低品位磷矿石选矿的可行性分析

引言 合肥四方磷复肥有限责任公司原是一个矿肥结合企业,年选精矿(P2O5≥28%)3万t左右,历经数年的发展,目前拥有10万t磷铵、15万t普钙、10万t复合肥、6万t硫酸的年生产能力,磷矿石(P2O5≥30%)需求量在25万t/a左右.但近两年因磷矿石采购困难,磷矿石年供应缺口量在6万t左右,严重影响生产经营.     

江山北蕉矿低品位矿石的开发利用

本文通过浙江江山南方水泥有限公司合理利用北蕉石灰石矿低品位矿石的初步偿试,在设计中从技术上考虑怎样充分利用当地低钙高硅高镁矿产资源。为我国水泥行业探索了一条利用低钙高硅高镁矿产资源和低品位矿产资源的综合利用提供有益的尝试。     

低品位磷矿选矿破解资源瓶颈

中低品位硅钙质胶磷矿的选矿是一个世界性的难题。云南磷化集团公司、武汉工程大学、中蓝连海设计研究院合作开发出系列新型选矿药剂和配套新工艺,并将其产业化,为云南省乃至全国中低品位磷资源开发利用开辟了一条有效途径,总体技术水平达到国际领先,既解决了稀缺资源可利用问题,又具有良好的环保节能效果。     

低品位铜矿选矿试验研究

随着国民经济的高速发展,我国对铜矿资源的需求量在大幅度增加。而我国铜矿山采选能力和冶炼生产能力则与之极不对称;自产铜矿不能满足国内生产需求。多年来,我国大量进口铜精矿。根据海关统计,2005年的进口量为406万t,占世界铜精矿贸易量的1／4。而到2008年进口量达到519万t,占世界铜精矿贸易量的1／3。宁强县广坪镇大茅坪铜矿有限责任公司位于陕西省宁强县广坪镇大茅坪村。地质勘查报告表明,该矿石主要有黄铜矿和黄铁矿等矿物,脉石矿物有碳酸钙、石英、泥质、绿泥土、绢云母等。     

云南尖山低品位磷矿特征研究及工业应用

对云南尖山磷矿堆存的低品位混合型磷块岩进行矿石特性研究,分析磷矿石的化学组分、矿物组成及结构、嵌布粒度、矿物单体解离特征及矿石可选性。通过实验室不同选矿工艺研究及对比,最终选择与碳酸盐型胶磷矿配矿浮选生产应用。配矿浮选采用反浮选一次粗选、一次精选、一次扫选工艺,可获得精矿w(P₂O₅) 28.04%、w(MgO) 0.93%、产率71.87%、P₂O₅回收率90.37%的选矿指标。     

粉煤灰、低品位铝矿直接生产工业氧化铝

0引言 近年来我国电解铝产能增长过快,造成电解铝原料工业氧化铝供求矛盾加剧,对外依存度不断上升,目前我国约60%的工业氧化铝依赖进口.因此,寻找氧化铝新资源和生产新方法已刻不容缓.固体废弃物-粉煤灰和低品位铝矿可通过酸或碱、或酸碱联合溶出生产工业氧化铝,具有生产成本低,质量稳定等优点,为解决我国铝工业资源短缺这一难题提供了一条路径.     

低品位钾长石选矿提纯试验研究

通过岩矿分析、扫描电镜和化学分析等方法对河北某地区低品位长石进行原矿特性分析,采用“破碎-磨矿-分级-弱磁-强磁-浮选”的试验工艺流程,研究表明:精矿中钾钠含量可达12.74％、Fe2O3含量为0.08％,可满足工业特极品要求.     

高硅低品位磷矿选矿试验研究

某地高硅低品位砂质磷矿细粒级矿中有用矿物质量分数低而倍半氧化物质量分数高,直接浮选矿浆发粘,有用矿物和杂质难于分离,采用分级浮选工艺流程,避免了细粒级矿对浮选作业的干扰,得到了比较理想的技术指标.     

