Monthly Archives: July 2012

Mineral ore processing plant design

kefidchina | July 31st, 2012

Mineral ore are the important material to extract metal elements or mineral elements. In the earth, there are many types of mineral ore. These mineral always exists in different rock or stone, we need use some ore crusher, ore grinding machines, and ore beneficiation machines to process them.

Mineral ore types

According to the structural state of minerals and ore content，ore deposit minerals can be divided into the ore mineral, ore-bearing minerals and minerals ore containing mineral three categories. Such as gold ore, iron ore, chrome ore, nickel ore, copper ore, cobalt ore, uranium ore and soon. So as to get high grade metal elements or mineral elements which are the important ingredient in modern industry. China Kefid is a leading company in china, we supply high quality mineral ore crushing and grinding equipments and design the suitable processing flow for global customer.

Mineral ore processing equipments

Mineral ore crushers are the important equipments in mineral processing, crusher can crush mineral ore to a suitable size which are adapt to the feeding size of grinding machines. In the mineral ore crushing process, raw ore will be sent to vibrating screen after primary crushing. The top products will be crushed again and then mixed with the middle products for together secondary crushing. The finished products are then screened out. After screening, the final products will be sent into ball mill ore Raymond mill for grinding. There can be secondary grinding according to products size.

As for ore crusher, customer can choose different types according to the types of the mineral hardness. There are gold ore crusher, iron ore crusher, chrome ore crusher, nickel ore crusher, copper ore crusher, cobalt ore crusher, etc. Customer usually choose jaw crusher for primary crushing equipment and cone crusher for secondary crushing while short head cone crusher is used for fine crushing. To increase production and equipment utilization factor, Ore beneficiation plant generally follows the principle of more crushing with less grinding to reduce the size of ore into the grinding mill.

Mineral ore grinding process plays an important role in mineral ore processing plant. The mieral ore grinding mill grind the crushed ore minerals into fine even ultrafine powder so that the leaching and smelting process can go smoothly.

Mineral ore grinding mill can be divided into wet grinding type and dry grinding type. Because of these different applications, there will be open-circuit grinding and closed-circuit grinding process. Kefid Machinery can design different type of mineral ore grinding equipments for customers according to different requirement. The common ore mining machines are ball mill, raymond mill, vertical roller mill and MTW trapezium mill.

Mineral ore beneficiation process is also very important if customer need higher grade mineral. After crushing ore grinding, the mineral ore powder is fed into the SAG mill along with water, and then convoyed to ball mill for further grinding which reduces the mineral ore to slurry. The slurry fine enough passes through the trammel to primary hydrocyclone which uses centrifugal and gravitational forces to classify the rock particles according their size. It passes through the thickener to remove some of the water, and the moves into the leaching circuit.

Mineral ore processing flow design

Different mineral ore processing have different flow design. Kefid have our own engineer team, we can design suitable mineral ore processing plant for our customer. By now, we have design hundreds of mineral ore crushing plant, mineral ore grinding plant, mineral beneficiation plant. Such as iron ore crushing plant, iron ore flotation process, beneficiation of chrome ore, gold ore dressing machines and plant, silver ore processing plant, chrome ore milling plant, copper ore beneficiation plant, etc. We also provide global service, so please click to see more information or help.

Category: Grinding Plant Cases

TAGMineral ore beneficiation plant , Mineral ore crushing plant , Mineral ore grinding plant

Construction waste crushing and recycling plant

kefidchina | July 28th, 2012

Construction waste or building rubble is very common in the construction of the cities. How to crushing these construction waste and take full advantage of the recycling is very important. China Kefid machinery company is the most professional enterprise in construction industry. We can proce with you with construction waste crushing and screening machines. Crushers like jaw crusher, impact crusher, but mobile crushing plant are widely chosed by customers in construction waste crushing and recycling.

Construction waste analysis

The main material of the construction waste are concrete, glass, porcelain, marble, granite, bricks, blocks, asphalt and reinforced concrete. Building rubble crushers can be fed by a mini excavator or skid steer. Processing capacity between 50-500 tons per hour, the size of the product can be varied depending upon customers’ requirements.

Usuallly, concrete is the main material of these buliding waste, so how to crush the concrete is main processing. Concrete can be divided into different types, inorganic cementitious material concrete, such as cement concrete, gypsum concrete, silicate concrete, silicate concrete, etc.; organic cementitious material concrete, such as asphalt concrete, polymer concrete, etc.

