US3890089A - Homogeneous fusion system and method - Google Patents

Homogeneous fusion system and method Download PDF

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Publication number
US3890089A
US3890089A US407094A US40709473A US3890089A US 3890089 A US3890089 A US 3890089A US 407094 A US407094 A US 407094A US 40709473 A US40709473 A US 40709473A US 3890089 A US3890089 A US 3890089A
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United States
Prior art keywords
heating
holding means
fused
holding
cooling
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Expired - Lifetime
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US407094A
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English (en)
Inventor
Charles K Matocha
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.)
Howmet Aerospace Inc
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Aluminum Company of America
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Filing date
Publication date
Application filed by Aluminum Company of America filed Critical Aluminum Company of America
Priority to US407094A priority Critical patent/US3890089A/en
Priority to AU73576/74A priority patent/AU477436B2/en
Priority to CA210,558A priority patent/CA1030440A/fr
Priority to GB4418174A priority patent/GB1471703A/en
Priority to DE2449829A priority patent/DE2449829C3/de
Priority to FR7435016A priority patent/FR2248479B1/fr
Priority to JP11982474A priority patent/JPS5317914B2/ja
Application granted granted Critical
Publication of US3890089A publication Critical patent/US3890089A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/44—Sample treatment involving radiation, e.g. heat
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/2202—Preparing specimens therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G01N2001/2866—Grinding or homogeneising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence

