How Process Smelting Gold

Smelting gold, silver, platinum and other metals at home is a popular trend these days, whereas it used to be of interest only to jewelry designers and artists.

Gold is purified by means of a smelting process, which utilizes pressure, high heat and chemicals to accomplish the task. Like any metal that appears naturally in the earth, there are impurities that must be removed. Removing minerals and other impurities allows gold to be used in its purest form

Have you recently scored some gold dust or small nuggets on a recent creek panning adventure?

Whether you are smelting natural gold you've recovered from prospecting, or the broken jewelry or beat up coins you no longer want, smelted gold is most easily sold or re-fashioned after first removing impurities and casting it into ingots.

Interested in The processes of smelting or roasting your ore to recover its gold and silver? Some fairly rich ores require a lot of work to get all the gold and silver out them.

How To Use The Gold Consentrate Smelting Furnace

Smelting is a form of extractive metallurgy whose function is primarily to produce a metal from ore company. Where this smelting process uses heat and Chemical reducing agent to change the state of oxidation of the ore in the furnace furnace. Furnace equipment has a role as a source of heat transfer the heat generated from fuel combustion reaction by Burner in the fire box, whether it be a Fuel Gas, Fuel Oil or other types of fuel with air, whereby heat generated was transferred into the crude oil flowing in the tube. In the process of smelting ore concentrate in the form of fine sand that has a metal content of gold, silver, copper and minerals that contain other elements, then there are three stages of the smelting process used.

The first process Smelting Furnace:Ore concentrate that has been generated from a given mining with SiO2 flux. The results of this concentrate is introduced into the furnace heat furnace with high temperatures between 1200 degrees Celsius and air flow are given, and usually free air compressor with 60% oxygen regulated. The purpose of this air is to oxidize the main impurity element in the form of Fe. From oxidation to FeO and Fe3O4 and starts cutting sulfur in the concentrate into SO2. The results from the smelting furnace and into the slag Cleaning

Slag Cleaning here are still a molten Cu Matte sulfur content because they are still a lot to be separated with the slag formed from the first process. In this process will use electric arc furnace. so the heavier matte and slag will be below the float, still heated. Here is a separate metal slag. To eliminate the sulfur content will be through the process of converting furnace

Converting Furnace In this process air is blown matte longer wear and additional ces flux limestone (CaCO3), because its main purpose is to oxidize sulfur, and using lime to keep the composition of the slag so as not to thick, very solid because of Fe3O4 can not be blown up with air.. After going through the process of converting the sulfur has begun to slow (0.8%) and are called blister copper is not a matte. Then proceed into the Furnace to print a Cu anode blister because it requires electrowinning for subsequent process steps.

These few examples of simple equipment for metal smelting : 

READ MORE >>

• Furnace Metals Melting Portable  
• Small And Portable Gold Smelting Cupelling Kit 
• Furnace Set Melting Oven Kit Set for Melting Gold Silver Copper Precious Metals

System Flow Chart In a Simple Heap Leaching

In general, processing system gold using heap leaching method can be described as the chart below

Transport of rock minerals on lands open pit using dump trucks

Rock mineral that is ready to be destroyed and soften

GOLD Content In Precipitates Aqua Regia.

In decision precipitates in aqua regia solution that has been contained gold metal content is required several stages.And eventually precipitated from these precipitates can be dissolved to be made in a metallic gold.

Some stages are used in the decision are as follows :

• To neutralize the residual HNO, add urea [CO (NH2) 2] to the Aqua Regia which has been filtered.

it will get a reaction :

6 HNO₃ + 5CO(NH₂ ) ₂ = 8N₂ + 5CO₂ + 13H₂O   

The trick Urea enter little by little until the reaction finished white bubbles. From this reaction would make nitric acid to neutral pH conditions and changed from 0.1 to pH 1.0. 

• After the reaction is complete then Enter Sodium Bisulphite and observe the reaction.In theory, every single gram of gold requires 1.89 grams of Sodium Bisulphite. However, it should be added more, about 1.5 times longer.

Then the reaction is :

2HAuCl 4 + 2NaHSO3 = 2Au + 4HCl + Na2 SO4 + SO2

• Wait about 30 minutes, until no precipitate (sludge) that appear brownish-black color. And then dispose of the liquid solution slowly to the remaining precipitate only way destilled filtered and then rinsed with water. Sodium Bisulfide If not then there are several alternative reagents that can be used as a substitute such as Sodium Sodium Bisulphite Metabisulfide (SMB), oxalic acid, sulfur, and Sulphur Dioxide or Copperas (Ferrous Sulphate)

• Then pour it gently - the land of ammonia solution (30 ml Aqua ammonia has been dissolved into 100 ml mineral water) to precipitate until the pH reached 8.It will get a Gold Fulminating sediment.Remember fulminant sediment is very dangerous, not to dry because it has the nature of the High Explosive.  

• Wash the precipitate to remove excess ammonia. Wash several times until the pH reaches close to 7

• Then rinse the sediment precipitates made ​​in one and then in the process of melting metal to form gold.  
• Related Articles PROCESS SMELTING GOLD 

READ MORE >>> Gold Precipitation Methods

Melting Process Of Gold Ore

Consolidation is a method for obtaining metals from ores or metals. This usually involves the reduction of metal oxides (ore) to metal (reduction reaction are those which take electrons away from the elements, the reduction becomes the opposite of oxidation reactions), and the formation of non-metal oxide waste known as slag. It is a chemical process and involves more than just melting the gold. In the process of smelting gold metallic mineral ore concentrates the results of gold, the melting process is a fire burning at a temperature of 1800 ° C, causing an oxidation of minerals and melt and form a solid system - liquid. And in the process of smelting, the ore minerals may be added by Chemical Fusing Metallic Minerals such as

borax, backing soda, or with ammonium chloride (NH4Cl) to mineral-borne heavy metals along with gold ore minerals can be separated.

At the initial stage of fusion is to place the mineral ore concentrate which was completed in the extraction into a container shaped like a fusion of glass or a large bowl made ​​of carbon materials. Then the container was put into a melting furnace, because the fireplace can help keep a certain chemical conditions and hot temperatures in order to stabilize the mineral ore into a metal melt easily. Metallic mineral ores need to be heated to very high temperatures to produce pure metals as well as temperatures higher temperatures. Iron melts at 1800 ° C (3270 ° F) and gold melts at 1062 ° C (1943 ° F). Because iron has a higher melting temperature than gold. After the melting process was finished and the metal has completely melted as liquid water is clear and shiny metal can then immediately pour into a mold to form an ingot that would be cool if it has a gold metal bars.

 These few examples of simple equipment for metal smelting : 

READ MORE >>>

• Furnace Metals Melting Portable  
• Small And Portable Gold Smelting Cupelling Kit 
• Furnace Set Melting Oven Kit Set for Melting Gold Silver Copper Precious Metals