YS/T 1047.11-2015Methods for chemical analysis of copper magnetite - Part 11: Determination of magnet iron content - Potassium dichromate titration method (English PDF)

Foreword

YS/T 1047-2015 "Methods for chemical analysis of copper magnetite" is divided into 11 sections.

--- Part 1. Determination of copper content of 2,2'-quinoline spectrophotometry and flame atomic absorption spectrometry;

--- Part 2. Determination of total iron content of dichromate method;

--- Part 3. Copper and iron - Determination of the amount of sodium thiosulfate titration;

--- Part 4. Determination of the amount of sulfur by high frequency combustion infrared absorption spectroscopy;

--- Part 5. Determination of phosphorus content titration;

--- Part 6. copper, total iron, silica, alumina, calcium oxide, magnesium oxide, titanium oxide, manganese and phosphorus contents - wave Long-dispersive X-ray fluorescence spectrometry;

--- Part 7. copper, manganese, aluminum, calcium, magnesium, titanium and phosphorus content - Inductively coupled plasma atomic emission spectrometry.

--- Part 8. silicon dioxide content - Gravimetric method;

--- Part 9. Determination of metallic iron content of sulfonic acid spectrophotometry;

--- Part 10. Determination of the amount of ferrous oxide dichromate method;

--- Part 11. Determination of the amount of magnetic iron dichromate method.

This is Part 11.

This section drafted in accordance with GB/T 1.1-2009 given rules.

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

This section is responsible for drafting unit. People's Republic of China Bayuquan Exit Inspection and Quarantine.

1 Scope

YS/T 1047 This section specifies the method for measuring the amount of magnetic iron copper magnetite.

This section applies to the determination of the amount of magnetic iron copper magnetite. Measurement range (mass fraction) was 38.00% ~ 62.00%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

Laboratory use specifications and test methods GB/T 6682 Analysis GB/T 6730.3 chemical analysis of iron gravimetric method for the determination of hygroscopic moisture in analytical samples GB/T 10322.1 iron ore sampling and sample preparation methods GB/T 12805 Laboratory glassware Burettes GB/T 12806 Laboratory glassware single marking flask GB/T 12808 Laboratory glassware single marking pipette

3 Method summary

The sample was dispersed in water, at (72000 ± 8000) at A/m magnetic field strength, the use of the manual separating magnetic material magnetic separation. Acid-soluble Magnetic material, separation of copper. With stannous chloride - titanium trichloride reduction, dilute solution of potassium dichromate oxidation of excess reducing agent. Diphenylamine sulfonate as Indicator, titrate with potassium dichromate standard quantity of magnetic iron.

4 Reagents

Unless otherwise stated, use only in the analysis confirmed analytically pure reagents and in line with two water GB/T 6682 regulations.

4.1 hydrochloric acid (rho = 1.19g/mL).

4.2 sulfate (rho = 1.84g/mL).

4.3 phosphoric acid (rho = 1.69g/mL).

Aqueous ammonia 4.4 (rho = 0.90g/mL).

4.5 Hydrogen peroxide (30%).

4.6 hydrochloride (11).

4.7 hydrochloride (110).

4.8 ammonia (595).

4.9 parathion mixed acid. Under constant stirring, followed by the 200mL phosphate (4.3) and 300mL of sulfuric acid (4.2) was poured into 500mL of water, mixed Uniform cooling.