Q:Which crucibles are available for melting sodium hydroxide?

Graphite crucibles and metal crucibles can be usedA porcelain crucible can not be used because of its silicate content, which reacts with NaOH and damages it.

Q:What are the welding methods at the end of the thermocouple?

Argon arc welding type K thermocouple argon arc welding equipment consists of 5 parts, such as DC welding power supply, high frequency oscillator, welding gun, welding power supply and clamp. When welding, the cerium tungsten wire extending out of the welding nozzle is used as the negative electrode, and the welding thermocouple is fixed on the fixture as an anode. When the poles by high frequency and high voltage when the arc ignition function, using thyristor voltage control, arc intensity, under the protection of argon to cerium tungsten and generating arc discharge between welding thermocouple, high temperature generated by the arc melting end of the thermocouple wire into a ball. In order to facilitate the alignment of the thermocouple with the electrode, the work fixture and the welding torch can move in both horizontal and vertical directions. The welding torch is equipped with cerium tungsten electrode of diameter 1mm and 1.5mm, which is used for welding thermocouples of different diameters.

Q:Cast iron into a casting. What is the state of the matter, change, sublimation?

The graphite crucible has good thermal conductivity and high temperature resistance, and the thermal expansion coefficient is small in the process of high temperature use, and has a certain anti strain property for hot and cold quenching. The corrosion resistance of acid and alkaline solution is strong, and it has good chemical stability.

Q:The difference between the graphite rod and graphite electrode, graphite and blank refers to what

Graphite rod refers to graphite rod without processing. A graphite electrode refers to a finished product.

Q:Can a graphite crucible be used for iron casting?

No, a graphite crucible is not suitable for iron casting. Iron casting requires a crucible made of materials that can withstand the high temperatures and chemical reactions involved, such as clay or silicon carbide. Graphite crucibles are better suited for non-ferrous metal casting due to their lower melting points and reactivity with iron.

Q:Can magnesia crucible be melted into stainless steel?

In the smelting of titanium alloy, because there are a lot of active element Ti in the alloy, it is easy to react with C, N, O and other elements, resulting in the change of alloy composition

Q:What are the different methods of sealing a graphite crucible?

There are several methods of sealing a graphite crucible, including the use of high temperature adhesives, clay or ceramic seals, welding, or the use of metal flanges and bolts. Each method has its advantages and disadvantages, and the choice of sealing method depends on factors such as the temperature and pressure requirements, the materials being processed, and the desired level of integrity and durability.

Q:Aluminum crucibles can be used to heating soda?

The reaction of alumina and sodium carbonate will generate high temperature, sodium aluminate and carbon dioxide. If you want to heat up sodium carbonate, you can use graphite crucibles and glass

Q:Melting the iron in the graphite crucible. Does the graphite in the crucible turn into carbon and it melts into the steel?

Graphite is a very pure substance, and graphite is a transition crystal. The carbon atoms in each layer of graphite are bonded by non-polar covalent bonds, and the molecular layers of graphite are joined by intermolecular forces. The melting point of the graphite crucible is 3652 to 3697 degrees (sublimation), so the graphite crucible is high temperature resistant.

Q:What are the common sizes available for graphite crucibles?

The common sizes available for graphite crucibles range from small ones that can hold a few grams of material to larger ones that can hold several kilograms.