US3565349A - Installation for pulverizing and drying crude quarry products - Google Patents

Installation for pulverizing and drying crude quarry products Download PDF

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Publication number
US3565349A
US3565349A US762181A US3565349DA US3565349A US 3565349 A US3565349 A US 3565349A US 762181 A US762181 A US 762181A US 3565349D A US3565349D A US 3565349DA US 3565349 A US3565349 A US 3565349A
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United States
Prior art keywords
separator
crusher
crushed materials
inlet
gases
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Expired - Lifetime
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US762181A
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English (en)
Inventor
Gerard Deynat
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CREUSOT FORGES ATELIERS
SOC DES FORGES ET ATEILERS DU CREUSOT
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CREUSOT FORGES ATELIERS
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    • 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

Definitions

  • Kelly Attorney-Cameron, Kerkam and Sutton ABSTRACT A pulverizing and drying installation in which hot gas is supplied in parallel to a breaking machine, a separator and a crusher, the gases from the breaking machine and the crusher being sent to the separator whence a single gas flow charged with pulverulent material is sent to a filter.
  • the invention relates to an installation for pulverizing and drying crude quarry products, using the hot gases coming from a furnace for treating pulverulent materials, more particularly an installation for crushing materials for cement manufacture; the outlet gases from the treatment furnace can also have been used for the preheating of the raw materials before their introduction into the furnace.
  • Crushing installations which mainly comprise a breaking machine, for instance of the impact type, a dynamic separator, and a crusher, for instance of the ball-and-drum type, the materials passing successively into the breaking machine and the crusher, if necessary with recycling of inadequately crushed materials.
  • hot gas flows coming from a single hearth, or from hearths associated with each apparatus flow through the apparatuses. From each apparatus therefore a gas flow escapes which entrains pulverulent materials, and the flows are received separately or regrouped in static separators from which the materials are extracted. Another portion of the materials is extracted from the base of the outer casing of the dynamic separator.
  • the invention obviates these disadvantages by sending a hot gas flow in parallel to the breaking machine, the dynamic separator, and the crusher, the gases emerging from the breaking machine and the crusher being then sent to the dynamic separator, whence a single gas flow charged with pulverulent materials is sent to the equipment for filtering and separating the materials.
  • FIG. 1 illustrates diagrammatically the operation of a complete installation for crushing raw materials for cement manufacture
  • H0. 2 is a detail of the construction of the dynamic se arator.
  • raw material having an approximate grain size of --25 mm. or more is taken from a storage silo 1 by a distributor 2 and introduced into a hammer-type breaking machine 3.
  • the broken up materials except for the portion already in the pulverulent state, are collected in an air lock 4 in the lower portion of the apparatus and sent from there to the base of an elevator 5.
  • the materials are poured out onto a screen 6 whose meshes allow elements having a grain size of 0-6 mm. to pass through, the refuse being collected at a place 7 and returned to the inlet of the breaking machine 3.
  • the fraction of the material which passes through the screen 6 is sent by a conveyor 8 to a dynamic separator 9.
  • the materials introduced into the dynamic separator are received on a centrifugal rotary plate 10 driven by a motor 11.
  • the heavy fractions collected at the baseof the dynamic separator in an air lock 12 are introduced into a single-chamber balltype crusher 13.
  • the materials leaving the crusher are collected in air lock 14, whence they are sent to the base of the elevator 5, where they are mixed with the materials coming from the breaking machine.
  • the hot gas flow coming from the treatment furnace or the preheater is entrained by a general fan l5 and, if necessary, extra heating is provided by a hearth 16.
  • Some of the gas flow is sent through ducting 17 to the impact-type breaking machine 3, through which it passes in counter current, entraining into outlet ducting 18 the finer portions of the material treated. Another portion of the gas flow is sent via ducting 19 to the ball-type crusher 13, whence it emerges at a place 20, entraining the finer portions of the material crushed. The majority of the hot gas flow is sent at a place 21 to the lower portion of the drying column of the dynamic separator 9. The dynamic separator 9 also receives at a place 22 the gas'flows which have passed through the braking machine and the crusher.
  • the fine materials separated by the separator 9 are entrained by the gas flow emerging at a place 23 and successively sent into a decanting tower 24 and an electric filter 25, whence they are extracted and evacuated on a conveyor 26.
  • Registers 27, 28 enable the relative amount of the gas flow to be regulated as between the breaking machine, the crusher and the dynamic separator.
  • Downstream of the fan 29, a conduit 30 having a register 3] enables the gas flow emerging from the electric filter to be recycled to the dynamic separator, while the rest of the gas flow is evacuated at a place 32 to the chimney.
  • a conduit 33 enables the gases coming from the fan 15 to pass directly to the filtering and separating group 24, 25 without passing through the crushing apparatuses when the latter are not in operation.
  • the installation is completed by a thermal regulating device which samples the temperature of the mixture of gases and pulverulent materials in the outlet ducting 23 for the gases from the dynamic separator, the device acting either on the auxiliary hearth or on the water atomization at the inlet to the breaking machine-3 or the decanting tower 24.