Definitions

  • ABSTRACT A fusion system is provided whereby material in comminuted form or the like may be automatically fused under conditions which provide a homogeneously fused sample which then may be analyzed by analytical techniques to determine content of the material.
  • the apparatus for carrying out the fusion provides control of the initial heating time, fusion time, and cooling time, as well as controlling the mixing or blending of the sample material during the fusion to ensure the homogenuity of the mixture 10 Claims, 6 Drawing Figures ROTATION MOTOR CONTROL TILT MECHANISM MECHANISM All? Alf? INLET 64S QAS j 740 INLET COMPRESSED All? VALVE PATENTEDJUN 1 7 ms AIR :2
  • This invention relates to a system for automatically producing homogeneous fused materials suitable for use in analytical equipment.
  • Preparation of mixtures of materials for analysis including both metallic and non-metallic samples can be made in a variety of ways.
  • An approach has been to pulverize materials such as ores, slags,-or the like.
  • the pulverized materials are then analyzed using various techniques such as, for example, x-ray fluorescence or the like.
  • fused sam ple it has thus become preferable to prepare a fused sam ple. If the materials are properly mixed together during the fusion, the resulting fused sample is homogeneous. The fused sample can then be ground or used directly in tablet form and, in either event, is permanently hmogeneous. Other materials such as internal standards or the like can be added to the mixture prior to the fusion and, then upon fusion. will become homogeneously mixed throughout the sample.
  • apparatus for the preparation of homogeneously fused material comprising means for holding the material to be fused and means for heating the material for a preselected time at a temperature below the fusion tempera- LII ture to expel, for example, entrapped air and low temperature volatiles; means for heating the material to fusion temperature for a predetermined period of time; means for rotating the material during heating; means for tilting the material during fusion to a predetermined angle; and means for cooling the fused material after the cessation of heating.
  • the tilting and rotating of the material are controlled so that the material can be independently tilted or rotated; the material may be constantly rotated while at an angle; or the material may be rotated while being simultaneously moved back and forth between a vertical position and a tilted position.
  • Each of the periods of heating, rotating, tilting, and cooling may be variably timed to obtain the optimum respective periods to thereby provide the desired homogeneous fusion.
  • FIG. 1 is an isometric view of the apparatus.
  • FIG. 2 is a diagrammatic chart functionally illustrating the apparatus.
  • FIG. 3 is a fragmentary isometric view of a portion of the apparatus.
  • FIGv 4 is a fragmentary isometric view similar to FIG. 2 showing the same apparatus in a different position.
  • FIG. 5 is a schematic of the programmed electrical control circuitry for the apparatus.
  • FIG. 6 is an electrical schematic of certain components ofthe apparatus which electrically interface with the electrical control circuitry in FIG. 5.
  • FIGS. 1 and 2 the apparatus of the invention is shown generally at 2, comprising a case 4 having a front control panel 6 containing a number of controls which will be described in more detail below.
  • a tiltable platform portion I0 has mounted thereon a burner 20 such as a Fisher-Meker burner or the like.
  • Burner 20 is rotatably mounted on platform via a rotatable union 22 which is appropriately journaled through platform 10.
  • Devices of this kind are commercially available and are well known to those skilled in the art.
  • Rotation of burner 20 is provided by a motor 30 which, in the illustrated embodiment, is connected to burner 20 via a chain drive 32 which drives a sprocket at 34 mounted to an extension of burner 20 coupled to union 22.
  • the sample to be fused is placed in a crucible and covered by a lid 41.
  • Crucible 40 in turn. is retained by a clamp or support 42 which may conveniently comprise any suitable supporting means such as a circular clamp, three-dimensional or three-pronged, or the like.
  • Lid 4] is retained in place by a clamp 43.
  • Clamps 42 and 43 are supported by a bar 44 which is, in turn, mounted to the bottom portion of the burner to allow the entire mechanism to rotate together.
  • platform 10 may be tilted to a position of, for example, about 30 from the horizontal by an air cylinder coupled to platform 10 at 52.
  • Platform 10 is pivoted at 12 to permit the tilting of the platform via movement of air cylinder 50.
  • Ignition of burner 20 is provided by an ignition mech anism 60 which provides an electrode 62 which terminates at a point adjacent the outlet of the burner.
  • the burner is grounded to provide, together with electrode 62. the terminals of a spark gap through which a spark passes to ensure ignition of the gas.
  • the electrical connection of the ignition control 60 with electrode 62 is accomplished via a wiper ring 64 electrically isolated. but mechanically mounted to the burner which permits the electrode 62 to rotate with burner 20.
  • Compressed air for air cylinder tilting mechanism 50 is provided from a pressure regulated source adjusted to provide a sufficiently low pressure to permit a damped or gradual movement of the piston within the air cylinder.
  • Control of the air flow to the air cylinder tilting mechanism is provided by a solenoid valve 70.
  • control of the flow of air and gas to burner 20 is provided respectively by control devices 72 and 74.
  • Air control device 72 and gas control device 74 each have two separate solenoid valves 72a. 72b and 74a and 74b controlling parallel paths and which are separately controlled to permit a low or high rate of flow through the device depending upon whether only one or both of the solenoid valves are energized.
