Miniature double-vacuum furnace tube and use method thereof

Abstract

The invention relates to a miniature double-vacuum furnace tube. The double-vacuum furnace tube comprises a stainless steel penetrating tube, a stainless steel side penetrating tube, a blind tube withhigh vacuum or ultrahigh vacuum air tightness and an outer tube with vacuum air tightness. The outer tube is connected with a KF flange and the stainless steel side penetrating tube through a joint;the KF flange is connected with a KF tube penetrating flange, and the center of the KF tube penetrating flange is provided with the stainless steel penetrating tube; a port, corresponding to the outerside of the KF type tube penetrating flange, of the stainless steel penetrating tube is connected with an instrument equipment connector; and a port, corresponding to the inner side of the KF type tube penetrating flange, of the stainless steel penetrating tube is provided with a stainless steel tube and blind tube connector with high vacuum or ultrahigh vacuum air tightness, and the stainless steel tube and blind tube connector is connected with the blind tube. Meanwhile, a using method of the furnace tube is also disclosed. The furnace tube has the characteristics of high temperature resistance, good air tightness, low price and the like, and can meet the requirements of high temperature thermal explosion degassing experiments on fluid inclusion in rock / mineral samples.

Description

technical field [0001] The invention relates to the field of geochemistry, in particular to a miniature double vacuum furnace tube and an application method thereof. Background technique [0002] The geochemical characteristics of trapped gas in a rock or mineral sample can reflect its physicochemical environment, source and evolution during crystallization or generation. The analysis and research of these gases is of great significance for further revealing the interaction mechanism of fluids in the earth's interior. In the analysis of the chemical composition and isotopic composition of gas trapped in rock samples, the thermal detonation method is a common method. This method heats the sample in a vacuum system, causing the gas-liquid inclusions in it to burst to release the gas, and at the same time release There are also adsorbed gases in mineral fractures and structural voids, as well as some components in mineral structures. By controlling the heating temperature, th...

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Problems solved by technology

Each of these methods has different defects: 1. Ordinary glass tubes can only withstand temperatures no higher than 600°C, while the rock samples to be tested often need to be heated above 600°C to release the fluid components in their inclusions, or even Reach 1200°C to release all the gas trapped in rock or mineral samples; 2. Quartz glass tube can withstand high temperature of 1200°C, but because there are many irregular voids in the quartz glass network structure, it is possible for many gases to diffuse and Infiltration, and the gas content in the fluid inclusion itself is very low, slight leakage may affect the experimental results; 3. The double vacuum furnace tube composed of molybdenum or tantalum can withstand high temperature, and its airtightness is better than that of quartz glass tube , but the material is expensive and easily damaged, resulting in high experimental costs

Molybdenum or tantalum material is chemically stable at room temperature, but it will be oxidized at high temperature, so the double vacuum furnace tube made of molybdenum or tantalum should be heated in a vacuum environment, that is, double vacuum furnace tube, heating element and temperature measuring element The outside also needs a vacuum environment, resulting in a larger overall equipment volume and higher energy consumption

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