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提要镉对耕地和人体有严重危害,与世界大多数磷矿相异,我国的磷矿资源镉含量低,是生产磷肥的优质资源.建议尽量减少出口,加大低品位开发利用,加强保护,同时提高磷肥的利用率. 相似文献
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《西北地质》1977,(2)
关于低品位磷矿利用问题,地质系统进行了长期的大量工作,现在我们只谈谈有关生产利用的简要情况,供大家参考,有错误或不准确的地方,请批评指正。首先谈谈当前低品位磷矿利用的重要性。根据截止一九七二年磷矿资料统计,品位(指五氧化二磷含量)>25%磷矿储量的99.5%集中在云贵川湘鄂五省;品位10-25%磷矿储量的95.5%也集中在上述五省;而品位<10%磷矿储量的92.5%则分布在五省以外的广大地区,尤其“三北地区”磷矿储量的96.6%是属于品位相似文献
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利用2009年贵州省矿产资源利用现状调查磷矿成果数据库,以核查块段为基础,通过块段品位和块段资源储量数据对全省磷矿核查矿区平均品位统计,掌握了全省核查矿区高中低品位磷矿石的分布,并对块段品位数据区间分段统计吨位频率,建立了寒武系磷矿层和震旦系磷矿层品位-吨位模型。统计结果表明,寒武系磷矿层的矿区平均品位总体较低,震旦系磷矿层矿区平均品位总体较高,全省磷矿吨位频率服从正态分布,寒武系磷矿层吨位峰值区间较窄,震旦系磷矿层吨位峰值区间较宽。综合研究表明,开阳-息烽片区和瓮安-福泉片区震旦系磷矿层高品位矿石资源储量多,矿石质量好,可作为全省磷矿资源开发利用布局的重点地区,铜仁-松桃片区和清镇-织金片区寒武系磷矿层品位低、贫矿石资源储量多,矿石质量差,应加强低品位矿石和贫矿石的选矿技术研究。 相似文献
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<正> 目前我国北方已知磷矿一般品位低,制磷肥所需的矿石大多数靠南磷北调。北方有不少磷矿床储量很大,埋藏很浅,有的甚至已出露地表,适于露天开采。矿石中的有用矿物多为结晶颗粒粗大的磷灰石,容易选别富集,开发它们在技术方面一般不存在难题;但是,选矿比大。如平型关磷矿选矿比为十,因而经济上是否合算就成了这类磷矿开发的关键。前不久,我们参加了山西省平型关磷矿选矿厂试生产,对试生产的磷矿成本进行了综合考察。通过考察我们认为用此类含P_2O_5 3.44%的磷矿石选矿、制肥,只要加强企 相似文献
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选铁尾矿综合回收利用低品位磷、钛、钴技术工业化应用 总被引:2,自引:0,他引:2
丰宁招兵沟低品位磷矿特点为中品位磁铁矿、低品位磷矿等共生。通过对选铁尾矿的研究,确定了常温无碱浮选回收磷矿物、合理的重-磁选联合工艺回收钛铁矿物、浮选工艺回收硫钴矿物的选矿工艺路线,并实现了工业化。 相似文献
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河北丰宁招兵沟铁磷矿床为赋存于太古宇绿岩带内低品位特大型矿床。含磷岩系具近似绿岩带下部火山岩群的特点。铁磷矿体呈层状,大的透镜状产出,还伴生Ti、V 等有益元素。矿石选矿回收性能良好。通过对该区当前内生低品位铁磷矿开采情况的调查,认为我国北方低品位铁磷矿综合利用前景乐观。 相似文献
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《吉林大学学报(地球科学版)》2015,(Z1)
<正>中国是磷矿资源生产大国,也是磷矿资源消耗大国,由于中国磷肥产业的迅速发展,磷矿石资源消耗速度不断加大,据预测,10年之后中国的富矿将消耗殆尽,形势十分严峻。目前,在我国磷矿开发利用主要用硫酸处理磷矿物的湿法磷酸工艺,该工艺不仅产生大量的磷石膏工业废弃物,而且对原料的品位要求 相似文献
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磷是生物体所必需的营养元素,因其不可替代性及未来迅速枯竭性,被中、德、日、英、美等国相继列入战略性矿产资源清单。全球磷矿石资源丰富,但是分布极不均衡,70%以上集中在非洲,著名的磷矿资源国有摩洛哥及西撒哈拉地区,阿尔及利亚、南非、埃及、突尼斯、塞内加尔、多哥等国磷矿储量也较为丰富,非洲可谓是全球磷矿储量的绝对担当。矿床类型主要有沉积型、岩浆型和鸟粪型,以沉积型为主,同时具有储量大、品位高、伴生有其他具有经济价值元素等特点。近年来,非洲已成为全球重要磷矿产地与供应地,目前,在非洲从事磷矿勘查开发的矿业公司以本土矿业公司为主,摩洛哥磷酸盐集团是全球上最大的磷酸盐生产和出口商。非洲磷矿石主要出口大国为摩洛哥、埃及、多哥、阿尔及利亚等;出口至印度、印度尼西、墨西哥、巴西等国家。未来,非洲仍将为全球主要磷矿供应地之一,并将扮演更加重要的角色。 相似文献
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Physical and thermal treatment of phosphate ores — An overview 总被引:1,自引:0,他引:1
