Method for analyzing tantalum-niobium ore through low-dilution ratio fused X-ray fluorescence spectroscopy
A technology of fluorescence spectrum and dilution ratio, which is applied in the direction of material analysis, analysis materials, and test sample preparation using wave/particle radiation, can solve the unprecedented problems in the field of niobium and tantalum resources, and save manpower, material resources, and data Accurate, fast analysis results
Active Publication Date: 2018-01-12
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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[0007] The excellent linear range and reproducibility of X-ray fluorescence spectroscopy and the advantages of multi-element analysis make it widely used in the field of geological minerals, but there is no precedent in the field of dealing with niobium and tantalum resources. A low dilution ratio melt-XRF analysis method is necessary
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[0027] Such as figure 1 As shown, the composition determination of niobium-tantalum ore can be carried out through the following steps:
[0028] 1. Determine the target element;
[0029] 2. Selection of reference materials;
[0030] 3. Optimize the fusion sample preparation procedure;
[0031] 4. Preparation of standard samples;
[0032] 5. Matrix and spectral line overlap correction;
[0033] 6. Actual sample verification: After the verification, the sample meets the requirements, and then it is put into production application; if the verification does not meet the requirements, the matrix and spectral line overlap correction is performed again until the requirements are met.
[0034] Carry out the following specific determination steps according to the above-mentioned basic process:
[0035] First, select niobium-tantalum ore standard substance GBW07154, rare earth ore standard substance GBW07184, GBW07185, vanadium-titanium magnetite tailings standard substance YSBC197...
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The invention discloses a method for analyzing tantalum-niobium ore through a low-dilution ratio fused X-ray fluorescence spectroscopy. The method comprises the following steps: firstly designing a standard curve, preparing and fusing a standard sample, then determining instrument analysis conditions, correcting a matrix and spectral line overlapping effect, establishing an analytical method to simulate the validity of a raw ore and concentrate sample verification method and determining niobium, tantalum, titanium, silicon, iron, manganese, calcium, aluminum, sodium, potassium and tungsten inthe niobium-tantalum ore. A low-dilution ratio fused sample preparation method is used as a method for pretreatment in X-ray fluorescence spectrology analysis of the tantalum-niobium ore, and on the premise of ensuring the method sensitivity, a particle size effect and a mineral effect are eliminated; besides, the sample decomposition problem is also solved, and the hydrolysis of the niobium and the tantalum in an acid solution is avoided; the low-dilution ratio fused X-ray fluorescence spectroscopy method is more time-saving and labor-saving than a traditional method when being used for analyzing major and minor components in the tantalum-niobium ore; and the method has the advantages of being low in detection limit, wide in linear range, high in analysis speed and the like.
Description
technical field [0001] The invention relates to a method for determining ore components, in particular to a method for analyzing primary and secondary components in niobium-tantalum ore by melting-X-ray fluorescence spectrometry at a low dilution ratio. Background technique [0002] Niobium and tantalum are similar in nature and are the main species of rare metals. Niobium and tantalum are closely symbiotic in nature, and their content is relatively high in granite, mainly occurring in niobium and tantalate minerals. Niobium and tantalum have excellent characteristics such as high strength, corrosion resistance, heat conduction, superconductivity, unipolar conduction and gas absorption; good cold processing performance and good electrical properties of oxide film, etc., are widely used in metallurgy, machinery, chemical industry, ceramics, glass building materials ; Especially in missiles, rockets, nuclear weapons, electronic technology, aerospace and aviation, atomic energ...
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IPC IPC(8): G01N23/223G01N1/36G01N1/44G01N1/38
Inventor 李可及赵朝辉卢彦李刚
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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