120results about How to "High fixed carbon content" patented technology

The disclosed preparation method for charcoal comprising: crushing the solid waste from extracted traditional drug or plant to extrude into bar-form; loading the product into retort for charring reaction with three stages for 10-30min at 120Deg, 200-400min at 120-350Deg and 100-300min at 350-450Deg, respectively. Wherein, firing the exhaust gas in combustion chamber to provide heat source. This invention has yield rate as 40-55% with low energy consumption and little pollution.

The invention provides a method for biomass carbonization instead of pulverized coal injection in a blast furnace. Dried straw and other biomass raw materials are extruded to obtain a machine-made rod, and the machine-made rod is carbonized by a carbonization furnace to obtain carbon powder at a temperature of 300 to 1000 DEG C. The carbon powder obtained by the furnace is mixed with pulverized coal and injected into the blast furnace to greatly reduce a coal ratio and flux usage amount and improve production efficiency; latent heat of flue gas is fully utilized to reduce emission of exhaust gas; the exhaust gas discharged from a combustion chamber is filtered and discharged into air through a microporous ceramic tube. Biomass resources and sensible heat of the flue gas, and oxygen and carbon monoxide in the flue gas are used in ironmaking production. In addition, the biomass resources can also be used as a substitute for the pulverized coal or coke powder used in iron ore sintering machines. The method comprehensively utilizes existing equipment to treat waste materials such as biomass raw materials and the flue gas, saves coking coal resources, fully exerts potential advantages of biomass energy, protects environment, and reduces costs.

The invention discloses a combined carbonaceous reducing agent for smelting metal silicon and a preparation method thereof. The combined carbonaceous reducing agent comprises refined pulverized coal and petroleum coke powder, wherein the refined pulverized coal accounts for 70-80% of the total weight; the refined pulverized coal is prepared from the raw material soft coal by oil agglomeration selective flocculation de-ashing treatment; the refined pulverized coal contains 75-80% of fixed carbon, 3.5-4.5% of ash content and 16-21% of volatile content by weight; and 2-3% of binder is added into the mixture of the refined pulverized coal and the petroleum coke powder, and then a combined carbonaceous reducing agent pellet is prepared by cold press molding briquetting and drying treatment. According to the invention, the ash content and impurities in the soft coal are removed by a flotation method, the petroleum coke powder serves as supplement of the fixed carbon, and the two are combined to obtain a combined carbonaceous reducing agent with high content of fixed carbon, low ash content and low content of impurities. Through the invention, the problem that the reducing effect is unsatisfactory by using the soft coal only is solved, the smelting efficiency and the product quality are improved, and the added value of the soft coal is increased.

The invention discloses a method for pressing semicoke powder used for producing calcium carbide, which comprise: mixing 82 to 91 weight percent of semicoke powder, 7 to 9 weight percent of additive and 2 to11 weight percent of binder, adding the mixture into a stirrer to stir the mixture at room temperature for 2 to 5 minutes, processing and forming the mixture, drying the formed product to obtained the finished product, wherein the additive is rich coal; the binder for forming the semicoke powder is prepared by mixing 20 to 30 weight percent of solution of sodium hydroxide, 20 to 30 weight percent of solution of urea and 40 to 60 weight percent of corn starch and by adding hot water at 60 to 80 DEG C during mixing; and the concentration of the solution of sodium hydroxide is 0.1 to 5 percent and the concentration of the solution of urea is 0.1 to 5 percent. The product of the invention has high cold strength, can be fed in a furnace in batch in place of semicoke, avoids the yield and quality of smelted calcium carbide, reduces the production cost of the calcium carbide, improves resources utilization rate and has high use and promotion values.

The invention relates to the technical field of microcrystalline graphite purification, and discloses a process for preparing high-purity microcrystalline graphite with low energy consumption and in alarge scale, and the high-purity microcrystalline graphite. According to the process, microcrystalline graphite raw ore is firstly crushed and ground, and flotation including one time of roughing, four times of cleaning and one time of scavenging is performed in match to increase the purity of the raw ore to the utmost through a physical method; an improved acid leaching purification method is adopted, the alkali leaching efficiency is increased, energy consumption is reduced, and the graphite recovery yield is increased; and finally a high-temperature purification method adopting a step-by-step heating manner is utilized to further reduce energy consumption for graphite purification, and the high-purity microcrystalline graphite the fixed carbon content of which is 99.993% or above can be finally obtained. The process overcomes a problem that microcrystalline graphite in the prior art is not high in purity, high in energy consumption and high in cost. Through improvements on the prior art, the process achieves an objective of reducing energy consumption and the cost, and achieves industrial production.

