Patents by Inventor Lev P. Feofanov

Lev P. Feofanov 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).

  • Raw mix for the production of portland cement clinker
    Patent number: 4224077
    Abstract: A raw mix for the production of portland cement mix consists of a lime component, a clay component, an iron-containing component, and a modifying additive comprising hydrolysis and yeast production waste liquors and products of neutralization of chlorine-containing off-gas from titanium and magnesium production, with the following proportioning of the components (% by weight):______________________________________ lime component 50-52 clay component 7.5-10 iron-containing component 1-1.5 hydrolysis and yeast production waste liquors 30-38 products of neutralization of chlorine- containing off-gas from titanium and magnesium production 1-9. ______________________________________The raw mix according to the invention exhibits improved physico-chemical and mechanical properties. Fluidity of the mix is from 58 to 60 mm, the degree of decarbonization is as high as 18%. Clinker prepared from the mix according to the invention has a strength of from 550 to 560 kgf/cm.sup.2, and the roasting temperature is 80.degree.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: September 23, 1980
    Inventors: Vladimir P. Olifer, Sergei P. Berezkin, Pavel N. Galkin, Anatoly I. Ternovoi, Alexandr A. Rogatkin, Nikolai I. Stovba, Lev P. Feofanov, Leonid P. Khlopkov, Anna I. Tryastsina, Lidia I. Lekalova, Larisa A. Telina, Vera I. Mikheeva
  • Process for the preparation of Portland cement clinker
    Patent number: 4219363
    Abstract: A process for the preparation of Portland cement clinker resides in that limey, clayey and iron-containing components are ground together. The mix is then homogeneized pelletized, decarbonized at 800.degree. to 1000.degree. C. and roasted at 1200.degree. to 1350.degree. C. Dust sublimates--wastes of the titanium production--are added at the stage of grinding or homogeneization in an amount of 0.5 to 6.0% by total weight of raw mix, and, in case the dust sublimates are added at the homogeneization stage, an aqueous suspension of cakes--wastes of the titanium and magnesium production--is added at the pelletizing stage, at a volumetric ratio of water to cakes of 3-6:1, and in an amount of 10 to 14% by total weight of raw mix.The process according to the invention enables the preparation of clinker exhibiting an improved strength. With the process according to the invention, the degree of decarbonization of raw mix is as high as 35-50%, and roasting temperature is 120.degree.-150.degree. C. lower.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: August 26, 1980
    Inventors: Vladimir A. Tokar, Maria I. Zubik, Grigory M. Baklanov, Nikolai F. Matygin, Valentin S. Ustinov, Anatoly V. Kolesnikov, Stanislav I. Gashenko, Alexandr A. Rogatkin, Leonid P. Khlopkov, Vera I. Mikheeva, Lidia I. Lekalova, Nikolai F. Drepin, Lev P. Feofanov, Nina E. Khodotova, Ivan I. Shevchenko, Larisa A. Telina, Vladimir I. Garmash, Andrei M. Frantsevich