1.1 本动力学测试指南涵盖了标准实验室风化程序、测试方法的解释和合作管理 D5744 . 该指南提出了分析和解释测试方法产生的数据的策略 D5744 采矿废石、冶金加工废物和矿石。 1.1.1 测试的合作管理涉及利益相关者在定义测试目标、分析要求、规划测试持续时间的初始估计以及在决策点讨论结果以确定测试周期是否需要延长以及残留物的处置方面达成一致。 1.2 湿度电池测试（HCT）增强了指定质量固体材料样品的水浸出液中反应产物的运输。标准条件允许在解释结果期间比较材料的相对反应性。 1.3 HCT测量风化产物的质量释放率。 可溶性风化产物通过每周进行和收集的固定体积水浸出进行动员。分析渗滤液样品的pH值、碱度/酸度、电导率、硫酸盐和其他选定的分析物，这些分析物可能在特定采矿或冶金加工现场的环境排水中进行调节。 1.4 本指南涵盖了为获得以下目标的结果而进行的标准湿度电池测试的解释: 指南和目标 小节 A–静态测试结果的确认 5. – 6. B–反应性和渗滤液质量评估 用于分离矿山、处理废物， 或 矿石 7. – 8. C–中和质量评估 可与产生的 酸的 9 – 10 1.5 本指南旨在促进试验方法的使用 D5744 为满足冶金加工产品、采矿废石和矿石的动力学测试监管要求，其尺寸应通过6级。 3毫米（0.25英寸）Tyler屏幕。 1.5.1 标准湿度电池测试结果的解释有助于分离矿石和废物，并设计适当的储存和处置设施。 1.6 标准的实验室间测试 D5744 湿度电池被限制在矿山废石中。实验室间测试数据不支持将本指南应用于冶金加工废物（例如，选矿尾矿）。试验方法B D5744 然而，已发现对冶金产品的测试有用，本指南也有助于解释这些结果 ( 1. ) . 2. 1.7 本指南旨在描述根据试验方法解释固体材料标准实验室风化结果的各种程序 D5744 . 它没有描述可能与其应用相关的所有类型的采样和分析要求，也没有描述解释结果的所有程序。 1.8 以国际单位制表示的数值应视为标准值。本指南中不包括其他测量单位。 1.8.1 例外情况- 括号中给出的值仅供参考。 1.9 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.10 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 HCT数据的使用和测试目标- 实验室风化试验方法( D5744 )生成的数据可用于: 4.1.1 确定固体材料是否会产生酸性、碱性或中性流出物； 4.1.2 识别废水中代表在指定时间段内形成的溶解风化产物的溶质，并告知用户其在拟议操作条件下对采矿或冶金加工现场产生环境影响的可能性； 4.1.3 确定溶质释放的质量；和 4.1.4 在严格控制的试验条件下，测定溶质释放（从固体中释放到废水中）的速率，以与其他材料进行比较。 4.1.5 这些方法基于详细的矿物学工作和静态测试，为解释HCT结果提供了基础。 4.1.6 详细的矿物学工作可能会导致审查人员怀疑酸中和电位（ANP）或酸生成电位（AGP）矿物的可用性有问题，这将是解释HCT结果和有关测试持续时间的决定的一个重要因素。 4.2 实验室风化过程产生的数据解释可用于实现以下目标: 4.2.1 确定排水质量的变化作为单个矿山岩石岩性内成分变化的函数（例如，硫化铁和钙加碳酸镁含量）； 4.2.2 在保持排水pH值为的情况下，测定样品可中和的酸量 ≥ 6.0在试验条件下； 4.2.3 估计矿岩风化速率，以帮助预测矿岩的环境行为；和 4.2.4 确定矿岩风化速率，以帮助现场特定动力学测试的实验设计。 4.3 解释方法- 指南A、B和C旨在作为示例，说明在制定确定湿度传感器合理目标的结构方法时应考虑什么，以及涉及利益相关者的HCT合作管理的一些可能标准。 4.3.1 在规划阶段，也可以使用一种方法来建立湿度单元测试的决策点，而不是终点。指南A、B和C是技术和相关标准的示例，包括一些帮助解释湿度电池测试生成的数据的方法。可以在规划阶段建立决策点，使利益相关者有机会审查结果，并决定是否需要额外的风化循环来满足测试目标。 4.3.2 HCT持续超过决策点可能会或可能不会提供有关被测材料中氧化和金属浸出加速或减速的重要信息。 4.3.3 较长HCT中更详细的渗滤液信息可能是设计AMP中所述的废物管理或水处理设施的关键信息，但商定的测试目标终点将允许作出推进采矿规划和许可的决定。 4.3.4 实验室风化过程提供了有利于固体材料成分氧化的条件，并增强了产生的每周废水中所含风化反应产物的运输。这是通过控制固体材料样品暴露于诸如反应环境温度和水和氧气的应用速率等环境参数来实现的。 4.3.5 由于有效去除反应产物对于在过程中跟踪矿物溶解速率至关重要，因此实验室浸出量很大，每单位质量的岩石可以促进风化反应产物从矿山岩石样品中的冲洗。通过与现场试验进行比较，对实验室动力学试验的解释表明，在实验室风化试验中，矿物溶解的反应产物在单位重量和单位时间内不断释放 ( 2. ) . 例如，据报告，在金属矿岩石的实验室试验中观察到的硫酸盐释放率是小型岩石的3到8倍- 德卢斯复杂岩石的比例现场试验桩 ( 3. ) 是太古宙绿岩小型现场测试桩的2到20倍 ( 4. ) . 当实验室速率与从操作废石堆中测量的现场速率相比较时，预计会有更大的增加。 4.4 在某些情况下，根据HCT结果确定终止特定电池风化循环的决策标准可能有用，但仍需继续将HCT测试风化循环维持更长时间。 4.4.1 在其他情况下，可能需要有重复的HCT，并将其用作决策点和后续反应产物破坏性评估的基础。 4.4.1.1 可以维护复制单元格以确认决策依据，并在必要时用于更新AMP和财务担保。 4.4.2 该方法支持有关矿山废物管理和规划的决策，包括AMP。 4. 4.3 这种方法不一定解决准确预测长期金属浸出和排水质量的需要，但建议将其作为一种工具，用于决定如何进行测试，以确定如何处理和监测矿石和废物，以及特定场地和材料相关决策中涉及的潜在风险水平。 4.5 长时间持续HCT风化循环也可能提供更高水平的确定性。 4.6 根据现场特定的风险资源和废料行为，延长HCT风化循环时间可能是利益相关者群体在评估HCT时的一个重要考虑因素。 4.7 由于矿山通常涉及大量废石，这些废石将在较长时间内被至少一定量的事故降水淋滤，因此几乎总是需要对废物设施的性能进行持续监测，包括任何产生的废水或渗滤液，作为许可证批准的条件。 4.8 许可设施的性能监测可以是开发湿度电池性能数据库的关键因素，也可以支持本文提出的不断发展的HCT风化循环持续时间标准和方法。 4.9 可以以标准格式开发湿度电池性能数据库，以便根据公共可用信息将实验室风化结果与现场废物设施排水性能进行比较。 4.9.1 下面以具有可能目标和标准的模型方法为例，帮助解释HCT结果。 4.10 具体方法要求和标准（硫、硫化物、碳酸盐、pH值、硫酸盐释放等）的变化将取决于现场特定目标、矿床矿物学和特征，包括利益相关者同意的各种静态测试结果和管理计划。 4.10.1 无论现场特定的利益相关者目标如何，金属释放率的不稳定性都强烈建议继续进行风化循环测试。 4.10.2 无论遵循何种决策过程，许可决定的最终责任在于许可机构，而最终环境责任和经营责任在于矿业公司。 4.11 建议将这些方法作为模型，供相关利益相关者使用，以确定何时适合安排和延长HCT风化周期以及如何处理残留物。 4.12 具体参数（硫、CaCO 3. ，所以 4. –2 所涉及的释放速率、金属释放速率等）可能会因现场特定因素而有所不同，这些因素可能包括岩性、岩石学和矿物学、气候、监管方法、单元的环境风险以及正在评估的矿床类型。 4.13 为管理HCT持续时间而选择的标准应依赖于参数的组合，因为基于单一参数值（如硫百分比）的任何标准都不可靠 ( 5. ) . 4.14 提出的方法中的值仅作为示例，实际的细胞管理标准将由利益相关者在特定地点的基础上进行审查和商定。 4.15 所选的特定参数和值可能因现场特定因素而有很大差异，其中可能包括环境风险。由利益相关者修改并使用该方法来制定满足其现场特定要求的目标，并使用其修改来就测试持续时间达成共识。 4.16 以下决策标准（硫化物-硫定量限值、硫酸盐释放率、pH值和稳态持续时间）必须在现场/项目特定的基础上制定，考虑因素包括现场特定的岩性、矿物学、微量金属特征和潜在的环境风险。以下指南中给出的值仅为示例标准； 由利益相关者管理自己的标准。

