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The specific process employed will depend on factors such as the characteristics and constituents of the potash ore and the market specifications. Generally, the ore is reduced in size using a system of crushing and grinding to liberate the different miner- als from each other. This is usually followed by desliming by intense agitation followed by flotation or hydrocyclones to separate the fines consisting of clays, dolomite and sand from the potash ore. Four basic techniques are used to separate the waste minerals or by-products such as salt and concentrate the potash; flotation, electrostatic separation, thermal dissolution-crystallization, and heavy media separa- tion. Several of these may be used together to enhance recovery | Report of the Green Growth Advisory Group DECEMBER 2011 GREENING NEW ZEALAND S GROWTH 1 4.Sir Ji . . i E. J f t V. f ị.s f f xỉ 5Íl --jit . gjWy .dk-Ki Tf tfKĨ IM - GIS M ĩ iSri J SKSw -Jal 1 Correspondence in relation to this report can be directed to Green Growth Advisory Group Secretariat c o Ministry of Economic Development Level 10 33 Bowen Street PO Box 1473 Wellington Contents Page Opening Statement 2 Summary of Recommendations 4 Section 1 Defining Green Growth 11 Section 2 New Zealand Perspective 14 Section 3 Building Consensus 21 Section 4 Enabling Growth 26 Section 5 Sector Opportunities 46 Section 6 Conclusion 63 Appendix 1 Terms of Reference 64 Appendix 2 Group Members 65 Appendix 3 Dialogue 67 Appendix 4 Further Reading 69 December 2011 GREENING NEW ZEALAND S GROWTH