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Aluminosilicate Ores and Aluminum Industry’s Wastes

#T-1158


Complex Processing of Aluminosilicate Ores and Aluminum Industry’s Wastes

Tech Area / Field

  • CHE-IND/Industrial Chemistry and Chemical Process Engineering/Chemistry

Status
3 Approved without Funding

Registration date
26.05.2004

Leading Institute
Institute of Chemistry named after V.I.Nikitin, Academy of Sciences, Republic of Tajikistan, Tajikistan, Dushanbe

Supporting institutes

  • Tajik State National University, Tajikistan, Dushanbe

Collaborators

  • National Center for Atmospheric Research, USA, CO, Boulder

Project summary

The aim of the project is to develop principal technological schemes for reprocessing of nephelinic syenites, kaolin clays, kaolin clays, siallits and aluminum production’s wastes.

On the territory of the Republic of Tajikistan there are resources of aluminum-containing ores (nephelinic syenites, kaolin clays, siallits, zeolites), but they differ with low content of alumina (20-22%). Creation of alumina production in the Republic of Tajikistan is complicated by two problems:

1. Republic of Tajikistan does not have considerable resources of high-quality alumina ores, processing of which could ensure the most part of needs of aluminum plant (about 1 millions of tons per year);


2. Today processing of available hard-to-reach, low-quality, hard-to-strike aluminum-containing ores is not expedient from economic and ecological point of view as during complex processing of these ores we get a considerable amount of accompanying products and wastes, which are not in great demand in the region and pollute the environment.

There are no projects on complex processing of local aluminum-containing ores, including nephelinic syenites, kaolin clays and etc., which may be used to get alumina, coagulants and other valuable products.

Except, the Republic owns one of the largest NIS aluminum plants – Tajik Aluminum Plant (TALP), which industrial wastes contain a lot of useful components.

The project is directed on creation of conditions for re-orientation of scientists, which are involved in the development of materials of for military industry and their involvement to solving problems, connected with development of the processing technologies for mineral ores and industrial wastes.

In order to implement the set tasks it is planned to solve the following problems:

1. Mineralogical and chemical tasks, connected with investigation of phase, mineral, chemical and physico-chemical composition and properties of aluminum-containing ores и aluminum production’s wastes before and after processes of their chemical and thermal treatment by methods of physico-chemical analysis;


2. Kinetico-chemical tasks, connected with investigation of chemical activity of nephelinic syenites, kaolin clays, siallits, zeolites, alunites и aluminum production’s wastes in dependence from temperature, composition, concentration, dispersibility and other factors during chlorine, acid, and thermal treatment;
3. Experimental-industrial and technological tasks, connected with determination of optimal kinetic and thermodynamic parameters of processes for determination of material and thermal balance, selection and substantiation of equipment and devices for carrying out experimental-industrial tests of the developed principal technological schemes of complex processing of high-silicon ores and industrial wastes.

We shall have regular information exchange with collaborator about work progress, will be jointly used special equipment; will be provided for tests the samples of synthesized substances.


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