What are the ore testing standards? How to detect ores

The first step is the collection of samples, due to the uneven distribution of the composition of solid materials, so different points should be selected for collection in a certain way. In order to ensure that the samples taken are representative.

Step 2: Preparation of the specimen, (1).Crushing and filtration, using mechanical or manual methods to gradually crush the sample, generally divided into coarse crushing, medium crushing, fine crushing and other stages.

Coarse crushing with a jaw crusher to crush the sample to the point that it can pass through the No. 4 No. 6 sieve (No. 6 sieve diameter millimeters), medium crushing No. 20 sieve (, fine crushing according to different ore requirements, if necessary, use a grinding disc or mortar, the general sieve hole is 100 200.

Step 3: Mixing and shrinking, select a representative part, and use mechanical stirring or manual methods to mix the sample evenly. The appropriate part of it is then mechanically selected as the experimental sample.

Here is the method of manual indensation (quadrangle) (hehe......We do this experiment), pile the samples that have been mixed evenly into a conical shape (be careful to fall from the height, not directly into the pile), and then press them into a cake shape, and divide them into four parts from the cake**, removing the two parts diagonal. This halves. Do this in order until the amount of sample is suitable for the experiment.

Step 4: Dissolution of the sample, hehe......It depends on the main components of your ore (in principle, it is cold and then hot, dilute and then concentrate), hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, perchloric acid, hydrofluoric acid, and then mix acid (sulfuric acid-phosphoric acid, sulfuric acid-nitric acid, hydrochloric acid-hydrogen peroxide, concentrated sulfuric acid-perchloric acid), for amphoteric metals can also use alkali (potassium hydroxide, sodium hydroxide), if it is not dissolved, you can only use the melting method, semi-melting method, dry ashing method, wet digestion method, microwave-assisted digestion method. (That is, to turn the solid into a liquid, so that it can be analyzed with reagents).

Step 5: Pre-treatment prior to assay. The main thing is to eliminate the interference of other ions, the existence of the measured components, and minimize the error.

Low. Step 6: Testing. Choosing whether to analyze qualitatively or quantitatively is the most important step. (It's hard to do, hehe.......)Specifically, let's take a look at analytical chemistry at Wuhan University.

Step 7: According to the phenomenon, the result is obtained, and the ionic composition of the ore is seen.

The next step is to give a presentation.

Based on Mohs hardness. The hardness is 1 10

The lowest hardness of 1 is talc, which is about the same as graphite ore, and is so soft that it can be carved by nails.

2 hardness, plaster.

Nail hardness.

3 hardness, calcite.

The hardness of the coin is average.

4 hardness, fluorite.

5 hardness, apatite.

The hardness of the knife is average.

6 hardness, orthoclase. [The hardness of ordinary glass is also 6, you can test it with glass] 7 hardness, quartz. (Crystal).

8 hardness, topaz, agate.

9 hardness, sapphire (corundum, alumina gemstones).

10 hardness, diamond.

Answer: What Inger technology can do. The detection range is very wide, covering metal ores, non-metallic ores, rock ores, iron ores, coal, testing items, conventional physical and chemical indicators, such as moisture, ignition reduction, true density, surface resistance, compressive strength can be done, such as material identification, element analysis, grade identification, unknown composition analysis These can also be done.

The National Nonferrous Metals and Electronic Materials Analysis and Testing Center specializes in testing ore composition and issuing authoritative test reports.

Inger Testing Technical Service (Shanghai)****.

Hello. For tungsten ore: the sample is melted and leached by alkali, and W6+ is reduced to W5+ with titanium trichloride in hydrochloric acid and rental medium, so as to react with thiocyanate to form a stable yellow-green complex, so as to carry out photometric measurement.

MO6+ is also reduced to MO5+, and reacts with thiocyanate to form an orange complex, which affects the determination of tungsten, when the concentration of hydrochloric acid is greater than 3mol L, the color of molybdenum and the complex coarse punch with thiocyanate is very light, which has little effect on the determination. Copper is reduced by titanium trichloride and thiocyanate to form cuprous thiocyanate precipitation, and the influence of copper can be determined by adding formaldehyde to reduce and precipitate copper during leaching. At a wavelength of 430nm, the content of tungsten was determined by absorbance [(high content is used to indicate differential absorbance, and when the content of tungsten is low, ethyl phenyl acetate (7+3) extraction colorimetric method] is used.

This method is suitable for the determination of (WO3) 10-2 in general specimens.

Conventional ore testing items:

1. Component analysis: phase analysis, rock analysis, clay analysis.

2. Elemental analysis: natural collection of unknown samples for analysis and chemical analysis.

3. Ore grade: light sheet identification, microscopic imaging, rock identification.

4. Physical test of rock and mineral: moisture, alkali resistance, acid resistance, true density, volume resistance, surface resistance, transparency, gloss, shore hardness, Mohs hardness, refractive index

5. Porosity (pressure * method, adsorption method, full porosity, closed porosity), specific surface area (ethylene glycol method, gas permeability method, nitrogen method), pore size distribution (micropores), pore volume,

6. Mineral morphology analysis, aspect ratio, filtration rate, abrasion value (papermaking grade filler).