Method and apparatus for measuring of a gas forming part of a gas mixture,preferably for measuring the quantity of carbon of solid bodies such as steel and carbides

Abstract

Abstract AN AUTOMATICAL ANALYSER MEASURES THE PERCENTAGE OF A COMPONENT SUCH AS CARBON, SULPHUR, HYDROGEN, ETC. OF A SOLID, LIQUID OR GASEOUS SUBSTANCE, PARTICULARLY THE CARBON CONTENTS OF STEEL, HARD METALS AND CARBIDES, BY LOW PRES- SURE MEASUREMENT OF GAS. A SAMPLE OF SAID SUBSTANCE IS DECOMPOSED, FOR EXAMPLE THERMICALLY, TO RELEASE SAID COMPONENT IN GASEOUS FORM, PREFERABLY AS A SUITABLE GASEOUS OXIDE OR SIMILAR COMPOUND. AFTER PURIFICATION, THE COMPONENT GAS THUS OBTAINED IS SEPARATED FROM ALL OTHER GASES BY A FREEZING PROCESS AND THE COMPONENT GAS IS FROZEN AND COOLED TO A TEMPERATURE LOWER THAN THE FREEZING POINT THEREOF. THE SPACE CONTAINING SAID FROZEN GAS IS HERMETICALLY SEALED AND EVACUATED. THEN, THE FROZEN GAS IS EVAPORATED AND PASSES THROUGH AN EVACUATED GAS LINE INTO AN EVACUATED SPACE OF A PRESSURE GAUGE DEVICE WHEREIN THE COMPONENT GAS IS REFROZEN. THEN THE LATTER SPACE IS CUT OFF FROM SAID LINE AND THE FIRST SPACE. THE FROZEN GAS IS EVAPORATED AGAIN AND CAUSED TO OPERATE THE PRESSURE GAUGE DEVICE UNDER CONSTANT VOLUME AND TEMPERATURE CONDITION SO THAT THIS DEVICE INDICATES THE PRESSURE OF THE EVAPORATED GAS, WHICH PRESSURE IS A MEASURE OF THE QUANTITY OF THE GAS IN DEPENDENCE ON THE GAS CONSTANT, CONSTANT VOLUME, CONSTANT TEMPERATURE AND VARIABLE PRESSURE.

Inventors

• 👤 Nils Johannes Baecklund

Bibliographic Details