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渣漿泵砂金礦 床的類型及特點(diǎn)是什么?
砂金礦床是由砂、礫石和其他有用礦物與金及殘積物組成的，這種礦床由含金的巖石經(jīng)風(fēng)化和機(jī)械富集作用而形成。砂金礦床的類型:
①按其搬運(yùn)距離的遠(yuǎn)近分為殘積砂金礦、坡積砂金礦，洪積砂金礦、沖積砂金礦、濱海(湖)岸砂金礦。
②按其搬運(yùn)力的性質(zhì)分為風(fēng)成砂金礦、冰成砂金礦、水成砂金礦。
③按其產(chǎn)出的地貌部位和產(chǎn)出條件可分河床(谷)砂金礦、階地砂金礦、支谷砂金礦、巖溶充填砂金礦。
砂金礦床的寬度一般為 5-300m或更寬，長度可達(dá)數(shù)公里甚至數(shù)十公里;一般由松軟的砂石堆積而成;礦體理藏深度一般1~5m也有的20~ 30m其至更深:含金礦層厚度通常1~5m,個(gè)別可達(dá)10m;砂金的威巖或基巖多半是花崗巖、頁巖、石灰?guī)r。
15 砂金礦的選別特點(diǎn)是什么?
砂金礦的含金量很低，一 般0.2~0. 8g/m3;砂金礦原料粒度組成很寬，脈石最大粒度往往比砂金最小粒度大幾千倍，入選前需通過分級作業(yè)把不含金的巨礫和礫石分離出來，減少入選礦石的體積;精礦產(chǎn)率很低，一般0.01%~0. 1%;選礦比特別高，可達(dá)千倍甚至萬倍;重選精礦需經(jīng)過多次精選過程，才能獲得砂金和合格的重礦物精礦;對于黏性很強(qiáng)的砂金礦或永凍層產(chǎn)出的含金凍塊，必須加強(qiáng)碎散作用以提高金的回收率。
16砂金選別的主要設(shè)備有哪些?
重力選礦是砂金選別的主要方法，常用的重選設(shè)備有跳汰機(jī)、溜槽、圓筒形及圓盤形離心分選機(jī)、螺旋選礦機(jī)、圓錐選礦機(jī)、短錐旋流器、搖床等。
17鉑族礦 物的主要選礦方法有哪些?
提取鉑族金屬的主要工業(yè)礦物有鐵鉑合金、銥鉑礦、砷鉑礦及硫鉑礦，砂鉑礦等。
重選是富集鉑族金屬礦物的古老方法，也是主要的方法。由于鉑族礦物的密度較大，如自然鈀11. 84~ 11.97g/cm3，自然鉑21. 5g/cm3，自然銥22. 6g/cm3，銥鋨礦21. 6g/cm3。使用溜槽、跳汰、搖床及風(fēng)力選礦都可有效地富集鉑族金屬。砷鉑礦密度10.6g/cm3，重選試驗(yàn)回收率可達(dá)96%。自然鉑與自然金一樣表面
潤濕性小，可用黃藥類捕收劑浮選。與銅鎳硫化礦伴生的鉑族礦物一般品位低、粒度細(xì)、共生狀況復(fù)雜， 而隨主要金屬硫化物一道被富集回收。
18脈鉑礦 應(yīng)如何處理?
脈鉑礦首先通過重選-浮選聯(lián)合流程的選別，浮選精礦經(jīng)轉(zhuǎn)爐吹煉成高锍，高锍通過加壓浸出并焙燒再浸出，獲得鉑族金屬含量大于45%的精礦，鉑族金屬富集物送精煉廠精煉。渣漿泵
What are the types and characteristics of slurry pumped gold deposits?
The placer gold deposit is composed of sand, gravel and other useful minerals, gold and eluvium. The deposit is formed by weathering and mechanical enrichment of gold bearing rocks. Types of placer gold deposits:
① according to the distance of transportation, it can be divided into eluvial gold placer, Deluvial gold placer, proluvial gold placer, alluvial gold placer and Binhai (Lake) Bank gold placer.
According to the nature of its carrying capacity, it can be divided into aeolian placer gold, glacial placer gold and hydric placer gold.
③ according to the geomorphic location and occurrence conditions, it can be divided into riverbed (Valley) placer, terrace placer, Zhigu placer and karst filled placer.
The width of the placer gold deposit is generally 5-300m or more, with a length of several kilometers or even tens of kilometers; it is generally formed by the accumulation of soft sandstone; the ore body is generally 1-5m deep, and some 20-30m deep; the thickness of the gold bearing layer is usually 1-5m, and some can reach 10m; the sandstone or bedrock of the placer gold is mostly granite, shale, limestone.
What are the characteristics of gold placer separation?
The gold content of placer gold is very low, generally 0.2-0.8g/m3; the particle size composition of placer gold raw materials is very wide, and the maximum particle size of gangue is often thousands of times larger than the minimum particle size of placer gold. Before being selected, it is necessary to separate the boulders and gravels without gold through grading operation, so as to reduce the volume of the selected ore; the fine mineral rate is very low, generally 0.01% - 0.1%; the ore dressing ratio is particularly high, up to thousands or even thousands of times; the concentrate of gravity separation needs After many times of cleaning, the placer gold and qualified heavy mineral concentrate can be obtained; for the placer gold with strong viscosity or the gold bearing frozen block produced by the permafrost, the fragmentation must be strengthened to improve the recovery rate of gold.
What are the other main equipment for placer gold dressing?
Gravity separation is the main method of placer gold separation. The commonly used gravity separation equipment includes jig, chute, cylindrical and disc centrifugal separator, spiral concentrator, cone concentrator, short cone hydrocyclone, shaker, etc.
What are the main beneficiation methods of PGM?
The main industrial minerals for the extraction of PGMS are ferro platinum alloy, iridium platinum ore, arsenic platinum ore, sulfur platinum ore and placer platinum ore.
Gravity separation is an old and main method to enrich PGMs. Because of the high density of platinum group minerals, such as natural palladium 11.84-11.97g/cm3, natural platinum 21.5g/cm3, natural iridium 22.6g/cm3, iridium osmium 21.6g/cm3. The use of chutes, jigs, shakers and wind beneficiation can effectively enrich PGMs. The density of arsenopyrite is 10.6g/cm3, and the recovery of gravity separation test is 96%. Natural platinum has the same surface as natural gold
It has small wettability and can be floated with xanthate collector. Platinum group minerals associated with copper nickel sulfide ores are generally of low grade, fine particle size and complex symbiosis, and are enriched and recovered along with the main metal sulfides.
How to deal with 18 vein platinum ore?
The vein platinum ore is first separated by gravity flotation combined process. The flotation concentrate is blown into high matte by converter. The high matte is leached under pressure and then roasted and leached to obtain concentrate with platinum group metal content more than 45%. The concentrate of platinum group metal is sent to the refinery for refining. Slurry pump