  • the temperature of the burner during either the low heat or fusion heat cycles is determined by the respective volumes of gas and air passed through the respective valves by varying either the pressures at gas pressure regulator 79 and air pressure regulator 78 or the needle valves (not shown) associated with the respective solenoid valves.
  • the ignition. rotation. tilting. and combustion are all controlled by an electrical control circuit mechanism 80.
  • This mechanism comprises timing and control means which may be electrical or mechanical.
  • mechanism 80 comprises a se ries of solid state timers and electrical relays (which will be described in more detail) permitting one to program the rotation. tilting. initial heating. fusion. and cooling of the fused material.
  • Control mechanism 80 is designed to permit one to interconnect the terminals to a plurality of such fusion units or apparatus containing the various valves and rotation. ignition. and tilting mechanisms to permit a number of fusion samples to be prepared simultaneously using the same programming and electrical controls.
  • Such units which might be designated slave fusion units. would be very similar to that which has just been described except for the omission of control mechanism 80 including the controls shown on the front panel of the apparatus of FIG. 1 at 6.
  • FIGS. 3 and 4. the apparatus is shown with platform positioned horizontally in FIG. 3 to place burner in a vertical position and in a tilted position in FIG. 4.
  • Initial rotation of burner 21) and crucible in the tilted position permits the fusible material therein to lap the wall of crucible 40 thus picking up or incorporating any powdered granular or globules of sample material which may stick to the sidewalls ofthc crucible.
  • the rotation of burner 20 can be accomplished in the vertical position as well as the tilted position and. furthermore. that the rotation may be maintained while imparting a rocking motion to burner 20 and platform It) by alternatively tilting platform It) to the tilted position shown in FIG.
  • the rotation and tilting provide a means for automatically mixing the fused materials as they are fused. This type of mixing, as discussed above. was previously accomplished manually. by removing a crucible. for example. from a furnace using tongs and then manually swirling the crucible. In accordance with the invention, however. it is possible to maintain this mixing and swirling during the actual application of heat. Thus, the fused material does not cool during the swirling action.
  • the heat optionally is shut off and the platform 10 is returned to a horizontal position.
  • a short additional heating period is available after swirling action has ceased to ensure that the melt settles in the bottom of the crucible to avert any solidification on the wall and to obtain the desired solidified bead.
  • the rotation of the crucible preferably continues until a predetermined position is reached.
  • both solenoid valves of air control device 72 are permitted to reopen to provide cooling air through burner 20 to crucible 40. This greatly assists in obtaining more rapid cooling of the sample to permit removal of the sample from the apparatus in a shorter period of time. thus allowing one to commence preparation of subsequent samples. Alternatively only one of the solenoid valves could be opened if desired.
  • FIG. 5 schematically illustrates the control mechanism 80 in FIG. 2 while FIG. 6 schematically illustrates the components in FIG. 2 energized by control mechanism 80.
  • Control mechanism 80 in the illustrated embodiment in FIG. 5 comprises a series of relays and timers which program the entire sequential fusion steps of the apparatus.
  • the circuitry of FIGS. 5 and 6 are interconnected by terminals 2000-22011 and 200b-220h respectively.
  • the combined circuitry of FIGS. 5 and 6 as shown in FIG. 2 comprises an independent or master unit as will be described further below.
  • Power holding relay I02 includes an electrical holding circuit through terminals 102a in the drawing.
  • Heating relay 106 has a mechanical latch mechanism which is latched by energization of coil 106a and unlatched by coil 10611.
  • Latching of relay I06 provides energizing signals to gas solenoid valve 74a and air solenoid valve 720 causing the solenoid valves to open.
  • the ignition circuit is also completed and the low heat cycle therefore commences. In addition to the expulsion of low temperature volatiles. or occluded gases. this low heat capabil ity of the apparatus is of particular interest when a low heat roasting is desired, for example. when a sample is mixed with an oxidizing agent.
  • adjustable timer relay H0 is energized to control the time period for provision of low heat through burner to crucible 40.
  • the timer relay 110 and other such relays which will be referred to below each comprise an electronic timer which is energized and then, subsequent to the expiration ofa preselected time period, an associated relay coil is energized to move the relay contacts from their illustrated rest positions.
  • Timer relay H0 and the other timer rclays to be described in the illustrated embodiment do not have mechanical latching but are rather held in a closed or latched position when desired by appropriate electrical holding circuits.
  • Timer relay 110 and similar adjustable timers to be described below are adjustable via appropriate control knobs on the front panel 6 of unit 4 to provide variable time periods for the respective cycles which they control.
  • time relay 110 After expiration of the preselected low heat time period on time relay 110, its coil is energized to respec tively energize gas solenoid valve 74b and air solenoid valve 72b to initiate the fusion heating or high heat cycle as well as to initiate the sequential timing of timers 112 and 114.
  • Timer 112 in the illustrated embodiment is a preset timer which provides a preset heating time of four minutes, following which variable timer relay 114 is energized. The total time period measured by these timers thus provides an adjustably timed premix fusion cycle.
