US3738785A - Apparatus for processing of finely divided particulate materials - Google Patents

Apparatus for processing of finely divided particulate materials Download PDF

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Publication number
US3738785A
US3738785A US00874654A US3738785DA US3738785A US 3738785 A US3738785 A US 3738785A US 00874654 A US00874654 A US 00874654A US 3738785D A US3738785D A US 3738785DA US 3738785 A US3738785 A US 3738785A
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United States
Prior art keywords
roller
rollers
circumferential wall
gap
biasing
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Expired - Lifetime
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US00874654A
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English (en)
Inventor
H Reinhardt
B Brandt
A Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DEUTSCHE GOLD U SILBER SCHEIDEANSTALT DT
Evonik Operations GmbH
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Degussa GmbH
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Priority claimed from DE19681807714 external-priority patent/DE1807714C/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/22—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/16—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
    • B30B11/165—Roll constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/18—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using profiled rollers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/28—Compounds of silicon
    • C09C1/30—Silicic acid
    • C09C1/3009—Physical treatment, e.g. grinding; treatment with ultrasonic vibrations
    • C09C1/3036—Agglomeration, granulation, pelleting
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C09C3/045—Agglomeration, granulation, pelleting
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C09C3/046—Densifying, degassing, packaging
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/50—Agglomerated particles
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/812—Venting