1.1 This kinetic test guide covers interpretation and cooperative management of a standard laboratory weathering procedure, Test Method D5744 . The guide suggests strategies for analysis and interpretation of data produced by Test Method D5744 on mining waste rock, metallurgical processing wastes, and ores. 1.1.1 Cooperative management of the testing involves agreement of stakeholders in defining the objectives of the testing, analytical requirements, planning the initial estimate of duration of the testing, and discussion of the results at decision points to determine if the testing period needs to be extended and the disposition of the residues. 1.2 The humidity cell test (HCT) enhances reaction product transport in the aqueous leach of a solid material sample of specified mass. Standard conditions allow comparison of the relative reactivity of materials during interpretation of results. 1.3 The HCT measures rates of weathering product mass release. Soluble weathering products are mobilized by a fixed-volume aqueous leach that is performed and collected weekly. Leachate samples are analyzed for pH, alkalinity/acidity, specific conductance, sulfates, and other selected analytes which may be regulated in the environmental drainage at a particular mining or metallurgical processing site. 1.4 This guide covers the interpretation of standard humidity cell tests conducted to obtain results for the following objectives: Guide and Objective Sections A – Confirmation of Static Testing Results 5 – 6 B – Evaluation of Reactivity and Leachate Quality for Segregating Mine, Processing Waste, or Ore 7 – 8 C – Evaluation of Quality of Neutralization Potential Available to React with Produced Acid 9 – 10 1.5 This guide is intended to facilitate use of Test Method D5744 to meet kinetic testing regulatory requirements for metallurgical processing products, mining waste rock, and ores sized to pass a 6.3-mm (0.25-in.) Tyler screen. 1.5.1 Interpretation of standard humidity cell test results has been found to be useful for segregation of ore and waste and design of proper stockpiling and disposal facilities. 1.6 Interlaboratory testing of the standard D5744 humidity cell has been confined to mine waste rock. Application of this guide to metallurgical processing waste (for example, mill process tailings) is not supported by interlaboratory test data. Method B of Test Method D5744 , however, has been found useful for testing of metallurgical products, and this guide is also useful for interpretation of those results ( 1 ) . 2 1.7 This guide is intended to describe various procedures for interpreting the results from standard laboratory weathering of solid materials in accordance with Test Method D5744 . It does not describe all types of sampling and analytical requirements that may be associated with its application, nor all procedures for interpretation of results. 1.8 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this guide. 1.8.1 Exception— The values given in parentheses are for information only. 1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.10 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Use of HCT Data and Testing Objectives— The laboratory weathering test method ( D5744 ) generates data that can be used to: 4.1.1 Determine whether a solid material will produce an acidic, alkaline, or neutral effluent; 4.1.2 Identify solutes in the effluent that represent dissolved weathering products formed during a specified period of time, and inform the user of their potential to produce environmental impacts at a mining or metallurgical processing site under proposed operating conditions; 4.1.3 Determine the mass of solute release; and 4.1.4 Determine the rate at which solutes are released (from the solids into the effluent) under the closely controlled conditions of the test for comparison to other materials. 4.1.5 These approaches are based on the existence of detailed mineralogical work and static tests that provide a basis for interpreting HCT results. 4.1.6 Detailed mineralogical work might lead a reviewer to suspect either acid neutralization potential (ANP) or acid generation potential (AGP) minerals have questionable availability, which would be a significant factor in interpreting HCT results and decisions concerning test duration. 