40results about How to "Realization of high value-added utilization" patented technology

The invention discloses a technology for producing metallized furnace charge from iron-containing dust and high-silicon iron concentrate. The technology comprises the following steps of mixing blast furnace gas plaster, converter OG sludge, high-silicon iron concentrate and bentonite according to a weight ratio of 100: 20-30: 60-70: 2-3 to obtain a uniform mixture, wherein the blast furnace gas plaster has water content less than 8%, carrying out wet-grinding, briquetting and drying on the mixture to obtain raw pressed blocks, feeding the raw pressed blocks into a tunnel kiln, and carrying out pre-heating and reduction calcination to obtain the metallized furnace charge. The technology realizes reasonable matching of all the raw materials, realizes reasonable utilization of iron oxide, carbon and calcium oxide components in the iron-containing dust and has a product iron grade more than 55% and a metallization rate more than 85%. The technology has the advantages of simple processes, large treatment amount, full resource recovery utilization and less pollution.

The invention belongs to the technical field of comprehensive utilization of resources, and relates to an active coke for flue gas desulfurization, and a preparation method thereof. The preparation method comprises the following steps: mixing low metamorphic pulverized coal, semicoke powder, phenolic resin, sodium humate and sodium bentonite to obtain a mixture A, wherein the mixture Acontains, bymass, 35-42.5% of the low metamorphic pulverized coal, 35-42.5% of the semicoke powder, 5-15% of the phenolic resin, 5-15% of sodium humate and 5-15% of sodium bentonite; adding an ethanol solution of which the solute mass is 8-10% and deionized water into the mixture, uniformly mixing, and performing compression molding under the pressure of 5-7 MPa to obtain formed material strips; drying the formed material strips; carbonizing and activating the dried formed material strips in a protective atmosphere; and carrying out activation treatment to obtain the active coke material for flue gas desulfurization. The method is simple in process and low in cost, and opens up a new development and application way for high-added-value utilization of the low-rank coal.

The invention discloses a process for using blast furnace titanium slag to absorb and regenerate waste lubricating oil. The adsorption and regeneration reaction of the waste lubricating oil is carried out under the reaction temperature of 120° C. to 120° C. under the agitation of the stirrer. After the reaction is completed, the blast furnace titanium slag is filtered to obtain the regenerated lubricating oil. The invention has simple process conditions, less investment and lower operating cost, and can effectively reduce the cost of adsorption and regeneration of waste lubricating oil. At the same time, using the activity of TiO2 in blast furnace titanium slag and using blast furnace titanium slag as an adsorbent to carry out adsorption and regeneration of waste lubricating oil can realize high value-added utilization of blast furnace titanium slag, and the social and economic benefits are very obvious.

The invention discloses a preparation method of three-dimensional boron-nitrogen co-doped three-dimensional layered carbon for a water system high-voltage supercapacitor, and belongs to the technicalfield of carbon material preparation. According to the method, osmanthus fragrans is used as a carbon source, a potassium borate activator and 2-methylimidazole are used as a nitrogen doping agent; the method comprises the following steps: dissolving osmanthus fragrans in a mixed solution of potassium borate and 2-methylimidazole, heating, freeze-drying, transferring the obtained mixture to a corundum boat, placing the corundum boat in a horizontal tubular furnace, and heating in an argon atmosphere to prepare the three-dimensional boron-nitrogen co-doped layered carbon. The specific surface area of the obtained three-dimensional boron-nitrogen co-doped layered carbon is high, and when the three-dimensional boron-nitrogen co-doped layered carbon is used as a supercapacitor electrode material, the three-dimensional boron-nitrogen co-doped layered carbon shows ultrahigh capacity and excellent rate capability. The three-dimensional boron-nitrogen co-doped layered carbon for a supercapacitor is directly prepared by adopting a one-step method, and has the advantages that the raw materials are cheap and easy to obtain, the process route is simple and convenient, acid and alkali are not used in the preparation process, and the obtained product is good in performance.

The invention discloses a method for preparing dopamine and a derivative thereof by utilizing agricultural and forestry wastes and special equipment thereof, and belongs to the field of medicine preparation. The method comprises the following steps: mixing the forestry and agricultural residues with an acid a and an extracting agent, and reacting to obtain a product A; mixing the product A with a hydrogen source a and a protective agent, and reacting to obtain a product B; mixing the product B with a de-protecting agent, and reacting to obtain a product C; adding a nucleophilic grafting reagent into the product C, and carrying out nucleophilic grafting reaction to obtain a product D; and hydrolyzing and hydrogenating the product D to obtain the dopamine or the dopamine derivative. The agricultural and forestry waste is used as the main raw material and is prepared into the dopamine and the derivative thereof so that high value-added utilization of the agricultural and forestry waste is realized, the yield of the prepared dopamine and the derivative thereof is relatively high, and a new thought is developed for high-value utilization of the agricultural and forestry waste.