Definitions

  • Two rollers are arranged for rotation in the chamber in axial parallelism with one another and define with each other a narrow longitudinally extending gap.
  • At least one of the rollers has a circumferential wall composed of gas-permeable porous material.
  • This one NOV. 8 P roller is hollow and arranged to communicate a source of underpressure so that, as the roller rotates, [52] CL 425/85 162/297 125/224, the particulate material is attracted onto its outer sur- 425/363, 425/455 [51] Int.
  • a method of processing the particulate material, and a roller for use in the apparatus are also disclosed.
  • finely divided particulate material such as pulverulent or finecrystalline and organic materials
  • processing of finely divided particulate material frequently depends upon the possibility of increasing the volumetric weight of such materials without destroying or adversely influencing their specific characteristics which depend upon the fine division of such materials.
  • highly dispersed surface-active filler materials such as silicon oxide, carbon black, aluminum oxide, aluminum silicates and calcium silicates, all materials which are used in very large quantities in various industries.
  • a further approach which has been tried is to deposit the material to be compacted onto hollow rollers, socalled filter rollers, whose circumferential wall is gaspermeable and whose interior is subjected to underpressure. The gas is thereby withdrawn from the deposited material and the material is supplied by the filter rollers to the compacting gap between a pair of pressure rollers.
  • Various modifications have been proposed for this basic approach but in each case the gap between the pressure rollers-in which the material is subjected to compactionis fixed. This approach is limited in its applicability because it permits only the production of compressed blanks, as the compacted bodies made from the compacted finely divided particulate materials will hereafter be called for the sake of convenience, without specific form and only within a rather broad range of grain sizes.
  • a further disadvantage is that the compacted blanks obtained in this manner have a widely varying breaking resistance, a fact which is of particular disadvantage if the compacted blanks are of filler material which is intended for certain applications, for instance for use in rubber mixtures, because with the mixing procedure used in the production of rubber mixtures the compacted blankS can be broken down only partially to the original grain size. The result of this is an inadequate dispersal of the filler material and the resulting typical formation of pockets and cavities in the vulcanized goods.
  • a more particular object of the invention is to provide a method of processing finely divided particulate materials which is not subject to the disadvantages outlined before.
  • a concomitant object of the invention is to provide such a method which enables continuous operation and the production of compacted blanks of specific desired shape and size with a defined narrow range of breaking resistance and increased bulk weight.
  • An additional object of the invention is to provide an apparatus for carrying out the method.
  • Still a further object of the invention is to provide a roller construction for use in such apparatus.
  • one feature of the invention resides in the novel method which, briefly stated, comprises confining a mass of finely divided material adjacent the gas-permeable circumferential wall of a rotatable roller having a hollow interior.
  • the roller is thereupon rotated and subjected in its interior to underpressure so as to attract the material by suction to the exterior of the circumferential wall of the roller for forming a continuous layer of the material thereon.
  • Another roller is rotated in axial parallelism with the rotatable roller and with such a spacing from the exterior of the same as to define with the latter a gap wherein the layer is subjected to compacting.
  • the roller having the gas-permeable circumferential wall may rotate partially or completely in the material to be compacted, and the same is true of the other roller.
  • the thickness of the layer may be maintained constant by removing excess attracted material from the layer before increments of the layer enter into the gap between the two rollers.
  • one of the two rollers is biassed towards the other with a biassing force which is preferably maintained at constant level.
  • the other roller may also be a filter roller or it may be a roller having a known gasimpermeable circumferential wall.
  • the layer is compacted on passage of the gap between the two rollers so as to be reduced by at least one half of its original volume and is deformedby profiling provided on the circumferential wall of at least one of the rollers-into compacted blanks of desired shape and configuration and defined range of breaking strength.
  • the dwell time of the material of the layer that is of the material of which each successive increment of the layer is composed which enters into the gap between the two rollers, be below approximately 5 seconds, a time value which of course depends upon the roller circumference and the speed of rotation of the rollers.
