Mineral processing is characterized by a constant adaptation to changing raw materials and market conditions. It is the link between the mined raw material and a marketable product. As a lot of high grade reserves are exploited, a steady deterioration of raw material quality can be observed. At the same time, the customers' requirements for product purity and consistent quality increase.
Over the last years beneficiation techniques for iron ore have become more important in order to achieve a maximized utilization of ore resources and to produce competitive products according to international standards.
LIPU has been engaged in hematite iron ore beneficiation with its gravity separators since the mid nineties. The delivery of jigs started for the upgrading of iron ore for its utilization in a Direct Reduction Plant in Australia. Since then, various other installations with jigs for lump and fines as well as upstream separators for fines are in operation in Brazil, Australia, India and South Africa. Low grade run of mine and/or dump ores are being processed with FOX©- and gaustec separators as the core equipment.
This paper describes the project of a 1500 t/h beneficiation plant for haematitic iron ore in India. The data presented show the entire project from flowsheet development to plant engineering and construction. It focuses on the specific advantages of jig application on iron ore upgrading due to the possible high gravity cuts and the easy and low cost operation. The gaustec wet high intensity magnetic separators offer high capacity in combination with unsurpassed process flexibility.
A mining company in India intends to produce calcium carbonate powder with fineness of 5-10 micron; required capacity is 1.0 ton per hour. They had a Raymond mill which can not meet their desired fineness. Their stone input size is 12"-14". They have a primary 16"-10" jaw crusher. Based on customer's situation, we had recommended full set of SCM221 Ultrafine mill for their solution. The mill was installed since 2009 and is running perfect in India now.
Raw material of 12"-14" size is primarily crushed by the client's jaw crusher down to 2" and then enter into our hammer crusher PC400×300, after secondary crushing, it will be less than 0.4", and discharged to bucket elevator. The elevator sends the material to storage hopper, there's a vibrating feeder under the hopper, the feeder feeds material to main unit of SCM221 mill evenly and continuously. When the material being ground in the mill, the blower blows the powder to classifier, the classifier impeller is rotating at adjustable speed which is controlled from control cabinet, as per client's requirement, powder less than 10 micron will be separated by classifier, and bigger powder falls down, being reground over and over again. 10micron and less than 10micron powder then go to the cyclone collector with the air from blower and be collected in the cyclone collector. Powder will be discharged from the discharge valve to become the final products. The bag filter will clean the outgoing air to protect the environment.
As a material supplier for a paper making company, a factory from Belgium needs a mill to get limestone powder. The required output size is D90=105ù渭m, required capacity is 3-5t/h.
Since this client just needs medium output size, our MTM Medium Speed Trapezium Mill will be suitable for him; and the required capacity is low, so the small model MTM100 is his best choice.
Under guidance of our engineer, they have finished the installation and commissioning. The classifier is adjusted for required size and the capacity has reach to more than 4t/h. Now the plant is running stably with good performance.
Tajikistan is an important mining machine market for every mining equipment manufacturer. Also for LIPU machine. In the past few years,LIPU mining equipment helped Tajikistan to be significant to world mineral markets as a gold producer. Especially in the antimony mining, Tajikistan possessing the largest deposits of antimony in the former Soviet Union, and having more than 400 explored mineral deposits, containing 70 types of minerals largely brought LIPU grinding mills.
In the mining of 2000 in Tajikistan, the gold mill production was 2,700 kg; gypsum mill production, 35,000 tons; and antimony mill production, 2,000 tons. LIPU grinding mills in Tajikistan also participate in producing bismuth, lead, mercury, silver, cement, and fluorspar. No copper, molybdenum, tungsten, or zinc has been produced by LIPU in recent years. Gold mining crushers and grinding mills was widely used in southeast of Gharm, in the Pamir Mountains, in the Yakhsu Valley, in Chkalovsk, and in the Jilau, Taror, and Aprelevka deposits;Industrial mills was widely used at the Dzhizhikrutskoye deposit, north of Dushanbe; antimony, at Isfara and Dzhizhikrutskoye. At the same time, other mining mills are well used in Tajikistan.
Copper ore mines distribute all over the world, Chile is the largest producing area. The northern desert contains great mineral wealth, principally copper. Natural copper storage form include Bornite, Cuprite, Chalcopyrite, Malachite, Tennantite, Tetrahedrite and Chalcocite. Chile copper ore benefication industry grows faster and gains more profits. And Copper is 100% recyclable without any loss of quality whether in a raw state or contained in a manufactured product. we already serve many copper mining customers all over the world, as professional copper dressing machine manufacturer and turnkey solution designer, we are always stand by for your demands and questions.
