18 results about "Sodium carbonate" patented technology

The invention discloses a production method of distiller's grain fermentation liquid fertilizer specially applied to roxburgh rose. The distiller's grain fermentation liquid fertilizer is prepared bythe step of evenly mixing 50 to 80 parts of distiller's grain fermentation extracting solution, 0.5 to 1 part of microelement, 5 to 10 parts of seaweed meal, 5 to 10 parts of natural active organism,2 to 5 parts of potassium bicarbonate, 2 to 5 parts of natural active organism and 2 to 5 parts of natural surface active agent. A preparation method of the distiller's grain fermentation extracting solution comprises the steps: evenly stirring 50 to 80 parts of distiller's grain, 50 to 150 parts of rice washing water, 1 to 2 parts of EM microflora fermentation liquid and 0.5 to 1 part of sugar, performing composting fermentation at the room temperature to obtain a distiller's grain fermentation material, stirring and extracting through a sodium carbonate water solution, filtering and performing evaporation and condensation on obtained filtrate until the density is 1.1 to 1.2 to obtain distiller's grain fermentation extracting solution. The distiller's grain fermentation liquid fertilizerdisclosed by the invention has a good use effect, meanwhile can effectively prevent pest and disease damage to the roxburgh rose and is high-efficiency environment-friendly liquid fertilizer.

This invention relates to the field of copper smelting technology, and in particular to a desulfurization process for copper melt smelting, comprising the following steps: melting copper or copper alloy raw materials to obtain copper melt; removing the charcoal covering layer on the surface of the copper melt, and adding a desulfurization slagging agent composed of calcium oxide, sodium carbonate, magnesia, and refractory powder; heating the copper melt to 1250–1350°C and holding it at that temperature for 30–60 minutes; after the holding period, removing slag and taking samples for testing; if the sample meets the standards, adding charcoal to complete the desulfurization; otherwise, adding more desulfurization slagging agent. The ratio of the desulfurization slagging agent is matched with the reaction characteristics of sulfur in the copper melt, allowing it to fully react chemically with sulfur to generate sulfide slag that is easily separated from the copper melt, thus improving the thoroughness of desulfurization from the source; simultaneously, timed stirring is performed during the constant-temperature slagging process to promote full contact between the desulfurization slagging material and the copper melt, which helps to improve the uniformity of desulfurization and ensures a stable and reliable desulfurization effect.

This invention discloses a method for deep purification of medium-to-high grade magnetite concentrate to prepare ultrapure iron concentrate, relating to the field of iron ore beneficiation technology in mineral processing engineering. The method includes the following steps: medium-to-high grade magnetite concentrate is sequentially mixed, reduced in size, and impurity removed to obtain beneficiation feed; the beneficiation feed is subjected to a first-stage closed-circuit grinding and a first-stage weak magnetic roughing to remove low-grade tailings, resulting in a first-stage magnetic rough concentrate; the first-stage magnetic rough concentrate is subjected to a second-stage closed-circuit tower grinding, followed by a gradient weak magnetic separation operation consisting of weak magnetic roughing and weak magnetic cleaning, removing magnetic tailings to obtain a second-stage magnetic clean concentrate; the second-stage magnetic clean concentrate is demagnetized to obtain a demagnetized concentrate; the demagnetized concentrate is fed into a two-stage reverse flotation process (roughing and cleaning), where sodium carbonate is used as a modifier and modified dodecylamine MKC-4 is used as a collector for reverse flotation desilication under ambient temperature conditions to obtain the final ultrapure iron concentrate. This invention effectively achieves deep purification of medium-to-high grade magnetite concentrate.

The present application relates to the technical field of organic photoresist wastewater treatment, and particularly relates to an on-line electrochemical degradation and alkalinity maintaining device for organic photoresist components, which comprises a pretreatment unit, an on-line electrochemical degradation unit, a dynamic alkalinity maintaining unit, a product separation unit and a PLC control system, and each unit is sequentially connected through a corrosion-resistant pipeline; the pretreatment unit is used for removing solid particles, suspended impurities, macromolecular organic matters and part of additives in the wastewater; the on-line electrochemical degradation unit adopts a bipolar electrolytic cell structure, and is internally provided with a titanium-based ruthenium-iridium coating anode and a graphite cathode, and is used for electrochemical oxidation degradation of the organic photoresist components; the dynamic alkalinity maintaining unit adopts a sodium hydroxide-sodium carbonate compound lye, and combines on-line pH monitoring and PLC linkage adjustment to stably maintain the pH value of the wastewater at 8.5-10.5; and the product separation unit is used for separating degradation products, precipitates and trace impurities.

