The crushing of ore is a process in which large ore or ore to be treated is crushed by overcoming the force between the inner parts with the help of external force, so that the particle size of ore is gradually reduced. In the concentrator, the crushing of ore is an essential material preparation stage before the separation operation. First of all, most of the ores processed by the concentrator are closely associated with gangue minerals, which are often fine-grained or even disseminated. Only by crushing and dissociating them, can they be enriched by the existing physical mineral processing methods. Secondly, all physical mineral processing methods are limited by the particle size. If the particle size is too coarse (useful minerals and gangues are not dissociated), or if the particle size is too fine (i.e. the over crushed is fine), they can not be effectively separated. In each link of concentrator, the basic task of ore crushing operation is to provide suitable materials for beneficiation operation. The quality of crushing process directly affects the technical and economic indicators of beneficiation.Factors affecting the production capacity of crusher:Hardness of material: The harder the material is, the more difficult it is to break. Moreover, the more serious the wear and tear of the equipment is. The speed of breaking is slow. Of course, the breaking capacity is small. This requires us to choose suitable materialsHumidity of material: That is, when the moisture content of the material is large, the material is easy to adhere in the crusher. It is also easy to block in the process of feeding and conveying, resulting in the reduction of crushing capacity. To solve this problem, first of all, the temperature of the material should be strictly controlled when selecting the material. If the temperature of the selected material is too high, the percentage of moisture in the material can be reduced by sunshine or air dryingFineness of material after crushing: The fineness requirement is high, that is, the finer the material is required to be crushed, the smaller the crushing capacity is. This depends on the specific requirements of the concentrator. If there is no special requirement, the fineness of the material is generally set to medium fineness.Material composition: Before crushing, the more fine powder contained in the material, the more the crushing will be affected. Because these fine powder are easy to adhere and affect the transportation, the material with more fine powder should be screened in advance. The fine powder should be screened out from the material as far as possible, so as not to affect the normal operation of the crusherViscosity of material: That is, the greater the viscosity of the material, the easier it is to adhere. The material with high viscosity will adhere to the inner wall of the crushing chamber in the crusher. If it can not be cleaned in time, it will seriously affect the working efficiency of the crusher. If it is serious, it will also affect the normal operation of the crusher. Therefore, when selecting the material, we must pay attention to that the viscosity of the material should not be too largeHardware device: The better the wear resistance of the crushing parts (hammer head and lining plate) of the crushing equipment, the greater the crushing capacity. If it is not wear-resistant, the crushing capacity will be affected. In this regard, the crushing parts of the crusher must be repaired regularly. If there is any damage or damage, it should be replaced in time, so as not to affect the normal work of the crusherToday, I would introduce four kinds of crushing equipment for you: jaw crusher, spring cone crusher, hammer crusher and counterattack crusher.Jaw CrusherOverview of principles:The periodic movement of the movable jaw around the fixed jaw, and the material located between the two jaw is squeezed to produce a crushing effect.Features:Deep cavity crushing ratio is large, cavity design is optimized, and high crushing efficiency;High speed of movable jaw and curved jaw plate design, and high production capacity.Range of use:Widely used in metallurgical mines, building materials, silicate and chemical industres. In the production of mineral processing industry, it is generally used for coarse and medium crushing of hard or medium hard ore.Spring Cone CrusherOverview of principles:The eccentric shaft sleeve is driven to rotate by the motor, and the movable eccentric cone and the fixed cone perform the swinging movement, thereby achieving the crushing purpose.Features:The moving cone is supported and suspended by spherical bearings;Water-proof and dust-proof device is adopted for long-lasting sealing.Range of use:Mainly used for medium and fine crushing of ore of various hardness.Hammer CrusherOverview of principles:It is mainly composed of parts such as frame, rotor, screen bar, hammer head and so on. The motor drives the rotor through the transmission belt, and the material is broken by the impact between the hammer and the material generated when the rotor rotates.Range of use:It is suitable for crushing materials such as coal, gypsum, alum, limestone, etc. Counterattack CrusherOverview of principles:Use impact energy to break materials. The rotor rotates at a high speed driven by the motor. The material entering from the feed port collides with the plate hammer on the rotor and is broken by the high-speed impact of the plate hammer. The crushed material is counterattacked on the lining plate and broken again and finally discharge granularity and material shape.Range of use:Metallurgy, mining, cement, chemical, refractories and ceramics and other industrial sectors, as well as highway construction, water conservancy engineering, construction crushed stones, machined sand processing and other fields.Our company can provide you with the above kinds of crushing equipment. If you have any demand for such equipment, you can send the parameters of material, hardness, feeding granularity, discharge size, processing capacity and voltage to us by email. We will try our best to provide you with satisfactory products.
