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    • 6. 发明专利
    • Low cost high throughput cement clinker production
    • DE19645379A1
    • 1998-05-07
    • DE19645379
    • 1996-11-04
    • LOERKE PAULLOERKE ALEXANDER
    • LOERKE PAULLOERKE ALEXANDER
    • C04B7/38C04B7/43C04B7/52C04B7/48
    • A wet and dry process for producing cement clinker from basic and acidic raw material components, involving drying, grinding, mixing and thermal treatment stages of preheating, calcining, sintering and cooling, comprises using: (a) a marl raw material having a 0.01-80 mu m to 80.01-2000 mu m particle class ratio of 1.5:1 to 1:9; (b) an acidic raw material component, which is to be ground finely to below 80 mu m size, supplied to the 0.01-80 mu m particle class fraction of the raw material, in addition to the incoming finely ground coal ash, in an amount which ensures a modulus 'n' defined by the relation (1) of 1.1-1.5 in this 0.01-80 mu m particle class fraction and the requisite SM and/or TM of the entire raw material; and (c) limestone, which is to be ground to 40-90% residue on a 80 mu m sieve, supplied to the 80-2000 mu m particle class fraction of the entire raw material in an a mount depending on the requisite KSt II of the raw material. (CaO+MgO+FeO+0.31Fe3O4-0.92Al2O3-0.81Fe2O3)\/SiO2) (1) Also claimed are (i) a method of optimising the fractional particle size composition of raw material for cement clinker production; and (ii) a method of producing cement clinker from basic and acidic raw material components.
    • 8. 发明申请
    • METHOD FOR PRODUCING A CONCRETE MIXTURE
    • 方法生产混凝土混合
    • WO2008152111A3
    • 2009-04-09
    • PCT/EP2008057425
    • 2008-06-12
    • LOERKE PAUL
    • LOERKE PAUL
    • B28C5/00C04B40/00
    • C04B40/0028B28C5/003C04B14/06C04B20/0076C04B28/02C04B40/0021C04B2103/32C04B40/005
    • The invention relates to a novel method for producing a concrete mixture. According to said method, in a preliminary mixing stage, water and fine-grained concrete components, at least cement and as required sand, in a quantity of between 2 and 97 % of the total sand fraction in the concrete mixture, filler and a water-reducing admixture are pre-mixed in a mixing process and by ultrasonic treatment and then in a final mixing stage the mixture produced from water and fine-grained concrete components, at least consisting of cement, is subsequently mixed into the remaining sand and the coarse crushed rock. The advantages of the method are characterised by reduced energy expenditure during the mixing of the concrete and by an increased strength of the concrete.
    • 混凝土混合料的制造新的过程发生在,在至少水泥的水和细粒度混凝土成分的预混合,并根据在2的量的需要砂来在混凝土混合物中的总砂级分的97%,填料和流动剂,通过至少混合和 超声波处理进行预混合,然后将水和由细粒混凝土部件中的与其他混凝土构件至少水泥混合物,砂中的至少剩余部分,且粗骨料是在最终混合步骤最后混合。 该方法的优点是其特征在于用于混凝土搅拌减小的能量需求,并且由混凝土的强度增加。
    • 9. 发明专利
    • White cement production comprises multistage heat exchange of the clinker with fuel and combustion air and using separated undersize clinker particles as grinding charge
    • DE19844038A1
    • 2000-03-30
    • DE19844038
    • 1998-09-25
    • LOERKE PAUL
    • LOERKE PAUL
    • C04B7/36C04B7/38C04B7/47F27B7/36F27B7/38C04B7/43
    • A white cement production process, comprising multistage heat exchange of the clinker with fuel and combustion air and using separated undersize clinker particles as grinding charge, is new. A white cement production process comprises using a raw cement starting material having a weight ratio of 0.01-80 microns particle size class to 80.01-2000 microns particle size class of 9-1:1-9 and separating undersize particles in the 0.01-60 microns to 0.01-200 microns particle size range in an amount of 3-100 wt.%, the separated undersize particles subsequently being used as grinding charge for producing white cement. The kiln output clinker is pre-cooled to 1100-900 deg C in a first heat exchange stage by direct heat exchange with the cooling air and then cooled in a second heat exchange stage, by direct and/or indirect heat exchange with a gaseous, liquid and/or solid fuel and the gasification medium used for CO and H2 formation under a large stoichiometric fuel excess, to a temperature above that at which soot formation occurs. The CO and H2 concentration in the resulting oxygen-free reducing gas medium is increased to a non-explosive range suited to Fe(I) to Fe(II) reduction sufficiently high CO and H2 concentration, the reducing treatment in the second heat exchange stage lasting until the whiteness of the clinker is sufficiently high. The clinker is then cooled to a temperature at which re-oxidation occurs when the clinker is in direct contact with air, the resulting preheated coloring metal-free fuel being supplied to the kiln as direct firing fuel. The clinker, leaving the second heat exchange stage, is supplied to a third heat exchange stage for cooling to 100-150 deg C by direct contact with atmospheric air which is thus heated to 300-500 deg C, the waste cooling air from the first and third heat exchange stages being supplied to the rotary kiln and then to the calciner as combustion air. An Independent claim is also included for a plant for carrying out the above process.