HANNOVER MESSE 2019,
01 - 05 April
The technology makes it possible to concentrate raw quartz by dry methods with the obtaining of high quality glass sands.To obtain the finished product with the size of 0,1-0,5 mm from the source raw quartz, the size being more than 0,5mm, the grinding complexes are used which are based on the centrifugal-impact mills. The main advantage of the mills is low capital and operation costs:- there is no need in special foundations to mount the mills, they can be installed on an even site at any level of a production building;- the design of the mill is marked by simplicity and convenience at service works;- all the surfaces and parts subjected to wear are protected by special lining elements;- the grain size composition of the ground material does not depend on the wearof lining elements.The type of the equipment referred to can also be used for the obtaining of crushed quartzwith the particle size less than 0,05 mm. The fineness of grind can be regulated in a widesize range. The technology of procession of glass raw material coarse fractions developed in OJSC «NPO Center» permits the obtaining of high quality glass concentrate of 0,1-0,5 mm fromthe fraction more than 0,5 mm by way of grinding, attritioning and further magnetic separation.The content of Fe2O3 in the obtained products after dry attritioning comes to (depending on the source product) 0,030-0,050% and after the magnetic separation it may be as much as 0,015-0,030%. The data are confirmed by the work done with the quartz sand of different deposits.The complex for the dry attritioning of quartz sands of NPO «Center» is one of the elements to implement the quartz sands dry treatment technology. The post-grinding product differs by a narrow grain size composition with a low content of dust (less than 0,1 mm) fractions.
OJSC «NPO Center» is specialized in engineering service in the sphere of mining and mineral processing.
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