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    METHOD OF PRODUCTION OF CHEMICALLY PRECIPITATED CHALK
    1.
    发明专利
    METHOD OF PRODUCTION OF CHEMICALLY PRECIPITATED CHALK 未知

    公开(公告)号：RU2156737C1

    公开(公告)日：2000-09-27

    申请号：RU2000105468

    申请日：2000-03-07

    Applicant: KUZNETSOV IGOR OLEGOVICH

    Inventor： DRUZHBIN G A ,  KARAPIRA N I ,  KUZNETSOV I O ,  CHUDNOVTSEV V I

    IPC: C01F11/18

    Abstract: inorganic materials. SUBSTANCE: invention relates to methods of production of chemically precipitated chalk that can be used in food, perfume-cosmetic, medicinal, chemical and other branches of industry. Method of production of chemically precipitated chalk involves slaking limestone with water at 80-90 C, carbonization of milk of lime to yield chalk suspension, separation and drying the end product. Limestone slaking with water is carried out up to formation of 10-14% suspension of milk of lime and before carbonization milk of lime suspension is subjected for treatment. Carbonization is carried out with gas of limestone-roasting furnaces with carbon dioxide volume part 20%, not less. Chalk product is separated under vacuum 80-90 Pa and drying up to attainment of bulk density value 0.25-0.35 g/cm3, not above. Optimal conditions of the process are the following: for slaking technological lumpy limestone with mass part of sum of active calcium oxide and magnesium oxide (as measured for calcium oxide) 70%, not less, is used; milk of lime suspension is subjected for treatment up to attainment of density value 1.06-1.11 g/cm3 at 20 C; gas of limestone-roasting furnaces is purified preliminary in dust-collecting chamber, cyclone and water countercurrent settlers; product is dried in loop-shaped driers using natural gas combustion products as a heat carrier; after drying product is ground. EFFECT: decreased energy consumption, enhanced degree of chalk whiteness. 7 cl

    PROCESS LUMPY LIME
    2.
    发明专利
    PROCESS LUMPY LIME 未知

    公开(公告)号：RU2155724C1

    公开(公告)日：2000-09-10

    申请号：RU2000105466

    申请日：2000-03-07

    Applicant: KUZNETSOV IGOR OLEGOVICH

    Inventor： DRUZHBIN G A ,  KARAPIRA N I ,  KUZNETSOV I O ,  CHUDNOVTSEV V I

    IPC: C04B2/00

    Abstract: compositions of lumpy process limes applicable in chemical industry as process raw material, and in metallurgical industry, as fluxes. SUBSTANCE: process lumpy lime contains, wt.%: magnesium oxide 2.5-3.5; sum of iron and aluminum oxides 1.0-1.5; the balance, calcium oxide. Lime density is 2.6-2.8 g/cu.cm. Offered lime due to balanced composition is suitable for use not only in chemical and metallurgical industries but also in construction and agriculture. EFFECT: higher quality of product.

    METHOD OF NATURAL CALCIUM CARBONATE PROCESSING
    3.
    发明专利
    METHOD OF NATURAL CALCIUM CARBONATE PROCESSING 未知

    公开(公告)号：RU2156738C1

    公开(公告)日：2000-09-27

    申请号：RU2000107658

    申请日：2000-03-30

    Applicant: KUZNETSOV IGOR OLEGOVICH

    Inventor： DRUZHBIN G A ,  KARAPIRA N I ,  KUZNETSOV I O ,  CHUDNOVTSEV V I

    IPC: C01F11/18 ,  C04B2/10

    Abstract: inorganic materials. SUBSTANCE: invention relates to mineral resources processing. Method of processing natural calcium carbonate to crushed stone involves grinding and classification. Natural limestone containing 16-25% of lamellar and needle forms of calcium carbonate in total limestone volume is subjected for processing. In classification of fraction 0-70 mm to be sieved the end product is isolated that has mass part of 20-40 mm fraction 65%, not less, mass part of 40 mm fraction 20%, not above, and mass part less 20 mm fraction 20%, not above. Lime-stone of East-Pyatnitsky layer is preferable for using. Obtained crush stone is referred to the 1-st grade of quality. EFFECT: high quality of crushed stone. 2 cl, 1 ex

