锦候
发表于 2011-9-14 11:58:26
纯度是4个9,或者5个9肯定是忽悠,以前在国内的时候听从事这方面工作的人说过,现在的技术不可能加工到那个纯度。工厂的环境绝对不可能,加工过程中就会有氧化了,就算是在真空条件下加工好了,出来放在空气中也会马上开始氧化,不可能达到99.99的纯度。常说的什么24k也就是99.6吧,还是96%什么的忘了。
这个99.99%什么可能就是个习惯叫法,就像那个100%天然纯果汁一样,其实所有的果汁都只含30%左右的果汁,其他的就是添加剂了。不然没法保持不变质。
Highway
发表于 2011-9-14 12:16:38
锦候 发表于 2011-9-14 11:58 static/image/common/back.gif
纯度是4个9,或者5个9肯定是忽悠,以前在国内的时候听从事这方面工作的人说过,现在的技术不可能加工到那个 ...
我觉得不是。国外这方面要求还是很严的。如果不符实,别人可以起诉你的。并且这都是“国币”,成分和含量都是公开的。有了问题,你可以起诉该国政府。
你看铂金金币,就标着9995,而不是9999,所以那几个字不是写着玩的,是有原因的。全世界到目前也就是加拿大一家出99999纯度的黄金,别家还真没有。
中国的国币熊猫币到现在也就是99.9%,也许我们技术上还有些问题。但是按照纯度的算法,24K金就是99.9% or higher。所以中国的熊猫币还是正儿八经的24K金币的。用香港那面的术语来说,中国的熊猫币是千足金币,美国buffalo,加拿大maple和澳大利亚袋鼠币是万足金币。
李禾平
发表于 2011-9-14 12:26:45
本帖最后由 李禾平 于 2011-9-14 04:34 编辑
Highway 发表于 2011-9-10 15:37 static/image/common/back.gif
回复 夜观天象 的帖子
要看就看这个-2012年龙年生肖币,现在已经开始可以订购了。最大的10公斤。价格吗, ...
这个看着不错!
不知道最小的有多大,想弄一个来玩玩。
----------------
找到了他们的网站,但是看不清楚具体有多大。
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咦,怎么是澳大利亚的?
李禾平
发表于 2011-9-14 12:56:48
本帖最后由 李禾平 于 2011-9-14 04:57 编辑
Highway最小的是1/20盎司。不过我建议不要买。我曾买过1/4的,感觉太轻薄了,就转手又买了。
这样啊,我也是看中1/4盎司的。
找到一个英国网站卖,比美国网站还便宜一些。
锦候
发表于 2011-9-14 13:53:22
本帖最后由 锦候 于 2011-9-14 14:04 编辑
Highway 发表于 2011-9-14 12:16 static/image/common/back.gif
我觉得不是。国外这方面要求还是很严的。如果不符实,别人可以起诉你的。并且这都是“国币”,成分和含量 ...
不是我故意败你的兴致,不过我了解的情况真的不是这样的。
这些是约定成俗的说法,就像2 by 4不是真的2英寸乘4英寸一样。你买2by4的时候量过没有?
有没有人说2by4不够尺寸告商店的?
跟我说金币的人具体什么身份忘了,但是肯定是搞了一辈子金子的高级技术人员,忘了是银行的,还是国营金店的,那时候国内个人是不能买卖黄金的,10几年前吧。那个果汁地说法是当时健力宝果汁公司的总经理叫李什么告诉我们的,他是那个李经纬的死党,自称要是将来写中国的饮料史肯定会有他的名字,不过我是忘了他的名字了。健力宝集团下属最有名的企业是运动饮料,这个果汁一直没打出名堂,是专门作果汁饮料的。
虽然我都是听别人说的,但是这些人都是很专业的人员,应该不会乱说,而且他们说的场合也不会乱说,黄金是当时在一个商场工作,那个人是特别请来给我们培训相关知识的。那个果汁呢,是后来有朋友搞健力宝的代理,把我叫过去了。那个李什么过来谈合作条件并且介绍公司的情况,不过后来因为有别人给了更好的条件,健力宝就把我朋友给甩了。所以他们说的应该还是有谱的。
再说了不要说普通人就是差一点的研究机构都没有相关的设施和能力检测到99.99的纯度,不论是什么金属。
Highway
发表于 2011-9-15 00:44:36
本帖最后由 Highway 于 2011-9-15 00:47 编辑
锦候 发表于 2011-9-14 13:53 static/image/common/back.gif
不是我故意败你的兴致,不过我了解的情况真的不是这样的。
这些是约定成俗的说法,就像2 by 4不是真的2英 ...
