80results about How to "Reduce coking cost" patented technology

The invention discloses a coking furnace capable of recycling heat energy, and the coking furnace comprises a furnace body, an exhaust gas recycling system and a raw coal gas treatment system, wherein the furnace body sequentially comprises a coal feeding segment, a rapid coal heating segment, a raw coal gas leading-out segment, a coal carbonization coking segment, a coke quenching and tempering segment, a dry coke quenching segment and a coke discharging segment from top to bottom; the exhaust gas recycling system comprises an exhaust gas leading-out unit, an exhaust gas heat exchanger, a commutator and the like; and the raw coal gas treatment system comprises a raw coal gas leading-out unit. By using the coking furnace disclosed by the invention, continuous coal carbonization coking canbe achieved and the exhaust gas after combustion is used for dry coke quenching in the furnace; pre-dried coal can be quickly heated to 300 DEG C during entering the furnace, the coal is carbonized and coked in the furnace body, and the exhaust gas generated by self-combustion is used for dry coke quenching at the furnace bottom after the exhaust gas is cooled by heat exchange with air, thus continuously producing coke; the pollution is less in the production process; the coal industrial chain is extended, the coking cost is lowered, the coking coal types are broadened, and the product quality is improved; the profit margins are expanded in a large extent; and the maintenance cost is low.

The present invention relates to coal blending and coking method for metallurgical coke, and especially the coal blending and coking method with thermal coal and weakly caking coal. The present invention adopts conventional coking process and the coal consists of weakly caking coal 0-15 wt%, thermal coal 0-10 wt%, gas coal 13-45 wt%, fatty coal 9-20 wt% and coking coal 40-45 wt%. The produced coke has dropping strength M40 of 77-78.5 %, abrasion resistance strength M10 <8.6 %, reactivity of 35-37 %, thermal state strength of 45-55 %, and granularity of 25-40 mm and 40-80 mm, and meets the requirement for iron smelting in blast furnace of 1000 cubic meter or larger. The present invention has expanded coal variety range for coking, and lowered coking cost.

The invention provides a new technology of thermal solution extraction of high-sulfur fertilizer coal and application thereof in coking coal blending. In the new technology, the high-sulfur fertilizer coal is continuously treated by thermal extraction in a fixed bed reactor or thermal solution extraction in a clearance type reaction still with an organic solvent under proper conditions, after thermal state filtering and separation, a high yield high-sulfur and low-ash thermal solution product is obtained, and the product is used for coking coal blending. By such thermal solution extraction, all the ash component and inorganic sulfur of the thermal solution product are removed, in comparison with the original high-sulfur fertilizer coal, the cohesiveness of the thermal solution product is improved, the sulfur content is reduced obviously, the sulfur is completely the organic sulfur, and the organic sulfur is easy to remove in the subsequent coking process. With the thermal solution product used in the coking coal blending process, the coke quality can be improved obviously, the sulfur content of the coke is lowered, or on the premise of guaranteeing the coke quality, the non-coking coals, such as the subbituminous coal, can be properly added, so that the coal blending coking cost can be lowered, and the coking coal source is stabilized and expanded.

The invention discloses a composite pulverized coal modifier, a modified coal prepared by using the composite pulverized coal modifier, and a preparation method of the modified coal. The pulverized coal modifier comprises the following components in percentage by mass: 0.1-10% of phenylacetic acid, 0.1-25% of borax, 0.1-30% of boron oxide, 30-50% of boric acid, 0.1-10% of calcium dodecyl benzene sulfonate, 0.1-15% of N-acyl glutamate, 0.1-10% of polyethylene powder, 0.1-20% of atactic polypropylene, 0.1-5% of sodium bentonite or/and calcium bentonite, and 0.1-15% of iron ore concentrates. The modified coal comprises the following components in percentage by mass: 0.01-3% of the composite pulverized coal modifier and 97-99.99% of non-coking coal. The preparation method of the modified coal comprises the following steps of: milling the composite pulverized coal modifier into a powder; crushing non-coking coal; placing the non-coking coal and the composite pulverized coal modifier in a reactor, and adequately mixing and reacting; controlling a temperature in the reactor to be 25-300 DEG C; and controlling the reaction time for more than 30 minutes. The composite pulverized coal modifier, the modified coal prepared by using the composite pulverized coal modifier, and the preparation method for the modified coal disclosed by the invention have the advantage that the mass ratio of the modified non-coking coal occupying coking blended coal is up to more than 70%, so that the resources of coking coal can be saved, and the coking cost can be greatly decreased.

The invention discloses a method for producing high-strength metallurgical coke by increasing the blending proportion of gas-fat coal and belongs to the technical field of coal blending for coking. According to the method, the high-strength metallurgical coke is produced through control on the volatile component index Vdaf, the caking index G, the maximum gelatin layer thickness Y and the distribution range of the vitrinite mean maximum reflectivity Rmax (0.8-1.5%). With the adoption of the method, the blending proportion of the gas-fat coal can be up to 18%, the coke thermal strength CSR is higher than 65%, and requirements of iron-making by blast furnaces larger than 2500 m<3> can be met.

