| Annotation |
The technological processes of enrichment are based on the consumption of
a large amount of water from ore processing to the production of finished products.
Water is an integral participant in enrichment, and its quality directly affects the level of
extraction of the useful component and the quality of the products obtained during the
enrichment process. One of the main socio-economic problems is the conservation
of water resources and the reduction of environmental pollution. The solution to this
problem is to reduce the consumption of fresh water in technological processes and
increase the degree of water turnover at industrial enterprises. The object of the study
is the process of flotation enrichment of relatively poor tungsten ore, with an initial
content of a valuable component of 0.35–0.42 %. The purpose of the study is to search
for new technological solutions in conditions of closed water circulation to reduce the
consumption of fresh water and ensure a satisfactory level of extraction and quality of
final products. Research objectives are the following: selection of the optimal flotation
regime in conditions of a closed water circulation, localization of the area of impurity
concentrations and determination of the maximum concentrations of components at
which their effect on extraction is within acceptable limits, establishment of the necessary
conditioning modes. The significance of the research lies in the need to find new
technological solutions in a closed water cycle to reduce the consumption of fresh
water and ensure a satisfactory level of extraction and quality of the final products.
This article examines the relevance of the problem arising during the processing of
tungsten calcium-containing ores in the conditions of water circulation. According to
theoretical and experimental studies, it was found that without pre-conditioning of recycled
water, the technological indicators of enrichment are significantly reduced, so,
for example, the extraction of a valuable component in a closed water cycle is reduced
from 80 to 40 %. This is due to the accumulation of a significant amount of carbonates
and silicates in the recycled water. These indicators do not meet the requirements
and are the basis for the search for new technological solutions. Based on this,
a three-stage experiment was conducted, which allowed determining the maximum
concentrations of harmful impurities. It is revealed that the maximum concentration of
silicates depends on the carbonate background of the waters. The obtained data of
experimental studies on the pre-conditioning of circulating waters satisfy the required
qualitative and quantitative indicators. Two methods of conditioning have been developed
– chemical and physico-chemical. |
| Key words |
flotation, tungsten ores,water conditioning,circulating water, reagentmode, closed cycle, content,extraction, carbonates,silicates |
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