你那位朋友的知识曾经是对的,但是需要更新了。
工业界大概在40年前就可以生产9999纯度的黄金了,美国业界大概是1982年成熟的,加拿大看来要早几年。除了中国,世界上主要的金币生产国都是9999纯度的黄金了(南非的格鲁巴和美国的鹰币例外,是22K金)。
这里有篇文章,你可以看看。如果有兴趣的话,不妨转给那位朋友,让他也更新一下知识。
Refining Gold Explained!
The process of refining gold is necessary to obtain gold of the greatest possible purity from a myriad of sources.These may include industrial scrap, recycling banks, primary producers of precious metals, dealers, financial institutions, and mints. The mechanical preparation and concentration of ore is termed ore dressing; it produces gold that is often an admixture with trace impurities and some silver. Further treatment is necessary to remove the contaminants in freeing and refining gold.
Refining gold may be done by any of several methods, all quite technologically advanced. Huge amounts of refined gold are produced by some of the biggest refineries in the United States: the capacity to produce more than 10 million troy ounces each year is not unusual.During the past 40 years or so, the standard methods of refining gold were able to produce gold that was .9999 fine.In 1982, bullion coins of .9999 purity were produced by the best American refineries.Today one can buy the first American solid gold 24K bullion coin, the American Buffalo $50 coin. On the obverse (heads) side is shown the profile of a Native American chief, and on the reverse (tails) side, a picture of the buffalo. The weight, content, and purity of this .9999 fine coin are guaranteed by the US government.The coin sells for $918.77!The most highly-developed technological processes of the present day for refining gold yield a gold that is .99999 pure, to be used for granulation – a technique of jewelry embellishment that solders tiny spherical droplets of gold onto a base.
These are the two stages of the process of refining gold:
• The feed material of gold ore is treated with the Miller chlorination process, a pyrometallurgical operation in which the gold is heated in crucibles until melted, then exposed to chlorine gas. Although chlorine does not react with gold, it does combine with silver and other impurities in the ore to form chlorides. These float to the surface and can be skimmed off to leave behind gold that is .995 pure and therefore meets the requirements of the London bullion market.
• Some end-use customers require gold that is even more pure. The .995 pure gold is cast into anodes. These are placed in an electrolyte solution, along with cathodes of pure gold. When an electric current passes from anode to cathode through the electrolyte solution, the anodes dissolve, and the pure gold in them passes to the cathodes. It is a long process of refining gold, requiring about two days, but it does produce gold that is .99999 pure. At the end of the operation, the gold-coated cathodes are removed, molten, and cast into bars.
Another process for refining gold treats it with sulphuric, nitric, and hydrochloric acids. These do not react with gold, but do react with impurities. In the final stage of this process, the purified gold is molten and cast into bars weighing approximately 28 pounds.
Still another way of refining gold is the fire assay process, using the technique of cupellation.This is an old technique that was used to separate silver or gold from lead or other base metals. Essentially, an alloy of gold and other metals, including lead, is melted at a high temperature and then allowed to freeze. When it is cooled, a small amount of precious metal (gold and silver) and lead remains, and a slag is formed of base metals and other impurities. The “button” of gold and silver is again subjected to extremely high heat; the lead oxidizes and goes into the atmosphere. Finally, the small piece of gold and silver is placed in nitric acid, which dissolves the silver and leaves the 24K pure gold. This ancient method of refining gold should only be used for small quantities of gold, not more than 10 grams, because the process emits large quantities of highly toxic lead oxide fumes.
For refining gold in larger quantities, a more ecologically-sound technique can be used; for example, inquartation and parting.This involves melting the gold to be refined in an alloy with silver or copper, such that the gold makes up about 25 percent of the alloy. The base metal is then dissolved in acid, preferably nitric acid, which removes all but the gold.The resulting gold sludge may be treated with a secondary bath of hydrochloric acid, and is then washed and drained. Inquartation and parting has been found to be useful in treating gold scrap of 10K to 14K; the necessary additions of silver or copper may already be present in the scrap material.It should be noted that these last three processes for refining gold must only be performed in an appropriately specialized industrial environment.
