GB/T 4701.2-2009Ferrotitanium - Determination of silicon content - The sulphuric acid dehydration gravimetric method (English PDF)

1 Scope

This section specifies the determination of the silicon content of ilmenite with sulfuric acid dehydration gravimetric method.

This section applies to the determination of silicon content in ferrotitanium. Measurement range (mass fraction). 1.00% - 6.00%.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this section. For dated references, subsequently

Some amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to agreements based on this research

Study whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 4010 alloy chemical analysis and preparation of samples

Principle 3

The sample was dissolved in sulfuric acid and hydrochloric acid until no reaction was filtered, and the residue used mixed flux of sodium oxide and sodium carbonate melt processed after the original filter

Were combined, then hydrogen peroxide, the solution was evaporated to take fuming sulfuric acid, dehydrated silicic acid, hydrochloric acid to dissolve the soluble salts, the precipitate is separated, dried

After filtration the precipitate was washed with ignition at 1050 °C to constant weight, and then treated with sulfuric acid and hydrofluoric acid, silicon tetrafluoride to silicon escape, hydrofluoric acid

Poor quality before and after treatment, calculated content of silicon in the sample.

4 Reagents and materials

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water.

5 Sampling and Preparation

In accordance with the provisions of GB/T 4010 will be sampling and sample preparation, the sample should be adopted 0.125mm sieve.

Step 6 Analysis