Prior to the processing of gold in the economy of scale necessary step preproduction through in-depth study of various aspects. One study that needs to be done is to test the mineral content of rock ore to be processed.
The process of analyzing in detail the content of metallic minerals from rock samples taken from the soil in a land that has been in the survey will be a very important mineral content of the metal held in which the function of the activity analysis is to support the production activities in large-scale gold processing.
One form of assessment activities is the analysis of rock samples to see in detail the content of metals contained in the land which will be held in the processing of economic activity.
Where rock samples can be tested on a laboratory analysis. And today has many methods of analysis used in viewing the content of metallic minerals contained in rocks, but it all depends on the required results in testing, as well as methods of analysis using polarized light techniques and electron microscopy which is the best analysis in identifying minerals with very modern equipment.
This method obtained from an analysis of its structure, texture and Mineralogy in specific minerals from rock samples. To get a detailed analysis of the mineral content of rocks need to use the latest analytical techniques such as Fire Assay, Atomic Absorption Spectrometry (AAS), Induced Coupled Plasma (IC), and mass spectrometry. In addition to modern methods of analysis can also be used a simple method by using a chemical solution to see the presence of metallic mineral deposits of gold from rock samples that were analyzed.
This method is very simple and easy to do and very simple, yet has enough sensitivity to accuracy in view of the metal content of gold in rock samples of minerals.The Fire-Assay analysis is the method of choice for the analysis of precious metals traces in ores. All gold bearing alloys or grains and Sterling Silver alloys are assayed by Fire-Assay techniques
The process of analyzing in detail the content of metallic minerals from rock samples taken from the soil in a land that has been in the survey will be a very important mineral content of the metal held in which the function of the activity analysis is to support the production activities in large-scale gold processing.
One form of assessment activities is the analysis of rock samples to see in detail the content of metals contained in the land which will be held in the processing of economic activity.
Where rock samples can be tested on a laboratory analysis. And today has many methods of analysis used in viewing the content of metallic minerals contained in rocks, but it all depends on the required results in testing, as well as methods of analysis using polarized light techniques and electron microscopy which is the best analysis in identifying minerals with very modern equipment.
This method obtained from an analysis of its structure, texture and Mineralogy in specific minerals from rock samples. To get a detailed analysis of the mineral content of rocks need to use the latest analytical techniques such as Fire Assay, Atomic Absorption Spectrometry (AAS), Induced Coupled Plasma (IC), and mass spectrometry. In addition to modern methods of analysis can also be used a simple method by using a chemical solution to see the presence of metallic mineral deposits of gold from rock samples that were analyzed.
This method is very simple and easy to do and very simple, yet has enough sensitivity to accuracy in view of the metal content of gold in rock samples of minerals.The Fire-Assay analysis is the method of choice for the analysis of precious metals traces in ores. All gold bearing alloys or grains and Sterling Silver alloys are assayed by Fire-Assay techniques
Some of the steps used in the test stages of mineral content of rocks that will be done in a simple way is as follows
- Examples of rocks that have been taken from land that had been surveyed from the sample pit of approximately 60 grams of mashed up to approximately 200 mesh, and 30 grams of mineral concentrates from the rock samples.
- Prepare the water distilled water in a flask erlenmeyer. Or glass phirex large.
- Using a measuring cup, make a chemical solution of Aqua Regia is a mixture of 3 parts HCL (muriatic acid or 4 parts) plus 1 part HNO3, as much as 4 to 5 times the volume of rock specimens.
- Pour slowly into the glass Aqua Regia phirex containing distilled water. The composition of the distilled water with Aqua Regia is 1 : 1, so that the smell that caused no sting but a solution of aqua regia is sulfficent to react
- Aqua Regia and then heat with temperatures between 85 degrees Celsius to 90 degrees Celsius over the coals of fire or stove Enter a little rock that had been mashed into the glass phirex that have been content with a solution of Aqua Regia while observing the reaction and allow at least 30minutes.
It will be in getting the gold dissolution reaction of aqua regia
Au + 3HNO3 4HCl = HAuCl4 + + 3NO2 + 3H2O.
Au + 3HNO3 4HCl = HAuCl4 + + 3NO2 + 3H2O.
- After the reaction is finished wait until a cold solution of aqua regia and water settles. And then filtered using a tea strainer on top of filter have been added with a cloth napkin. So that will separate between the precipitate and the solution of aqua regia.
 |
- To test the presence or absence of the gold content in rock samples Premixed then drops on a tissue of the filter or it can also result in drops to the solution of the filtering. And for a premixed solution can be made by using 5% stannous Chloride / Tin Chloride (SnCl2) is dissolved with 95% HCL) stannous chloride(SnCl2) is a reagent for testing the presence of gold metal content is very sensitive, and capable of detecting up to 10 ppb.
- In the sediment screening results, if there are purple results from Premixed droplets (called Purple of Cassius), the metallic minerals in the identification of the element metals contain gold ore minerals
/*