Method of briquetting coal
The invention relates to the field of briquetting of minerals, in particular to the technology of briquetting coal and anthracite coal, and can be used in the coal mining and coal processing industry. Way to lead by pressing coal sludge clarifiers mines and coal processing plants, in which the resulting briquettes are sent to drying and subsequent cooling, after which the outer surface of the briquettes cause the protective coating to protect them from the harmful effects of the environment. The invention solves the problem of disposal of fine coal slurries class 0-1,0 mm accumulated in the sumps mines and coal processing plants, to simplify and cheapen the technology of briquetting coal without binding and to improve the environmental situation in the coal mining regions. 3 C.p. f-crystals, 1 Il., 1 PL.The invention relates to the field of briquetting of minerals, in particular to the technology of briquetting coal and anthracite coal, and can be used in the coal mining and coal processing industry.Known methods of briquetting coal and antratsitovsky (bitumen, coal tar pitch, sulfate distillery stillage, solid clay, cement), compressing the mixture pressure of 20-50 MPa, and subsequent cooling (see A. he was So “briquetting of minerals”, M: “Nedra”, 1989, S. 86, 92, 98, 101, 106).The above methods have the following disadvantages.First, the need to use the binder greatly complicates and increases the cost of the process of briquetting coal, because it determines the operations deep dewatering and thermal drying of raw coal to the minimum values for humidity, i.e., up to 2-3%.Secondly, the need for thorough mixing of coal with a binder associated with the use of additional equipment, namely: malaxer and various metering devices.Thirdly, the existing technology of briquetting coals and anthracites are not intended for use as a feedstock fine coal slurries class 0-1,0 mm from the mining and processing discharged into the lagoons of these enterprises, worsening ecological environment in mining areas.The proposed solution is aimed at solving problems for disposal encoding volumes on the simplification and cheapening the technology of briquetting without binder and to improve the environmental situation in the coal mining regions.The task is solved in that the extrusion is subjected to coal sludge clarifiers mines and coal processing plants, and the resulting briquettes are sent to drying and subsequent cooling, after which the outer surface of the briquettes cause the protective coating to protect them from the harmful effects of the environment.Indeed, pressing coal slurries class 0-1,0 mm clarifiers mines and coal preparation plants containing clay and silt particles class 0-0,05 mm, without using a binder makes it possible to greatly simplify the technology of manufacturing briquettes, to lower their costs and to address the issues of improvement of ecological situation in the coal mining regions.As an example, here is the characteristic parameters of coal slurries class 0-1,0 mm Central coal preparation plants “Abashevskaya” ,Novokuznetsk testing flotation waste in August 1997,The table shows that the highest ash content have classes 0-0,05 mm and 0.05-0.1 mm, are clay and silt tone is investing. Performed research and experiments confirmed the industrial feasibility of the proposed method of disposal of sludge waste mines and coal preparation plants.The comparison of the proposed technical solutions to the prototype allows us to conclude that it is significantly different from the prior art and the technology of briquetting coal introduction of new essential features listed above and meets the criteria of novelty, inventive step and is industrially applicable.The proposed solution is illustrated in the drawing, where a flow diagram of the operation of the technology of briquetting coal sludge from septic tanks mines and coal preparation plants.This method of briquetting coal sludge is implemented as follows.From pits mines and coal preparation plants coal sludge class 0-1,0 mm benefit scoop excavator (not shown) and discharged to the drainage area and accumulate in the form of a conical piles, in which the discharge of excessive moisture, bringing humidity slurry product to 12-20%.Next, the slurry trucks delivered directly to the place of his brication the amount converters in a hopper 1 (see the drawing), from which the sludge in a certain way poured into molds of the press 2 and the working body affect portions of the slurry pressure 30-80 MPa for 5-15 seconds, resulting in the formation of the briquettes some form, however, a greater pressure corresponds less time pressing. Prepared batch of briquettes is directed into the drying chamber 3, in which it dwells within one-half hours at a temperature of 120-180C. In the heat treatment of the clay and silt particles class 0-0,05 mm “are cemented and dried briquettes acquire sufficient mechanical strength for their transportability by any means of transport.From the drying chamber briquettes are sent to the zone 4 and the exercise of their cooling to 20-25With, followed by in the shop 5 laminating the external surface of the bricks to prevent them from cracking and breaking under the influence of precipitation.
