Cement industries typically produce portland cement, although they also produce masonry cement (which is also manufactured at portland cement plants). Portland cement is a fine, typically gray powder comprised of dicalcium silicate, tricalcium silicate, tricalcium aluminate, and tetracalcium aluminoferrite, with the addition of forms of calcium sulfate. Different types of portland cements are created based on the use and chemical and physical properties desired.
Portland cement types I – V are the most common. Portland cement plants can operate con-tinuously for long time periods (i.e., 6 months) with minimal shut down time for maintenance. The air pollution problems related to the production, handling, and transportation of portland cement are caused by the very fine particles in the product.
In cement processing, most of the raw materials used are extracted from the earth through mining and quarrying and can be divided into the following groups: lime (calcareous), silica (siliceous), alumina (argilla- ceous), and iron (ferriferous). Since a form of calcium carbonate, usually limestone, is the predominant raw material, most plants are situated near a limestone quarry or receive this material from a source via inexpensive transportation. The plant must minimize the transporta – tion cost since one third of the limestone is converted to CO2 during the pyroprocessing and is subsequently lost.
Cement making plant
In cement and concrete industry, the cement grinding mill is of significance. Our vertical roller mill owns the largest models in the world. The height is up to 30m and the fineness is 3000 mesh. It accounts for the important position in cement and concrete industry.
Other mining and crushing machines such as circular vibrating screens, vibrating feeders, high gradient magnetic separators, and track mobile crushing stations are also available here. As a result of their high quality and low cost, our cement production lines are all well received among both national and international customers. Our company is situated at Shanghai, an international metropolis in China.
Pyrite Ore Production Line
The magnetic system of pyrite ore production line integrates good-quality iron-oxide body materials with rare earth magnetic steel; the average magnetic induction intensity of cylinder surface is 100-600mT. According to the needs of customers, the Pyrite ore dressing plant can be co-current, half-countercurrent, countercurrent, and so on. The Pyrite ore dressing plant has the advantages of simple structure, big processing volume, convenient operation and easy maintenance, etc.
How to Hunt for Pyrite
1. Learn about the basic characteristics of pyrite, a shiny, metallic mineral that is brassy-yellow in color. Pyrite crystals are often shaped like small cubes or spheroids. You’ll find pyrite as isolated crystals or as aggregates of crystals, depending on the particular deposit.
2. Look for Pyrite in mineral veins where fluids moved through bodies of rock. Mineral veins typically contain the most prized pyrite crystals.
3. Find Pyrite in sedimentary rocks such as shales. These shales, deposited in low oxygen conditions, tend to be dark in color and the pyrite crystals may be scattered or in big accumulations. In addition, pyrite crystals may replace fossils in shales. This type of pyrite is highly sought after by collectors.
4. Purchase a guidebook of mineral collecting in your state or local area. Sometimes state geological surveys will publish guides to help you locate minerals in your state.
5. Gather all of the materials you’ll need to hunt for pyrite. See the list in “Things You Will Need” in this article. Use the hand lens to look more closely at the characteristics of pyrite and use the rock hammer to help excavate the pyrite.
6. Talk to other rock hounds and mineral collectors in your area. They may be able to give you tips on pyrite localities, as well as general tips on mineral collecting. You may even be able to find a buddy to go hunting for pyrite with you.