Sample gas extraction device for testing total sulfur and effective sulfur content of non-metal powder

Abstract

The invention discloses a sample gas extraction device for testing total sulfur and effective sulfur content of non-metal powder, and relates to the field of non-metal powder material sulfur content testing instruments, the sample gas extraction device comprises a furnace body provided with a furnace end at the top, a quartz sample tube is arranged in the furnace body, and the top of the quartz sample tube is hermetically connected with the furnace end through a sealing ring; a crucible support base is mounted at the bottom of the furnace body, a crucible support is mounted on the crucible support base through a connecting piece, and a sample is contained in the crucible support; a lifting cylinder connected with the crucible support base is arranged below the furnace body; a top-blown oxygen path joint and a sample gas outlet which are communicated with the quartz sample tube are formed in the furnace end, and the outer end of the sample gas outlet is connected with a detector; a reflecting mirror is arranged on the inner wall of the furnace body, and an infrared heating tube is arranged between the reflecting mirror and the quartz sample tube. The temperature control precision ishigh, the SO2 release rate is stable, and the sulfur analysis precision can be effectively improved.

Description

technical field [0001] The invention relates to the field of testing instruments for the sulfur content of non-metallic powder materials, in particular to a sample gas extraction device for testing the total sulfur and effective sulfur content of non-metallic powders. Background technique [0002] Sulfur is a common element in materials, and both metal and non-metal powders contain some sulfur. The traditional detection of sulfur is concentrated in the field of metals, especially steel. Because sulfur mainly comes from the raw materials of steelmaking (such as: mineral powder, various furnace charges, etc.), it has a strong impact on the performance of steel, and excessive sulfur will make the steel brittle, so accurate testing of raw material mineral powder and other powder charge The sulfur content in the medium is very important, and higher requirements are also put forward for the sulfur measuring instrument. [0003] After searching the standards and patents, the curr...

AI Technical Summary

Problems solved by technology

However, for powdered non-metallic and mineral powder samples, the required sampling volume should be 30-50g. High-frequency furnace sampling is not representative, coupled with the influence of blank signals, the stability of the analysis results is very poor, and it is not suitable for measuring mineral powder and mineral powder. Samples of solid non-metallic raw materials

The high-frequency furnace cannot achieve precise constant temperature, so it cannot be used for kinetic research on elements in different valence states

Mineral powder sometimes needs to measure the S content of different forms (such as: sulfur concentrate, it is necessary to measure the content of effective sulfur and total sulfur at the same time, the effective sulfur is set at 850 ℃, and the total sulfur is at 1260 ℃). The high frequency furnace is only suitable for measuring total sulfur, and cannot be applied to the accurate determination of effective sulfur in ore powder such as sulfur concentrate

[0005] Resistance furnace: heating and cooling are very slow. It takes 1.5-2 hours to warm up when starting up, and 2-3 hours to cool down after turning off. The test efficiency is extremely low and the failure rate is high.

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