Device for detecting halogen elements in ore products by water vapor distillation method and detection method

Abstract

The invention discloses a device for detecting halogen elements in ore products by a water vapor distillation method and a detection method. Through the organic combination of five links of reaction,distillation, absorption, cleaning and liquid discharge, F and Cl in the ore products escape in an acid steam form in strong acid environment, are separated from a complicated base body solution through being driven by water vapor carrier gas, and enter an adsorption bottle to be adsorbed by low-concentration alkali solution to form a salt form; the halogen element concentration is detected through an ion chromatograph; through the connection of water and steam pipeline, the device can realize the automatic cleaning. The heating is always and continuously performed in the detection step, the temperature of pipe fittings and distilled water in the device is basically stable; the repeated heating is not needed; the repeated assembly and dismounting of each component is not needed for automatic cleaning; the labor and the time are greatly reduced. The whole device has the characteristics that the structure is simple, size, ingenious and compact; the installation is convenient and fast; the operation is easy; safety and reliability are realized; the carrying is easy; the airtightness is good, and the like.

Description

technical field [0001] The invention relates to a device and a detection method for detecting halogen elements in mineral products by a steam distillation method. Background technique [0002] At present, the detection of halogens in mineral products is mainly divided into two parts: water-soluble and total amount detection. The detection of water-soluble halogens is relatively simple, and can be extracted by adding water. The pre-treatment for the detection of the total amount of halogens is relatively complicated and varies depending on the detection method. If the titration method and the ion-selective electrode method are used, it is sufficient to dissolve the acid and then adjust the pH for measurement. At present, the commonly used pretreatment method is acid distillation-alkali absorption, and then the content is determined by ion chromatography. Both GB / T 6730.69-2010 and GB / T3884.12-2010 adopt this pretreatment method. [0003] The main devices of the traditional c...

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Problems solved by technology

Since quantitative analysis requires multiple parallel experiments, the repeated assembly, disassembly, heating, and cooling of the device greatly reduces the work efficiency, and causes the internal environment of the device to be unstable, resulting in device errors such as differences in the air tightness of the conduit connection. , affecting the precision of the analysis results

Secondly, in the reaction process, it is difficult to drive all the acid gas into the condenser tube only by the water vapor evaporated from the high-concentration digestion acid, and there are residues in the distillation bottle, and these acid gases have a high boiling point and are difficult to be eliminated in the condenser tube. Cooling, which affects the absorption effect of the absorbent

If distilled water is added to the retort to generate water vapor, the digestion acid will be diluted and complete reaction will not be achieved

In addition, after the reaction is completed, the waste liquid obtained by cleaning the distillation bottle and the condensing tube cannot be collected effectively, and it will cause environmental pollution if it is discharged into the sewer

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