Patents by Inventor Petrus Hendrik Ferreira BOUWER

Petrus Hendrik Ferreira BOUWER has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11453830
    Abstract: This invention relates to a method and a reactor for gasifying a carbonaceous feedstock material. The method includes the steps of choke-feeding a carbonaceous feedstock material into a pyrolysis zone of the reactor to form a discharge bed; heating the discharge bed to initiate pyrolysis of the feedstock material to form a pyrolysis product; providing a lower lying upper oxidation zone; gasifying the pyrolysis product to form a bed of char; converting thermal energy into chemical energy in an upper reduction zone; providing a lower lying lower oxidation zone; collecting any metal slag and/or slag melts in the lower oxidation zone; and discharging hot reducing gases having a temperature of at least 1300° C. and a CO/CO2 ratio of ?5, more preferably ?15.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: September 27, 2022
    Assignee: African Rainbow Minerals Limited
    Inventors: André Wegner, Petrus Hendrik Ferreira Bouwer
  • Publication number: 20220220572
    Abstract: The present invention relates to a process for the smelting of a metalliferous feedstock material. The process includes the steps of: (i) feeding an agglomerate comprising of a fine metalliferous feedstock material and a fine reductant to a reactor, the agglomerate forming a packed bed within the reactor; (ii) smelting the agglomerate by passing a hot reducing gas counter current through the packed bed to form a molten material comprising a partially reduced metalliferous constituent, an intermediate slag constituent and entrained unreacted reductant constituent; and (iii) channelling the molten material to flow into a vessel to form a metal product and a slag product.
    Type: Application
    Filed: May 11, 2020
    Publication date: July 14, 2022
    Inventor: Petrus Hendrik Ferreira BOUWER
  • Publication number: 20220049169
    Abstract: This invention relates to a method and a reactor for gasifying a carbonaceous feedstock material. The method includes the steps of choke-feeding a carbonaceous feedstock material into a pyrolysis zone of the reactor to form a discharge bed; heating the discharge bed to initiate pyrolysis of the feedstock material to form a pyrolysis product; providing a lower lying upper oxidation zone; gasifying the pyrolysis product to form a bed of char; converting thermal energy into chemical energy in an upper reduction zone; providing a lower lying lower oxidation zone; collecting any metal slag and/or slag melts in the lower oxidation zone; and discharging hot reducing gases having a temperature of at least 1300° C. and a CO/CO2 ratio of ?5, more preferably ?15.
    Type: Application
    Filed: November 28, 2019
    Publication date: February 17, 2022
    Inventors: André WEGNER, Petrus Hendrik Ferreira BOUWER