The invention provides a carbon sink type tailing soil conditioner as well as a preparation method and a soil treatment method thereof. The invention relates to a carbon sink type tailing soil conditioner, which comprises porous biochar loaded with an alkali-producing microbial agent and a multifunctional composite microbial agent with heavy metal toxicity reduction and efficient carbon sequestration effects; the alcaligenes microbial agent comprises alcaligenes; the multifunctional complex microbial inoculant comprises heavy metal passivating bacteria, carbonic anhydrase secreting bacteria and mycorrhizal fungi; the mycorrhizal fungi comprise at least one of arbuscular mycorrhizal fungi and ectotrophic mycorrhizal fungi; the porous biochar is prepared from the following raw materials: sodium carbonate and organic waste powder. According to the method, the rapid weathering of the tailings, the reconstruction of the soil structure and the efficient storage of CO2 are realized, the soil period is shortened from more than 5 years to 8-12 months, the carbon sink strength is improved to 2.1-3.4 t CO2 / ha.a, and an innovative solution is provided for the goals of ecological restoration and carbon neutralization of mines.

This invention belongs to the field of functional coating technology for soil conditioner particles, specifically relating to a soil loosening agent coating material, a soil loosening agent-coated soil conditioner, and its preparation method. The soil loosening agent coating material comprises the following raw materials: polyacrylamide, a high-temperature resistant binder and stabilizer, and sodium carbonate. This soil loosening agent coating material exhibits excellent high-temperature resistance. After coating the soil conditioner, the polyacrylamide activity retention rate is high. The resulting coated soil conditioner demonstrates excellent performance, with a high polyacrylamide activity retention rate after high-temperature drying. The coating layer adhesion reaches the highest level in the industry, with extremely low powder loss. The particles do not crack, clump, or pulverize. After application to the soil, it can quickly break up compaction, forming a stable granular structure. Simultaneously, it has the functions of water retention, soil stabilization, and water purification, enabling simultaneous fertilization and soil improvement. It is compatible with various soil conditioners and suitable for large-scale agricultural application.

A mold flux for the continuous casting of large-strand ultra-high carbon wear-resistant ball steel and a preparation method therefor. ‌The mold flux is prepared from the following raw materials in parts by weight: 15-28 parts of wollastonite powder, 20-40 parts of an electrically fused pre-melted slag, 3-6 parts of lithium metaborate, 2-8 parts of borosilicate glass, 2-4 parts of sodium fluoride, 5-13 parts of sodium carbonate, 2-7 parts of barium fluoride, 7-11 parts of fluorite powder, 2-5 parts of electrode graphite, 2-5 parts of high-carbon amorphous graphite, 2-4 parts of N660 carbon black and 2-4 parts of dextrin. The mold flux has a relatively low viscosity, a relatively low melting point and a relatively high basicity, improves the lubrication effect on a casting blank, enhances the ability to absorb floating inclusions in the molten steel, reduces the incidence of cracks on the casting blank surface and the occurrence of breakouts, improves the surface and subsurface quality of the casting blank, and increases the production efficiency of continuous casting. The mold flux is particularly suitable for the continuous casting production of large-strand ultra-high carbon wear-resistant ball steel.

This invention belongs to the field of metallurgical solid waste resource utilization technology, specifically relating to a method for selective hydrogen reduction-magnetic separation to recover iron from high-iron tungsten smelting slag. The method includes the following steps: crushing, grinding, and drying the high-iron tungsten smelting slag; then adding a flux and mixing evenly, wherein the flux is a mixture of sodium carbonate and borax; placing the pretreated slag in a reduction furnace, first introducing an inert gas for deoxygenation, then introducing a H₂-Ar mixed reducing atmosphere, and heating to 700-900℃ for selective reduction treatment; cooling, crushing, and grinding the reduced product, and then performing magnetic separation treatment to obtain high-grade iron concentrate and magnetic separation tailings. This invention achieves efficient enrichment and recovery of iron under mild conditions, while avoiding the reduction loss of valuable elements such as tungsten, laying the foundation for the full-component resource utilization of slag.

The invention relates to a method for the manufacture of cellulose carbamate textile fibre, comprising the steps of dissolving cellulose carbamate in an aqueous alkaline medium to form a cellulose carbamate dope comprising zinc; spinning the cellulose carbamate dope into an alkaline aqueous spin bath in a spinning unit, to form filaments or filament tow; and stretching the filaments or filament tow to obtain cellulose carbamate fibres. In the spin bath, sodium hydroxide and sodium carbonate contents are maintained within pre-defined ranges by withdrawing and recycling a portion of the spin bath. The main drawing of the said invention is illustrated in;

The present application relates to a kind of new type of wall protection mud material for ultra-deep underground continuous wall and its preparation method, comprising the following steps: pour mixing water into the first container, while adding bentonite, the first container is stirred to be uniformly dispersed;Sodium carbonate, sodium carboxymethyl cellulose, xanthan gum and silicone acrylic emulsion are mixed and added to mixing water and poured into the second container, and stirred to be fully hydrated;Mix the solution in the first container and the second container, stir to be fully mixed, complete mud preparation.The beneficial effects of the present application are: it can avoid the hidden troubles such as excessive lateral earth pressure, large amount of mud loss, thin and dense mud skin cannot be formed when the excavation depth of underground continuous wall is large, configure a new type of modified bentonite wall protection mud with suitable physical stability and chemical stability, appropriate relative density, good mud skin forming property, which can adapt to the working condition of ultra-deep underground continuous wall, avoid the occurrence of hole collapse and shrinkage phenomenon, so as to ensure the quality of slotting and construction safety.