  • timer relay 114 After the expiration of the premix cycle the closing of relay contacts on timer relay 114 completes a circuit through timer relay 116 and terminals 214a and 2141) to tilting circuit [90 to energize a compressed air solenoid valve 70 allowing air to flow to air cylinder to tilt platform 10 to a tilted position.
  • the closing of the relay contacts on timer relay 114 commences the timing function oftimer relays 116 and 118 as well as energizing motor 30 to commence rotation of the crucible while platform 10 remains in the tilted position.
  • Timer 118 is a preset timer providing preliminary mixing for a predetermined period. In the preferred embodiment illustrated. rotation of the crucible for about 90 seconds while in a tilted position. as determined by timer relay 118, allows the fused material to lap the walls of the crucible to prevent adherence thereto of any particle which may not have been incorporated into the main mass.
  • relay 118 After the expiration of time on relay 118, its relay coil is energized to provide an interconnection via terminals 216a and 216/) to tilt circuit [90 allowing the signal previously transmitted to valve to be passed to microswitch 184 via line 182 to initiate the cyclic tilting.
  • Solenoid valve 70 is a conventional normallympen normally-closed four-way pneumatic solenoid valve which is interconnected to a double acting air cylinder 50 by airlines and 77 to alternatively control the direction of movement ofthc piston within cylinder 5011s is well known to those skilled in the art.
  • microswitch 184 When platform 10 reaches full tilt, microswitch 184 is tripped. closing the normally open contacts. This in turn momentarily energizes the coil of relay I92 causing it to open its normally closed contacts to de energize air valve 70 and therefore switches the pressure to the other side of air cylinder 50 causing plat (ill form 10 to return to its horizontal rest position. While the contact with niicroswitch 184 is only momentary, the energization of relay 192 completes a holding circuit through the relay coil of relay 192 via the normally closed contacts of microswitch 180 and line 181.
  • heating may be continued if desired by activation of switch 150 to the position shown in the drawing to provide an additional 30 seconds of heating until timer times out energizing coil 106! to break the heating cycle by unlatching relay 106 and at the same time latching cooling relay 170 by cnergization of coil 170:1 and energizing a preset timer which provides a predetermined cooling period of ambient conditions of about three minutes Following expiration of this fixed time period, timer relay 132 is energized to control the amount of time that cooling air will be permitted to pass through the burner via activation of the valves of air control device 72.
  • coil [70!) is energized (which unlatches the cooling relay and power relay 102 is de-cnergized by interrupting the holding circuit thereto.
  • the system is thus returned to a ready position whereby, upon removal ofthc sample and insertion of a new sample, the cycle can be commenced again.
  • the circuitry illustrated in FIGS. 5 and 6 is usually incorporated into a unitary apparatus as generally shown at 80 in FlGS. l and 2 which then may be termed a master or independent unit.
  • This master unit can also be used to control several units which omit this control circuitry.
  • Such units can be referred to as slave units.
  • the components generally shown in FIG. 2, (exclusive of control mechanism 80) and shown schematically in FIG. 6, will be preferably incorporated into the slave unit.
  • the slave unit is connected to the master unit by an electrical cable or other suitable connecting means which electricaily communicates with the control mechanism 80 of the master unit.
  • This connection tillustrated at 5 in FlG. l) conveniently can be at the junction of terminals 200220, a and b. respectively. as previously described.
  • the ignition may be carried out through means other than a spark.
  • the various timers may be electronic or electromechanical or the like and may be all made adjustable or fixed depcnding upon the circumstances.
  • the rotation may be controlled by an air motor rather than an electrical motor; the tilting mechanism could be controlled by an electrical motor operated with a camming mechanism rather than the air cylinder shown.
  • Other modifications will also be readily discernible by those skilled in the art.
  • Apparatus for the preparation of homogeneously fused material comprising:
  • means for cooling said fused material after cessation of heating including solenoid operated valves.
  • the apparatus of claim 1 including means for maintaining said holding means at said predetermined angle while simultaneously rotating said holding means.
  • the apparatus of claim 1 including means for simultaneously rotating said holding means while cyclically tilting said holding means to said predetermined angle and returning said holding means to a vertical position.
  • Apparatus for the preparation of homogeneously fused material comprising:
  • heating means mounted to said platform to provide fusion heat to said material to be fused
  • means on said tiltahle platform for holding material to be fused including means to rotate said fusi ble material with respect to said housing;
  • cooling means to cool said fusible material after exposure to said fusion heat.
  • cooling means comprise ambient cooling means to control annealing of the solidified specimen and means for subsequently providing a cooling stream to the annealed specimen.
  • heating means comprise a gas burner and solenoid operated valves provide gas and air to said burner at predetermined volumes to control the heat supplied to said fusible material.
  • said means to r0- tate said fusible material include a motor operatively coupled to said holding means to rotate said fusible material with respect to said housing.
  • a process for the preparation of homogeneously fused material comprising:

