Abstract:
The objectives of this research are to analyze empirically the effects of different
explanatory variables on recovery and grade of copper from ore found in North
Waziristan and to develop mathematical models for the enrichment of copper in
Pakistan.
This study is based on the primary data from flotation process experiment for
enrichment of copper. Seven variables were studied in experiments. The variable were
type and dosage of collector (X1g/ton) pH (X2), depressant sodium cyanide (X3 g/ton)
sulfidizer Na2S(X4g/ton), frother dosage (X5 g/ton), pulp density (X6 w/v) and
conditioning time (X7 minute) and consists of 31 observations. Flotation process
parameters were studied to concentrate the copper content of chalocopyrite the North
Waziristan copper ore. Mathematical models were developed using various model
selection procedures. Regression parameters were estimated by applying Ordinary
Least Squares (OLS) method for regression analysis and adopted general to simple
modeling procedure. In this study we found that the variables X1, X3, X4 and X6 of
equation (5.57) are statistically significant and concluded that an increase in these
variables there is increase in recovery of copper.
Maximum grade were obtained from equation (6.65) the combined significance
variable X1, X3, and X7.
