Detection method for determining contents of niobium and tantalum in niobium-tantalum ore

Abstract

The invention relates to a detection method for determining the contents of niobium and tantalum in niobium-tantalum ore. The method comprises the following steps of (1) placing a niobium-tantalum oresample into a polytetrafluoroethylene beaker, and adding deionized water for wetting; (2) sequentially adding nitric acid, perchloric acid and hydrofluoric acid into the polytetrafluoroethylene beaker; gently and uniformly shaking the mixture; flushing the beaker wall by deionized water; and placing the polytetrafluoroethylene beaker on an electric heating plate of 180 DEG C to 220 DEG C to be heated for decomposition; (3) after the heating is performed until perchloric acid smoke is totally released, adding 8 to 10 mL of aqua regia solution; performing heat insulation until the sample is dissolved; when 3 to 4 mL of aqua regia solution is remained, flushing the beaker wall by deionized water; and after the flushing is completed, performing heat insulation for 10 minutes again; (4) aftercooling to the room temperature, transferring the mixture into a 50 mL colorimetric tube to reach the constant volume; (5) preparing a mixed standard series solution; (6) taking the solution in the step (4) for performing determination on an inductively coupled plasma emission spectrometer; and (7) drawing a working curve. The method has the advantages that the safe and smooth proceeding of the detection process can be realized, and the operation process is simple.

Description

technical field [0001] The invention relates to a detection method for determining the content of niobium and tantalum in niobium-tantalum ore, and belongs to the technical field of element determination of niobium-tantalum ore. Background technique [0002] At present, in the detection of niobium and tantalum in niobium and tantalum ores, alkali fusion-inductively coupled plasma emission spectrometry is generally used, and alkali fusion is required for pretreatment during detection. The alkali fusion reagent is dehydrated lithium metaborate, and the temperature The temperature is 1000°C, and the melted sample needs to be taken out of the muffle furnace immediately. If the temperature is too high, burn accidents may easily occur; after the sample is taken out, the graphite crucible containing the sample should be quickly transferred to a beaker containing water. In the method, the sample is easy to stick to the graphite crucible when it is cold, and the pretreatment process ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the detection of niobium and tantalum in niobium and tantalum ores, alkali fusion-inductively coupled plasma emission spectrometry is generally used, and alkali fusion is required for pretreatment during detection. The alkali fusion reagent is dehydrated lithium metaborate, and the temperature The temperature is 1000°C, and the melted sample needs to be taken out of the muffle furnace immediately. If the temperature is too high, burn accidents may easily occur; after the sample is taken out, the graphite crucible containing the sample should be quickly transferred to a beaker containing water. In the method, the sample is easy to stick to the graphite crucible when it is cold, and the pretreatment process is long, which is not easy to operate and affects the subsequent measurement. This is the deficiency of the existing technology.

Images