Stationary construction waste crushing and recycling plant

Kefid company can design a suitable stationary crushing plant according customers’ requirement. The common configuration construction waste crushing plant are: vibrating feeder, jaw crusher, impact crusher, vibrating screen, etc. Jaw crusher is popular known as primary crusher which can reach a high crushing ratio and the shape of final product is even. It can crusher large size concrete and rock into small size. Impact crusher is used as a secondary crusher. Kefid impact crusher is suitable to crush various kinds of ores and rocks of medium or above medium hardness. After crushing and screening process, the final products (1mm to 4mm) are collected.

Mobile Construction waste crushing and recycling plant

Mobile crushing plant is widely used in these days. Compared with stationary crushing plant, mobile crushing are easy to operate and low cost. The most important reason is its easy to move. As we all know, there are many construction project, and they are not in one place. But mobile crushing plant can move from one place to another place. Cost are save in the whole process. Kefid have mobile crushing palnt and mobile screening plant, they are designed for the construction waste crushing and recycling. If the construction waste crushing environment is not very good, then we recommend to you our crawler type mobile crushing and screening station which can suitable for various crushing environmental.

Category: Crushing Plant Cases

TAGbuilding rubble recycling plant , Concrete crushing plant , Construction waste crushing

Iron ore processing equipments and flow design

kefidchina | July 27th, 2012

Iron ore processing equipments are widely used in iron ore plant. As we all know, iron is an important resource, especially for steel enterprise. In order to get high purity iron, there always have crushing, grinding, beneficiation process to processing natural iron ore. In theory, ore that contains iron elements or iron compounds iron can be called iron ore. But, in industry or business, iron ore not only contain iron ingredients, but also have the use value. Iron exists in nature the state of the iron compound, Such as hematite, magnetite, siderite, limonite and so on.

Iron ore processing equipments

General, iron ore processing plants are composed by vibrating feeder, jaw crusher, vibrating screen, ball mill, classifier, magnetic separation machine, concentrating machine, dryer and other major equipments. But a complete iron ore crushing and dressing processing line also need equipped with feeding machine, hoist, conveyor belt and so on. The iron ore processing production line has the advantages of efficiency, low-power, productivity high, reasonable economy, etc.

Iron ore processing flow

First, vibrating feeder feed large size of iron rock or ore into crushing equipments for primary crushing, usually primary crushing is jaw crusher, which will process material to small size.

Second, rocks after crushed will be separated into different size by vibrating screen. Large size material will send back to jaw crusher or send to secondary crushing machines (cone crusher) for recrushing. Other iron ore granule( about 0.5mm to 5 mm) will come into next stage.

Third, vibrating feeder send iron ore into hopper and evenly distributed by vibration motor The capacity of output size can adjusted through the handwheel. Through control the speed of motor drive speed table, can control the output of magnetic separation machine and concentrate grade. After this stage, it can get the high grade iron ore grain.

Last, ball mill is important equipment in iron grinding and beneficiation, other grinding mill such as vertical mill or Raymond mill etc can also be used in iron ore powder making. Through the process of iron flotation or gravity separation, it can get the high purity iron.

Iron ore processing plant should be as far as possible the efficient and simple, such as choose suitable machines, design a most effective processing flow, energy conservation and environmental protection. This is very important factor in the iron crushing and iron ore benficiation. If you need more, please contact with Kefid company for equipments selection or technical support.

Category: Crushing Plant Cases

TAGIron ore beneficiation , Iron ore processing equipments , Iron ore processing flow

Frequently Asked Questions

kefidchina | July 26th, 2012

FAQ means frequently asked questions. Here are some questions that customers usually ask for us. In order to provide better service to our customers, we have sorted a part of the problems, we hope them can help you about our crushing machines, grinding machines, crushing plant. If you need more, please click to have a free chat with out online service.

Crushing Series

1. Ask: How many kinds of quarry machines in mining and crushing industry?

Answer: Generally speaking, quarry machines in mining and crushing industry include various kinds of stone crushers, sand making machines, grinding mill, vibrating feeder, and sand washing machines. For KEFID, mobile crushing plant, VSI crushers, VSI5X crushers, trapezium mills, and cone crushers are best-sold to all over the world.

2. Ask: I want to crush limestone, which type crusher should I get?

Answer: Usually impact crusher is very suitable for crushing limestone, please kindly tell the feeding size and final size you need to confirm whether you also need primary jaw crusher and tertiary crusher.

