them for the last 40 years.

I'm still coughing up lumps even though I retired four years ago.

Size and what the furnace will be heating will be the critical factors to say if an electric furnace will need a vent. An electric dental furnace for making crowns will probably not need a vent. A furnace for smelting ore will surely need a vent, regardless of how it gets hot.

Any furnace that is indoors needs to be vented!

Anything that is baked in a furnace will give off fumes.

I fondly remember the smell of Grandma's gingerbread cookies drifting through the house at Christmas

Sandeep

No fumes with electric Furnace. If fumes come out it is from burning of the thing you put in the furnace.

The OP has not said what kind of furnace it is, nor what he's heating in the furnace, nor how big it is. We have small heat-treat furnaces that are roughly 20cm on a side (inside dimensions, that we don't bother to vent, but all our larger furnaces are vented.

Burning may not be the correct word. For example, braze powder is commonly held in position by an adhesive prior to vacuum brazing. That adhesive must be vaporized and evacuated before the true brazing process can begin, but if done properly, there is nothing burning.

You have taken word "Burning" literally. It was meant in philosophical manner to indicate fumes due to high heat. However, if, small electric furnace is used to heat treat the brazed part, and, if the adhesive is not removed completely then fumes will appear from burning adhesive. However, since you have planned your operation very carefully and, thus, there won't be any fumes. However to have a safe working condition, a vent could be useful in preventing fumes if, it occurs. Just a suggestion.

Well, duh!

It all depends on what you are heating in it and if there is any chemical reaction taking place. This includes firing clay, melting pure metals, etc.

The steel industry uses huge electric arc furnaces and even greater huge fume exhaust ventilation systems.

Electric furnace, yes Fume exhausts. yes

Good Luck, Old Salt

Dear Mr.sandeep lokhande,

The Electric Furnace produces heat purely by RESISTANCE Element or Induction Element and radiates the heat. Hence NO FUMES will be released.

But if the material to be heated in the Furnace, has some traces of oil or grease (while machining at the Work Shop) definitely it will be ignited or burnt - leading to emission of fumes. If no fume is desired, it should be cleaned so as to remove the traces of oil or grease.

This fume is to be vented out, since it may interact with the Heat Treatment Process and may cause hindrance to achieve the desired property of Heat Treatment.

DHAYANANDHAN.S

Remember you are working with electricity and whether furnace is made by resistance or high/low frequency induction, occasionally you get short circuited and temp shoots up causing some partial melting of refractory as well as whatever you have in the furnace at that time, and thus, fumes develop. I have seen resistance furnaces go kaput and fumes all over. Thus from Safety and Health reason you should have vent. Possibly State Safety and Health could book you for violation of Act. It is a good practice to have vent but you are the one working with it and you know better. All the best.

Normally this term is used here for melting of scrap steel in mini steel plant industries. I hope OP meant for such application. We have such mini steel plants here in India.

So none of your dentists make porcelain crowns and implants? There are many more of these furnaces than any steel recycling plants. I guess India has no annealing or doping furnaces for your semiconductor industry.

The bottom line here is that we have another post and then run question here. The OP thinks they know more about a product than the manufacturer/salesman of this product. However, the OP cannot describe the product in enough detail so we can explain who knows more.

Have a good day, everyone.

sort of true..assumming you only run clean air across the heater elements and the system has been online recently (to burn off dust that settled during prolonged periods offline)

if you run dirty air across the elements when they are energized, yes you'll get the potential for fumes. animal hair(including human) dander, etc will easily burn when airborne in your incoming air stream so keep the filtration up to speed before running the system. but as a rule you will not have a "vent" that emits fumes like you will with a gas, oil or coal fired furnace.

Lots of good answers and guesses above, but we really need to know what you are heating and the temperature as this will effect the answer.

Please provide more information.

I don't know which furnace are you referring to? If this is an electric arc furnace (EAF), the purpose of the furnace will be to melt steel scraps or produce steel by refining molten pig iron/ direct reduction iron (DRI) and charging additives depending upon the quality of the steel to be produced. The lid of the furnace has holes through which electrodes are lowered into the furnace. An electric current is passed through the electrodes to form an arc. The heat generated by this arc melts the scrap and heats the molten metal and oxygen is added through lance for the required chemical reaction.

In such furnaces off-gas evacuation systems are installed so that the furnace operators can operate in pollution free environment and could better see what is happening in and around the furnace. In EAF steelmaking the fume extraction port is provided at the top, by the side of the holes for electrodes. It is important to maintain sufficient draft on the furnace for the following reasons:

1. To provide adequate pollution control.
2. To improve visibility for the crane operator to charge the furnace.
3. To prevent damage of hoses, cables, the electrode holder etc. due to xcessive emissions around the electrode ports.
4. Excessive emissions of carbon monoxide to the secondary emission system may result in explosions in the ductwork downstream.
5. Excessive dust build-up may cause arcing between electrode phases.