ICL-UK has reported a doubling in the volume of polyhalite fertiliser extracted from its Boulby mine in Cleveland, a year after the business ceased muriate of potash mining to concentrate on polyhalite.

The business produced 136,000 tonnes of polyhalite, which is marketed as Polysulphate, in the April-June 2019 quarter. Some of this volume went to making 34,000 tonnes of the PotashpluS fertiliser, a combination of polyhalite and potash, which was launched in late 2018.

ICL vice-president and Boulby general manager Andrew Fulton adds that July’s polysulphate total of 57,288 tonnes is the best monthly production figure to date.

“The doubling in our production demonstrates the importance being played by our pioneering work, leading the world in exploiting the potential of polyhalite to help farmers increase growth and yield across the world,” he says.

“Already we are selling Polysulphate products across five continents and interest from farmers and growers is increasing all the time.”

ICL intends to produce 700,000 tonnes of Polysulphate – which contains sulphur, potassium, magnesium and calcium – by the end of 2019, rising to 1.0m tonnes in 2020 and 1.3m tonnes by 2023. The business made the switch to polyhalite in June 2018, as the cost of reaching muriate of potash deposits became prohibitive.