Metallurgic Efficiency

The Reichert LG7 spirals produce a high relation of concentration with an exceptional recuperation of the mineral. Generally, in the circuits of recuperation of gold, one stage of concentration in the LG7 spiral will give as a result an ascendant proportion of approximately 50 to 1, with recuperation of mineral nearly a 90%. The true results depend on many factors, for example, the amount of minerals of high specific gravity in the feeding of the spiral, the distribution by size of the values of mineral with respect to the particles of the gangue and the degree of liberation of the minerals of the particles of the gangue (amount of the true intermediate components).

The Reichert LG7 spiral was introduced in the North American mining industry in August of 1982. from then on, an equivalent number to approximately 300 channels-spirals has been installed in diverse applications of recuperation of gold in the United States and Canada. The characteristics of functioning vary according to the particular installments.

The Reichert LG7 spirals have worked in an efficient form under an ample gama of conditions of feeding, using an ample variety of materials of feeding. The definite evaluations of the recuperation by size have not been concluding due to the difficulty of determining in exact form the value in the materials of feeding. The granulometric analysis of the concentrated products have indicated that important amounts of values in the sizes of net 325 and net of 400 are recuperated. The minimal losses of the values in the waste show that total excellent recuperation are performed, which indicates that the efficiency of the extraction of the material of fine size must be considerable.

The author wishes to express his thanks and appreciation to the companies mentioned in the document for the permission given for using the results of tests of their plants, and at Mineral Deposits Limited and its personnel, for its counseling given when mentioning the obtaining of information about the operation and function of the spiral LG7.