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Who We Are

We committed to excellence for several decades.

Proash Industries LLP has been committed to excellence for several decades. Our process involves calcining rice husk, which is a by-product of agriculture and is generated in rice mills. We can regulate the amount of residual carbon by adjusting the oxygen levels during the burning process according to the user's specifications. Over time, we have diversified our product offerings by utilizing a combination of advanced technology and skilled labour.


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Why Choose Us

Web Development

No coding skills required to customize and create unique looks.

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Testing & Support

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Highly expertise

Experience quality of our products

Our primary strength lies in the consistency and quality of our products. Our dedicated sourcing team meticulously inspects all raw materials procured for processing to ensure they meet the necessary specifications. Throughout the production process, we conduct continuous quality checks to guarantee the uniformity of the final product.


Feedback from our clients


Get to know more about your confusion!

Are there possibilities of jamming of stopper rods or thermal probes during the use of RHAN?

By virtue of product design, RHAN is always promoted as a self-leveler and spreader. Therefore it cannot create a heap near the continuously moving parts which are going in and coming out of liquid steel. However, the possibility of such jamming cannot be ruled out. Experience in many steel plants usage has shown that as long as excessive slag ingress in the tundish is restricted, there is no problem of jamming. Still, during initial phases of trials, care should be taken to monitor such sensitive areas.

What is the consumption of Nodules (RHAN)?

Generally, as a thumb rule, between 0.10 kg to 0.24 kg per ton of liquid steel. However, it depends also on the extent of sequence casts and ladle and tundish configurations. General experience from many steel plants show that RHAN consumption is nearly 50% lower than conventional covering compounds like rice husk ash powder.

Does RHAN need to be distributed at various locations in the tundish?

No. Due to its self-spreading characteristics, RHAN can be added near the turbulent zone (liquid steel entry zone) and it will spread by itself within a few seconds. However, in case a baffle (dams and weirs) is used in the tundish, obviously RHAN needs to be added on both sides of the baffle. Moreover, in case any other additive like synthetic slag, etc are added in the tundish, then for effective results RHAN should be added in 3 or 4 segments of the tundish, viz, stopper area, shroud area, thermal probe area, etc.

Does argon bubbling in the tundish interfere with the RHAN performance?

Generally, argon flushing in the tundish to prevent air ingress is fairly soft (less than 0.8 bar pressure), so this does not create any significant turbulence or directional metal flow. But in case of excessive argon bubbling there will be turbulent metal flow away from the ladle shroud. This will tend to push the RHAN away from the shroud area due to its free-flowing nature, thus exposing the tundish metal to “red eye” phenomena.

Does RHAN addition lead to C pick-up in liquid steel?

No. There is no free C available in RHAN except the organic binder. Carbon is generated during calcinations of rice husk which is easily oxidized at high temperature to carbon monoxide (CO) and carbon di-oxide (CO2). These gases mostly fill the internal pores and external voids and must escape to the atmosphere. However, as per customers’ choice, various carbon containing grades of RHAN are available, starting from 24% C down to as low as 1.5% C.

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