  • the dynamic separator is formed by a cylindrical member 40 through whose cover central feed ducting 41 extends.
  • a rotor 42 is suspended from the inside of the member 40 by a drive shaft 43 which extends through the central ducting and is connected to a drive motor 44.
  • the rotor R comprises a plate 45 and a portion 46 forming a centrifugal turbine.
  • a frustoconical element 47 defines at the base of the member 40 an annular compartment 48 in which gases fed via nozzles 49 are distributed; the gases then pass into the actual separator via an annular space 50.
  • the cylindrical member 40 is continued at its base by a conical portion 51, and then a cylindrical drying column 52 which terminates at its base in an evacuating pipe 53.
  • a lateral gas inlet 54 discharges into the column 52 via a grid 55 whose inclined blades form a screen to the passage of the solid materials into the conduit 54.
  • the solid materials of varying grain size are introduced into the ducting 41 from which they drop on to the rotary plate, which distributes them in the gases by centrifugal effect.
  • a first sizing is performed by gravity, while the turbine 46 performs a second centrifugal selection by hurling the heavier materials against the walls.
  • the materials encounter in the separator the gas flow distributed by the compartment 48 and the gas flow coming from the ducting 54. These two currents entrain the pulverulent materials upwards, while the dense materials drop back into the ducting 53, after having lost some of their humidity in contact with the hot flow. All the gas flows and the whole of the pulverulent materials in suspension are evacuated via a nozzle 56.
  • the dynamic separator is of a simpler construction than in the prior art types; more particularly, the separator has neither the prior art external separating chamber, nor the prior art-internal circulation turbine.
  • the result is that the useful section of the separator is increased, thus allowing the passage of a considerable gas flow capable of entraining all the fine materials to the filtering and separating group.
  • the whole installation has the advantage of a large section for the passage of the gases, and therefore a small load loss.
  • the amount of gas flow in the lower column of the separator, and its mixing, after contact with the material, with the gas flow distributed by the compartment 40, also improves the drying of the dense products, thus giving improved yield from the crusher receiving these products.
  • the installation described hereinbefore and embodied according to the invention enables the temperature regulation of the gases and materials to be simplified as a result of the regrouping of all the pulverulent materials in suspension in a single gas flow at the outlet from the dynamic separator.
  • the installation thus designed can also operate with variable flow, following the variations in flow of the furnace for treating the materials, If the flow is reduced, for instance, in relation to the nominal fiow of the installation, the breaking machine can be slightly opened while maintaining the same aperture in the grid of the screen 6, thus increasing the amount of materials recycled at the place 7.
  • the flow of the dynamic separator can also be kept constant by recycling via ducting 30.
  • the latter can have a motor whose speed can be slightly varied, so that the crusher can be operated at reduced speed, in relation to the reduced flow of the installation.
  • the raw materials coming from the silo could alternatively be introduced into the installation only at the base of the elevator, after the breaking machine, in which case the fine portions of the raw material would be immediately separated by the screen and sent to the separator, while only the refuse would be sent to the breaking machine for the first crushing.
  • An installation for pulverizing and drying crude quarried products utilizing the hot gases from a treatment furnace for the pulverized materials comprising a crusher, an upper inlet for the introduction of crude products into said crusher, a lower outlet in said crusher for crushed materials, a lower inlet in said crusher for the introduction of hot gases, an upper outlet in said crusher for removal of gases, a screen, a tube mill, an entry in said tube mill for crushed materials, an outlet from said tube mill for crushed materials, an inlet in said tube mill for hot gases, an outlet from said tube mill for gases, a dynamic separator, a lower chamber for said separator for the discharge of coarse crushed materials, a lower inlet in said separator for hot gases opening into said lower chamber, an intermediate inlet in said separator for hot gases, an upper inlet in said separator for crushed materials, an upper outlet in said separator for gases and crushed materials, separate conduits for feeding hot gases to said crusher, to said tube mill,
  • said dynamic separator comprising an external casing formed by an upper cylindrical portion, a lower cylindrical column portion of lesser diameter, said two portions being interconnected by an intermediate conical portion, a rotary plate forming a centrifuge and disposed in said upper cylindrical portion of said casing, a motor for driving said rotary plate, a device for introducing the materials on to said rotary plate, at least one gas inlet disposed in said conical portion of said casing, a gas inlet so disposed in said lower cylindrical column portion as to direct the gas flow upwards, and an air lock for evacuating the granular materials in the lower portion of said separator.
  • said means for supplying to said screen the crushed materials leaving said crusher and said means for supplying to said screen the crushed materials leaving said tube mill including a common elevator means discharging onto said screen.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Disintegrating Or Milling (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Crushing And Grinding (AREA)
US762181A 1968-05-10 1968-09-16 Installation for pulverizing and drying crude quarry products Expired - Lifetime US3565349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR151407 1968-05-10

