Abstract
The results of laboratory experiments on study of antifreezing effect of lime at its introduction into iron ore concentrate (before transportation) with consumption from 20 to 60 kg/t of concentrate are presented. It was found that the antifreezing effect of lime is manifested in the whole range of lime consumption in the form of a decrease in the crushing strength of samples of lime concentrate after freezing in comparison with similar samples of wet concentrate. Antifreezing effect of lime increases in proportion to the amount of active CaO introduced with lime, which is due to a decrease in free capillary moisture in the lime concentrate. Recommendations on liming of con-centrate to prevent its freezing in winter conditions are given.
Keywords:
lime, iron ore concentrate, humidity, freezing, prevention.