A kind of thick wall hydrothermal autoclave and using method

Abstract

A thick-walled hydrothermal autoclave and its use method belong to the fields of basic geological research and experimental geochemistry. Consists of liner, sealing plug, C‑pressure cap, pressure shell, and graphite gasket. The inner tank is set in the pressure-bearing shell, and a titanium alloy sealing plug is placed at each end, and a graphite gasket is placed between the sealing plug and the inner tank to make the reaction chamber airtight. Pressure-bearing shells are provided with pressure-bearing covers up and down. When in use, the titanium alloy reaction vessel is filled with deionized water and sealed, and the entire thick-walled hydrothermal autoclave is heated in a muffle furnace, heated to 500°C for 1 hour, and kept at this temperature for 1 hour. After the whole heating and heat preservation process is over, the thick-walled hydrothermal autoclave is quenched and cooled. After opening the device, it is found that the liquid in the reaction chamber has not leaked. The thick-walled hydrothermal autoclave can withstand an internal pressure of not less than 950MPa, which is much higher than the currently commonly used titanium alloy reactor, so the thick-walled hydrothermal autoclave can carry out solubility quantitative experiments in a larger temperature and pressure range .

Description

technical field [0001] The invention belongs to the field of basic geological research and experimental geochemistry. The specific content is to use the new experimental device combined with muffle furnace heating to conduct ex-situ hydrothermal geochemical experiments under high temperature and high pressure, and rely on mass spectrometers and other experimental instruments to monitor The experimental system carries out quantitative research and simulates the process of geological activities, thereby revealing the laws of geosciences. Background technique [0002] In recent years, the material cycle and energy flow in the deep earth have become a research hotspot. However, due to various conditions, it is almost impossible to directly study the existence forms and chemical reactions of various substances in the deep earth. Therefore, based on various thermodynamics of different substances Thermodynamic simulations with different parameters (such as ΔH, ΔG, and ΔS, etc.) hav...

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Problems solved by technology

However, due to the lack of experimental data at high temperature and high pressure, the accuracy of thermodynamic parameters at high temperature and high pressure based on extrapolation under lower temperature and pressure conditions is unknown, which greatly restricts the accuracy of thermodynamic simulations based on the deep temperature and pressure conditions of the earth. sex

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