The utility model relates to the technical field of anhydrous sodium sulphate drying, and discloses anhydrous sodium sulphate drying equipment which comprises a raw material bin, a drying mechanism is arranged on the right side of the raw material bin and used for drying smashed raw materials, a vibrating mechanism is arranged on the right side of the drying mechanism, and a placing frame is arranged on the right side of the vibrating mechanism. A packaging mechanism is arranged in the containing frame and used for packaging finished products, a dust removal mechanism is arranged on the front side of a drying mechanism, the drying mechanism comprises a bottom plate, the left side of the bottom plate is arranged on the right side of a raw material bin, and a plurality of drying machines are fixedly connected to the top of the bottom plate. According to the utility model, the dryer burns natural gas and biomass particles to convey high-temperature hot air into the drying bin to form circulating airflow to dry raw materials, so that the raw materials are stably supplied and fully dehydrated, the drying process is continuous, the raw materials are uniformly dried, and the requirements of product drying efficiency and quality are met.

This invention discloses a method for preparing ammonia-modified activated carbon, which includes the following steps: (1) mixing grapefruit peel powder and sodium carbonate activator in a weight ratio of 3:1 and placing them in a corundum crucible, then heating and carbonizing them in a muffle furnace at 700°C for 2 h, and cooling them to room temperature; (2) grinding the carbonized material into powder, washing it with nitric acid solution, and then drying it in an oven to obtain grapefruit peel-based activated carbon; (3) mixing the grapefruit peel-based activated carbon with ammonia solution of 5-15% by mass and placing it in a three-necked flask; (4) refluxing the reaction at 65°C for 4 h, and repeatedly washing the activated carbon with deionized water until the filtrate is neutral; (5) drying it in an oven at 60°C to constant weight to obtain ammonia-modified activated carbon. This invention optimizes the pore structure of activated carbon through ammonia modification, improves its specific surface area and adsorption capacity, enhances its adsorption capacity for dye molecules, and improves its selectivity for different types of dyes.

This invention relates to a surface-reinforced, flame-retardant, low-odor ultrathin fiberboard and its preparation method, belonging to the field of engineered wood products manufacturing technology. It addresses the technical problems of low surface hardness, high flammability, and significant odor release in ultrathin fiberboard. Key technical points include: wood raw materials are peeled, chipped, steamed, and then hot-milled into pulp; adhesives and a nitrogen-phosphorus-boron ternary flame retardant are added to the fiber pulp; after drying the fibers, the board blank is pre-pressed; a two-component surface-reinforcing agent is prepared, with agent A containing formic acid, chitosan, tannic acid, calcium chloride, and nano-titanium dioxide; and agent B containing sodium carbonate, sodium silicate, nano-zinc oxide, and a waterproofing agent; agents A and B are sprayed sequentially onto the surface of the board blank; and the fiberboard is then hot-pressed. This method improves hardness and flame retardancy through a surface mineralization layer and photocatalytically degrades odor, primarily for use as a drilling pad for printed circuit boards, as a substrate for home decoration, and as a buffer layer for engineered wood products.

A detergent composition for textile products according to an embodiment comprises an amphoteric surfactant (A), a fatty acid alkanolamide (B), at least one carbonate (C) selected from the group consisting of sodium carbonate and potassium carbonate, and at least one hydrogen carbonate (D) selected from the group consisting of sodium hydrogen carbonate and potassium hydrogen carbonate.

The application discloses a water-based polyurethane adhesive waste liquid treatment method, and raw materials used in the method contain solid alkali, solid acid, flocculants, layered double hydroxide, composite magnetic material and heavy metal capturing agent. The composite magnetic material is composed of magnetic nano catalyst and ferroferric oxide nanoparticles. The solid alkali is a mixture of sodium hydroxide and sodium carbonate. The solid acid is a mixture of oxalic acid and phosphoric acid. The application is implemented by five steps. The water-based polyurethane adhesive waste liquid treatment method significantly improves the COD removal rate through the synergistic effect of multiple steps including the acid-alkali oscillation demulsification stage, the flocculation catalytic degradation stage, the magnetic catalytic deep purification stage and the magnetic separation stage. The effluent turbidity is extremely low, and the separation time is greatly shortened by the magnetic separation technology. The treatment effect and efficiency are far superior to those of traditional methods, fully proving the innovativeness and technical advantages of the application.