Publications (1)

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US3565349A true US3565349A (en) 1971-02-23

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US (1) US3565349A (es)
BE (1) BE731345A (es)
DE (2) DE1920681A1 (es)
ES (1) ES366793A1 (es)
FR (1) FR1585405A (es)
GB (1) GB1233985A (es)
RO (1) RO55523A (es)
YU (1) YU32011B (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854666A (en) * 1973-01-29 1974-12-17 Gilbert Associates Process for pulverizing coal to ultrafine size
US4518123A (en) * 1983-02-02 1985-05-21 Kobe Steel, Limited Method for controlling the pulverization and dryness of flammable materials passing through a pulverizer, and method of controlling the pulverizing rate of the pulverizer
WO2008055495A3 (de) * 2006-11-10 2009-01-22 Calcarb Ag Verfahren zur herstellung feiner mineralischer pulverprodukte
CN105618186A (zh) * 2016-01-21 2016-06-01 金思思 一种茶叶研磨装置
CN109909051A (zh) * 2019-03-12 2019-06-21 安徽海螺集团有限责任公司 一种水泥工厂原料磨系统窑系统控制方法
CN117181399A (zh) * 2023-09-05 2023-12-08 江苏勃仑化学有限公司 一种用于雕白块的粉碎加工装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3230824C2 (de) * 1982-08-19 1985-03-14 O & K Orenstein & Koppel Ag, 1000 Berlin Mahltrocknungsanlage mit Vorzerkleinerung
CN106944230B (zh) * 2017-04-07 2022-06-03 北京东方燕京工程技术有限责任公司 可调节的磨矿工艺
CN113492045B (zh) * 2021-09-10 2021-11-19 徐州艾博生物科技有限公司 一种水溶性银杏叶提取物生产用粉碎设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1729424A (en) * 1924-02-09 1929-09-24 Harshaw Chem Corp Method of and mechanism for drying materials
US1748920A (en) * 1928-02-23 1930-02-25 Allis Chalmers Mfg Co Process of and apparatus for comminuting material
US2274789A (en) * 1939-07-27 1942-03-03 Corn Prod Refining Co Production of dextrine
US3329353A (en) * 1963-07-24 1967-07-04 Smidth & Co As F L Crushing and grinding plant
US3397845A (en) * 1964-04-08 1968-08-20 Kloeckner Humboldt Deutz Ag Grinding mill plant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1729424A (en) * 1924-02-09 1929-09-24 Harshaw Chem Corp Method of and mechanism for drying materials
US1748920A (en) * 1928-02-23 1930-02-25 Allis Chalmers Mfg Co Process of and apparatus for comminuting material
US2274789A (en) * 1939-07-27 1942-03-03 Corn Prod Refining Co Production of dextrine
US3329353A (en) * 1963-07-24 1967-07-04 Smidth & Co As F L Crushing and grinding plant
US3397845A (en) * 1964-04-08 1968-08-20 Kloeckner Humboldt Deutz Ag Grinding mill plant

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854666A (en) * 1973-01-29 1974-12-17 Gilbert Associates Process for pulverizing coal to ultrafine size
US4518123A (en) * 1983-02-02 1985-05-21 Kobe Steel, Limited Method for controlling the pulverization and dryness of flammable materials passing through a pulverizer, and method of controlling the pulverizing rate of the pulverizer
WO2008055495A3 (de) * 2006-11-10 2009-01-22 Calcarb Ag Verfahren zur herstellung feiner mineralischer pulverprodukte
US20100294863A1 (en) * 2006-11-10 2010-11-25 Ulrich Schindler Method for Manufacturing Fine Mineral Powder Products
US8393557B2 (en) 2006-11-10 2013-03-12 Omya Development Ag Method for manufacturing fine mineral powder products
CN105618186A (zh) * 2016-01-21 2016-06-01 金思思 一种茶叶研磨装置
CN105618186B (zh) * 2016-01-21 2018-05-04 海门名驰工业设计有限公司 一种茶叶研磨装置
CN109909051A (zh) * 2019-03-12 2019-06-21 安徽海螺集团有限责任公司 一种水泥工厂原料磨系统窑系统控制方法
CN117181399A (zh) * 2023-09-05 2023-12-08 江苏勃仑化学有限公司 一种用于雕白块的粉碎加工装置

Also Published As

Publication number Publication date
BE731345A (es) 1969-09-15
DE6916365U (de) 1973-04-05
YU32011B (en) 1974-02-28
GB1233985A (es) 1971-06-03
DE1920681A1 (de) 1970-11-19
FR1585405A (es) 1970-01-23
RO55523A (es) 1973-08-20
ES366793A1 (es) 1971-03-16
YU92969A (en) 1973-08-31

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