提高某低品位磷矿擦洗作业产率的研究

为进一步提高低品位磷矿的利用率,云南某磷矿对低品位磷矿进行了擦洗脱泥。通过精矿脱水工艺流程改造,旋流器底流精矿进入脱水筛后,筛下液再进入过滤机过滤脱水。结果表明,低品位矿产率由83.02%提高到93.48%,提高了低品位磷矿资源回收利用的效率。     

某低品位铜镍矿选矿试验研究

某低品位硫化铜镍矿含镍0.63%、含铜0.62%,脉石矿物主要以橄榄石、蛇纹石、绿泥石、辉石等含镁矿物为主。根据矿石性质,对其进行了浮选试验研究,采用现场生产工艺流程,通过试验调整、优化工艺参数后得到了镍品位6.11%、回收率72.30%和铜品位7.06%,回收率78.61%的合格精矿,提高了资源利用率,为矿山可持续发展提供了合理的途径。     

内蒙某低品位石墨矿选矿工艺研究

内蒙某低品位石墨矿,鳞片微细,为提高石墨精矿的品位并保护石墨鳞片,在采用浮选原则流程的条件下,对原矿粗磨的取舍、再磨段数、精选次数、再磨细度等工艺条件及参数进行了系统的试验分析,结果表明,品位为6.31%的原矿经一段磨矿至-100目占79.17%,采用一粗一扫、两段再磨、五次精选选别后,可获得C固品位为86.55%、回收率为94.20%的石墨精矿。     

Innovations in beneficiation technology for low grade phosphate rocks

As high grade deposits of phosphate rock are being depleted day by day in the world, future sources will be derived from low grade rocks containing various impurities. Low grade phosphate rocks are not suitable for direct use in acidulation plants unless their tricalcium phosphate (TCP) content is increased to 70% or more, using conventional methods such as crushing, screening, and drying, or some other physical separation process which include washing and desliming. Other special beneficiation techniques may also be applied, such as calcination, flotation and leaching before taking it as feed for the phosphatic industry.Most of the phosphate rocks are of sedimentary origin with low grade phosphate elements and higher levels of impurities. The first challenge to phosphate industry is the reduction of impurities in rock so that it is suitable for the production of phosphatic fertilizers to meet the increasing demand for phosphate and to cover the depletion of more amenable reserves in the world. This article addresses itself to this challenge: it considers the beneficiation methods for low grade phosphate rocks.     

低品位硼矿的富集加工技术

报道了青海大柴旦地区低品位硼矿富集加工的新工艺，该工艺使硼矿品位30％－35％，B2O3收率大于80％，该工艺路线已工业化。     

某中低品位磷矿选矿工艺研究

对某中低品位磷矿进行了选矿试验,结果表明:在原矿P2 O5品位为23.14%,MgO质量分数为3.72%,磨矿细度为-200目76.55%的条件下,经过先选碳酸盐后选硅酸盐的双反浮选流程,可以获得P2 O5品位为30.60%,MgO质量分数为0.68%的优质磷精矿,且精矿P2Os的回收率达81.05%.     

A new route for the beneficiation of low grade calcareous phosphate rocks

The bulk of the world's phosphate reserves is located in sedimentary horizons that contain appreciable amounts of carbonate. During beneficiation of phosphate rocks, huge amounts of oversize phosphate rocks are rejected from crushers. This reject also mostly contains low tricalcium phosphate content and high carbonate content. In this work, various experiments have been carried out to reduce the carbonate content by leaching the ground phosphate rock with dilute formic acid solution in order to get marketable and industrially acceptable phosphate grades. By using this technique, the effect of formic acid concentration, reaction time, process temperature and liquid/solid ratio (vol./wt. basis) have been studied. It was found that upon treatment of the ground rock with formic acid, the P₂O₅ percent can be raised by up to 29% corresponding to a reduction of about 69% in the calcium carbonate content of the samples, depending on the reaction conditions as well as nature and size of the raw phosphate particles used for analysis.     

利用低位热能降低选矿能耗

简单介绍我国中低品位胶磷矿选矿的5种工艺,其中单一正浮选与正-反浮选工艺过程中,矿浆均需加热升温至45℃。原利用蒸汽为热源,现节能技改,回收硫酸干吸工段低位热能预加热冷水至20(冬季)～30℃(夏季),供80万t/a选矿厂使用,从而节约蒸汽10 t/h,年节约蒸汽费用792万元。