The invention relates to a reducing agent used for producing industrial silicon, which has the advantages of being high in fixed carbon content, less in dosage, low in cost, good in reaction activity and capable of completely replacing wood charcoal to serve as the base or the main reducing agent of the industrial silicon. The reducing agent comprises the following agent by weight: 30 to 50 parts of washed coal, 20 to 30 parts of high-purity carbon powder and 30 to 40 parts of petroleum coke, wherein the washed coal comprises less than 8% of ash and more than 65% of fixed carbon by mass, the high-purity carbon powder comprises less than 8% of ash and more than 80% of fixed carbon by mass, and the petroleum coke comprises less than 5% of ash and more than 90% of fixed carbon by mass. A preparation method of the reducing agent is further disclosed and includes the following steps 1) mixing the washed coal, the high-purity carbon powder and petroleum coke according to the proportion and crushing the mixture to less than 200 meshes; 2) adding adhesive into the mixture evenly in stirring mode and conducting pelleting and drying; and 3) conducting screening to obtain a bonding product with the granularity as 10mm-30mm.

The invention provides a preparation method of a biomass charcoal composite fuel for blast furnace injection, which comprises the following steps: mixing crushed biomass raw materials and low metamorphic coal, carrying out hydrothermal carbonization treatment, then mixing with preheated high metamorphic coal, carrying out heat preservation, and finally carrying out hot pressing treatment. According to the method, the yield of biomass hydrothermal carbonization is increased by utilizing mineral substances in the low-rank coal, and meanwhile, ash, volatile components and water in the low-rank coal can be partially removed, so that the caking property is improved. And then the mixture is mixed with the preheated high-metamorphic coal, so that the ignition point of the mixture can be improved, the explosiveness of the mixture is reduced, and the ash fusion point of the composite fuel can be further improved by utilizing the characteristic of high ash fusion point of the high-metamorphic coal. The biomass charcoal composite fuel can completely replace fossil fuel to be used for blast furnace injection, the emission amount of carbon dioxide and pollutants in the ironmaking production process is reduced, and in addition, the fuel formed through hot pressing has the advantages of being large in volume density and high in compressive strength and is suitable for long-distance transportation and long-term storage.

The invention relates to uniform ultra-microporous activated carbon for gas separation and a preparation method of the uniform ultra-microporous activated carbon. According to the technical scheme of the preparation method, mixing semi-coke with KOH in a mass ratio being 1: (0.01-0.2), adding water and an activating aid to impregnate the mixture for 1-36 h; increasing the temperature to 800-950 DEG C in a programmed manner under N2 protection, controlling thermal decomposition, and introducing water for activation of part of steam for 0.5h-1.5h; finally, washing the mixture with acid and water until the mixture is neutral to obtain the uniform ultra-microporous activated carbon. The pore size is distributed centrally between 0.45 and 0.55 nm, the pores belong to ultra-micropores and have microporosity of 70% or more, and the adsorption capacity of hydrogen is 77cm<3>/g or higher. The semi-coke is taken as a raw material, low in price and low in energy consumption and needs not to be carbonized; an activation method integrates KOH impregnation pretreatment and activation of part of steam, little KOH is consumed, and the activation method has the characteristics of being low in cost and pollution, helpful for reducing corrosion of equipment and the like. The activated carbon prepared with the method has the characteristics of uniform pore size distribution, extremely rich ultra-microporous structure and the like, and can be used in gas separation fields such as pressure swing adsorption hydrogen making or hydrogen storage and the like.

The invention discloses a method and a device for preparing hydrogen-enriched fuel gas through sawdust charcoal gasification by high-temperature water vapor. Sawdust charcoal is used as a raw material, and water vapor is used as a gasification medium, so as to prepare the hydrogen-enriched fuel gas. The method mainly comprises the following steps: helical feeding of sawdust charcoal, generation of water vapor, gasification of sawdust charcoal and cooling of hydrogen-enriched fuel gas. The water vapor is supplied by a water vapor generator in the early stage; after the system is stabilized, the water vapor is supplied by a waste heat recycling device; the temperature of a reactor is 800 to 950 DEG C; and the hydrogen-enriched fuel gas is prepared under technological conditions of proper reaction temperature, flow of the water vapor, particle size of the raw material, reaction time and the like. According to the method, the hydrogen-enriched fuel gas with the hydrogen volume percentage of 61.2 to 65.8 percent and the maximum hydrogen yield of 113.5 mmol/g can be prepared. The method has the advantages that the hydrogen volume percentage of the fuel gas is high, no tar is generated, and the gasification device is simple in structure; and the hydrogen-enriched fuel gas can be applied to preparation of high-purity hydrogen, synthesized natural gas, liquid fuel including methyl alcohol and dimethyl ether, and the like.