Mongolia is one of the countries with the richest per capita mineral resources in the world. More than 80 kinds of minerals have been discovered, among which copper, coal, iron, gold, fluorite and other minerals have been mined and have a certain economic scale. For a long time, Mongolia has carried out the strategy of rejuvenating the country through mining industry. Mining industry has always been the pillar industry of Mongolia and an important engine of sustained economic growth. The whole mineral system has maintained Mongolia's economic development. At present, the mining industry accounts for about a quarter of Mongolia's GDP, which can be said to be the lifeblood of Mongolia's national economy.First, reserves and deposit conditions. The reserves of fluorite in Mongolia exceed 20 million tons, accounting for 8.75% of the world. The deposits are mainly concentrated in Kent, middle Gobi and East Gobi. Fluorite mine developers mainly include Mongolia Rost, Kevin, antair, Mongolia International minerals, Beifeng, Boston International and minkum resources. Mongolia Rost is the largest fluorite developer in Mongolia. It is a joint venture between Mongolia and Russia. Second, the production situation. According to statistics, the output of fluorite in Mongolia has been increasing for many years. In 2020, the output of fluorite in Mongolia will be about 720000 tons, accounting for 10.29% of the global output in 2020. Third, China imports from Mongolia. Mongolia is one of the main sources of fluorite in China, and its import is mainly fluorite ore. By 2020, China will import 512300 tons from Mongolia, accounting for 65.84%, and 61046291 US dollars.As an important neighbor of northern China, Mongolia has a large number of mineral resources flowing into China, and a large number of national production and living materials flowing back to Mongolia. In the trade between countries, many Chinese people go back and forth from the original traders to cooperative manufacturers.
According to different mining sieving purposes, sieving operations can be divided into the following categories:1. Preparation sieving: its purpose is to prepare for the next operation. For example, before jigging, gravity concentration plant should sieve and classify the materials, and classify the products of different sizes. 2. Selective sieving: if the distribution of useful components in each particle size is very different, different quality particle size can be obtained by sieving equipment, and the low quality particle size can be sieved out, so as to improve the grade of the material.3. Independent sieving: its purpose is to get the final product suitable for the user's requirements. For example, in the ferrous metallurgy industry, the iron rich ores with high iron content are often sieved into different sizes. The qualified large iron ores are put into the blast furnace for smelting, and the fine ores are put into the furnace through pellet or sintering.4. Auxiliary sieving: this kind of sieving is mainly used in crushing operation of concentrator, which plays an auxiliary role in crushing operation. Generally there are two kinds of sieving and pre sieving. 4.1 inspection and sieving refers to the sieving of ore after crushing. Its purpose is to ensure that the final crushing products meet the particle size requirements of grinding operation, and make unqualified crushing products return to crushing operation, such as sieving in front of medium and fine crushing machine, which not only plays the role of pre sieving, but also plays the role of inspection and sieving. Therefore, inspection and sieving can improve the utilization of crushing equipment, which is similar to the closed-circuit circulation of classifier and grinder, and can improve the grinding efficiency. 4.2 pre sieving refers to the sieving before the ore enters the crusher, and the part that is qualified for the crusher is separated from the ore by the sieve, such as the grid sieve and sieving installed in front of the coarse crusher, and the products under the sieve. In this way, the amount of ore entering the crusher can be reduced, and the output of the crusher can be increased.5. Dewatering sieving: the main purpose of this kind of sieving is to remove the moisture of materials, which is generally used in coal preparation plant and tailings dry discharge.Here are some factors that affects the mining sieving process.First: physical properties of materials, including particle size composition, humidity, mud content and particle shape.Second: motion characteristics and structural parameters of sieve surface, including motion characteristics of it, length and width of it, size and shape of its hole, etc.Finally: Operating conditions, including the size of productivity and uniformity of ore feeding.Among the three factors mentioned above, the first one can not be changed at will except humidity. The second kind of factors must be considered carefully when designing the sieve. Only the third kind of factors can be adjusted in the actual production process.
Use: Permanent magnetism tube-shaped type magnetic separator apply to wet separate fine particles ferromagnetism mineral.Materials belong to this kind include magnetite, magnetic pyrite or roasted magnetized hematite, limonite, siderite and so on.Working Principle:Pulp fed into separator tank through mine supply box and get into mine supply zone assume a loose state.When passing by magnetic field, some ferromagnetism mine tablets absorbed on the surface of the cylinder by the effect of magnetic forces.When the cylinder rotating, magnetic particles turning over in chain because of the magnetism lined along circuit alternately.A portion of gangue mixed in magnetic mineral have been cleared away.Magnetic particle rotating with cylinder and be brought out of magnetic field, rush with wash water in concentrate groove.Weak magnetic and non-magnetic mineral (gangue) had been swung away, and discharged from tailing groove under the role of pulp, finally achieve grading process.
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