4.2 Interpretation of data generated by the laboratory weathering procedure can be used to address the following objectives: 4.2.1 Determine the variation of drainage quality as a function of compositional variations (for example, iron sulfide and calcium plus magnesium carbonate contents) within individual mine rock lithologies; 4.2.2 Determine the amount of acid that can be neutralized by the sample while maintaining a drainage pH of ≥ 6.0 under the conditions of the test; 4.2.3 Estimate mine rock weathering rates to aid in predicting the environmental behavior of mine rock; and 4.2.4 Determine mine rock weathering rates to aid in experimental design of site-specific kinetic tests. 4.3 Interpretation Approaches— Guides A, B, and C are intended as examples of what to consider in developing an approach for determining how reasonable objectives for humidity cells might be structured, and some possible criteria for cooperative management of HCTs involving stakeholders. 4.3.1 It is also possible to use an approach to establish a decision point, rather than an end point, to the humidity cell test during the planning stage. Guides A, B, and C are examples of techniques and associated criteria comprising some approaches to help interpret data generated by humidity cell tests. Decision points can be established during the planning stage to allow stakeholders an opportunity to review the results and decide if additional weathering cycles are needed to meet the objectives of the testing. 4.3.2 Continuation of the HCT beyond the decision point may or may not provide important information regarding the acceleration or deceleration of oxidation and metal leaching in the material being tested. 4.3.3 More detailed leachate information from a longer HCT may be critical information for designing waste management or water treatment facilities as accounted for in an AMP, but an agreed-upon endpoint of test objectives would allow for a decision that advances mine planning and permitting. 4.3.4 The laboratory weathering procedure provides conditions conducive to oxidation of solid material constituents and enhances the transport of weathering reaction products contained in the resulting weekly effluent. This is accomplished by controlling the exposure of the solid material sample to such environmental parameters as reaction environment temperature and application rate of water and oxygen. 4.3.5 Because efficient removal of reaction products is vital to track mineral dissolution rates during the procedure, laboratory leach volumes are large per unit mass of rock to promote the rinsing of weathering reaction products from the mine rock sample. Interpretation of laboratory kinetic tests by comparison with field tests has shown that more reaction products from mineral dissolution are consistently released per unit weight and unit time in laboratory weathering tests ( 2 ) . For example, sulfate release rates observed in laboratory tests of metal mine rock have been reported to be three to eight times those for small-scale field test piles of Duluth complex rock ( 3 ) , and from two to 20 times those for small-scale field test piles of Archean greenstone rock ( 4 ) . A greater increase is anticipated when laboratory rates are compared with field rates measured from operational waste rock piles. 4.4 In some cases, it may be useful to establish criteria for a decision to end the weathering cycles for a particular cell based on HCT results but still continue to maintain the HCT test weathering cycles for a longer duration. 4.4.1 In other cases, it might be useful to have duplicate HCTs and use one as a basis for a decision point and subsequent destructive evaluation of reaction products. 4.4.1.1 The duplicate cell could be maintained to confirm the basis for the decision and be used to update the AMP and financial guarantee, if necessary. 