Claims1. Method of briquetting coal, including drying, pressing and cooling, characterized in that the extrusion is subjected to coal sludge clarifiers coal mines and pleebo the following which at the outer surface of the briquettes cause the protective coating to protect them from the harmful effects of the environment.2. The method according to p. 1, characterized in that the pressing send fine coal slurry humidity 12-20%, and the pressing is performed with the pressure of 30-80 MPa, within 5-15, depending on the pressure.3. The method according to p. 1, characterized in that the drying of the pellets is carried out at a temperature of 120-180C for 1-1,5 hours4. The method according to p. 1, wherein after cooling the briquettes their external surface is subjected to lamination.
SUBSTANCE: invention relates to method and system for briquetting powder materials, for instance, moisture-containing, bituminous and semi-bituminous coals, without using binding agent. Method (versions) includes stages, at which powder material, probably, is partly dried, and supplied into briquetting device in conditions, when condensed gas is introduced into briquetting device at the time of supply or in conditions, when water vapour is released from powder material during supply. Briquettes are formed in briquetting section of briquetting device, where briquettes are formed from powder material in conditions that lead to condensation of gas component, reducing in that way, pressure growth during briquette formation. Invention also includes system (versions) for briquetting powder materials according to two methods stated above.
EFFECT: reduction of gas inrush during formation of coal dust into briquette.
52 cl, 1 tbl, 4 dwg
SUBSTANCE: invention relates to the field of production of hard fuel of organic origin, namely, to formation of agglomerated fuel from wastes of carbon-containing materials. The method includes mechanical action on raw material with gradual increase in loading and its volume compression. During mechanical action raw material is grinded until viscous-plastic state is obtained. The device includes loading bin, cylinder-cone frame, auger shaft with transporting and pressing blades and has longitudinal protrusions located along the frame on its inner surface and a row of dies, each of being fixed in the frame at a distance from each other, with an auger shaft passed through the central holes of the latter.
EFFECT: increase in degree of fuel plasticity and strength whatever the original raw material without any hardening agents and additives and higher productivity of device.
2 cl, 1 tbl, 2 dwg
FIELD: technological processes; metallurgy.
SUBSTANCE: invention may be used for recycling of chemical-recovery production wastes. Coal sludges are loaded in molds 1 of transporter 2 and supplied to furnace 3, where they are thermally treated. Briquetting is done without binding agent, and thermal treatment is carried out at the temperature of 330-390 °C for 120-40 minutes.
EFFECT: reduction of prime cost and increase of briquettes mechanical strength.
1 tbl, 1 dwg
FIELD: power engineering.
SUBSTANCE: invention relates to the method of recycling solid domestic wastes (SDW) into fuel for furnaces of high-temperature synthesis of a cement clinker, including sorting of initial SDW so that at first such incombustible fractions such as batteries, stones, fragments of glass and faience, then secondary materials are extracted, including ferrous and non-ferrous metals. The remaining mass is previously ground to the fraction of 50-100 mm, dried to humidity of 5-10%, and then ground to the fraction of 8-10 mm. The ground raw materials are heated to 160-200°C and exposed to thermoplastic extrusion to produce fuel pellets.
EFFECT: method makes it possible to increase physical and mechanical strength of RDF fuel, to eliminate water absorption due to capsulation of granules in process of their manufacturing, to prevent possibility of rotting and self-ignition, to reduce costs during storage and transportation, to reduce energy intensity of its production, to improve environment, also to reduce volume of SDW removed to SDW landfills, to eliminate capital costs for construction of plants for wastes management in connection with usage of equipment of existing cement production facilities.
1 cl, 4 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to the method for obtaining briquetted solid fuel, which can reduce the cost of briquetting at maintaining the strength of briquetted product. Mixed oil that contains heavy oil and oil-solvent, and porous coal having moisture content of 30 to 70 wt %, is mixed so that a suspension is obtained. Suspension is dehydrated by heating so that dehydrated suspension is obtained. Oil-solvent is extracted from dehydrated suspension so that the residue is obtained. The residue is heated, and oil-solvent is extracted in addition from the residue so that modified coal is obtained. Moisture is introduced to modified coal so that wet modified coal with moisture content of 3-10 wt % is obtained. At the stage of moisture introduction, crushed porous coal with moisture content of 30 to 70 wt % is mixed with modified coal. Then, wet modified coal is briquetted under pressure.
