金属矿石及相关材料中碳,硫,和酸碱特性分析的标准试验方法

详细信息   

• 标准号：ASTM E1915-2011
• 发布日期：2011
• 英文题名：Standard Test Methods for Analysis of Metal Bearing Ores and Related Materials for Carbon, Sulfur, and Acid-Base Characteristics
• 英文主题词：acid neutralization potential ; carbonate carbon content ; carbon content ; net calcium carbonate content ; ores ; organic carbon content ; related materials ; sulfate sulfur content ; sulfide sulfur content ; sulfur content ; tailings ; leach residue ; waste rock ; Carbon content--metals/alloys ; Chemical analysis--metals/alloys ; Combustion infrared absorption spectrometry ; Metal-bearing ores ; Spectrometry ; Sulfur--metals/alloys ; Tailings ; Total carbon (TC)
• 标准状态：现行
• 发布单位：US-ASTM
• 国际标准分类号：71.040.50 (Physicochemical methods of analysis)
• 载体形态：21P.;A4
• 中国标准分类号：D04
• 国别：美国材料与试验协会

文摘

These test methods are primarily intended to test materials for compliance with compositional specifications and for monitoring. The determination of carbon and sulfur and acid neutralization potential in ores and related materials is necessary to classify ores for metallurgical processing and to classify waste materials from the mining and processing of ores such as leach residues, waste rock, and tailings according to their potential to generate acid in the environment. This information is useful during mine development to assist in mining and mineral processing operations and for proper disposal of waste materials. These test methods are also used to speciate carbon and sulfur contents of metal-bearing ores and related materials so that acid-base accounting can be performed (that is, carbonate mineral acid neutralization potential (ANP) minus sulfide-sulfur mineral acid generation potential (AGP) = net calcium carbonate (NCC)). Additionally, the test method has utility to identify the amount of organic carbon contained in gold ores so that potential for preg robbing can be identified and rectified through established pretreatment methods prior to cyanidation. (Warning8212;Pyrolysis pretreatment at 550 x00B0;C has a potential to thermally decompose some carbonate minerals: (lic">1) transition metal carbonates (for example, siderite, FeCO₃, and rhodochrosite, MnCO₃) decompose, yielding carbon dioxide, CO₂, in the range of 220 x00B0;C to 520 x00B0;C; (lic">2) calcite decomposes slightly between 300 x00B0;C and 500 x00B0;C, although most decomposition occurs above 550 x00B0;C; (lic">3) dolomite decomposes at 800 x00B0;C to 900 x00B0;C (Hammack, 1994, p. 440). )

These test methods also may be used for the classification of rock to be used in construction, where the potential to generate acid under environmental conditions exists.

It is assumed that the users of these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed. Appropriate quality control practices such as those described in Guide lidateSubscription.cgi?E882-HTML">E882 must be followed.

1.1 These test methods cover the determination of total carbon and sulfur and acid-base characteristics in metal bearing ores and related materials such as leach residues, tailings, and waste rock within the following ranges:

1.2 The quantitative ranges for the partial decomposition test methods are dependent on the mineralogy of the samples being tested. The user of these test methods is advised to conduct an interlaboratory study in accordance with Practice lidateSubscription.cgi?E1601-HTML">E1601 on the test methods selected for use at a particular mining site, in order to establish the quantitative ranges for these test methods on a site-specific basis.