4.4.2 This approach supports a decision concerning mine waste management and planning, including an AMP. 4.4.3 This approach does not necessarily resolve the need for accurate prediction of long-term metal leaching and drainage quality, but is recommended as a tool for making decisions on how to conduct testing with the objective of determining how ore and waste will be handled and monitored, and the potential level of risk involved in related decisions for specific sites and materials. 4.5 Continuing HCT weathering cycles for an extended period of time may also provide a higher level of certainty. 4.6 Depending on the site-specific resources at risk and behavior of waste materials, an extended HCT weathering cycle duration may be an important consideration for stakeholder groups to use in evaluating HCTs. 4.7 As a mine typically involves very large quantities of waste rock, which will be leached by at least some amount of incident precipitation for extended times, ongoing monitoring of waste facility performance, including any produced effluent or leachate, is almost always required as a condition of permit approval. 4.8 Performance monitoring of permitted facilities can be a critical element in the development of a humidity cell performance database, as well as support for the evolving HCT weathering cycle duration criteria and approach proposed here. 4.9 A humidity cell performance database could be developed in a standard format to allow comparison of laboratory weathering results with drainage from field waste facility performance, based on publicly available information. 4.9.1 A model approach with possible objectives and criteria are presented below as examples to help interpret HCT results. 4.10 Variations in specific approach requirements and criteria (% sulfur, sulfide sulfur, carbonate, pH, sulfate release, etc.) will depend on the site-specific objectives, deposit mineralogy, and characterization, including various static test results and management plans agreed upon by stakeholders. 4.10.1 Regardless of the site-specific stakeholder objectives, instability in metal release rates should strongly suggest continuation of weathering cycle testing. 4.10.2 Regardless of the decision process followed, the ultimate responsibility for the permitting decision lies with the permitting agency(s), and the ultimate environmental liability and operating responsibility lies with the mining company. 4.11 These approaches are suggested as a model to be used by the involved stakeholders for their determination of when it is appropriate to schedule and extend HCT weathering cycles and how to treat the residues. 4.12 The specific parameters (sulfur, CaCO 3 , SO 4 –2 release rates, metal release rates, etc.) involved will likely vary depending on site-specific factors, which could include the lithology, petrology and mineralogy, climate, regulatory approach, environmental risk for the units, and ore deposit type being evaluated. 4.13 The criteria selected for management of the duration of HCTs should rely on a combination of parameters, as any criteria based on a single parameter value like % sulfur will not be reliable ( 5 ) . 4.14 The values in the approaches presented are chosen only as examples, and actual cell management criteria are intended to be reviewed and agreed upon by the stakeholders, on a site-specific basis. 4.15 The specific parameters and values selected might vary considerably depending on site-specific factors, which might include environmental risk. It is up to the stakeholders to modify and use this approach to develop objectives which meet the specific requirements at their site and to use their modifications to reach a consensus on test duration. 4.16 The following decision criteria (sulfide sulfur quantitative limit, sulfate release rates, pH, and steady state duration) must be developed on a site/project-specific basis based on considerations including site-specific lithology, mineralogy, trace metal characteristics, and potential environmental risks. The values given in the following guides are merely example criteria; it is up to the stakeholders to manage their own criteria.