Cinnabar, also known as Cinnabar, cinnabar, red lead and mercury sand, is a kind of mercury sulfide (HgS) mineral. It contains 86.2% mercury and is the most important mineral raw material for mercury smelting.
Mercury is also liquid at normal temperature (29.76℃ and 28.44℃). Mercury is a silvery white shiny heavy liquid, which is chemically stable and insoluble in acid and alkali. Mercury can evaporate at room temperature, and mercury vapor and mercury compounds are very toxic (chronic).
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Identification of authenticity of cinnabar
Natural cinnabar is a granular or massive aggregate with massive or tiny glumes of different sizes. The surface of large blocks is dark red, the surface of small blocks or particles is bright red, and the irregular blocks are bright red, as bright as a mirror, diamond-like and translucent. Fragile, hardness 2-2.5, specific gravity 8.09-8.20, striped vermilion to maroon.
Artificial cinnabar is purple irregular block or vermilion particles and powder. Insoluble in strong acid, soluble in sodium sulfide and aqua regia.
Physical and chemical identification of the authenticity of cinnabar;
1, heated in a closed test tube and turned into a black vulcanizing pump; When sodium carbonate is heated, it becomes metallic mercury ball.
2. Sulfur dioxide gas and metallic mercury balls are produced by burning in an open tube.
3. After the fine powder is soaked in hydrochloric acid, it is rubbed on a clean copper sheet, and the surface of the copper sheet is silvery white.
mineral resources
Mercury is a naturally occurring element, which exists in air, water and soil.
Mercury is a highly toxic and non-essential element, which widely exists in various environmental media and food chains (especially fish), and its traces are all over the world.
The world's mercury resources are about 700,000 tons, with a basic reserve of 300,000 tons. The main countries with mercury reserves and their basic reserves are 90,000 tons in Spain, 69,000 tons in Italy, 8 1400 tons in China and 45,000 tons in Kyrgyzstan. Mercury deposits in the world are mainly distributed in the Tethys-Himalayan tectonic belt.
The main type of mercury deposit is carbonate, followed by clastic rock and magmatic rock. Among them, carbonate type is the most important, accounting for 90% of mercury reserves.
Mercury minerals are located in the lower CAMBRIAN strata, and their production and enrichment are strictly controlled by structure, rock assemblage and wall rock alteration. The main ore bodies are layered, layered-like, and layered lenticular, which have obvious stratabound characteristics and belong to stratabound deposits. It is recognized as the most typical "layered mercury mine" in China, which is of great significance to mercury exploration and research at home and abroad.
The ore is single, mainly cinnabar. The output is mainly dotted and disseminated, followed by pulse and stripe. Good mineral processing and metallurgical properties.
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