The invention discloses a preparation method for formed coke and a piece of equipment, in particular to a method of using coke powder or anthracite, mill coal as primary material, adding powder normal temperature adhesive and coal tar powder, fully mixing, cold molding and performing, putting the coke adobe into a tunnel carbonization stove, giving a low temperature oxidation treatment to the coke adobe, to produce formed coke with a high quality. The forming equipment is over 24 times more efficient than the existing equipment by using multicavity composite mold and automatic feeding-ejection apparatus; the material needs no processing of drying and heat plasticizing; the elementary composition of the body can be adjusted freely; the formed coke has low sulfur content, low ash content, high fixed carbon content, no smoke in the combustion, high iron-coke ratio and good watertightness in the long time preservation. The investment scale with the same production capacity is only one twentieth of the heat seal - carbonization method; the working procedures of material drying, heat kneading, high temperature carbonization are saved, not only the production control becomes easy, but also the production process is more energy-saving; the tunnel type oxidation (or carbonization) stove realizes a continuous operation, has a large yield, and improves the productivity.

The invention discloses a high-temperature casting coal and a production method for the coal. The product from the invention comprises 50-90% fine anthraciferous coal, 1-12% coke coal, 5-25% peacoke, 1-10% binder and 0.1-1% active agent. The production method of the invention comprises selecting material, blending materials, crushing, mixing and agitating, forming, carbonizing and getting finished product. The invention can reduce about 10% ash, so that the fixed carbon content of the product can be increased greatly, and the product is of very good water proofness and cold and hot strength, is easy to store and transport; meanwhile, a lot of microholes are produced during the carbonizing, this is good for active reaction during casting and production of chemical fertilizer plant, is both useful for gas making and casting, and can save about 50% coke.

The invention discloses an environment-friendly industrial briquette composite binder and a preparation method thereof. Humic acid, alumina, common seepweed herb seed cake meal, water and the like are used as raw materials; the preparation process is simple and convenient; the briquette prepared by the method has the advantages of little drop of the solid carbon content, good binding property, high pelletizing rate, high cold/hot strength, good thermal stability, low cost, short production cycle and the like.

The invention relates to a method for preparing high-performance compound machine-made charcoal, and belongs to the technical field of resource comprehensive utilization. The method comprises the following steps: respectively grinding a biomass raw material with a moisture content of lower than 5 percent and lignite into particles having granularity of less than 1cm; pyrolyzing the biomass raw material particles to obtain charcoal; uniformly mixing charcoal, lignite, an adhesive, a combustion improver and water to obtain a mixed material, and pressing the mixed material into charcoal rods with center holes; and heating the charcoal rods with center holes to 400-700 DEG C at a heating speed of 30-200 DEG C/min, carbonizing for 1-12 hours, and cooling to obtain the compound machine-made charcoal. The preparation process adopts biomass which is rich in source and low in price, is regenerative and can be easily ground and lignite with low price as carbon sources, has the potentials of low large-scale production price, high yield, high heat value and high porosity, and is well accepted by the market.

The invention relates to a treatment method for dehydrating and upgrading high-moisture and high-volatile low-rank coal, and discloses a method for preparing blast furnace blowing semicoke by upgrading low-rank coal based on a high-pressure hydrothermal reaction, wherein the method comprises four steps of low-rank coal pretreatment, high-pressure hydrothermal upgrading, waste heat recycling and upgraded semicoke dehydration and drying. According to the method, low-heat-value low-rank coal is converted into high-quality blast furnace blowing upgrading semicoke by utilizing a high-pressure hydrothermal reaction upgrading technology, wherein the moisture content of the semicoke air drying base is less than 6%, the volatile component content is less than 25%, the Hardgrove grind ability indexis greater than 60, the high-order heat generation value is greater than 24000 kJ/kg, soluble potassium salt, sodium salt and sulfate components in ash are dissolved out, the organic sulfur in coal iseffectively separated out, and the upgraded semicoke can meet the performance index requirements of coal for blast furnace blowing; and the method provided by the invention effectively solves the problems of high water content, high volatile component content, low heat value and high harmful element content of blast furnace blowing of low-rank coal, and provides a clean, efficient, low-energy-consumption and high-added-value low-rank coal upgrading utilization method.