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  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Clinical Laboratory Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
US407094A 1973-10-17 1973-10-17 Homogeneous fusion system and method Expired - Lifetime US3890089A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US407094A US3890089A (en) 1973-10-17 1973-10-17 Homogeneous fusion system and method
AU73576/74A AU477436B2 (en) 1973-10-17 1974-09-23 Homogeneous fusion system
CA210,558A CA1030440A (fr) 1973-10-17 1974-10-02 Systeme de fusion homogene
GB4418174A GB1471703A (en) 1973-10-17 1974-10-11 Homegeneous fusion system
DE2449829A DE2449829C3 (de) 1973-10-17 1974-10-16 Verfahren und Vorrichtung zur Erzeugung eines homogen zusammengeschmolzenen Materials
FR7435016A FR2248479B1 (fr) 1973-10-17 1974-10-17
JP11982474A JPS5317914B2 (fr) 1973-10-17 1974-10-17

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Application Number Priority Date Filing Date Title
US407094A US3890089A (en) 1973-10-17 1973-10-17 Homogeneous fusion system and method

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US3890089A true US3890089A (en) 1975-06-17

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US407094A Expired - Lifetime US3890089A (en) 1973-10-17 1973-10-17 Homogeneous fusion system and method

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US (1) US3890089A (fr)
JP (1) JPS5317914B2 (fr)
CA (1) CA1030440A (fr)
DE (1) DE2449829C3 (fr)
FR (1) FR2248479B1 (fr)
GB (1) GB1471703A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269827A (en) * 1991-03-01 1993-12-14 Leco Corporation Analytical sample preparation system
US5313047A (en) * 1991-03-01 1994-05-17 Leco Corporation Analytical sample preparation system
US5315091A (en) * 1993-03-02 1994-05-24 Leco Corporation Resistively heated sample preparation apparatus
CN105358955A (zh) * 2013-07-03 2016-02-24 蒂森克虏伯工业解决方案股份公司 用于制备压片的方法和装置
WO2017108810A1 (fr) * 2015-12-21 2017-06-29 Thyssenkrupp Industrial Solutions Ag Procédé et dispositif d'analyse d'un matériau échantillon

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1527321A (en) * 1977-01-04 1978-10-04 Claisse F Fusion and dissolution machine
FR2485733A1 (fr) * 1980-06-27 1981-12-31 Ciments Fs Dispositif automatique de fabrication d'echantillons destines a l'analyse
JPS6214352U (fr) * 1985-07-12 1987-01-28

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151360A (en) * 1937-01-14 1939-03-21 Jr Theodore Tafel Method for treating molten metal
US3151851A (en) * 1961-10-16 1964-10-06 John D Negley Oven and door arrangement
US3163696A (en) * 1961-05-09 1964-12-29 Stora Kopparbergs Bergslags Ab Arrangement for tiltable furnaces
US3259485A (en) * 1961-12-13 1966-07-05 Stora Kopparbergs Bergslags Ab Process for imparting an intermixing motion to a liquid mass of iron and slag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151360A (en) * 1937-01-14 1939-03-21 Jr Theodore Tafel Method for treating molten metal
US3163696A (en) * 1961-05-09 1964-12-29 Stora Kopparbergs Bergslags Ab Arrangement for tiltable furnaces
US3151851A (en) * 1961-10-16 1964-10-06 John D Negley Oven and door arrangement
US3259485A (en) * 1961-12-13 1966-07-05 Stora Kopparbergs Bergslags Ab Process for imparting an intermixing motion to a liquid mass of iron and slag

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269827A (en) * 1991-03-01 1993-12-14 Leco Corporation Analytical sample preparation system
US5277493A (en) * 1991-03-01 1994-01-11 Leco Corporation Analytical sample preparation system
US5313047A (en) * 1991-03-01 1994-05-17 Leco Corporation Analytical sample preparation system
US5315091A (en) * 1993-03-02 1994-05-24 Leco Corporation Resistively heated sample preparation apparatus
CN105358955A (zh) * 2013-07-03 2016-02-24 蒂森克虏伯工业解决方案股份公司 用于制备压片的方法和装置
US10067039B2 (en) 2013-07-03 2018-09-04 Thyssenkrupp Industrial Solutions Ag Method and apparatus for producing a pellet
WO2017108810A1 (fr) * 2015-12-21 2017-06-29 Thyssenkrupp Industrial Solutions Ag Procédé et dispositif d'analyse d'un matériau échantillon
AU2016378266B2 (en) * 2015-12-21 2019-12-05 Thyssenkrupp Ag Method and system for analyzing a sample material

Also Published As

Publication number Publication date
JPS50113287A (fr) 1975-09-05
DE2449829C3 (de) 1980-05-22
FR2248479A1 (fr) 1975-05-16
GB1471703A (en) 1977-04-27
CA1030440A (fr) 1978-05-02
FR2248479B1 (fr) 1976-10-22
JPS5317914B2 (fr) 1978-06-12
DE2449829A1 (de) 1975-04-24
AU7357674A (en) 1976-03-25
DE2449829B2 (fr) 1979-09-06

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