SN/T 2763.3-2012Chemical analysis of nickel laterite ore - Part 3: Determination of total iron content - Titanium (III) chloride reduction methods (English PDF)

Foreword

SN/T 3323 "Mill scale" consists of 5 parts:

- Part 1: Determination of ferrous oxide - Potassium dichromate titration;

- Part 2: Determination of sulfur content - High frequency combustion infrared

absorption method;

- Part 3: Determination of lead, chromium, cadmium. Inductively coupled plasma

atomic emission spectrometry

- Part 4: Determination of arsenic and mercury - Atomic fluorescence spectrometric

method;

- Part 5: Determination of iron and silicon, calcium, phosphorus, manganese,

aluminium, titanium and magnesium - X-ray fluorescence spectrometric method.

This Part is Part 2 of SN/T 3323.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part was proposed by and shall be under the jurisdiction of National Certification

and Accreditation Administration Commission.

The drafting organizations of this Part: Tianjin Entry-Exit Inspection And Quarantine

Bureau of the People's Republic of China.

Main drafters of this Part: Wang Hong, Li Yi, Chen Guangzhi, Wu Suru, Wang Zhaorui,

Hou Shujian.

Mill scale - Part 2: Determination of sulfur content - High

frequency combustion infrared absorption method

1 Scope

This Part of SN/T 3323 specifies high frequency combustion infrared absorption

method, the method to determine the sulfur content in mill scale.

This Part is applicable to the determination of sulfur content in mill scale. The

determination range is 0.002%~0.40%.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

GB/T 2007.1, General rules for the sampling and sample preparation of minerals in

bulk - Sampling by manual method

GB/T 2007.2, General rules for the sampling and sample preparation of minerals in

bulk - Sample preparation by manual method

3 Method summary

The test material is heated and burned in the oxygen flow of the high-frequency

induction furnace. The generated sulfur dioxide is carried by oxygen to the measuring

chamber of the infrared analyzer. Detect the infrared absorption energy of sulfur dioxide

for specific wavelengths. Its absorption energy is proportional to its concentration. The

sulfur content can be measured according to the change in the energy received by the

detector.

4 Reagents

Unless otherwise stated, all reagents are analytically pure.