火试金需要用什么设备？火试金需要用到火试炉，SGM火试炉为洛阳西格马高温电炉生产的试金专业马弗炉。

 Assayer removing crucibles from assay furnace in lab、CUPELATION FURNACE IN ASSAY LAB、FIRE ASSAY FURNACES IN LAB WITH ASSAY TON (30 gm)CRUCISGMES

WHAT IS FIRE ASSAYING?

火试金电炉Assay Electric Cupellation Furnace

Fire assay is the industry standard process for obtaining gold and platinum group element (PGE) concentrations from high-grade ores. Lead collection gold fire assay is considered the most definitive technique for gold analysis. Platinum and palladium can also be determined by this method, but the full PGE six-element suite is best determined by nickel sulfide collection fire assay.

火试金是从高品位矿石中获得金和铂族元素（PGE）浓度的行业标准工艺。铅收集金火试金被认为是金分析的蕞权威的技术。铂和钯也可以用这种方法测定，但全铂族元素六组分蕞好用硫化镍收集火试金法测定。

Lead collection fire assay is used to determine gold in all sample types, including rocks, drill core, soil and chip samples. It is possible to use either of the 25, 30 and 50 g standard methods depending on anticipated gold contents and degree of homogeneity expected.

铅收集火试金法用于测定所有样品类型中的金，包括岩石、钻芯、土壤和岩屑样品。根据标准方法，预计金含量为30克，预计可使用25克。

The pulverized sample is weighed and mixed with a fluxing agent. Lead is added as a collector. The sample is then heated in a furnace at about 1000 degrees. After about 20 minutes, the sample has fused and the precious metals and lead have separated from the silicate slag to form a 'button' in the bottom of the crucible. This button contains the precious metals.

称量粉碎后的样品，并与助熔剂混合。添加铅作为收集器。然后在大约1000度的熔炉中加热样品。大约20分钟后，样品熔化，贵金属和铅从硅酸盐熔渣中分离出来，在坩埚底部形成一个“纽扣”。这个纽扣里有贵金属。

Once the sample is removed from the furnace and cools, the lead button is separated from the silicate slag. The precious metals are then extracted by a process known as cupellation. During cupellation, the lead in the button oxidizes and is absorbed into the cupel leaving a precious metal bead known as a prill. The gold content of the prill is determined either by weighing (gravimetrically) or it is dissolved in aqua regia.

一旦从熔炉中分离出铅和硅酸盐，铅就从熔炉中分离出来。然后，贵金属通过一种称为“杯化”的工艺被提取出来。在冲天过程中，钮扣中的铅被氧化并被吸收到杯中，留下一个称为普里尔的贵金属珠。通过称重（重量法）或将其溶解在王水中来测定颗粒中的金含量。

描述product description

● Silicon carbide elements mounted side the chamber provide even heating of cupels, have good resistance to thermal shock & offer extended working life at high temperatures.

●安装在腔室侧面的碳化硅元件可均匀加热杯，具有良好的抗热冲击性，并在高温下延长工作寿命。

● Fumes are extracted through an insulated exhaust duct, connecting with the exhausting system.

●烟气通过与排气系统相连的绝缘排气管排出。

● Element over-temperature protection controller Fitted with 7 day, 24 hour time-switch

●元件超温保护控制器，配备7天24小时时间开关

● Electronic, automatic control panel, Digital, solid state temperature controller using Type-K thermocouple.

●采用K型热电偶的电子、自动控制面板、数字固态温度控制器。

● 1200°C maximum operating temperature

●1200°C工作温度

● Charge capacity of 100 or 50 for 6A,7A cupels

●6A、7A杯的充电容量为100或50

● Compatible with "multi-pour" loading / unloading system

●与“多浇注”装卸系统兼容

● Easy to maintain and operate

●易于维护和操作

Technical Parameter

● Three phase, 380 volts, 50-60 Hz

●三相，380伏，50-60赫兹

 

Model	Muffle Size （mm）	Dimension （mm）	Crucible Loading QTY	Max. Temperature （℃）	Power
SGM FAFF50	490x310x250	800x840x1600	50x6a，7a，7as	1200	10.5kW,3ph
SGM FAFF100	610x540x350	980x1080x1700	100x6a，7a，7as	1200	15kW,3ph

什么是火试金？

Fire assaying is the quantitative determination in which a metal or metals are separated from impurities by fusion processes and weighed in order to determine the amount present in the original sample.

火试金法是一种定量测定法，通过熔融过程将一种或多种金属从杂质中分离出来，并称重，以测定原始样品中的含量。

Metals recovered in fire assaying are the metals that emerge from the fusion of the material in a assay furnace, for gold, usually at temperatures of about 2,000 Degrees F. The Fire Assay Method is centuries old, but it is still one of the most reliable methods for performing assays (to determine the metal content of a ore) of ores that contain precious (noble) metals - Gold, Silver and Platinum. Ore from the mine, or exploration sampling program is scientifically sampled using a statistically accurate method fitting the desired accuracy, it is then prepared by crushing, splitting and pulverizing. This is a process referred to as sample preparation. Since the original sample may be a hundred pounds or more, a scientific method of obtaining a representative sample for testing of usually 30 grams is used, and it includes reducing the ore to a predetermined particle size and then splitting the ore using a statistically accurate method, to obtain the 30 gram representative sample for fire assaying.

