What is the function of tap hole in a cupola furnace?

Slightly above the bottom and in the front there are a tap hole to allow molten cast iron to be collected. (ix) Slag Hole: There is also a slag hole located at the rear and above the level of the tap hole because slag floats on the surface of molten cast iron.

What is tap hole in blast furnace?

For a slag and hot metal to be prevented from interfering with blast furnace operation, a tap hole is needed. The tap hole located slightly above the floor of the hearth of the furnace is used for tapping slag and hot metal from the furnace.

What is the function of the iron tap hole in the production of iron?

The tap hole also known as iron notch, is used for tapping the hot metal from the furnace. It is located slightly above the floor of the hearth.

What is tap hole drilling?

Drilling and tapping are two different actions. Drilling refers to creating a smooth hole in a material with a drill and motor. Tapping is the action that creates a thread into the side of the hole. A variety of taps are available to match almost any screw type available, including metric and standard measurements.

What kind of material is a tap hole made of?

Accordingly, commercial tap hole mass contains alumina–silica refractory around 65–85% rest being carbonious material. Commercial formulation uses pitch anywhere between 1% and 30%. Tap hole mass are generally used for small and medium blast furnace and they contain no tar.

What do you need to know about tap hole clay?

The tap hole clay must consistently and safely perform the following: • Flow when pushed by the clay gun, to plug the tap hole. • Cure within the tap hole during the plug to tap time but without shrinkage to ensure a tight seal • Be drilled in an acceptable time.

What kind of pitch is used in tap hole?

Commercial formulation uses pitch anywhere between 1% and 30%. Tap hole mass are generally used for small and medium blast furnace and they contain no tar. Formulations in medium size furnaces (capacity) around 6000 ton/day mainly use alumina and some silicon carbide as aggregates and resins as binder.

How to develop tap hole clay for blast furnace?

3.4.2 Optimization of resin ratio for the developing tap hole clay using washed tap hole clay 3.5 Batch preparation 3.6 Characterization of sintered specimen 3.6.1 Permanent linear change 3.6.2 Volatile matter 3.6.3 Apparent porosity CHAPTER 4 RESULTS AND DISCUSSION [15-26]