The annual consumption of phosphate rock approached 150 million tons. The marketable phosphate is usually 30% P2O5 or higher. The run-of-mine material is mostly of lower grade which needs processing or upgrading. The processing techniques of phosphate ores depend mostly on the type of associated gangue minerals present in the mined rock. In some cases, simple, inexpensive techniques are enough to produce the required grade. For example, crushing and screening is used to get rid of the coarse hard siliceous material, and attrition scrubbing and desliming is used to remove the clayey fine fraction. If silica is the main gangue material, single-stage or double-stage flotation is the conventional mineral processing technique used in this case. If the ore is igneous carbonatitic alkaline or ultra basic phosphate deposit, crushing, grinding, scrubbing, and flotation associated with other steps such as magnetic and/or gravity separation is proved to be successful in upgrading this type of ore. The sedimentary phosphate ores having carbonate-apatite as the main phosphate minerals and containing carbonates (calcite and/or dolomite) represent a challenge in the field of phosphate concentration due to similarity in the physico-chemical properties of surfaces of the ore constituents. Also, if considerable amount of organic matter constitutes the main gangue material, upgrading of the ore becomes difficult. New flotation systems (techniques and reagents) are being developed to treat these challenging phosphate ores. Furthermore, calcination is another solution for upgrading these difficult-to-treat types of ores. However, calcination is indicted with some controversial drawbacks. This overview discusses and summarizes the State-of-the-Art and the existing efforts to overcome these problems and to produce a high-grade phosphate product suitable for fertilizers and other phosphate compounds. 相似文献
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江苏沉积变质型磷矿带位于大别—苏鲁造山带东段,锦屏岩组是带内唯一赋矿地层,因其遭受过多期强烈变形变质作用改造,层序杂乱,勘查难度大。通过对磷矿带内各矿床地质特征的研究,查明区域早期复式褶皱构造控制着带内磷矿体的空间分布、厚度及品位,晚期复式褶皱构造制约着含磷岩系的总体分布;结合区域及各矿区的地球物理资料,建立了覆盖区隐伏磷矿的地球物理勘查模型,认为在面积性重力高异常区内,局部叠加剩余重力高异常,且伴随平缓正磁异常的地段是隐伏磷矿勘查的首选目标;通过钻探进行验证,在此基础上圈定了3处找矿靶区,为后续磷矿勘查指明了方向。 相似文献
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The Postmasburg Mn/Fe-ores occur exclusively in dolomitic Precambrian sinkhole structures with siliceous breccias and shales as hostrocks. The main manganese minerals are braunite and bixbyite, apart from secondary alteration products of the psilomelane-manganomelane family. Various generations of ore minerals could be identified. The ore mineralization is subdivided into three different genetic types. They are classified either as pure karst deposits or as combined formations of karst origin and shallow marine sedimentation due to the transgression of the Banded Iron Formation (BIF) sea. Post-sedimentary metamorphism is identified as very low grade. The development of the different ore types is illustrated schematically. 相似文献
