Patents by Inventor Horst Steinhofel

Horst Steinhofel 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).

  • Process of briquetting sponge iron-containing material
    Patent number: 4308055
    Abstract: An improved process for briquetting sponge iron-containing material wherein as binder there is employed dilute sulfuric acid and the sponge iron-containing material contains at least 40% by weight metallic iron.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: December 29, 1981
    Assignee: Metallgesellschaft AG
    Inventors: Harry Serbent, Horst Steinhofel, Werner Kaas, Justus Kuhn, deceased
  • Process of calcining limestone or hydrated lime in a rotary kiln
    Patent number: 4220631
    Abstract: A process for the calcining of limestone or hydrated lime by thermal treatment thereof with hot gases in an oxidizing atmosphere in a rotary kiln through which the kiln atmosphere and the charge are countercurrently passed, which kiln is fed with fuel from shell burners, is described. The invention resides in the use of different fuels which release different quantities of SO.sub.2 and SO.sub.3 per unit of calorific heat. The fuel which releases the larger quantity of SO.sub.2 or SO.sub.3 per unit value of calorific heat is supplied to the upper portion of the rotary kiln, and the fuel which releases the smaller quantity of SO.sub.2 and SO.sub.3 per unit of calorific heat is supplied to the lower portion of the rotary kiln.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: September 2, 1980
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Harry Serbent, Heinz Eichberger, Hermann Lommert, Herbert Lausch, Horst Steinhofel