Preparation of coal - the process by which the mined coal becomes subject to sale of the net product of a stable size and quality, which are specified by the customer.

　　Ending the use of coal refers to the following General categories:

　　1. Reception of the electric power: Coal is burned to provide heat, which leads to the movement of the turbine, generating electricity.

　　2. Production of iron and steel: Coal is heated in kilns without access of air to remove gas (volatile material) and to produce coke. Coke used in blast furnaces for smelting of metal. Coal can also be made directly to the blast furnace, by making spray coal.

　　3. In the industry: Coal used in the steel industry as a reducing agent: contained in this carbon is used to remove oxygen (recovery) in the metallurgical process.

　　4. Heating: Coal can be used in residential buildings and in industry as a fuel for space heating. It is also used as fuel in dry kilns for cement production.

　　Crushing and Breaking

　　The coal produced from the mine, must be fragmented to an acceptable final size for use in the preparation plant.

　　Typical devices crushing and breaking are:

　　1. Crusher with feed mechanism:

　　Drum rotation is equipped with sharp details, which are crushed coal. Coal is supplied скребковым the conveyor belt, and the drum rotates in the same direction as the flow of coal. Crusher with feed mechanism are usually used under the ground, but some are applied on the surface in the preparation cycle of coal.

　　2. Rotary crushers:

　　Scheme crusher consists of the foreign fixed-line shell with an inner drum rotation, equipped with дырчатыми sheets. Typical frequency of rotation of the drum - 12-18 revolutions per minute. Sheets lift pick up the raw coal, which then falls across the diameter of the drum. More soft coal breaks down and goes through the hole, then as a solid rock is transported to the exit. Rotary crusher has two functions: a decrease of the size and enrichment by deleting rock.

　　3. Roller crushers:

　　Roller crushers can consist of either one of the rotating screens and stationary anvil (plates), either of two screens, rotating at the same speed towards each other. The surface of the screens usually jagged or corrugated. The General form of crushers - this is a two-stage or Quad roller crusher, where the product of the first double roll crusher gets to the second set of double roll crusher through the smaller the hole, so that in the end in a single machine can be achieved large-scale decrease in size. A typical work - reducing the size of the raw material up to 50 mm.

　　Fragmentation is sometimes used after the purification process of coal, as coal large size further finishing up to the size required by the market. Are commonly used roller crushers or hammer mills. Hammer mill consists of a set of freely swinging hammers, rotating on an axis, which break the coal and throw it on a flat plate.

　　Selection according to the size of the

　　Coal is sorted by size before and after the enrichment process (purification). For coal of different sizes are different processes of purification, so that the raw coal at receipt on a plant for the preparation of coal with the help of the Sith would be distributed on three or four classes of size, each of which then passes through the treatment process. The process of screening is usually rectangular vibrating screens with the network or the plate with the holes. If the size is less than 6 mm is used the wet sieving, to increase the effectiveness of the operation of selection according to size, and with dimensions of less than 0.5 mm static curved sieving sieve (knee) is placed in front of the vibrating screen to improve efficiency.

　　Following the process of enrichment of clean coal sometimes sorted by size by sifting on a number of options to sell for industrial and household purposes. Selection for the clean coal are rarely carried out in the case of coal, walking for electric power generation (steam coal) or for the production of metal (metallurgical coal).

　　Your Reliable Supplier of liming heavy industry

　　Machine-building company liming heavy industry  manufactures equipment for preparing coal, as well as the list entails the technological project of the plant under the key for the preparation of coal a capacity of 40 tons/hour, up to 2 000 tonnes/hour.

　　The equipment of our company by its technical characteristics and reliability will not yield to the leading European brands, and the cost will be much cheaper.

　　Each client is offered range of services:

　　1. The design of the cement plant.

　　2. Manufacture of the equipment for the production of cement.

　　3. The chief-installation of a cement plant construction.

　　4. The launch of the plant in operation.

　　5. After-sales service.