共查询到18条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
5.
城口锰矿发现于50年代末,大量地质工作始于1966年,1978年结束矿区初步勘探工作。经大量地质工作证实,该区为一大型沉积锰矿床;其中,地表浅部次生氧化矿石已于1977年被开发利用,加工生产的锰粉畅销省内外,收到了显著的经济和社会效益,对振兴该县经济起到了重要作用。城口锰矿地处四川东北边缘大巴山区, 相似文献
6.
7.
8.
碱性工业废水的治理技术 总被引:3,自引:0,他引:3
本文介绍了利用我国目前大量排放的印染、造纸等碱性工业废水进行中小型燃煤锅炉烟气脱硫的技术。该技术投资少、运行费用低,具有较好的经济效益 相似文献
9.
10.
11.
S. C. Ray 《Resources Policy》1978,4(4):289-294
Though India's iron ore and manganese exports are a major source of foreign exchange, the continent lacks sufficient reserves of many important minerals, or has only recently exploited known reserves on an adequate scale. This article reviews India's mineral resources and points out trends in exploration and production. 相似文献
12.
Although Brazil is well endowed with natural resources, some of these are unexploited due to poor communications and political instability. The authors review present government policy and the situation with regard to oil and gas, iron ore, manganese and steel and other minerals, and conclude that Brazil has a bright economic future. 相似文献
13.
主要以某公司9000t/a碱锰型电解二氧化锰技改项目环境影响评价为例,结合验收监测数据,简要介绍碱锰型电解二氧化锰生产的环境影响与环保措施.该公司采用氧化锰矿和硫铁矿混合硫酸溶液浸出--电解的生产工艺生产碱锰型电解二氧化锰,生产过程中大气污染源主要有锅炉排放的烟气,化合、电解工序产生的硫酸雾;生产废水主要有锅炉除尘废水、漂洗水及炭黑生产废水;废渣主要是压滤锰渣. 相似文献
14.
A. Fossdal E. Bakken B.A. Øye C. Schøning I. Kaus T. Mokkelbost Y. Larring 《International Journal of Greenhouse Gas Control》2011,5(3):483-488
Norwegian industrial tailings and by-products, as well as naturally occurring minerals and ores have been surveyed with the purpose of identifying candidate oxygen carrier materials for use in a chemical looping combustion process. Nine materials, based on manganese and/or iron oxide, were selected for an initial screening test; six were deemed promising and were hence investigated further. Thermogravimetric experiments were performed to investigate the oxygen capacity, the reaction kinetics and reversibility of the oxygen absorption reaction. A manganese ore with a reversible capacity of 4.9 wt% oxygen at 1000 °C was selected as the most promising for chemical looping combustion applications. This material was modified by addition of calcia to explore the possibility of enhancing the kinetic, catalytic and mechanical properties. The addition of excess calcium relative to manganese resulted in formation of calcium manganite and related phases. The oxygen capacity of the modified material was 4.5 wt% at 1000 °C, but it has potential advantages in terms of kinetics and chemical and mechanical stability relative to the pure ore. 相似文献
15.
16.
17.
This paper summarizes the main physical and economic features of manganese nodules, cobalt-rich manganese crusts and marine polymetallic sulfide deposits in the Pacific region. The most favourable areas for deposits of commerical interest are shown on a map of the Pacific. The gross metal sales values of hypothetical mines are compared to estimated size of world metal markets in the year 2000. It is suggested that a prudent policy for the major developed-country governments is to support research on those marine minerals that appear to have the potential to become a major source of minerals in the next century. 相似文献
18.
At first ‘sustainable mining’ could be perceived as a paradox—minerals are widely held to be finite resources with rising consumption causing pressure on known resources. The true sustainability of mineral resources, however, is a much more complex picture and involves exploration, technology, economics, social and environmental issues, and advancing scientific knowledge—predicting future sustainability is therefore not a simple task. This paper presents the results from a landmark study on historical trends in Australian mining, including ore milled, ore grades, open cut versus underground mining, overburden/waste rock and economic resources. When complete data sets are compiled for specific metals, particular issues stand out with respect to sustainability—technological breakthroughs (e.g. flotation, carbon-in-pulp), new discoveries (e.g. uranium or U), price changes (e.g. Au, boom/bust cycles), social issues (e.g. strikes), etc. All of these issues are of prime importance in moving towards a semi-quantitative sustainability model of mineral resources and the mining industry. For the future, critical issues will continue to be declining ore grades (also ore quality and impurities), increased waste rock and associated liabilities, known economic resources, potential breakthrough technologies, and broader environmental constraints (e.g. carbon costs, water). For this latter area, many companies now report annually on sustainability performance—facilitating analysis of environmental sustainability with respect to production performance. By linking these two commonly disparate aspects—mining production and environmental/sustainability data—it becomes possible to better understand environmental sustainability and predict future constraints such as water requirements, greenhouse emissions, energy and reagent inputs, and the like. This paper will therefore present a range of fundamental data and issues which help towards quantifying the resource and environmental sustainability of mining—with critical implications for the mining industry and society as a whole. 相似文献