The invention discloses a method for co-producing collagen active peptides and flavor base materials from chicken bones. By adopting a two-stage hot-pressing extraction method and undergoing slight pressure relief and pressure supplementation, the extraction of collagen from chicken bones is greatly improved. The yield of active peptides; the degree of hydrolysis of the enzymolysis solution is improved by homogenizing the osteotin in the extract solution under high pressure before performing the step-by-step enzymatic hydrolysis reaction. In addition, by performing two-stage ultrafiltration on the enzymatic hydrolysis solution, the separation and purification of different products in the enzymatic hydrolysis solution are realized, and subsequent processing is carried out on the products of each molecular segment to obtain osteopolysaccharides, macromolecular polypeptides and small molecules including chondroitin sulfate. Polypeptides and other products can make full use of bone enzymatic hydrolyzate, especially through the Maillard reaction of macromolecular polypeptides with xylose, cysteine ​​and thiamine to obtain rich-flavored flavor bases.

The invention belongs to the technical field of comprehensive utilization of resources, and relates to an active coke for flue gas desulfurization and a preparation method thereof. The mixture is obtained by mixing low-modified pulverized coal, semi-coke powder, phenolic resin, sodium humate and sodium bentonite; In terms of percentage, the mixture A contains 35%-42.5% of low-modified pulverized coal, 35%-42.5% of semi-coke powder, 5%-15% of phenolic resin, 5%-15% of sodium humate, 5%- 15% sodium-based bentonite; add ethanol solution and deionized water with a solute quality of 8%-10% to the mixture, mix uniformly and press under a pressure of 5-7MPa to obtain a molding strip; dry the molding strip Carrying out carbonization and activation treatment on the dried molding strips under a protective atmosphere; obtaining the active coke material for flue gas desulfurization after the activation treatment. The invention has simple process and low cost, and opens up a new development and application path for the utilization of low-rank coal with high added value.

The invention relates to a blast furnace low-carbon ironmaking process, and belongs to the technical field of blast furnace ironmaking production in the metallurgical industry. According to the technical scheme, after oxygen-enriched inert gas is heated through a hot blast stove, blast furnace blast smelting is conducted, the oxygen-enriched inert gas is mixed gas of inert gas and oxygen, and the oxygen accounts for 21%-35% of the volume of the mixed gas. The inert gas is one or more of helium (He), neon (Ne), argon (Ar), krypton (Kr) and xenon (Xe), and the air temperature is 1050-1250 DEG C. The method has the beneficial effects that the oxygen-enriched inert gas is used for replacing air for blast smelting of the blast furnace, so that the difficulty that N2 and CO in the blast furnace gas are not easy to separate can be solved from the source, and high-added-value utilization of the blast furnace gas and low-carbon smelting of the blast furnace are realized.

The invention discloses a method for preparing a manganese-iron alloy based on low-grade manganese ore. The method comprises four processes, namely ball milling of raw materials, pelletizing, quick reduction and slag-metal separation. The method comprises the following steps: mixing low-grade manganese ore and iron ore powder; milling the mixed ore, and screening with a 150-300 meshes screen; mixing the screen underflow with the pulverized coal, lime, bentonite and water, and pelletizing on a disc type pelletizer, wherein the diameter of the green balls is 10-16mm; drying the green balls at 105 DEG C for 4h; reducing the dried pellets at 1,450-1,550 DEG C for 8-15min; and after the reaction, crushing the raw material, and performing simple magnetic separation to obtain granular manganese iron, wherein the manganese content is 45-70%, the iron content is 25-45%, the carbon content is 2-5%, and the balance is impurities. According to the method disclosed by the invention, the manganese-iron alloy is prepared by the one-step process of the quick reducing technology, the slag and metal are easily separated, the process is pollution-free, the manganese recovery rate is high, and high value-added utilization of the low-grade manganese ore is realized.

The invention relates to a construction waste recycled imitation stone brick, the structure of the recycled imitation stone brick comprises a surface layer and a base layer, the base layer comprises the following raw materials: ash cement, a compound of 0-5mm recycled tile aggregate and recycled concrete aggregate, a compound of 5-10mm recycled tile aggregate and recycled concrete aggregate, and an auxiliary agent, the surface layer is prepared from the following raw materials: grey cement or white cement, 0-5mm and 5-10mm recycled concrete aggregate compounds, pigment and auxiliaries. According to the construction waste recycled imitation stone brick developed by the invention, construction waste recycled bricks and tiles and concrete aggregate are used as the base layer and the surface layer aggregate, all indexes meet the requirements of the national standard GB28635-2012 Concrete Pavement Brick through the design of the base layer mix proportion, the product strength is not lower than 40MPa, the cost of the imitation stone brick is greatly reduced, and the production cost is reduced. And high value-added utilization of the construction waste in high-end imitation stone products is realized.