Phosphorus, Boron, Chromium, Molybdenum, Vanadium, Or Nickel Containing Raw Material (p, B, Cr, Mo, V, Ni) Patents (Class 106/766)
  • Iron-doped sulfo-belitic clinker
    Patent number: 8568528
    Abstract: The present invention relates to a novel iron-doped sulphoaluminate-belite clinker, a process for preparing this clinker, and also the use of the clinker for the preparation of hydraulic binder and, consequently, of grout, concrete or mortar.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: October 29, 2013
    Assignee: Vicat
    Inventors: Laury Barnes-Davin, Pascal Meric, Michel Pasquier, Guy Beauvent
  • Apparatus and method for reducing emissions resulting from raw meal grinding
    Patent number: 7972419
    Abstract: Disclosed is a method for reducing emissions from exhaust gas generated during the grinding and drying of cement raw meal as part of a cement manufacturing process. The invention comprises circuiting the exhaust gas between a raw mill and a clinker cooler. In the clinker cooler at least a portion of said emissions are delivered to a cement kiln in which said emissions are removed by being combusted and/or absorbed.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: July 5, 2011
    Assignee: FLSmidth A/S
    Inventors: Ove L. Jepsen, Steven Miller, Anthony Shave
  • Ferrophosphorus alloys and their use in cement composites
    Patent number: 6197106
    Abstract: Amorphous ferrophosphorus alloys (Formula II) are useful as shrinkage control agents in cement composites, and new amorphous ferrophosphorus alloys particularly useful for this purpose are disclosed having the formula: FeaCrbMcPdCeSif  (Formula I) wherein M is a metal selected from the group consisting of Vg, Nih, Mni and mixtures thereof, and a is about 66-76, b is about 1-10, c is about 2-7, d about 12-20, e about 1-6, f is less than about 2, g is about 1-5, h is less than about 2 and i is less than about 2, atomic percent.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: March 6, 2001
    Inventors: Robert H. Tieckelmann, George M. Diken
  • Cement composition and methods for producing same
    Patent number: 5362321
    Abstract: A cement composition comprising 1) a cement containing water-soluble chromate and 2) at least one manganese(II) compound in an amount sufficient to reduce the amount of water-soluble chromate to at the most 2 mg of Cr(VI) per kg of the cement, the determination of the chromate content being carried out by elution of the composition in water for 15 minutes at a water/cement ratio 1, filtration and determination of the chromate content in the filtrate.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: November 8, 1994
    Assignee: Aalborg Portland A/S
    Inventor: Soren B. Larsen
  • Portland cement clinker and portland cement
    Patent number: 5356472
    Abstract: The present invention pertains to a portland cement clinker containing the following amounts of clinker phases, in wt. %:C.sub.3 S: 30 to 80,C.sub.4 A.sub.3 S: 5 to 30,C.sub.4 AF: <30,C.sub.2 S: <40,C.sub.3 A: <20,and an SO.sub.3 content between 2 and 8 wt. %, obtained by calcining a raw material mixture containing CaO, SIO.sub.2, AL.sub.2 O.sub.3, and Fe.sub.2 O.sub.3 in the presence of an additive containing SO.sub.3 and an additive containing fluorine at temperatures between 1,150.degree. C. and 1,350.degree. C.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: October 18, 1994
    Inventor: Ivan Odler
  • Method for production of portland clinker
    Patent number: 5043020
    Abstract: A method for producing portland clinker which includes the steps of calcining a mixture of raw materials, at 1,350.degree.-1.450.degree. C. in a reducing gaseous medium containing more than 80 mass % of carbon monoxide, said mixture containing 59.7-65.05 mass % of limestone, 32.83-39.07 mass % of phosphoric slag and 1.07-6.21 mass % of additional materials containing not less than 40 mass % of iron oxide. The calcined product is then subjected to forced cooling.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: August 27, 1991
    Inventors: Pavel P. Lerke, Stanislav V. Terekhovich, Bakhyt D. Aldiyarov, Valery V. Shnaider, Pavel B. Kurnikov, Pavel B. Kurnikov