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What else can I help you with?
What is the benefit of using boron oxide over boric acid in lining of induction furnace?
As per my knowledge Boric acid dissociates into Boron oxide by escape of water molecules from boric acid near to 300 deg centrigrade; hence bonding may be weakened. But in case of Boron oxide use, there is no dissociation of Boron oxide.
Which is the best lining for Hydrochloric acid valves?
Neoprene or teflon lining is the most suitable for hydrochloric acid.
When should you replace your CPO if it becomes wet through the inner lining with any of these materials such as petroleum oil?
You should replace your CPO (Chemical Protective Outerwear) if it becomes wet through the inner lining with petroleum oil or any hazardous substance. Exposure can compromise its protective capabilities, potentially allowing harmful chemicals to penetrate. Additionally, if the outer material shows signs of damage or degradation, it is crucial to replace it to ensure ongoing safety. Regular inspections will help determine when replacement is necessary.
What is glass lined reactor?
A glass-lined reactor is a type of chemical reactor that features an inner lining made of glass, typically fused to a metal substrate, to provide excellent chemical resistance and prevent contamination. This design is particularly useful for processes involving corrosive substances, as the glass lining protects the underlying metal from chemical attack. Glass-lined reactors are commonly used in industries such as pharmaceuticals, chemicals, and food processing, where purity and safety are paramount. They also offer easy cleaning and maintenance due to their smooth, non-porous surfaces.
Should you teflon lined butterfly valves use gaskets?
Teflon-lined butterfly valves typically do not require gaskets because the Teflon lining provides a good sealing surface. However, depending on the application and the specific design of the valve, gaskets may still be used to enhance sealing or accommodate any irregularities in the flanges. It's important to consult the manufacturer's guidelines for the specific valve in question to determine if gaskets are necessary. Always consider the operating conditions and media when making this decision.
What is Function of refractory lining in the furnace?
tell me funtion of tube types of furnace
How do you calculate refractory wear index in electric arc furnace?
The refractory wear index in an electric arc furnace (EAF) is calculated by measuring the thickness loss of the refractory lining over a specific time period. This involves taking initial and final measurements of the refractory lining's thickness and calculating the difference. The wear index can also be expressed as a ratio of the volume of refractory material lost to the total volume of the refractory lining, often normalized by the duration of the operation. This index helps in assessing the performance and longevity of the refractory materials used in the EAF.
How do you lay the refractory brick of furnace working lining?
To lay the refractory brick of a furnace working lining, first prepare the foundation by ensuring it's clean and level. Use a suitable mortar or adhesive specifically designed for refractory materials to bond the bricks, applying it evenly. Begin laying the bricks from the corners and edges, ensuring proper alignment and staggering the joints to enhance structural integrity. Finally, allow the mortar to cure as per the manufacturer's instructions before subjecting the lining to heat.
Magnesium oxide as a refractory lining material?
Magnesium oxide is used to make linings for some furnaces. It is known as a refractory material - which just means that it is resistant to heat.Magnesium oxide has a high melting point (2852°C) and so resists the high temperatures in a furnace. Its melting point is high because of the strong ionic bonds between the small Mg2+ and O2- ions.
What is freeze-lining of a furance in smelting area?
Freeze-lining refers to the accumulation of solidified material, such as slag or metal oxides, on the refractory lining inside a furnace in the smelting area. This can obstruct the flow of material and heat transfer, leading to decreased efficiency and potential damage to the furnace lining. Regular maintenance and proper operating conditions can help prevent freeze-lining issues.
Why you used carbon refractory at blast furnace?
Carbon refractories are used in blast furnaces because of their high resistance to heat and thermal shock. They can withstand the extreme temperatures and chemical reactions that occur during the iron-making process. Additionally, carbon refractories have good thermal conductivity, allowing them to efficiently transfer heat in the furnace.
What is the difference between a closed combustion furnace and open combustion furnace?
A closed combustion furnace has a sealed combustion chamber, drawing outside air for combustion and expelling combustion gases outside through a dedicated vent, resulting in higher energy efficiency and indoor air quality. An open combustion furnace draws air from inside the home for combustion and expels gases through a chimney, potentially leading to energy loss and indoor air quality issues.
What is black sand mining?