3. Ask: The advantage of wheel type mobile crusher?

Answer: There are several advantages of the wheel type mobile crushers: It is very convenient to move from the sites to sites, and do not need too much foundation; It can take less land than the stationary one; it will take less time to build at the site

4. Ask: Could you please recommend us a production line for highway construction?

Answer: For construction of highway, high-speed railway and hydropower, standard of concrete aggregate is very high, such as grain shape, and equipments standard, especially for crushing of basalt(Diabase, limestone). In the traditional two-step crushing, much material of flakiness shape will be generated, which will not be able to meet the very requirements. To solve this problem, we have got deep cavity vertical shaft impact crusher, JC series jaw crusher, European tech impact crusher and hydraulic cone crusher, which are specially designed to match the requirements with good grain shape and less content of flakiness materials below 5% and have successfully served many highway constructions both at home and abroad.

5. Ask: Which equipments can be used in sand making plant of your company？

Answer: The sand production line is generally composed of vibrating feeder, jaw crusher, sand making machine, vibration screen, sand washing machine, belt conveyor, assemble electricity control; In KEFID MACHINERY the full set sand production line will offer you with comprehensive technological support, the general capacity is 50-500t/h. The internationally advanced VSI crusher researched and developed by our company matched with the other series of products forms an internationally leading position in this industry.

Grinding Series

1. Ask: I want to grind quartz 150- 350 mesh for 2 ton per hour, which machine is suitable for me?

Answer: If you need the final product without iron , I recommend you ball mill . if there is no demand of the iron content in the final product, I recommend you our MTW grinding mill , which is lower investment cost and operation cost

2. Ask: Could you supply a ceramic lined mill to produce high purity silica flour? What grinding media would you recommend?

Answer: We do manufacture ceramic lined mill which can produce high purity silica flour, which grind material with ceramic balls, which is generally called ball mill. If you want more information, please contact us, we are always ready for you.

3. Ask: How about fineness of mineral powder made by mill from Kefid?

Answer: Kefid has dozens of kinds of mills and hundreds of models in total. Different mill can make mineral powder of different fineness. Kefid can provide mill to make mineral powder from 3mm into as fine as 5microns.

4. Ask: Must the air heating furnace of Vertical grinding mill be configured? How to confirm its model?

Answer: As to the natural storage materials, the air heating furnace of vertical grinding mill must be configured, unless the materials are dried. It is better to use an air heating furnace to dry the materials so that the fine powder after grinding will be flew out quickly to improve the capacity. It is decided by the structure of grinding pan. If the wet materials are not dried, the capacity will be reduced, and it also will influence the operating stablity of the vertical grinding mill. The model of the air heating furnace is decided by the moisture content of the materials. The wet materials need larger power air heating furnace. In contrast, the dry need smaller power.

5. Ask: Please send me the price of Raymond mill to grind phosphate to 600 mesh?

Answer: According to your demand, Raymond mill is not suitable as the final size you need is very fine, HGM micro powder grinding mill is needed, the catalogue is attached, please check it. By the way, please kindly tell me the capacity you need per hour, then the best solution will be provided accordingly.

Category: Solution & FAQ

TAGFAQ , Frequently Asked Questions

Coal Mining and Process Plant

kefidchina | July 25th, 2012

Kefid is a professional coal mining, coal crushing and coal grinding equipment suppliers in China. With 20 yesrs of manufacturing experience, we not only can provide with suitable coal ore processing machines, but also can design best coal processing schemes to our customers, and with best global service.

Coal Mining Plant

Coal mining mainly is surface mining, this will recovers a higher proportion of the coal deposit than underground methods. Equipments used in coal ore mining plant includes: draglines, which remove the overburden (the term given to the strata between the coal seams and the surface); power shovels; large trucks, which transport overburden and coal; bucket wheel excavators; and high capacity conveyors. Surface mining equipment has increased dramatically in size over recent years. However, in some countries, the high capital cost of importing this equipment can favour the selection of underground mining.

Coal Crushing Plant

Coal ore are in different size when they are mined out, In order to meet different use, coal can be crushed to different size.

Many coal crushing equipments can be used in coal crushing plant, according to the characteristics of coal. Coal crushers including jaw crusher, impact crusher, mobile coal crusher and so on. Which coal crusher are used in the coal crushing plant depending on the physical and mechanical properties of materials, particle size and the requirements of broken than to decide.