    METHOD OF LIME PRODUCTION
    5.
    发明专利
    METHOD OF LIME PRODUCTION 未知

    公开(公告)号：RU2155726C1

    公开(公告)日：2000-09-10

    申请号：RU2000105467

    申请日：2000-03-07

    Applicant: KUZNETSOV IGOR OLEGOVICH

    Inventor： DRUZHBIN G A ,  KARAPIRA N I ,  KUZNETSOV I O ,  CHUDNOVTSEV V I

    IPC: C04B2/12

    Abstract: production of lime applicable in chemical industry as process raw material and in metallurgical industry, as fluxes. SUBSTANCE: method includes crushing of limestone to obtain fractions sizing 40-150 mm, burning of lumpy limestone in shaft kiln with combustion products of fuel in form of natural gas counterflow from top downward successively in three process zones: zone of heating with temperature up to 900 C, zone of burning itself with temperature of 900-1200 C, and zone of cooling with temperature of 40-70 C. Natural gas is supplied to kiln at pressure of 2- 45 kPa. Limestone is crushed by screening. Lime is subjected to crushing after cooling zone in jaw and hummer crushers. A portion of kiln gas with concentration of carbon dioxide of, at least, 20% is utilized and directed for production of white black and chemically precipitated chalk. EFFECT: higher degree of burning, reduced process duration and higher process efficiency. 6 cl

    METHOD OF LIMESTONE PROCESSING
    6.
    发明专利
    METHOD OF LIMESTONE PROCESSING 未知

    公开(公告)号：RU2155725C1

    公开(公告)日：2000-09-10

    申请号：RU2000105465

    申请日：2000-03-07

    Applicant: KUZNETSOV IGOR OLEGOVICH

    Inventor： DRUZHBIN G A ,  KARAPIRA N I ,  KUZNETSOV I O ,  CHUDNOVTSEV V I

    IPC: C04B2/12

    Abstract: methods of processing of limestone used for production of lime applicable in chemical industry as process raw material and in metallurgical industry, as fluxes. SUBSTANCE: method includes crushing of ore mass to form sizing not in excess of 300 mm, dry concentration by grinding and classification to main product fraction of 70-150 mm in amount of 60- 70% of total weight of limestone, determination before burning of total mass fraction for each concrete fraction by formula X=100xMl/M, where X is total mass fraction of concrete fraction, %; Ml is limestone weight passed through screen with preset sizes of meshes, kg; M is weight of limestone sample, kg, and burning under condition of counterflow from top downward successively in three process zones: zone of heating with temperature up 900 C, zone of burning itself with temperature of 900- 1200 C, and cooling zone with temperature of 40-70 C. Carried out additionally is classification to fractions of 40-70 and 20-40 mm, with fraction of limestone lumps sizing above 150 mm amounting to not more than 5%, and those sizing less than 70 mm are not in excess of 30%. EFFECT: higher efficiency of process with higher quality of product. 4 cl

    CHEMICALLY PRECIPITATED CHALK
    9.
    发明专利
    CHEMICALLY PRECIPITATED CHALK 未知

    公开(公告)号：RU2156736C1

    公开(公告)日：2000-09-27

    申请号：RU2000105464

    申请日：2000-03-07

    Applicant: KUZNETSOV IGOR OLEGOVICH

    Inventor： DRUZHBIN G A ,  KARAPIRA N I ,  KUZNETSOV I O ,  CHUDNOVTSEV V I

    IPC: C01F11/18

    Abstract: inorganic materials. SUBSTANCE: chemically precipitated chalk containing calcium carbonate, magnesium carbonate, iron and aluminium oxides, silicon dioxide and water-soluble compounds has components in the following ratio, wt.-%: sum of iron and aluminium oxides, 0.4-0.7; silicon dioxide, 0.014, not above; manganese, 0.01, not above; copper, 0.0005, not above; water-soluble compounds, 0.50-1.5; sum of calcium carbonate and magnesium carbonate, the balance. Chalk bulk density is 0.25-0.4 g/cm3 and sum of iron and aluminium oxides has iron (as measured for iron oxide) in the amount 0.1-0.3%. Chalk has calcium, magnesium, aluminium, iron, copper, manganese chlorides and nitrates. Invention can be used in food, perfume-cosmetic, medicinal, chemical and other branches of industry. EFFECT: enhanced whiteness and other quality properties of ready product. 3 cl

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