Antimony minerals, particularly stibnite, have been known and used since ancient times. Because it is so soft, stibnite was used in ancient times as black eye makeup. The Roman historian, Pliny, wrote about its use as a medicine. Artists used finely-ground stibnite in the Middle Ages as a black pigment. Ancient “scientists” were interested in antimony because of their belief that it may be useful in the process of changing common metals into gold. This field was known as alchemy.
Antimony is a native element,antimony metal is extracted from stibnite and other minerals. Antimony is used as a hardening alloy for lead, especially storage batteries and cable sheaths, also used in bearing metal, type metal, solder, collapsible tubes and foil, sheet and pipes, and semiconductor technology.
The most important use of antimony is in chemicals used to impregnate plastics, textiles, rubber, and other materials as a flame retardant – that is, a form of fireproofing.Over half the annual U.S. antimony consumption is for the manufacture of flame retardants.
Antimony is mixed with other metals and turned to alloyed,such as lead, to make the lead harder and stronger for use in lead-acid batteries.On the other hand,some alloys such an an alloy of antimony,tin,copper,and sometimes lead are useful as machine bearings because they are soft and slippery.Antimony is also alloyed with tin to make pewter items such as plates, pitchers and cups, used mostly for decoration.
Antimony is also used for pigments in plastics, paints, rubber and for a wide variety of minor uses, including medicines, fireworks, and others. Antimony oxide is a brilliant yellow color, accounting for much of the pigment use.Stibnite is used for metal antifriction alloys, metal type, shot, batteries, and in the manufacture of fireworks. Antimony salts are used in the rubber and textile industries, in medicine, and glassmaking.
Most of the antimony mined each year comes from China, which supplies over three-quarters of the world total. The remainder is from Russia, South Africa, Tajikistan, Bolivia, and a few other countries. Some antimony is produced as a by-product of smelting ores of other metals, mainly gold, copper and silver, in countries such as the United States, Canada, and Australia.
Cement factory is a cement production line which process all kinds of stone,sush as shale,gravel and so on into the cement material of very fine.It often consist of cement jaw crusher,cement impact crusher,cement cone crusher,cement ball mill and other auxiliary equipment like cement vibrating feeder,cement vibrating screening and so on.Every parts matches each other well.
In recent years,Italy is vigorously develop tourism.To receive a large number of tourists,the original infrastructure can not meet the needs of the large number of tourists.So many local government support for construction of tourist attractions.In the construction process,the cement has become an essential one in the building and more and more popular in Italy.
Zenith’s cement factory is the best one in the industy.For Zenith is the best manufacturer of cement factory.Zenith cement factory equipped with a high-performance equipment and all parts matches good,runs smoothly and can be a month of continuous uninterrupted production.
The structure is compact,small footprint,saving space. Zenith cement factory also has a great production capacity and crushing efficiency is very high.Any material which can be bonded if add water can be process into the cement by it.
Zenith’s products are in strict accordance with international standards for production.Combined with years of production experience,our engineers developed the world’s leading product technology and applied products.In the production process,Zenith also strictly follow the production process inspection of raw materials from the product to the output of the final product.
Arsenic is a toxic and known to metals, and there are many allotropes. Arsenic widely found in nature, there are hundreds of species of arsenic minerals have been found.Because of weak bonding between the layers, gray arsenic is brittle and has a relatively low Mohs hardness of 3.5.
Arsenic metal very rarely occurs in its pure form in nature. The most common arsenic mineral is arsenopyrite, a compound of iron, arsenic, and sulfur. Several other, less-common minerals contain arsenic, including orpiment, realgar, and enargite, which are arsenic sulfides.
Arsenic and its compounds are used in pesticides, herbicides, pesticides and many kinds of alloys.Formerly the most important use of arsenic compounds, was as an insecticide sprayed in fields and orchards.
Only about 5% of arsenic consumption is of the metallic element. Most of this is used to alloy (mix) arsenic with lead, copper, or other metals for specific uses.As a metalloid, arsenic is a semiconductor, like silicon.This means it conducts some electricity like a metal,but not all the electricity a true conductor like copper would conduct. Consequently, about 1/10 % of arsenic is consumed in the manufacture of gallium arsenide semiconductors for use in electronics. Some arsenic is also used in glass-making.
Significant quantities of arsenic are associated with the copper-gold deposits in Chile, the Philippines, and many other countries. However, many countries produce by-product
arsenic from smelting of metal ores. China is by far the largest producer, with Chile, Mexico, and Peru also important, and lesser production from about a dozen other countries
with metal smelters.
Common ore production line generally has a variety of different stages of processing equipment combination.This production line is characterized by the largest stationary.It is generally installed directly open ore output,the on-site operations.The greatest advantage of this production line is large output.Traditional sand screening machine is one important part of it,so it also has the feature of stationary and large output.
In Australia,portable sand screening machine is a new screening machine fifferent from the traditional sand screening machine.It can move directly to any desired occasion without doing any foundation and installation,Which is the most attractive new design of the portable sand screening machine.
The excellent capacity and easy adaptability to different crushing and screening processes guarantee suitability for a wide range of quarrying and contracting applications.Easy to adapt and flexible to collocate with other machine, meeting the different product requirements of different customers.With the track-mounted screen,you can choose flexibly and accurately the end product fractions to be screened.
By using the portable sand screening machine in Australia,on the one hand,we can classift the gravel with different size by adjust the screen.Thereby facilitating the benefication and the next process.On the other hand,the sand for screening can be very good to improve the quality of the final product,and even affect the purity of the final output of concentrate.
Concrete is defined by the cementitious material aggregated into the overall project cemented composite material collectively.Concrete is commonly used as a cementitious material with cement,sand,stone for aggregate and with water,additives and admixtures certain proportion by mixing,forming,curing concrete derived, also known as ordinary concrete.It is widely used in civil engineering.
Concrete has the characteristics of abundant raw materials,low cost,simple production process.Thus the amount of it is increasing.Meanwhile,concrete also has a high compressive strength,durability,strength grade wide range of features.These features make use of a very wide range,not only to use in a variety of civil engineering,but also in the shipbuilding,machinery,marine development,geothermal projects,concrete material is also important.
Cement concrete is an artificial stone,using cement as cementing materials,mixing with water and coarse and fine aggregates and other materials,then obtained after pouring molding.New mixing unhardened concrete,typically a concrete mixture.There is a certain strength of hardened concrete, said hardened concrete.Usually refers to the concrete in pavement engineering,asphalt concrete is also a common concrete.
In addition, according to the compressive strength of concrete,it can be divided into: low-strength concrete (compressive strength less than 30MPa), medium-strength concrete (compressive strength 30-60Mpa) and high strength concrete (compressive strength greater than or equal 60MPa).Per cubic meters of cement can be divided into: lean concrete (cement content not exceeding 170kg) and rich concrete (cement content of not less than 230kg), etc.