Chile's early roots-having an economy mostly reliant on mining meant that in order for miner to survive in the country they would have to possess deep pockets. Chile's industry is still dominated by big companies- such as BHP Billiton, and most importantly the state owned mining Mecca, Codelco. This miners have been able to tough it out through tough times. But now, with the current copper rally- exploration is heating up. There are dozens of juniors now exploring the region. State-owned Codelco, Chile's largest mining firm, alone controls approximately 70 percent of the nation's reserves. Escondida is a copper-gold-silver mine is located in the arid, northern Atacama Desert about 160km southeast the port of Antofagasta.
No matter SMA or superpave pavement technology is adopted,asphalt concrete road surface of high way is demanding or aggregate shape and size proportion.Under this condition,the traditional technics adopting impact crusher can not meet the requirement.Therefore,new crushing and screening technics adopting vertical shaft impact crusher of highway pavement perfectly.Aggregate with high quality produced by this technics has been widely used in construction of many highways.
Features of the basalt crushing plant:
1. High aggregate quality, content of thin and flaky grains less than 5%. Jaw crusher and cone crusher crushing technics is used in a dolerite mine in Africa, among finished products content of thin and flaky grains is more than 10%, thus bag sales is resulted.After technology reconstruction using vertical shaft impact crusher in this time, content of thin and flaky grains be reduced to 4.7%.
2. Compared with production line using cone crusher as the last crushing procedure, the capacity increases by 50%.
3. As cone crusher is only the secondary crusher, wearing parts consumption of vertical shaft impact crusher is very limited, and total wearing parts consumption of complete production line be decreased significantly.
Lipu Heavy Industry Co.,Ltd is a leading manufacturer of curshing,grinding,beneficiation and cement machines with advanced level in R&D. Our company will design economical and reasonable produce line regarding to different clients' inquiry.
The United States is the largest phosphate rock produc er in the world. About 30% of the world production in 1990 was produced by the United States (Bartels and Gurr 1994). This level of production has continued to the present. The State of Florida generates approximately 70% of the U. S. Annual phosphate production of about 40 million tons (Harben 1980). A typical phosphate beneficiation process in central Florida includes washing, classification, fatty acid flotation, acid scrubbing, and amine flotation. The upgraded phosphate concentrate is used for toothpaste, detergents, food, fertilizers, etc. Approximately 95% of produced phosphate is consumed in fertilizer plants where phosphorus, together with nitroge n and potassium, is utilized as the major nutrient for plants.
In fertilizer plants, phosphate is used to produce phosphoric acid by reacting phosphate with sulfuric acid. The phosphogypsum crystals formed during this chemical reaction are discarded and the phosphoric acid is further processed to give the finished fertilizer product. To increase the chemical reaction rate, phosphate rock is ground to fine particle sizes prior to the chemical reaction process. It usually takes 10-15 minutes of grinding to reduce phosphate size to more than 40% -200 mesh. The direct operating costs in grinding are mainly the energy cons umed and the metal lost through wear and corrosion. Fine grinding of phosphate is en ergy intensive and more than 60% of the electrical energy consumed in the phosphate fe rtilizer plant is used in grinding phosphate rock. Thousands of tons of grinding medi a is consumed in phosphate chemical plants every year. Reducing wear and corrosion ra tes will significantly reduce the grinding costs and improve the grinding efficiency by maintaining optimal grinding ball size.
Previous efforts to reduce grinding medi a consumption were mainly on finding the most wear-resistant metal, e.g., high-ch romium alloys, and significant improvements have been achieved. However, high-chromium alloys are rather expensive. Reduced consumption rate of metal alloy will resu lt in significant savings for the Florida phosphate industry.
This research program was intended to minimize the corrosive wear of the mill liner and grinding media by developing an e ffective cathodic protec tion process based on the impressed current principle. The cathodic process protects the mill from corrosion by impressing a cathodic current to the mill, lowering its electrochemical potential to a value at which its oxidation reaction or corrosion rate is negligible. This also helps to reduce the abrasive wear rate by eliminating the synergistic effects between corrosion and abrasion.
Corrosion is the destructive attack of a metal by chemical or electrochemical reaction with its environment. Deterioration by physical causes is not called corrosion, but is described as erosion, galling, or wear. In some instances, chemical attack accompanies physical deterioration as described by terms of corrosion-erosion, corrosive wear, or fretting corrosion. Nonmetals are not included in the presen t definition. Plastics may swell or crack, wood may split or decay , granite may erode, and Portland cement may leach away, but the term corrosion is presently restricted to chemical attack of metals.
To the great majority of people, corros ion means rust, an almost universal object of hatred. Rust is, of course, the name which has more recently been specifically reserved for the corrosion of iron, while corrosion is the destructive phenomenon which affects almost all metals. Although iron was not the first metal used by man, it has certainly been the most used, and must have been one of the first with which serious corrosion problems were obtained. It is not, therefore, surprising that the terms corrosion and rust are almost synonymous.