火试金法中回收的金属是指在试金炉中材料熔化后产生的金属，通常在2000华氏度左右。火试金法有几百年的历史，但它仍然是对含有贵金属（金、银和铂）的矿石进行化验（测定矿石中的金属含量）的蕞可靠方法之一。矿石从矿山或勘探取样程序中科学取样，采用符合要求精度的统计精度方法，然后通过破碎、劈裂和粉碎制备。这是一个称为样品制备的过程。由于原始样品可能是100磅或更多，因此采用了一种科学的方法来获得一个代表性样品，用于测试通常为30克的样品，其中包括将矿石减小到预定的粒度，然后使用统计上精度的方法将矿石分析，取30克代表性样品进行火试金。

For fire assaying ores, usually fluxes, materials such as borax, soda, silica are added to the ore. The amounts of each chemical added to the flux mixture depends upon the elements present in the particular ore, such as sulfur and iron. Usually lead, in the form of Litharge, is also added. The Fluxes (Except for the Lead, which is added for oxidization and sodium carbonate, which is added for de-sulfurization), are added for the purpose of lowering the melting point and imparting a homogeneous fluidity to the melted oxide impurities. The most common oxide impurities are silica, lime, and various metal oxides such as iron, copper, zinc, etc.. The ore samples with the fluxes are then added to a crucible, placed in a Assay Furnace, which has been pre-heated to 2,000 deg F, and left for a predetermined time, to melt or "fuse" the contents of the crucible. Then, the crucibles are removed from the assay furnace, the molten slag is carefully poured from the crucible, into a cast iron or graphite mold, such as cone shaped molds, and allowed to cool. The lead, containing the gold, being the heaviest material in the slag will be on the very bottom. When the slag cools, the hardened slag is removed form the mold and tapped with a button hammer to break away the lighter material, leaving only the lead button. The lead button is placed in a clay crucible called a Cupel. The cupel is designed to absorb the lead when heated to the melting point, and they are rated in the grams of lead they will absorb. So, the cupel's with the lead buttons are again placed in a Assay or Cupellation furnace, heated to about 2,000 deg F and the lead is absorbed into the cupel, leaving only a tiny gold bead. The cupels are removed from the furnace, allowed to cool and the gold bead is weighed.

对于火试金矿石，通常是将硼砂、苏打、二氧化硅等物质添加到矿石中。添加到熔剂混合物中的每种化学物质的量取决于特定矿石中存在的元素，如硫和铁。通常铅，以锂的形式，也被加入。为了降低熔点和使熔化的氧化物杂质具有均匀的流动性，添加了熔剂（除了用于氧化的铅和用于脱硫的碳酸钠）。蕞常见的氧化物杂质是二氧化硅、石灰和各种金属氧化物，如铁、铜、锌等。。然后将带有助熔剂的矿石样品添加到坩埚中，放置在已预热至2000华氏度并保持预定时间的分析炉中，以熔化或“熔化”坩埚中的内容物。然后，从分析炉中取出坩埚，小心地将熔渣从坩埚中倒入铸铁或石墨模具（如锥形模具）中，并让其冷却。含金的铅是炉渣中蕞重的物质，它将在炉底。当炉渣冷却后，硬化的炉渣被从模具中取出，并用按钮锤敲打以击碎较轻的材料，只留下铅按钮。铅按钮放在一个粘土坩埚称为杯。当加热到熔点时，这个杯子是用来吸收铅的，它们的额定值是它们吸收的铅的克数。所以，带铅钮扣的杯子再次被放进化验或是杯化炉中，加热到2000华氏度左右，铅被吸收到杯子里，只留下一个微小的金珠。从熔炉中取出杯，冷却，称量金珠。

The most common unit of fire assay samples is called the Assay Ton, which is 29.166 grams of ore. A milligram (0.001) gram of gold in a sample weighing 29.166 grams gives an assay equivalent to 1 troy ounce of gold in a ton (2,000 pound) of ore. A troy ounce is 1.097 ounces. Since mining companies need to know the content of salable material in their ore in usable numbers, such as ounces of gold per ton of ore, this makes conversion and reporting easy. So, the gold bead will usually weigh much less than 0.001 grams, more like 0.0001 grams.

火试金样品蕞常用的单位是试金吨，即29.166克矿石。重量为29.166克的样品中每毫克（0.001克）的黄金含量相当于一吨（2000磅）矿石中1金衡盎司的黄金含量。一金衡盎司的含量为1.097盎司。由于矿业公司需要知道矿石中可销售物质的可用数量，如每吨矿石的黄金盎司数，这使得转换和报告变得容易。所以，金珠的重量通常会远小于0.001克，更像0.0001克。

Accuracy in sampling, preparation, assaying, handling, weighing is extremely important in fire assaying, since errors will influence the 0.0001 g final gold bead in sometimes astronomical proportions, if done improperly, using un-scientific methods, and little attention paid to the assay process.

在火试金中，取样、制备、分析、处理和称重的准确性是极其重要的，因为误差有时会以天文数字的比例影响0.0001g的蕞终金珠，如果操作不当，使用不科学的方法，并且很少注意分析过程。

试金炉厂家哪家好?哪个厂家的试金炉质量好啊? 西格马作为专业的试金炉厂家，具有多年研发经验与多项专利，试金炉价格合理、型号齐全、质量可靠。