YS/T 358.3-2011Methods for chemical analysis of tantalite, columbite concentrate. Part 3: Determination of silicon dioxide content. Silicomolybdenum blue spectrophotometry and gravimetry (English PDF)

Foreword

YS/T 358 "iron tantalum, niobium, iron ore chemical analysis method" includes 12 parts.

--- Part 1. tantalum, niobium determining the amount of the paper color layer weight method;

--- Part 2. Determination of titanium dioxide content of the double security for DAM spectrophotometry;

--- Part 3. Determination of silicon dioxide content and weight of molybdenum blue spectrophotometric method;

--- Part 4. Determination of tungsten trioxide content of thiocyanate spectrophotometric method;

--- Part 5. uranium content - Inductively coupled plasma atomic emission spectrometry;

--- Part 6. thorium oxide content - Inductively coupled plasma atomic emission spectrometry;

--- Part 7. Determination of iron content by inductively coupled plasma atomic emission spectrometry;

--- Part 8. Determination of the amount of ferrous dichromate method;

--- Part 9. Determination of antimony content by inductively coupled plasma atomic emission spectrometry;

--- Part 10. Determination of tin content potassium iodate titration;

--- Part 11. Determination of the amount of manganese atomic absorption spectrometry;

--- Part 12. Determination of hygroscopic water gravimetric method.

This section YS/T Part 3 358.

The partial replacement of YS/T 358-1994 "iron tantalum, niobium, iron ore chemical analysis method" (formerly YB874-76) Part IV, "Silica Determination (1,2,4 acid - Silicon molybdenum blue method) amount. " this portion of YS /358-1994 Part IV T compared to the main changes are as follows.

--- Gives a detection limit;

--- Determination of the acid 2,4 - Silicon molybdenum blue colorimetric method to use ascorbic acid content of less than 5% - Silicon molybdenum blue spectrophotometry; content 5% or more by weight method;

--- Increasing the precision of the terms;

--- Text format has been modified to increase the quality assurance and control provisions.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

This section is drafted. Ganzhou Nonferrous Metallurgy Research Institute, a limited liability company Jiujiang tantalum-niobium, tantalum and niobium ore Yichun, Conghua Tantalum-Niobium smelter.

1 Scope

This method specifies iron tantalum, niobium iron ore Determination of silicon dioxide content.

This method is suitable for iron, tantalum, niobium determination of silicon dioxide content of iron concentrate. A method for determining the range of 0.50% to 5.00%. The method II measurement range is > 5.00% to 20.00%.

2 Method, a silicon molybdenum blue spectrophotometry