Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C19/00—Other disintegrating devices or methods
  • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B7/00—Hydraulic cements
  • C04B7/36—Manufacture of hydraulic cements in general
  • C04B7/48—Clinker treatment
  • C04B7/52—Grinding ; After-treatment of ground cement
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C19/00—Other disintegrating devices or methods
  • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
  • B02C2019/183—Crushing by discharge of high electrical energy

Definitions

• the present invention relates to a method of destruction of a solid substance, for example, dielectric or/and semiconductor materials, in particular building inorganic astringents and cementings, mineral fertilizers, minerals, and may be used in building, cementing, chemical, ore mining and processing industries and others branches.
• a solid substance for example, dielectric or/and semiconductor materials, in particular building inorganic astringents and cementings, mineral fertilizers, minerals, and may be used in building, cementing, chemical, ore mining and processing industries and others branches.
• Known are method and apparatus for slurry cleaning of an autoloader drum (RU 2052295, Bulletin of Inventions No.2, publ. 20.01.96) .
• the method includes supplying water under pressure, demolition and slackening of slurry, and removal of slurry using an auxiliary instrument, such as a camera with electric discharge device.
• the method requires using an auxiliary equipment and subsidiary expenditure of electric power .
• the object of the proposed invention is a method of destruction of solid dielectrics and semiconductors, the method providing the increase of productivity of conventional crushing equipment and offering reduction of power consumption of crushing processes or providing the higher dispersion degree of material at the same power imputes.
• the object of the present invention is achieved by providing a method of destruction of dielectrics and semiconductors by means of mechanical attack on material to be destroyed of a destroying means and physical influence.
• the physical influence is effected by applying sign- alternative frequency-modulated electrical potential either to the means for mechanical destroying, or to a material under processing which is placed in a working space of said means.
• the sign-alternative frequency-modulated electrical potential may be supplied from electronic or electromechanical generator.
• a characteristic feature of the proposed method is also a fact, that the sign-alternative frequency-modulated electrical potential may be supplied both to the means for destroying and material to be destroyed by the same electrode.
• frequency-modulated alternative electric field has carrier frequency in range from 10 Hertz to 50 kHertz, preferably from 30 Hertz to 10 kHertz.
• Applied potential is from 0.5 to 300 V, preferably from 1 to 100 V.
• the sign-alternative frequency-modulated electrical potential may be applied both to the crusher' s working body and to the said material.
• a conical crusher a cone-inertial crusher can also be used. If the material is crushed in a mill, for example, in a ball mill, a sign- alternative frequency-modulated electrical potential may be applied to a frame of a mill and to the said material.
• dielectrics and semiconductors selected from the group including bituminous and brown coals, shungits, granites, limestone, oxides of metals, ores of non-ferrous metals and ferrous metals, building inorganic astringents and cementings, mineral fertilizers and so on.
• Inorganic astringents are selected from the group including cement clinker, mixtures of slaked lime and quartz sand, alumina and so on.
• Ores of non-ferrous and ferrous metals are selected from the group including iron ore, copper-nickel sulphide ores, silicate-nickel ores, phosphorites and apatites.
• the next step is to crush the solid materials in a conventional crushing and crumbling means with applying the sign-alternative frequency-modulated electrical potential provided by single electrode (SE) . Due to particles of this material gain a momentary sign-identical charge, the repulsion of particles and the intensive destruction "from inside” occur. As a result, a sudden increase of thin fractions output has been observed, while crushing homogeneity has increased, process time reduced, and therefore, power consumption reduced also.
• SE single electrode
• Fig. 1 shows the influence of the sign-alternative frequency-modulated electrical potential on the mass part Q (%) of fractions of aluminium oxide having different particle size d (mm) .
• a material has been crushed in a laboratory cone-inertial crusher at invariable process time.
• Fig. 2 shows mass distribution Q/d of shungite particles grounded in a vibration mill against equivalent diameters d (micrometers) with the use of sign-alternative frequency- modulated electrical potential and without use.
• the material to be destroyed is put in a means for destruction, for example, a crusher, a mill, a runner, a disintegrator, whereupon sign-alternative frequency-modulated electrical potential is applied to said means.
• a means for destruction for example, a crusher, a mill, a runner, a disintegrator, whereupon sign-alternative frequency-modulated electrical potential is applied to said means.
• the processes of crushing and crumbling may be carried out in laboratory equipment or industrial equipment, variable electric fields may be created in a working space of said means .
• Generation techniques and processes of frequency modulation of electric potential, machinery engineering and safety engineering are discussed in detail in a technical literature available for a specialist in the art (see, e.g. Shevchenko A.O. "AutoSummary of Master's Thesis", S . Pb .
• the change of equipment output was estimated against time of predetermined size grade.
• Mechanical-chemical characteristics such as specific surface area, compression, chemical activity of cementing substances, were estimated by well known methods in the art (see, e.g. Figurovskiy N.A. "Segimentologichesky analys”, Ed. Rebinder P. ., Moscow- Leningrad, 1948, 332 p.p.; Butt U.M., Timashev V.V. "Practicheskie raboty po khimicheskoy technologii vayzhushchikh", Moscow, High School, 1973, 504 p) .
• a process of production of lime-siliceous cementing was examined in a ball mill in silicates-brick yard of joint- stock company "Buildmaterials", Belgorod, Russia. During the examination, mill operation under the usual regime and under the applied potential were compared. The applied potential was 9 V, carrier frequency of electric field was in range from 31 to 6700 Hz. The results were estimated against the time of cleaning of raw material bunker and lime crushing quality. Time estimation of bunker cleaning has shown that in the absence of potential the bunker was cleaned after 130 min, under the potential - after 105 min. Thus, the time change is 19.2 %.
• Table 1 Test 1 potential 9 V, carrier frequency 31-6700 Hz.
• Test 2 potential 75 V, carrier frequency 9-900 Hz

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Ceramic Engineering (AREA)
• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Food Science & Technology (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Organic Chemistry (AREA)
• Disintegrating Or Milling (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

Country Status (2)

Cited By (2)

• 1997
  • 1997-07-30 RU RU97112330/03A patent/RU2149687C1/ru not_active IP Right Cessation
• 1998
  • 1998-07-28 WO PCT/RU1998/000243 patent/WO1999006150A2/en not_active Application Discontinuation

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