Pyrrhotite
[Chemical composition] The theoretical value of FeS is Fe63.53% and S36.47%. However, the nature of output pyrrhotite often contain more S, up to 39% to 40%. In the composition, Ni and Co are the same as the same type of Fe. In addition, there are Cu, Pb, Ag, and the like. Part of Fe 2+ in pyrrhotite is replaced by Fe 3+ . In order to maintain the balance of electricity price, some vacancies exist in Fe 2+ in the structure. This phenomenon is called “absence structureâ€. Therefore, the composition is non-stoichiometric, and is usually expressed by Fe 1-x S (where x = 0 to 0.223).
[Crystal Structure] See the crystal structure description of red arsenic nickel ore below.
[Form] It is usually a dense block, a granular aggregate or a disseminated form (Fig. L-8). Single crystals are often plate-like in parallel {0001}, and a few are columnar or barrel-shaped. Form twin or triple crystal.
Figure L-8 The pyrrhotite is a dense block assembly
[Physical properties] ancient copper dark yellow, often with surface POH brown color; gray - black streak; metallic luster; opaque. Cleavage is not developed; {0001} crack development. Hardness 4. The relative density is 4.6 to 4.7. Crisp. Conductive and weak to strong magnetic.
[genesis and occurrence] The main occurrences of pyrrhotite are:
(1) Copper-nickel sulfide magma deposits produced in basic rock bodies are closely symbiotic with nickel pyrite and chalcopyrite.
(2) produced in the deposit account of the contact, symbiotic with chalcopyrite, pyrite, magnetite, iron sphalerite and arsenopyrite minerals formed mainly in later stages skarn process.
(3) hydrothermal deposits produced in the series, such as cassiterite sulfide deposits, and cassiterite, galena, sphalerite, chalcopyrite and other symbiotic. In the oxidized zone, it is easily decomposed and eventually converted to limonite.
[Identification features] dark ancient copper yellow, low hardness, weak - strong magnetic.
[Main use] is the production of ore mineral raw materials for sulfuric acid, but the economic value is far less than that of pyrite. When Ni is high, it can be used as a comprehensive utilization of nickel ore.
Spiral wirelink conveyor belts are manufactured in compliance with the latest food safety requirements for food processing equipment. It can be used for heat treatment, metal processing, food processing, leisure food production and ceramics production etc.Spiral wirelink belts are suitable for a wide range of active food contact applications such as:
- Baking
- Frying
- Drying
- Cooling
- Freezing
- Pasteurizing
For now, Wire Mesh Conveyor Belt is mainly divided into major categories: Chain Driven Mesh Belt is widely used in spiral freezer machines; Spiral Mesh Belts are suitable for the conveying of small and high density materials; Eye Link Belt is suited to convey heavy loads and unstable or fragile products that require good support from the conveyor belt; Balanced Weave Belt is extensively applied for conveying parts of metallurgy, food processing, pharmacy, glass print, special equipments; Flat flex belt is mainly used in for quick-frozen food, fried food, sugar machine, chocolate coating with a variety of bread and pastry food baking conveyor line; Flat Wire Belt is usually used for the equipment of cooling, drying, bread production, washing, sorting and products processing, etc. In a word, according to the use environment and clients` special requirements, we can be able to give them different type of conveyor belt.
Spiral Mesh Belt,304 Metal Belting,316 Mesh Belting,Stainless Steel Spiral Belt
Hebei Risen Imp&Exp Trading Co.,Ltd , https://www.wirebeltconveyor.com