Some coal is a mixture of coal and waste rock symbiotic parting of coal, in order to choose the coal that needs to be broken into smaller particle size, separation of coal and waste rock. The most common case is to be elected in the primary election machine coal crushed to 13mm or 6mm following, and then sent to re-elect re-election machine. According to the product size broken, broken job can be divided into coarse pieces (the crushing to 50mm and above), in pieces (broken into 25-6mm), small and fragmented (broken into 6-1mm), crushed (1mm or less).

Coal Grinding Plant

Coal grinding mill is also the necessary equipments in coal process. Customer who need more thin coal powder can use coal mill. Such as vertical mill, high pressure grinding mill, micro powder mill etc. Coal grinding plant mainly have the host, blowers, ultra-fine analysis machine, finished powder cyclone plot device, bag filter and connecting duct pipes and other components, according to user needs can be equipped with elevators, storage silos, control cabinet, to the powder machine, crushing machines and other auxiliary equipment.

Kefid machines are exported to more than 100 countrys, we can provide with you best coal processing machines and processing plant, both fixed coal crushing, grinding plant and mobile coal crushing plant, need more help, please contact with our online free chat service.

Category: Mining Plant Series

TAGCoal mining plant , Coal ore crushing plant , Coal ore grinding plant

Kefid crushing equipment through the GOST Certificate

kefidchina | July 25th, 2012

Recently, good news comes from Kefid constantly. Just in this morning, our full set of crushing equipments through the Russian GOST Certificate.

This certificate affirms that the goods delivered in Russia, and/or production line where they were manufactured, conform to the Russian Safety Standard.

This certificate will be helpful for Kefid to establish good business relationships with Russian people. It is greatly convenient for our equipment entering into the Russian market, customer clearance will be easier, and solve the customers extra worries!

Category: News Of Kefid

TAGcrushing equipment , GOST Certificate

Stone Crushing and Screening Line

kefidchina | July 24th, 2012

Stone crushing and screening line is successful application in limestone, granite, graystone, marble etc. stone process, so as to meet the national standards of stone or sand, which are widely used in construction, road, railway, water conservancy, concrete mixing plant. The stone crushing line provided by kefid have the advantages of high degree of automation, large capacity, high efficiency, large quantity, cube shape of final materials and so on.

A complete stone crushing and screening line usually include: vibrating feeder, primary crusher, secondary crusher, vibrating screen, conveyor belt, and electric control panel and so on. In order to meet different customers’ requirement, kefid company also can provide vertical shaft impact crusher to reshape the final products and dust removal equipments to purify environment. When crushing and screening, raw materials are first put into primary crushing (Jaw crusher), then the belt conveyor transfers the elementary products to the secondary crushing machine for secondary crush. Secondary products will be separated into two kinds by the vibrating screen. The parts satisfying the standard of the vertical shaft impact crusher will be conveyed to the sand making machine and the other parts will return to the secondary-crushing machine.The suitable size will be transferred to the vsi crusher, this forms a closed circuit manifold cycles. So as to get the customer required products and used in construction and manufacturing industries.

Stone crushing line has two types, stone crushing plant and sand making plant (the final size of which are below 4 mm). Every crushing plant have different equipment configuration according to customer different material, capacity, final products, etc. Kefid company have a professional technical team and sales service team, if you have any question, please feel free to contact with us for support.

Category: Stone Making Plant

TAGCrushing and Screening Line , Ore crushing plant , Sand making plant

Cement Production Process

kefidchina | July 23rd, 2012

Cement is an important construction materials, it has widely used in construction industry and plays an important role for the social and economic development. According the application, cement can be divided into cement and special cement. General, cement according to the the main water rigid material name is divided into portland cement, aluminum acid salt cement, aluminum sulfur acid salt cement, iron and aluminum acid salt cement, fluorine aluminum acid salt cement, phosphate cement etc.

Cement production process

In the cement manufacturing process, limestone, sand, shale, clay, and iron ore are used as main raw materials. The whole cement process in clued four stage: raw material crushing, calcination, cement grinding, packaging and distribution.