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D.Vaman Rao M.K. Narayanan U.B. Nayak K. Ananthapadmanabhan P. Somasundaran 《International Journal of Mineral Processing》1985,14(1):57-66
Separation of Mussorie rock phosphate (P2O5 = 20%) from Uttar Pradesh, India, containing pyrite, calcite and other carbonaceous impurities by flotation has been successfully attempted to upgrade the phosphate values. Based on Hallimond cell flotation results of single and synthetic mineral mixtures of calcite and apatite using oleic acid and potassium phosphate, conditions were obtained for the separation of calcite from apatite which is considered to be the most difficult step in the beneficiation of calcareous phosphates. Further studies using 250 g of the mineral (?60 +150 and ?150 mesh fractions, deslimed) in laboratory size Fagergren subaeration machine employed a stagewise flotation viz. carbonaceous materials using terpineol, pyrite using potassium-ethyl xanthate and calcite using oleic acid respectively. Separation was, however, found to be unsatisfactory in the absence of a depressant.Among starch, hydrofluosilicic acid and dipotassium hydrogen phosphate, which were tried as depressants for apatite in the final flotation stage, dipotassium hydrogen phosphate proved to be superior to others. However, the tests with the above fractions did not yield the required grade. This was possibly due to insufficient liberation of the phosphate mineral from the ore body and different experimental conditions due to scale up operations. Experiments conducted using ?200 mesh deslimed fractions has yielded an acceptable grade of 27.6% P2O5 with a recovery of about 60%. The results have been explained in terms of the specific adsorption characteristics of phosphate ions on apatite and the liberation size of the mineral. 相似文献
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磷矿伴生稀土元素是获取稀土资源的重要途径。我国磷块岩型稀土矿分布广,稀土含量高,具有综合回收价值,是仅次于独立稀土矿床的伴生稀土资源。本文主要研究云南安宁磷矿中稀土元素分布规律和赋存状态,并比较了磷矿石中稀土元素总量与磷含量的关系,结果表明磷矿石中稀土氧化物总量为72×10-6~1 050×10-6,与磷含量呈一定的正相关关系。另外通过光学显微镜及电子显微镜观察发现,安宁磷矿中缺乏独立的稀土矿物,只在部分海绿石中找到了独立的稀土矿物(可能为独居石和褐帘石)。LA-ICP-MS分析结果表明,胶磷矿单矿物稀土元素含量在770×10-6~920×10-6之间,而白云石单矿物稀土元素含量均低于34×10-6,石英单矿物的稀土元素平均含量为180×10-6。由于部分独立的稀土矿物的存在,海绿石矿物中稀土元素总量可高达2 947.27×10-6~3 159.87×10-6。综合分析结果表明,安宁磷矿中稀土元素主要以类质同像的... 相似文献
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文章利用Vulcan和Datamine三维可视化软件建立了虎头崖铅锌多金属矿床矿体的三维实体模型、块体模型及地层三维实体模型;运用地质统计学方法分析了虎头崖矿区67线以东和117线以西矿体的Pb,Zn品位空间变化结构,得出搜索椭球体,实现了虎头崖铅锌多金属矿床矿体、地层形态和铅锌品位变化形态的空间分布展示;结合三维建模结果和铅锌矿体空间变化结构,总结出矿体空间分布规律,并用三维可视化软件对矿体分布规律进行显示,指导隐伏矿体的预测,寻找有利的找矿部位。 相似文献