On a very much smaller scale, refining gold at home is even possible. Chemical kits requiring a minimum of equipment are available; usually you only need a battery charger with DC current and a few Pyrex glass vessels. Such kits purport to be completely safe, and are sold as science experiments for older children. Look on the Internet to find more details about suppliers.
国外铸币,尤其是那种有Face Value的国币都是按照法律条纹来生产的。譬如美国的鹰币就是国会通过了Gold Bullion Coin Act of 1985以后才依法铸造的,美国政府要保证它的品质的。加拿大的枫叶币是根据Canadian Currency Act and the Royal Canadian Mint Act两项法令来铸造的。这和和小贩产果汁是两码事儿。
锦候
发表于 2011-9-15 00:51:29
Highway 发表于 2011-9-15 00:44 static/image/common/back.gif
你那位朋友的知识曾经是对的,但是需要更新了。
工业界大概在40年前就可以生产9999纯度的黄金了,美国业 ...
看了,看来真的是落后了!学习中!
dragonnj
发表于 2012-8-29 16:56:56
不知道啥价格,要不也整个2两尝尝鲜{:221:}
请我吃饭
发表于 2012-8-29 20:27:19
问一下, 第二张上的金币为啥有红点?我有一块5g的迷你金条, 也有一个小红点。
Highway
发表于 2012-8-29 22:52:49
请我吃饭 发表于 2012-8-29 20:27 static/image/common/back.gif
问一下, 第二张上的金币为啥有红点?我有一块5g的迷你金条, 也有一个小红点。 ...
他们管这些“红点”叫 Copper spot。其原因吗,应该是金币里的微量杂质引起的,比如说常见的铜。
这些点子可以被除去的,但是不建议个人去搞,因为弄不好会对金币有损害的。
Highway
发表于 2012-8-29 22:55:31
dragonnj 发表于 2012-8-29 16:56 static/image/common/back.gif
不知道啥价格,要不也整个2两尝尝鲜
一般的金币就是市场金价加50-100刀左右,很简单的。
老币,稀币,有收藏价值的另算,没有什么程式,和集邮差不多一个道理。
dfandfan
发表于 2012-9-15 19:45:58
Highway 发表于 2011-9-10 23:37 static/image/common/back.gif
回复 夜观天象 的帖子
要看就看这个-2012年龙年生肖币,现在已经开始可以订购了。最大的10公斤。价格吗, ...
……我去,这能砸死人
rhett
发表于 2012-9-17 22:36:30
中国现在好像也有5九金了
dfandfan
发表于 2013-1-16 16:02:37
今年托人从大家拿搞了个1/10盎司的枫叶币,很漂亮。大可惜就是币面还是小了。争取明年搞个大点的。
禅人
发表于 2013-4-24 00:21:13
本帖最后由 禅人 于 2013-4-24 00:25 编辑
Highway金币上的面值就是个“摆设”,1盎司的枫叶币面值也就50加刀,现在卖1850美刀,30倍都不止了。中国熊猫币一开始面值100元,现在1万都买不到。。。发表于 2011-8-17 21:32师太给我看了一枚枫叶币,向银行买的,立马想起到轧叔的帖子里来比对,与你贴的照片应该是一样的,一盎司9999金,只不过是2013年出品,现价与你的数字差不多,不过是已经降为坡币了,折合美元大约1500 ;P
李根
发表于 2013-4-24 00:39:33
现在适合入手不?
{:200:}{:200:}{:200:}
Highway
发表于 2013-4-24 00:52:14
李根 发表于 2013-4-24 00:39 static/image/common/back.gif
现在适合入手不?
要是指望这个发财就复杂了。要是想买几个玩玩,那现在还是个不错的时机,
李根
发表于 2013-4-24 00:54:24
Highway 发表于 2013-4-23 11:52 static/image/common/back.gif
要是指望这个发财就复杂了。要是想买几个玩玩,那现在还是个不错的时机, ...
就是玩,指着这个发财得活很久才行啊
{:187:}{:187:}{:187:}
石头布
发表于 2013-4-24 04:04:57
我的部分存货。
黄金抗氧化性还是远好过白银,包装也较为简单。
Highway
发表于 2013-4-24 05:04:11
石头布 发表于 2013-4-24 04:04 static/image/common/back.gif
我的部分存货。
澳大利亚的金币有个小塑料盒,别家的包装都很简单。
24K金比较软,所以要是收藏的话,上网买那种透明塑料盒(coin capsules),效果很好。就是买的时候要看仔细了,因为各家金币的大小不一样。。。