How to identify copper ore, how to distinguish copper ore

In practical work, it is often found that in some cases, pyrite and chalcopyrite are difficult to distinguish when the color is similar, and the following is a summary of some identification characteristics between them:

1.The color of chalcopyrite is brass yellow or greenish-yellow, often with patchy color (more yellow than pyrite), while pyrite is generally light brass yellow (commonly known as yellow-white), and the two can be distinguished by color in the field.

2.When it is indeed difficult to distinguish, it is carved with a knife, and what can be scratched is chalcopyrite, and what cannot be scratched is pyrite;

3.The color and bright metallic luster of the two are often mistaken for **, so they are also called "fool's gold". The difference with gold ore is to use your hand to shake it, and the feeling is particularly heavy**; In addition, use it to draw on an unglazed white porcelain plate, and you can distinguish the real from the fake by looking at the scratched stripes (i.e., the powder left on the white porcelain plate).

The streaks of gold ore are golden-yellow, and the streaks of pyrite and chalcopyrite are greenish-black.

chalcopyrite, which can be identified by its color and streaks; It is similar to pyrite, but the hardness is not as good as pyrite, and the hardness of pyrite is ; It is similar to gold, but harder than gold and more brittle than gold.

Brass yellow or greenish-yellow stone.

There is only experience, no method. It's best to look at it with a microscope.

Go to the shop that identifies the copper mine.

Copper ore is generally dark red, dark blue, brown or black: copper ore usually has a metallic luster and is soft in texture and prone to lumps or granules. Chemical Properties:

Copper ore can be analyzed by a number of chemical methods, such as chemical reaction method, electrolysis method, and flame test. Density: Different types of copper ore have different densities, and their density can be measured by a pycnometer or density meter.

It should be noted that the above methods require certain professional knowledge and experimental equipment, and it is recommended to seek professional help during actual operation.

Chalcopyrite is the most important copper ore mineral, which is generally composed of three elements: Cu, Fe and S, and the theoretical composition (%) Cu, Fe, S, and the theoretical chemical formula is CuFeS2. General industrial requirements (%) sulfide ore is, cut-off grade Cu, industrial product Cu; Oxide ore, cut-off grade Cu, industrial grade Cu.

Physical properties: chalcopyrite is brass yellow, and the surface is blue and purple-brown with spotted color. Greenish-black streaks.

It has metallic luster, opacity, incomplete cleavage, hardness 3-4, brittleness, relative density.

The morphological characteristics of chalcopyrite: the copper ore is concentrated, the shape is like ginger stone and there is a copper star, the copper is melted and the copper is extracted, and the copper is out of the mountain. The smell is sour, cold, and slightly poisonous.

Pyrite pyrite is an equiaxed sulfide mineral, which is often mistaken for ** because of its light brass color and bright metallic luster, so it is also called "fool's gold".

Chemical composition FeS2, hardness, specific gravity crystal system: equiaxed crystal system.

The pyrite composition usually contains cobalt, nickel and selenium, and has a NaCl-type crystal structure. There are often intact crystal shapes, which are cubes, octahedrons, pentagonal dodecahedrons and their clusters. There are fringes parallel to the crystal edges on the crystal surface of the cube, and the fringes on each crystal plane are perpendicular to each other.

The aggregates are dense lumpy, granular, or nodular. Light yellow (copper) color, streaks greenish-black, strong metallic luster, opaque, non-cleavage, jagged fractures, easy to weathering into limonite under surface conditions.

Pyrite is the most widely distributed sulphide mineral and can be found in all types of rocks. Pyrite is the main raw material for the extraction of sulfur and the manufacture of sulfuric acid.

Chalcopyrite Chalcopyrite is one of the main minerals used to refine copper, one of the most common sulfides after pyrite, and the most common copper mineral.

The chemical composition is CuFes2, and the crystal system is tetragonal.

Hardness 3 4, specific gravity chalcopyrite single crystal is rare, aggregates are often irregular granular or dense blocks. Brass color, the surface often has mottled blue, purple, brown color film, streaks greenish-black, metallic luster. Fracture jagged or shell-shaped, without cleavage, Mohs.

Chalcopyrite is easily mistaken for pyrite and natural gold, but it is distinguished from pyrite by its yellower color and lower hardness, and from natural gold by its greenish-black streaks, brittleness, and dissolution in nitric acid. Under surface weathering, chalcopyrite often turns to green malachite and blue azurite.

Gold ore refers to the gold-bearing ore mined from the mine by hand or machinery, which also contains other metal impurities. Gold is crystalline at room temperature, equiaxed crystal system, cubic centric lattice, natural good crystal shape is very rare, often irregular granular, clumpy, flaked, reticulated, dendritic, fibrous and spongy aggregates.

Copper ore is the ore mined from copper ore, which can be beneficiated to become copper concentrate or copper ore with high copper grade. Chalcopyrite is the most important copper ore mineral, which is generally composed of three elements: Cu, Fe, and S.

First, the shape is different. Gold ore is crystalline, equiaxed crystal system, cubic centric lattice, natural good crystal form is very rare, often irregular granular, clumpy, flaked, reticulated, dendritic, fibrous and spongy aggregates. Yellow ore is like ginger stone and has bronze stars.

Second, the color is different. Copper mines generally see bright copper, very few see bright gold, half of them don't see gold, and generally see chalcopyrite in the stones.

See if the patina corrodes from the inside out.

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The following tests need to be done when testing copper raw ore:1Copper grade:

Copper grade refers to the proportion of copper content, usually expressed as a percentage. Copper in raw copper ore is detected by chemical analysis or instrumental analysis. 2.

Sulfidation rate: Sulfidation rate refers to how much sulfide is contained in a copper ore. Sulfide copper ore can be converted into oxides or sulfates through grinding, flotation, oxidation roasting and other processes.

The sulfidation rate is not only an important parameter for copper ore separation and beneficiation process, but also an important indicator for copper ore mining conditions.

What tests should be done to test raw copper ores.

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The following tests need to be done when testing copper raw ore:1Copper grade:

Copper grade refers to the proportion of copper content, usually expressed as a percentage. The copper in the raw copper ore is detected by chemical analysis or instrument roller analysis. 2.

Sulfidation rate: Sulfidation rate refers to the amount of sulfur decantarate contained in a copper ore. Sulfide copper ore can be converted into oxides or sulfates through grinding, flotation, oxidation roasting and other processes.

The sulfidation rate is not only an important parameter for the formulation of copper ore separation and beneficiation process, but also an important indicator for copper ore mining conditions.

Kiss, there is, 3Impurity element content: Detect whether the content of impurity elements (such as lead, zinc, copper ore, iron ore, etc.) and other harmful substances in copper raw ore meet the specified standards.

These heterocortic spinal elements can affect the extraction and refining process of copper, and even permeate human health. 4.Copper oxide:

Copper oxide (Cu2O) refers to the amount of copper oxide in the raw copper ore. Copper oxide is mainly formed naturally at room temperature and is a common intermediate product in the preparation of copper ingots and copper alloys. <>

Through the above tests, the quality of copper ore can be determined, and the data basis for subsequent processing and production can be provided. <>