Raw material crushing

After the mining, most important raw material have big particle size and higher hardness, in oder get higher efficiency, most of the raw material need to crush to suitable size. Customer need use jaw crusher and impact crusher to crush them to suitable size which can meet next stage. Some time, customer also have to use ball mill or vertical mill, in order to get more thin powder. The raw materials are ground to a size where the majority of the materials are less than 75 microns. Materials exiting the mill are called “slurry” and have flowability characteristics. This slurry is pumped to blending tanks and homogenized to insure the chemical composition of the slurry is correct. Following the homogenization process, the slurry is stored in tanks until required. In the dry process, each raw material is proportioned to meet a desired chemical composition and fed to either a rotating ball mill or vertical roller mill. The raw materials are dried with waste process gases and ground to a size where the majority of the materials are less than 75 microns. The kiln feed is pneumatically blended to insure the chemical composition of the kiln feed is well homogenized and then stored in silos until required.

Calcination

The equipment is mainly has calcination clinker shaft kiln and rotary kiln two kinds, shaft kiln applicable to the production of small factory, big and medium-sized factory appropriate USES rotary kiln.

Raw material are complete preheating and precalcining in the cyclone preheater, next procedure is into the rotary kiln in the firing of clinker. In rotary kiln, carbonate further quickly decomposes and start a series of solid reaction, then form the important material in cement clinker. As the material temperature close, mineral will become liquid, dissolved in the liquid phase reactions and form a (clinker). Clinker firing, temperature began to drop. Finally, cement clinker cooling machine will cool the rotary kiln of high temperature clinker to a temperature which downstream conveying, storage tanks and cement machine could bear. At the same time, recovery afterheat of the high temperature clinker, so as to improve the system of the thermal efficiency and quality of materials.

Cement regrinding

After calcination, the cement clinker need to regrind to final cement products. Fineness of the final products, amount of gypsum added, and the amount of process additions added are all varied to develop a desired performance in each of the final cement products.

Packaging and distribution

Each cement product is stored in an individual bulk silo. Then bulk cement can be distributed to customer site by truck, rail, or water.

Category: Grinding Plant Cases

TAGCement crusher , Cement Mill , Cement Production Process , Rotary kiln

Sand Washing Machine

kefidchina | July 20th, 2012

Sand Washing Machine is known as sand washer or washing equipment, it is mainly used for construction industry, sand processing, building work site and concrete dam, various sands classifying and dewatering. In the process, it is used to remove dirty sundry from the sand or stone, then can get the clean material. Kefid have two types of sand washing machine, Screw Sand Washing Machine and Wheel Sand Washing Machine, they have different application. The processing capacity of sand washing equipments are from 50 to 400 ton per hour.

Screw Sand Washing Machine

LSX Series Screw Sand Washing Machine adopts the novel seal structure, weir plate can be charged, the stable driven device, which ensures the best effect on the cleanout and dewatering. Kefid LSX series screw sand washing machines are widely used in the road construction, electric pole factory, concrete dam, the building and so on.

Technical Data :

Models	LSX-920	2LSX-920	LSX-1120	2LSX-1120
Diameter of screw (mm)	920	920	1120	1120
Length of tub (mm)	7585	7585	9750	9750
Feed Size (mm)	≤10	≤10	≤10	≤10
Capacity (t/h)	100	200	175	350
Speed of screw (r/min)	21	21	17	17
Electric Motor Power(kW)	11	2×11	18.5	2×18.5
Water Consumption (t/h)	10-80	20-160	20-150	40-300
Dimension (mm)(L×B×H)	8420×2180×3960	8420×3970×3960	10770×3950×4860	10770×5260×4860
Weight (t)	6.2	11.5	10.9	17.8

Wheel Sand Washing Machine

XSD Wheel Sand Washing Machine is fixed of 15 degree tilt, the triangular weir surrounds the bottom of the tank and forms a sedimentation tank, the screw head immerges into the tank, the motor drove by the reducer drives the screw head do consecutive motion, the clean water inflows the tank from the porous plate of the bottom. It owns the features of high cleanness, suitable structure, high capacity, low power consumption, and less sand loss in the washing procedure, especially its transmission device separated from the sand and water, which lengthens its usage life compared to the normal style and is the best choice for making a upgrade in the washing industry.

Technical Data :

Mm to inch conversion: 25.4millimeters=1 inch

Model	Wheel Size (mm)	Max feed size (mm)	Power (kW)	Weight (t)	Capacity (t/h)	Overall dimension (mm)
XSD2610	Φ2600×1000	10	5.5	2.7	20-50	3255×1982×2690
XSD2816	Φ2800×1600	10	11	3	30-60	3540×3000×2880
XSD3016	Φ3000×1600	10	15	3.3	50-100	3845×3000×3080

Category: Washing & Conveyor

TAGSand washing machine , Screw Sand Washer , washing equipment , Wheel Sand Washing Machine