  • two rollers be provided having a gas-permeable or porous circumferential wall, or that even two rollers of the same type be rotated oppositely one another.
  • one of the two rollers has a profiled surface of circumferential wall.
  • compacted blanks of certain configuration are obtained, for instance granules, little rods, tablets and the like.
  • the profile is half-moon shaped, then the compacted blanks will be similarly configurated.
  • These compacted blanks may then be reduced to the desired dimensions in a cutting device of known construction, for instance in a so-called rotary disc breaker. Because of the profiling on at least one of the rollers, at least two dimensions of the resulting product are already established before the cutting device acts upon the compacted blanks.
  • FIG. 1 is a partially sectioned diagrammatic perspective view of an apparatus according to the present invention.
  • FIG. 2 is a partly sectioned somewhat diagrammatic perspective view illustrating one embodiment of a roller according to the present invention for use in the apparatus of FIG. 1.
  • the apparatus comprises a housing 1 having two transversely spaced walls la.
  • a filter roller 2 for instance of the type which will be discussed more specifically with reference to FIG. 2.
  • the roller 2 is hollow, and arranged for rotation in axial parallelism with the roller 2 is the roller 3 rotating in the direction opposite to the roller 2, as indicated by the arrows respectively associated with the two rollers.
  • the circumferential wall of the roller 3 is not gas-permeable, and the roller 3 is therefore not designated as a filter roller as is the case with the roller 2. Instead, the circumferential wall of the roller 3 is provided on its exterior with a half-moon shaped longitudinal profile 4, shown in cross-section.
  • the dimensions of the housing 1 are so selected that the spacing between the filter roller 2 and the housing walls 1 in direction normal to the longitudinal axis of the filter roller 2 is substantially greater than the gap between the rollers 2 and
  • the shaft 15 about which the filter roller 2 rotates is hollow and a suitable source of underpressure may be connected with it in order to obtain underpressure in the interior of the filter roller 2.
  • a measuring transducer 13a and a PI regulator 13b which is coupled with an indicator device 13c, permit regulation of the value of underpressure applied to the interior of the filter roller 2, via a valve l3e.
  • Biassing devices 7, which here are illustrated as being of hydraulic type but which could be mechanically or pneumatically operated, act upon the bearings 9 and bear upon a support structure 8 which is located exteriorly of the wall In of the hOusing 1.
  • a hydraulic pump 12a provides the necessary biassing force whose value is registered on the indicators 12b. If a pressure increase takes place in the system as a result of changes in the size of the gap between the rollers 2 and 3, caused by increased thickness of the layer of material as it enters the gap or by other factors, the increased pressure can yield and fluid escapes into the two reservoir bulbs which are provided.
  • Two pressure relief valves 12d are provided intermediate the reservoirs 12c and the biassing devices 7 in order to assure that the applied isodynamic pressure is so reduced only after it reaches a certain level. If the manually operated hydraulic pump 12a is replaced with an electrically operated pump, then a maximum-minimum or limit switch He must be provided for effectinG automatic regulation of the desired biassing pressure.
  • a hopper 14 communicates with the interior space 5 in the housing 1 for introducing into the space 5 the finely divided particulate material which is to be compacted.
  • the particulate material is attracted to the outer surface of the circumferential wall of the filter roller 2 to form a layer thereon which then passes into and through the gap between the rollers 2 and 3. It is desirable to provide an adjustable and shiftable doctor blade 10 above the filter roller 2 for removing material from the attracted layer in excess of a predetermined thickness, in order to provide for as much thickness equalization of the attracted layer as possible before the same enters into the gap between the rollers 2 and 3.
  • the compacted material having the configuration imparted to it by the profiling 4, falls out of the gap between the rollers 2 and 3, and downstream of the gap it is cut to desired lengths by the cutting device provided, here illustrated as a known disc breaker or rotary disc breaker 11.
  • FIG. 2 illustrates a specific embodiment of a filter roller for use in the apparatus according to the present invention.
  • Reference numeral identifies the hollow shaft a portion of which is provided with bores 15a.
  • the wall 16 is fluid-tightly connected with the end walls 17, for instance by welding, and in the same manner the walls 17 may be connected with the shaft 15. 7
  • an outer circumferential wall composed of a plurality of plates 18 of sintered material, for instance metallic sintered material, synthetic plastic sintered material or ceramic sintered material. These plates 18 abut one another and, insofar as they are composed of weldable material, are welded to the inner circumferential wall 16 as well as to one another where they abut. However, screw means may also be provided for securing the blades 18 to the inner circumferential wall 16.