The invention discloses a catalyzing cracking coking mother particle (material), which is characterized by the following: the mother particle (material) is composed of adhesive coking agent, catalyzing cracking catalyst, coke and non-coke coal, wherein the adhesive coking agent is self-waste plastic with resin, latex, industrial waste catalyst with iron and iron ore, which utilizes non-coke coal to produce regular coke with coking coal.

The invention discloses a heat storage and exchange device for a gas heater of a coal pyrolyzing furnace. The heat storage and exchange device comprises two sets of heat storage chambers, two sets of heat storage members, two sets of air inlet branch pipes and two sets of combustion waste gas discharging branch pipes; a first heat storage chamber is arranged in a furnace body outer wall, a first heat storage member is arranged in the first heat storage chamber, one end of the first heat storage chamber leads to the bottom of a first combustion chamber, and the other end of the first heat storage chamber is respectively connected with a first air inlet branch pipe and a first combustion waste gas discharging branch pipe; a second heat storage chamber is arranged in the furnace body outer wall, a second heat storage member is arranged in the second heat storage chamber, one end of the second heat storage chamber leads to the bottom of a second combustion chamber, and the other end of the second heat storage chamber is respectively connected with a second air inlet branch pipe and a second combustion waste gas discharging branch pipe; and combustion chamber through holes are arranged between the first combustion chamber and the second combustion chamber. According to the heat storage and exchange device for the gas heater of the coal pyrolyzing furnace, air entering the combustion chambers of the gas heater can be heated, the combustion efficiency of gases in the combustion chambers is improved, hot waste gases obtained after gas combustion in the combustion chambers can be used for heat storage, additional heat sources are not required, and coking costs are saved.

The invention provides a method of coal blending for coking by steam coal pretreatment, which comprises the following steps: putting lignite, long flame coal, weakly caking coal, and non-caking coal in a furnace, performing dry distillation at a temperature of 450-550 DEG C to reach a Vdaf of volatile components of 13-20%, putting the coal in a ball mill to obtain particles with a particle size of less than 1 mm to keep in reserve; well mixing the dry-distilled steam coal with coking coal with a weight ratio of 0.05-0.08:1, putting into the furnace for coking. The coking coal comprises 130 coking coal, 1890 gas-fat coal, Ningxia 1/3 coking coal, Liuhuanggou fat coal, dry-distilled semicoke, Baicheng mixed coal, Kuqa gas coal, and low-temperature dry-distilled 42# long flame coal, and has a coke strength M40 of 77.0-78.0. According to the method, steam coal with particles being less than 1 mm is used for coal blending for coking instead of gas coal, and coke strength M40 is increased by 0.4%.

The invention relates to a binding agent for coking and preparation method thereof. The binding agent is formed by synthesizing of formaldehyde, phenol, urea, coal tar, starch and the like, and the binding agent is a water-soluble organic resin binding agent for coking. During coking, 8% to 10% of the binding agent is added, a large amount of noncoking coal or weakly caking coal is used, qualified metallurgical coke can be refined, the coking cost can be reduced obviously, and the range of coal for coking is enlarged. The binding agent is suitable for conking tamping coke and formed coke, a glue mixing device is added, existing devices can be used, and no device is required to be added.

The invention discloses a method for preheating coal as fired by hot exhaust gas and regenerating active coke by hot exhaust gas. The method comprises the following steps that 1, hot exhaust gas obtained by combustion enters into an exhaust gas chamber from a hot exhaust gas feeding passage of a preheating device, then enters into an exhaust gas gathering annular passage by an exhaust gas preheating passage, and then is discharged from a main exhaust gas outlet of the exhaust gas gathering annular passage, wherein the hot exhaust gas obtained by combustion can transmit heat to the exhaust gas preheating passage and an inner wall in discharging, can heat air in a preheating chamber so that coal as fired falling into the preheating device is preheated, and simultaneously can be cooled after being discharged from the exhaust gas chamber; and 2, the cooled hot exhaust gas enters into an exhaust gas evaporation pipe net by a hot exhaust gas inlet pipe of an active coke regenerator; saturated active coke in a regenerator shell is heated and evaporated into unsaturated active coke by the exhaust gas evaporation pipe net; and then the cooled hot exhaust gas is discharged by a hot exhaust gas discharge pipe. The method provided by the invention realizes preheating of coal as fired and evaporation heating of active coke by hot exhaust gas obtained by combustion.