Black sand beaches and deposits are common in all of the trans-Pacific countries with volcanoes. The sand is black because of the iron component, derived from the volcano, and this is a trade-able commodity used in steel making. Black sand is mined in New Zealand and sent to Japan for steel-making, but not just for the iron component. The sand also contains titanium as a contaminant and this makes the steel-melt in the furnace somewhat sticky - normally a disadvantage. But this stickier component adheres to the ceramic lining of the blast furnace, and thus prolongs the life of the furnace lining. Steel furnaces require re-lining at intervals, but this is an expensive process, as the furnace has to be pulled out of commission, and allowed to cool before the refractory lining can be replaced. Thus the titanium contaminant is an economic advantage.
What is a foundry ladle made of?
Foundry ladles usually comprise of a mild steel shell with a refractory lining material. Effectively it is the refractory lining material that allows the foundry ladle to be used with molten metal whilst the steel shell provides support for the refractory. Traditionally the refractory material used to be firebrick, fireclay or even rammed sand. However it is more common for foundries to now use special refractory concretes that have high insulation values and last longer. Examples can be seen at www.acetarc.co.uk Where small amounts of metal are to be cast foundries will sometimes use ceramic crucibles to hold the metal.
How to check Lining in an oil furnace combustion chamber?
Unbolt the burner and slide it out of the way.
What is the significance of tracking the use of wet injection in blast furnace linings?
As a technical researcher who has worked in China's Speed Steel supply chain for 8 years, he is relatively familiar with this technology. The blast furnace lining wet injection technology can complete a 5500m³ blast furnace lining repair in a very short time (48h). And the service life can reach more than 1.5 years. This rapid maintenance mode has been fully recognized by most blast furnace users and plays a huge role in China's green ironmaking technology. The core of wet injection technology is "injection" rather than "spray". "Injection" means pouring without mold, and the effect of pouring is achieved by spraying. At present, the market is flooded with various wet spraying technologies and products, most of which are the dry spraying model, and the work is completed by spraying the material on the inner wall. In fact, concrete spraying technology has been developed in the construction industry for more than 100 years, and the spraying of unshaped refractory castables is not more complicated than building materials. It's easy to "spray out and stick to the wall" material, but it goes against the idea of wet injection of blast furnace linings. For the non-slab wall combined with the blast furnace cooling stave, the inner lining basically fell off during the middle repair, and there are still residual materials in the brick-inlaid groove of the cooling stave. Even if the smooth metal lining is not repaired, it can still keep going straight after the furnace is opened. The success of injection lining of a blast furnace is not simply to observe whether the blast furnace runs straight after opening, nor whether the surface is smooth or not after injection lining, but the actual data reflected after opening the furnace. The role of the blast furnace lining is to protect the cooling stave, and it is also the key to preventing excessive energy loss in the blast furnace. Under normal circumstances, the coke ratio and the comprehensive fuel ratio of the blast furnace will drop significantly after the injection lining is opened. Based on a large amount of practical experience, this reduction rate is about 15% to 18%; and the judgment of the life of the injection lining can also be inferred from these data. In order to achieve the effect of wet injection, a uniform stirring material and a stable pumping speed are required. The distance and angle between the gun head and the wall surface, the feeding amount, the feeding speed, the gas feeding amount and the coagulation accelerator amount, etc., the output will be stable when the injection material has the characteristics of the casting body. In the actual implementation process, the operator needs to be flexibly adjusted, so the early business training is very important. A good spray interface is not as smooth as a plastered surface, but rough and the particles are clearly visible. The steps of wet spraying can only be done from bottom to top like pouring, and cannot be sprayed piece by piece. Furnace shape, not longevity. The energy saving and consumption reduction of blast furnace is not simply to choose low-cost refractory materials. The development direction of wet injection technology is still more efficient, energy saving and longevity. Only by respecting research and development, technology, and market, rather than blindly imitating, can we promote the progress of core technology and obtain good market applications. Even if the smooth metal lining is not repaired, it can still keep going straight after the furnace is opened. The success of a blast furnace injection lining.
Why is silicon dioxide a suitable material for lining furnaces?
Silicon dioxide is suitable for lining furnaces because of its very high melting point of 1,600 to 1,725 degrees celcius. It is so high because of the strong intermolecular forces between SiO2 molecules in the giant covalent structure comparable to that of diamond and graphite. A large amount of energy is required to overcome these intermolecular forces and thus SiO2 has a high melting point. Note: no silicon-oxygen bonds are broken during melting, just intermolecular forces between SiO2 molecules.