  • the inner circumferential wall 16 is provided with interior radial reinforcing ribs 19 for increasing the strength and stability of the roller, but helically convoluted ribs or axially extending ribs may also be pr0- vided, or any combination of the three.
  • Reference numeral 20 identifies the inlet opening of the hollow shaft 15 at which underpressure may be applied.
  • the level of this isodynamic pressure depends in each individual case upon the particulate material to be compacted, its moisture content and the degree of compacting which is desired.
  • the moisture content is for instance desirably not below 1 percent.
  • the optimum break resistance of the compacted blanks made from a given particulate material depends upon the intended use and can readily be determined by empirical means. For instance, it has been found that SiO granulates produced in accordance with the present invention have adequate transport stability and maximum dispersion characteristics in-a test rubber mixture if a break resistance to pressure between 100 and 500 pond (p) is obtained in the compacted blanks, measured with the hardness tester'according to German Auslegeschrift l 374 254.
  • breaking I dwell time in the gap 6' pressure is intended to mean the pressure in ponds which is necessary to abruptly destroy a granulate of 2 3 mm grain size.
  • the dispersion characteristics of SiO compacted blanks made in accordance with the present invention may for instance be determined in a test mixture colored with ferrous oxide red.
  • the test mixture is introduced into a mixer of the internal type and under identical circumstances one bath of test mixture has admixed therewith silicium dioxide granulate made according to the present invention whereas another batch has admixed therewith for comparison purposes a silicium dioxide powder.
  • a simple optical comparison indicates if and to what extent dispersion has been improved. It has been found, surprisingly, that if the breaking pressure of the compacted silicium dioxide blanks is set to between 200 and 250 ponds, the dispersion in the test mixture is substantially better than in the test mixture to which the silicium dioxide powder was added.
  • the original finely divided particulate material is a SiO, powder with primary particle sizes smaller than 50 p. and with a bulk weight of approximately g/l
  • a SiO granulate according to the present invention and having breaking pressure values between 200 and 250 ponds may be produced under approximately the following circumstances:
  • roller pressure approximately l-6 mm, up to approximately 4 mm play in direction normal to the roller axes approximately 0.0l-0.l sec.
  • a finished granulate with approximately the following screen analysis is obtained by breaking the rod-shaped Si0 compacted blanks falling out of the gap between the rollers in a conventional rotary disc breaker and subjecting them subsequently to screen removal of the fines smaller than 0.5 mm;
  • the identifiably shaped granulate quantity amounts to 65 percent, that is the total of the fractions 3 mm and 2 3 mm.
  • the pores of the material of which the outer circumferential wall of the filter roller is composed be so dimensioned that at a predetermined operational load of the suction device an underpressure of constant value in the interior of the filter roller, irrespective of whether the filter roller is partly or completely immersed in the material to be compacted.
  • a rotary disc breaker is arranged below the gap between the rollers 2 and 3, then it is advantageous that the cutting edges of the rotary discs of the breaker extend in planes transversely to the elongation of the gap. This is particularly advantageous if the apparatus according to the present invention produces compacted blanks in profiling which extends longitudinally of the rollers.
  • the material for the porous outer circumferential wall of the filter roller is a suitable sinter material, such as sinter metal, sinter synthetic plastic or sintered ceramic. It is of course not necessary that the outer circumferential wall consist of the plate-shaped portions illustrated in FIG. 2, but this enhances the stability.
  • the spacing of the filter roller from the bottom wall of the housing I be at least equal to half the roller diameter, and that the lateral spacing between the sinter roller and the housing wall be equal to at least one roller diameter.
  • the doctor blade mentioned before may be adjustably mounted so as to movable towards and away from the circumferential wall of the filter roller, and it may also be so mounted that its angle with respect to the circumferential wall can be adjusted.
  • the pores of the porous material of the outer circumferential wall of the filter roller may have a diameter of approximately 0 200 IL, preferably between 0 35 u.
  • the thickness of the outer circumferential wall should be at least approximately 1 mm.
  • At underpressures of 0.01 1.0 kg/cm the gas permeability of the outer circumferential wall of the filter roller may be in the regionbetween approximately 0.1 and 7 m /cm X h.