The invention is a method of producing section coke by traditional coke ovens, providing a method of producing section coke tar by existing mature traditional coke furnaces and rich high-volatility cherry-coals. First crushes char or carbonized materials of high-volatility cherry-coals, mixes in adhesive to form coke blanks, mixing the coke blanks with the high-volatility cherry-coals and puts them in a coke furnace for carbonization at high temperature, and finally leaving the furnace and extinguishing the coke and screening. It opens a new way of producing section coke by high-volatility cherry-coals in existing traditional coke furnaces, and can obtain the finished section coke and raw material for preparing coke blanks in primary carbonizing course.

The invention discloses an automatic control method for a thermal cycle continuous coal pyrolyzing furnace. The method is realized by the following steps: (1), an industrial control center controls the dehydration of coal as fired; (2), the industrial control center controls the feeding of the coal as fired; (3), the industrial control center regulates the preheating temperature of the coal as fired; (4), the industrial control center regulates the quantity of coal as fired and carries out temperature monitoring; (5), the industrial control center regulates and controls the coal pyrolysis heating; (6), the industrial control center evaluates the dry quenching process; (7), the industrial control center evaluates and regulates the coal pyrolysis process, the industrial control center controls the guiding speed and the guiding pressure of crude gas, and the coal pyrolysis carbonization process is controlled to a certain degree; (8), the industrial control center carries out comprehensive evaluation to the steps and makes the decision of discharging coke or not. The automatic control method realizes the control on the instruments and apparatuses for techniques of dehydration, coal feeding, preheating, carbonization, coke modification, dry quenching and crude gas guiding.

The invention discloses a comprehensive recycling device for coal pyrolysis gas. The comprehensive recycling device comprises a waste gas dehydrator, a preheating device, a coal pyrolyzing and carbonizing device, a coke modifying device, a dry quenching device, a crude gas guiding device, a crude gas condensing device, a dry-process active coke recycler, an active coke regenerator and a tubular heat exchanger. According to the invention, the guiding, purifying and recovering of crude gas and processes of combusting, dry quenching, coke modifying, preheating, dehydrating, active coke regenerating and the like of purified and recovered clean gas are connected into a whole in series, so that a complete process of guiding, recovering, purifying and recycling of the crude gas is realized, and the coking cost is lowered.

The invention discloses a dry quenched waste gas generating and coke modifying device, which comprises a dry quenching device and a coke modifying device, wherein the dry quenching device is arranged under a flame path arch and comprises a high-temperature coke quenching chamber, a low-temperature coke quenching chamber, a coke quenching bridge arch and a coke quenching waste gas fan; and the coke modifying device is positioned on the flame path arch in a furnace body, and comprises a coke modifying chamber formed at the lower part of a carbonization chamber, the lower part of a main internal flame path, and a lower-section auxiliary internal flame path, a central ring wall is surrounded to form the lower part of a high-temperature combustible waste gas inlet channel of a central channel, the lower part of the central ring wall is provided with a combustible waste gas inlet hole communicating the high-temperature combustible waste gas inlet channel with the main internal flame path and the lower-section auxiliary internal flame path, and the top of the high-temperature coke quenching chamber of the dry quenching chamber is communicated with the high-temperature combustible waste gas inlet channel of the coke modifying device. According to the device, combusted waste gas is firstly dry quenched to generate the high-temperature combustible waste gas, coke is modified by waste heat of the high-temperature combustible waste gas, additional energy-consuming devices are not needed, and the coking cost is reduced.

The invention provides a temperature adjusting method for treating coal cake collapse in a tamping coke oven and a coal charging dead corner in a top-charging coke oven. The method comprises the steps of adjusting coal gas amount entering an oven body in an early stage of coking time, and reducing coal gas supply amount; and recovering the coal gas supply amount in the tail stage of the coking time. The temperature adjusting method is simple and practical in operation, is little in cost investment, can effectively avoid high temperature accidents, coke firing and burning of an oven door, ensures coke quality, prolongs service life of the coke oven, reduces coking cost and improves stability of coke oven production.

The invention discloses a combustion chamber burner structure with a heating system and an operation method. The heating system is arranged on the machine side and/or the coke side of a coke oven combustion chamber, the heating system comprises a metal hollow plate, the metal hollow plate is arranged between inner-layer refractory bricks and outer-layer refractory bricks of a burner brickwork, theside, which is connected with the inner-layer refractory bricks, of the metal hollow plate is the same as the inner sides of the outer-layer refractory bricks, the side, which is connected with the outer-layer refractory bricks, of the metal hollow plate is the same as the outer sides of the inner-layer refractory bricks, a smoke inlet and a smoke outlet are formed below the metal hollow plate, the smoke inlet is connected with a chute below a middle vertical flame path through a smoke pipeline, and the smoke outlet is connected with a chute below the burner vertical flame path. The problem of low temperature of the vertical flame path of the combustion chamber burner of the coke oven is solved, and the coke quality of the burner is improved. The process is simple and convenient to operate and easy to implement, and resources are saved. The temperature of the coke cake in a carbonization chamber of the burner of the coke oven can be increased to 950-1050 DEG C, and the strength of thecoke after reaction is increased to 68.1% from 66.3%.