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Reprocessing of the Rice Hulls

#K-449


Development of Technology for Complex Processing of Annually Renewable Anthropogenic Vegetative Raw Material (Rice Hulls) with the Object of Producing Silicocarbon and Organic Product Used in Various Areas of Technology, Agriculture and Medicine

Tech Area / Field

  • MAN-MAT/Engineering Materials/Manufacturing Technology
  • BIO-CHM/Biochemistry/Biotechnology
  • AGR-OTH/Other/Agriculture

Status
8 Project completed

Registration date
27.12.1999

Completion date
20.11.2003

Senior Project Manager
Zalouzhny A A

Leading Institute
The National Center for Mineral Raw Materials Complex Processing, Kazakstan, Almaty

Supporting institutes

  • Machine Building Plant, Kazakstan, Almaty

Collaborators

  • Center for Advanced Mineral & Metallurgical Processing, USA, MT, Butte

Project summary

The objectives of this Project are to develop and test the technology and equipment for producing from the rice hulls RH) the multinational materials: silicocarbon (SC) and organic product OP), to lay down the basis for setting up their industrial production, and to solve certain ecological and social problems.

Every year about 50 thous. tons of the RH are produced at the rice processing plants in Kazakhstan. These rice hulls are, primarily, removed to the dumps where gaseous toxic substances are emitted because of the RH decomposition in the ambient air generating by this great ecological problems in these regions.

At the same time, as the results of the laboratory research demonstrated, after appropriate RH processing it is possible to receive valuable products: silicocarbon and organic product. The SC represents the homogeneous mixture of amorphous highly active carbon (~50% by weight) and silica (~45% by weight), and it may be applied as a fodder admixture, sorbent, filling agent for industrial rubber articles and carbonic products, and also as the primary raw material for producing polycrystalline silicon and other silicon containing compounds.

The OP represents a condensed mixture of phenols, organic acids, spirits and neutral fraction. This OP has a well-defined antimicrobial activity, and it may be used as bactericidal preparation in agriculture and medicine, as well as the primary raw material for producing organic acids, tanning agents, synthetic rubber polymerization inhibitor and petrol antioxidant, etc.

In developing and implementing the Project there participate 4 Doctors of Science, 6 Candidates of Science and 15 highly qualified engineers and designers, specialists in the fields of biochemistry, metallurgy, development of advanced materials and technology.

This Project provides for:


a) study of physical and chemical properties of the SC and OP produced in the process of the rice hulls pyrolysis under conditions of reduced pressure at various temperatures with the aim to work out the technology and to select the trend of the researches on investigating the most optimal conditions and producing the pilot batch of products;
b) the designing and technological studies on establishment of a pilot plant for producing the SC and OP with the output of 30 – 50 tons and 10 – 15 tons per year respectively; this plant’s construction and mounting at the pilot site; finishing the technology off under the optimal conditions and producing the pilot batch of the products;
c) testing of the SC and OP direct application in the most optimal areas of industry and agriculture and determining of certain ways for their processing in order to produce perse technological materials and biochemical products;
d) study of proposals for setting up the industrial production of the SC and OP, and their application in perse areas of the economy.

First, the work on the project within the course of three years will employ scientists and specialists engaged in the field of chemical and bacteriological defense and in the area of developing rocket technology, and, secondly, after the project completion it will make it able to engage considerably greater number of the specified specialists in designing and manufacturing equipment, technology development and organization of advanced materials’ industrial production, and at investigating new areas of applying the products produced.

Implementation of the Project will make it possible to create the basis for industrial production of new advanced materials from the anthropogenic raw material and to solve important ecological and social problems including creation of several hundreds of new jobs in labor-excessive regions.


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