  • the roller according to the present invention for utilization in the apparatus according to the present invention, has certain very definite advantages over the rollers used in known apparatus, namely a long life irrespective of whether it is rotated at low or high rotational speeds, resistance to much higher pressure than are possible with the known constructions, and retention of its shape, that is resistance to being deformed so it is out-of-round in cross-section.
  • EXAMPLE 1 In an apparatus according to FIGS. 1 and 2 compacted blanks of highly dispersed surface active silicium dioxide were produced.
  • the starting material obtained by precipitation from an aqueous silicate solution, had the following characteristics:
  • the apparatus utilized an isodynamically biassed filter roller and a non-adjusted rotatable rotatable nongas permeable counter roller having half-moon shaped longitudinal profiling. Both rollers were 300 mm long and had a diameter of 100 mm. The outer circumferential wall of the filter roller was 5 mm thick and consisted of sinter metal Siperm R" (Remanit) having a maximum pore width of 35 t. The profile of the counter roller had the dimensions 6 X 2 mm. Arranged below the gap between these rollers was a rotary disc type breaker with a spacing between the disc of 3 mm.
  • the housing Prior to operation of the device the housing was filled via the hopper to approximately two-thirds with the pulverulent material to be compacted, a roller pressure of 0.35 t/cm was set and an underpressure of 0.6 kg/cm was applied to the filter roller.
  • the doctor blade arranged above the filter roller was set at a distance of 15 mm from the circumferential wall of the filter roller. Thereupon, both rollers and the disc type breaker were simultaneously started. The rotation of the rollers was so regulated that the medium dwell time of the material to be compacted in the gap between the rollers was approximately 0.15 sec. The width of the gap was approximately 1 mm.
  • the breaking pressure of the compacted blanks was between 200 and 250 pond.
  • the granulate portion having an identifiable shape corresponded to 62.6% of the total.
  • the dispersion ability of the granulates was tested in a red colored test rubber mixture free of vulcanizing additives.
  • a 'Brabender-Plastograph was used as disper- SIOII apparatus.
  • the granulate dispersion in the test mixture produced in accordance with Example 1 was significantly poorer than that of the test mixture utilizing the purverulent starting material. It was a particular'disadvantage that the fines 0.5 mm obtained on classification in the range between 0.5 5 mm was 50 percent after the first compacting,
  • a second roller mounted in said housing for rotation in axial parallelism with said first roller spaced from and defining with the same an axially extending gap of a predetermined minimum width exceeding zero, one of said rollers being movable away from the otherroller transversely of said gap so that the latter may increase in width; biasing means for yieldably biasing said one roller to- 'wards the other transversely of said gap with a biasing force of constant value under all operating conditions; and suction means communicating with the interior of said first roller for exerting through said gas-permeable circumferential wall thereof a suction effect on said material to thereby effect deposition of said material on said wall in form of a layer for subsequent compacting in response to passage of increments of said layer through said gap.
  • said housing having a pair of spaced walls located at opposite sides of and each extending in at least substantial axial parallelism with said rollers; and wherein the smallest distance between said circumferential wall of at least said first roller and the associated wall is at least three times greater than the width of said gap.
  • each of said rollers having an outer circumferential surface, and wherein at least one of said surfaces comprises profilmg.
  • said first roller having a predetermined diameter, and said smallest distance being at least equal to said predetermined diameter.
  • Apparatus as defined in claim 1 further comprising a doctor blade extending along the exterior of said circumferential wall in axial parallelism with said first roller; and mounting means mounting said doctor blade adjustably for movement towards and away from said prising journalling means mounting said first roller rotatably and for adjusting movement toward and away from said second roller.
  • said biasing means comprising a fluid-operated biasing device.
  • said second roller having a longitudinally profiled outer surface; said first roller and comprising journalling means journalling said first roller rotatably and for movement towards and away from said second roller; and said biasing device biasing said first roller toward said second roller.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Glanulating (AREA)
  • Press Drives And Press Lines (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
US00874654A 1968-11-08 1969-11-06 Apparatus for processing of finely divided particulate materials Expired - Lifetime US3738785A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681807714 DE1807714C (de) 1968-11-08 Verfahren und Vorrichtung zum kontinuierlichen Vorverdichten sowie gleichzeitigen Formen von feinteiligen Stoffen

