Patents Assigned to Sirius Minerals PLC
  • Dry powder processing
    Patent number: 10252952
    Abstract: A method for forming a pelletized evaporite mineral product, the method comprising: pulverizing an evaporite mineral feedstock to form a dry powder; mixing the dry powder with a binder in the presence of a liquid to form an intermediate blend; and processing the intermediate blend using a pelletizer to form pellets principally composed of the evaporite mineral.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: April 9, 2019
    Assignee: SIRIUS MINERALS PLC
    Inventors: Steve Farnworth, Mike Evans, Jim Evans
  • Seed preparation
    Patent number: 9949424
    Abstract: A coated seed product, the product comprising: at least one plant seed; and a coating adhered to the exterior of the plant seed, the coating comprising one or more evaporite minerals, preferably polyhalite.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: April 24, 2018
    Assignee: Sirius Minerals PLC
    Inventor: Robert Meakin
  • Pelletising an evaporite mineral
    Patent number: 9856180
    Abstract: A method for forming a pelletized evaporite mineral product, the method comprising: forming a material comprising a liquid and at least 50% by mass of an evaporite mineral powder; and processing the material using a pan pelletizer to form pellets comprising the material, the pan pelletizer being configured so that the mean dwell time of the material in the pan of the pelletizer is in the range from 60 to 120 seconds and the mean diameter of the pellets formed by the pelletizer is in the range from 1 to 8 mm.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: January 2, 2018
    Assignee: Sirius Minerals PLC
    Inventors: Steve Farnworth, Mike Evans, Jim Evans