EFFECT: reduction of briquetting cost at maintaining the briquette strength.
2 cl, 3 dwg, 1 tbl, 1 ex
FIELD: power engineering.
SUBSTANCE: invention relates to usage of an extrusion-type briquette (BREX) produced by the method of stiff vacuum extrusion, including coal dressing wastes and, if required, coal siftings, a mineral binder and a concrete stone, as fuel for industrial furnaces and domestic ovens. BREX briquettes are characterised by the fact that size of materials included into a mixture for production of briquettes does not exceed 5 mm.
EFFECT: application of stiff vacuum extrusion makes it possible to produce BREX briquettes with sufficient strength and optimal dimensions for solid fuel, with minimum consumption of a binder.
FIELD: wood working industry.
SUBSTANCE: invention relates to a method of deep processing of wood sawdust and leaves without chemical cementing components, characterized by that they are sieved for removal of large-size elements, loaded into a dryer for decrease of humidity down to 10%, crushed until obtaining of a mix of particles with the size less than 15 mm and the volume no more than 0.5-1.0 cm3, formed, pressed at the pressure 120-140 kg/cm2 and the temperature 250-350°C without air access. The invention describes also the briquette obtained by the named method.
EFFECT: obtaining robust briquettes from wood sawdust and leaves, without using the chemical cementing components.
5 cl, 8 ex
SUBSTANCE: invention relates to method implementations for forming gas hydrate granules in apparatus for forming gas hydrate, which includes generator, whereto initial gaseous material and water are fed, and enabled to ensure reaction of starting gaseous material with water at high pressure in order to produce gas hydrate suspension, and to remove water from gas hydrate suspension, which is performed in order to form gas hydrate suspension into gas hydrate granules of required size. At that said method includes following steps on which in one version, gas hydrate suspension is fed cylindrical compression chamber equipped with compression plunger able to move to and fro in cylindrical compression chamber in axial direction of compression chamber, and compression plunger is moved for applying compression for extrusion of water from gas hydrate suspension and forming gas hydrate granules; speed of compression plunger is minimised while water is forced out from gas hydrate suspension so that connection between gas hydrate particles strengthens and formed gas hydrate granules have high shear resistance.
EFFECT: produced gas hydrate granules have high shear resistance, which is convenient for handling during transportation and storage.
2 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: manufacture method of the briquetted solid fuel includes the following steps: spraying of the low quality coal to produce the pulverized low quality coal; mixing with the oil solvent to form the dewatered suspension; heating and thereby dewatering of the suspension to form the dewatered suspension; separation of the oil solvent from the dewatered suspension by liquid-solid body separation to obtain the cake; heating and thereby drying the cake, so to separate additionally the oil solvent from the cake and to obtain the refined coal in the powder form; mixing of the refined coal with the coal to control the properties in the powder form, in order to control the properties of the refined coal and thereby to obtain the feedstock for briquetting, containing the coal to adjust the properties in the amount from 5 to 70% wt %, based on the total weight of the briquetted feedstock, the mentioned carbon to control the properties, having the free bulk density 0.6 kg/l or more and the natural repose angle of 40° or less, and the feedstock briquetting for the briquetting under the pressure to produce the briquetted solid fuel in the form of briquettes.
EFFECT: production of briquetted solid fuel from low-quality coal with high strength.
4 cl, 1 dwg, 9 ex, 2 tbl
SUBSTANCE: invention describes a method for producing moulded solid fuel, comprising: a pulverization stage for pulverizing low-grade coal; a stirring stage for mixing the pulverized low-grade coal and the oil solvent to form a slurry; a dewatering stage for heating and dewatering the slurry to form an anhydrous slurry; a stage for separating solid and liquid phases to separate the oil solvent from the dehydrated slurry to form a precipitate; a drying stage for heating the precipitate to further separate the oil solvent from the precipitate to produce powdered coal of enhanced quality; and a moulding stage for compression moulding the powdered coal of improved quality by means of a moulding device without adding and/or mixing with a bonding material, in which at the stage of forming the moulding device on the surface, a cooling substance is pulverized to cool the surface and thus the surface temperature of the moulding device is maintained at 100°C or below.
EFFECT: producing moulded solid fuel from low-grade coal, having high strength.
6 cl, 4 ex, 1 tbl, 2 dwg