New Launches

parboiling and dryer rice milling machine

Parboiling & Dryer

Milltec offers an unique equipment for the process of parboiling called the Gelatinization device.

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Pneumatic Sheller

Milltec introduces advanced dehusker which is fully controlled by PLC Complete.

Rice Whitener - Rice Milling Solutions

Rice Whitener

The rice whitener incorporates advanced techniques for whitening of brown rice.

MV 7000 Color Sorter

MV7000 Series Color Sorter has auto intelligent digital image sorting technology.

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Silica from Rice Husk Ash (RHA)

MILLTEC, as one of the market leaders, strives for continuous improvement- to serve customers better and to provide good value for their money. Disposal of rice husk is one of the major challenges faced by millers all over India. India produces around 25 million tons of rice husk every year. This rice husk ash when burnt in the boiler as fuel, generates ash known as rice husk ash (RHA). RHA is a great environmental threat but on a positive note, RHA contains 60% to 80% amorphous silica which has application in various industries.

Silica from Rice Husk Ash

As an expansion and diversification strategy, MILLTEC has introduced a high-efficiency precipitated silica extraction technology from rice husk ash. The equipment for the extraction plants are indigenously designed at MILLTEC. Silica is extracted based on batch processing, and MILLTEC offers millers batch processing plants of 2 tons per day silica extraction capacity. Along with silica, there are other by-products like carbon and sodium carbonate from RHA that are useful in various industries. This product is currently in its pilot phase.

Benefits of Precipitated silica from rice husk ash

  • Precipitated silica from rice husk ash is from a bio source and is non-toxic.
  • Precipitated silica is extracted from waste hence nullifying the raw material cost.
  • Any industry that uses rice husk as fuel for cogeneration can benefit from this technology.

Utilization of rice husk

Rice husk can be combusted in a boiler to generate steam for cogeneration and process requirement. The ash generated can be stored for silica extraction. The steam generated is utilised in a steam turbine which generates electricity. Electricity generated is consumed for mill requirements.

Data on Rice husk :

  • One ton of paddy milled generates 200 kg of husk
  • 200 kg of husk give 50 kg of ash
  • The ash contains 60~80% Silica (i.e.) 40 kg silica per ton of paddy

Uses of Precipitated silica in products :

  • Rubber reinforcement (Tyre industry)
  • Plastic reinforcement
  • Agriculture (Animal food)
  • Food, Healthcare, Cosmetics
  • Catalyst; Coatings
  • Pulp and Paper processing

Process Flow Diagram :

silica