Patent ID: 8435322

Claim:
A method of producing a thermofertiliser from potassium-bearing minerals comprising: grinding the potassium-bearing minerals; screening a size of the potassium-bearing minerals to determine whether the size of the potassium-bearing minerals is within a first size range; when the size of the potassium-bearing minerals is within the first size range, mixing the potassium-bearing minerals with a first set of additives; heating the mixed potassium-bearing minerals to a first temperature for a period of time; cooling the mixed potassium-bearing minerals down to a second temperature after the period of time; grinding the mixed potassium-bearing minerals; screening the size of the mixed potassium-bearing minerals to determine whether the size of the mixed potassium-bearing minerals is within a second size range; and when the size of the potassium-bearing minerals is within the second size range, mixing the potassium-bearing minerals with a second set of additives so as to form said thermofertiliser.