GB/T 6730.10-2014: Iron ores -- Determination of silicon content -- Gravimetric methods

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Scope

This Part of GB/T 6730 specifies the gravimetric determination of silicon content in iron
ores.
This Part is applicable to natural iron ores, iron concentrates and man-made ore
agglomerates, including sintered products. The range of determination (mass fraction)
is 1.00% ~ 15.00%.
Method 1: this method is not applicable to iron ores with a reducing agent content
greater than 2% (mass fraction), for example, pyrite, or iron ores with fluorine content
greater than 0.1% (mass fraction). This method is recommended for low-grade ores
with a relatively high amphoteric element content.
Method 2: this method may be used for iron ores with fluorine content greater than 0.1%
(mass fraction). This method is recommended for high-grade ores with low gangue
content.
NOTE: for samples whose silicon content is less than 5% (mass fraction), the silico-
molybdic acid reduction spectrophotometry is more suitable.

Basic Data

Standard ID	GB/T 6730.10-2014 (GB/T6730.10-2014)
Description (Translated English)	Iron ores -- Determination of silicon content -- Gravimetric methods
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	D31
Classification of International Standard	73.060.10
Word Count Estimation	14,176
Date of Issue	9/30/2014
Date of Implementation	5/1/2015
Older Standard (superseded by this standard)	GB/T 6730.10-1986
Quoted Standard	GB/T 6682; GB/T 6730.1; GB/T 6730.3; GB/T 10322.1; GB/T 12806; GB/T 12808
Adopted Standard	ISO 2598-1-1992, NEQ
Regulation (derived from)	People's Republic of China Announcement of Newly Approved National Standards 2014 No. 22
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies the determination of silicon in iron content by gravimetric method. This Standard is applicable to natural iron ore, iron ore concentrate and artificial blocks, including sintered products. Measuring range (mass fraction) of 1. 00%