GB1025942A - Analytical method and apparatus - Google Patents

Analytical method and apparatus

Info

Publication number
GB1025942A
GB1025942A GB1598/63A GB159863A GB1025942A GB 1025942 A GB1025942 A GB 1025942A GB 1598/63 A GB1598/63 A GB 1598/63A GB 159863 A GB159863 A GB 159863A GB 1025942 A GB1025942 A GB 1025942A
Authority
GB
United Kingdom
Prior art keywords
oxygen
stream
volatile
thermistor
furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1598/63A
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.)
Steel Company of Canada Ltd
Original Assignee
Steel Company of Canada Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steel Company of Canada Ltd filed Critical Steel Company of Canada Ltd
Publication of GB1025942A publication Critical patent/GB1025942A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20—Metals
    • G01N33/202—Constituents thereof
    • G01N33/2022—Non-metallic constituents
    • G01N33/2025—Gaseous constituents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

A method of determining the amount in a solid test sample, of an element capable of forming a volatile oxide, e.g. C or S in a steel sample, comprises reacting particles of the test sample in a heated reaction zone (10) with oxygen, completely withdrawing a stream of oxygen and the volatile oxide and monitoring changes in thermal conductivity of said stream (measured by thermistor 20) at constant flow rate. The above numerals refer to the Figure (not shown) in which an oxygen inlet conduit 11 is connected to the furnace 10, having a pressure regulating valve 12 giving constant oxygen pressure in the furnace, regardless of furnace oxygen requirements. The volatile oxides formed may be passed through a filter 16, and thence to purifying towers in which one or more of the volatile impurities is removed. A three-way valve 14 enables the gas to be passed to atmosphere, or, via capillary tube 15 reducing the pressure to atmospheric, to an oxidizing tower 18, containing, e.g. heated catalytic cupric oxide, to oxidise the volatile oxide to its highest form. A heat exchanger 19 brings the gas stream to the temperature at which thermistor 20 has been previously calibrated with oxygen alone, and the signal from the thermistor is passed to an integrating recorder 21, which enables the signals to be read as a direct percentage of the element in the gas stream and as the total element of interest in the sample. The C and S contents of a steel may be determined together by first monitoring a stream containing both oxides, then passing the stream through an SO2 absorber and a second monitoring stage. The first monitor gives total C + S and the second gives C content.
GB1598/63A 1962-03-27 1963-01-14 Analytical method and apparatus Expired GB1025942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA845282 1962-03-27

Publications (1)

Publication Number Publication Date
GB1025942A true GB1025942A (en) 1966-04-14

Family

ID=4141451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1598/63A Expired GB1025942A (en) 1962-03-27 1963-01-14 Analytical method and apparatus

Country Status (5)

Country Link
BE (1) BE629036A (en)
DE (1) DE1523030A1 (en)
GB (1) GB1025942A (en)
LU (1) LU43197A1 (en)
SE (1) SE304622B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1283419A2 (en) * 2001-08-11 2003-02-12 Robert Bosch Gmbh Device for determining the concentration of particles in a exhaust gas flow

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428770A (en) * 1982-02-23 1984-01-31 University Patents, Inc. Methods of manufacturing metal from a melt, determination of sulfur and carbon therein, sensors therefor and solid electrolyte compositions for said sensors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1283419A2 (en) * 2001-08-11 2003-02-12 Robert Bosch Gmbh Device for determining the concentration of particles in a exhaust gas flow
EP1283419A3 (en) * 2001-08-11 2004-12-22 Robert Bosch Gmbh Device for determining the concentration of particles in a exhaust gas flow
US7117718B2 (en) 2001-08-11 2006-10-10 Robert Bosch Gmbh Device for ascertaining a particle concentration in an exhaust gas flow

Also Published As

Publication number Publication date
LU43197A1 (en) 1963-04-14
DE1523030A1 (en) 1969-06-26
SE304622B (en) 1968-09-30
BE629036A (en) 1900-01-01

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