RE: ECharters predicting 1.50 in 18 months echarters? what s his claim to fame? is it in potash mining? any reason for his opinion given? then why spam this board ? i gave you something concrete: estimation on the energy costs (grinding and heating for cambridge process kcl) .look at pea documents for thermopotash : it is 17 usd/tone ( using coke petroleum) . normal potash need 5 times the concentration of TK. so you get an energy cost of 5*17=85 usd/tonne for cambridge process. since it is simple and reactants recyclable , i find it impossible for the opex for kcl to be higher than 250usd/t. energy requirements were the most important and i showed they should clearly be under 100 usd/t.