Publications (1)

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US3738785A true US3738785A (en) 1973-06-12

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US00874654A Expired - Lifetime US3738785A (en) 1968-11-08 1969-11-06 Apparatus for processing of finely divided particulate materials
US00161791A Expired - Lifetime US3742566A (en) 1968-11-08 1971-07-12 Processing of finely divided particulate materials
US00161790A Expired - Lifetime US3762851A (en) 1968-11-08 1971-07-12 Processing of finely divided particulate materials
US203332A Expired - Lifetime US3860682A (en) 1968-11-08 1971-11-30 Processing of finely divided particulate materials

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US00161791A Expired - Lifetime US3742566A (en) 1968-11-08 1971-07-12 Processing of finely divided particulate materials
US00161790A Expired - Lifetime US3762851A (en) 1968-11-08 1971-07-12 Processing of finely divided particulate materials
US203332A Expired - Lifetime US3860682A (en) 1968-11-08 1971-11-30 Processing of finely divided particulate materials

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US (4) US3738785A (de)
JP (1) JPS5111344B1 (de)
CH (1) CH497224A (de)
DE (1) DE1807714C2 (de)
ES (3) ES372366A1 (de)
FR (1) FR2024818A1 (de)
GB (1) GB1294338A (de)
NL (1) NL163433C (de)

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US3833327A (en) * 1971-10-22 1974-09-03 Hutt Gmbh Method of and apparatus for removing wood particles yielded in chipboard production
US4807819A (en) * 1984-08-30 1989-02-28 Degussa Aktiengesellschaft Process and apparatus for granulating powdery materials
US5353999A (en) * 1993-02-16 1994-10-11 Ppg Industries, Inc. Particulate amorphous precipitated silica
WO1995025585A1 (en) * 1994-03-21 1995-09-28 Technological Resources Pty. Limited A process for producing agglomerates
US5659973A (en) * 1992-12-30 1997-08-26 American National Can Co. Device and method for removing liquid on a gauze conveyor
AU704350B2 (en) * 1994-03-21 1999-04-22 Pasminco Limited A process for producing agglomerates
GB2423131A (en) * 2005-02-09 2006-08-16 Howard Ramsden Pelletiser roll shell with detachable outer portion
WO2007128349A1 (en) * 2006-05-10 2007-11-15 Evonik Degussa Gmbh Use of roll compacted pyrogenically produced silicon dioxide in pharmaceutical compositions
WO2007128350A1 (en) * 2006-05-10 2007-11-15 Evonik Degussa Gmbh Use of roll compacted pyrogenically produced silicon dioxide in pharmaceutical compositions
US20080279748A1 (en) * 2004-06-04 2008-11-13 Peter Adler Silicon and Method for Producing the Same
US20100178509A1 (en) * 2007-07-06 2010-07-15 Evonik Degussa Gmbh Silica glass granule
US20100183495A1 (en) * 2007-07-06 2010-07-22 Evonik Degussa Gmbh Process for preparing high-purity silicon dioxide granule
US20110139583A1 (en) * 2009-12-15 2011-06-16 Exxonmobil Research And Engineering Company Active solids supply system and method for supplying solids
ITMI20100046A1 (it) * 2010-01-19 2011-07-20 Unimer Spa Procedimento industriale idoneo ad ottenere la conformazione scagliettata di fertilizzanti mangimi ed ogni qualsivoglia prodotto a partire da un procedimento preliminare di pellettatura
EP2468104A1 (de) * 2010-12-23 2012-06-27 CFS Bakel B.V. Formtrommel und Reinigungsvorrichtung für eine Formtrommel
US20170218170A1 (en) * 2014-08-05 2017-08-03 Sumitomo Rubber Industries, Ltd. Rubber composition and tire
US10182575B2 (en) 2013-02-01 2019-01-22 Gea Food Solutions Bakel B.V. Food forming concept
US11377564B2 (en) 2017-02-27 2022-07-05 Wacker Chemie Ag Method for producing hydrophobic silica granules
US12004519B2 (en) 2013-02-01 2024-06-11 Gea Food Solutions Bakel B.V. Food forming concept

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US10182575B2 (en) 2013-02-01 2019-01-22 Gea Food Solutions Bakel B.V. Food forming concept
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ES196249Y (es) 1975-08-01
ES372366A1 (es) 1972-03-16
DE1807714C2 (de) 1971-01-04
US3860682A (en) 1975-01-14
US3762851A (en) 1973-10-02
ES196249U (es) 1975-03-01
DE1807714B1 (de) 1970-06-18
GB1294338A (en) 1972-10-25
FR2024818A1 (de) 1970-09-04
ES395483A1 (es) 1974-11-01
CH497224A (de) 1970-10-15
JPS5111344B1 (de) 1976-04-10
US3742566A (en) 1973-07-03
NL163433C (nl) 1980-09-15
NL163433B (nl) 1980-04-15
NL6915288A (de) 1970-05-12

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