Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

1430 results about "Decarburization" patented technology

Decarburization (or decarbonization) is the process opposite to carburization, namely the reduction of carbon content. The term is typically used in metallurgy, describing the reduction of the content of carbon in metals (usually steel). Decarburization occurs when the metal is heated to temperatures of 700 °C or above when carbon in the metal reacts with gases containing oxygen or hydrogen. The removal of carbon removes hard carbide phases resulting in a softening of the metal, primarily at the surfaces which are in contact with the decarburizing gas.

Multi-purpose, multi-oxy-fuel, power burner/injector/oxygen lance device

A multi-purpose, multi-oxy-fuel High Temperature Power Burner/Injector/Oxygen Lance, Mechanical System Apparatus Device, for steelmaking from recycled scrap and/or virgin ferrous charge, which can be employed in multi-oxy-fuel (natural gas; pulverized carbonaceous matter; heavy oil), especially by Oxygen Combusted mixture of Natural Gas/Pulverized Carbonaceous Matter in High Temperature Power Burner Mode, for efficient and rapid melting of solid ferrous charge (cold or preheated) in a special steelmaking Metallurgical Furnace or Open Hearth Furnace, Tandem Furnace, BOF, EAF, as its augmenting or only source of thermal energy; more than one Device in Oxygen-Natural Gas/Pulverized Carbonaceous Matter Power Burner Mode, can be employed as the only source of thermal energy in a modified, originally Electric Arc Furnace, as total replacement of Graphite Electrodes and Electric Arc System, the replacement being noticeably more primary energy efficient than the thermal energy provided by Graphite Electrode/Arc System; it also can be employed in an Solid Particles Injector Mode, for injecting of adequately granulated carbonaceous materials or lime into the molten steel for its carburizing or for foamy slag control; further it can be employed in a natural gas shrouded, pulsating oxygen stream, for vertically to the charge oriented soft blow supersonic Oxygen Injection Lance Mode, for decarburization of the molten metal contained in the hearth of the metallurgical furnace and foamy slag control; in one of the embodiments-generally arcuate-pivotally mounted, liquid media cooled composite body, is pivoted into and out of a furnace vessel through a small opening in the shell wall for auto-regulated constant optimal positioning of the Composite Body Tip against solid or molten charge, in each and all multi-purpose modes; furthermore, when inserted into the furnace vessel, the arcuate composite body can be rotated about its longitudinal axis for directing the oxy-fuel high temperature flame towards unmolten charge in the furnace; in an other-generally linear-embodiment, the liquid cooled composite body is attached to the mast type carrier allowing vertical movement of the composite body which enters the furnace vessel through a small opening in the furnace roof; the bimetallic, liquid cooled special tip assembly of both-arcuate and linear embodiments-of the composite body includes easy replaceable, independent, multi-opening nozzles, mounted in a protective, retracted position inside of the liquid cooled special tip assembly.
Owner:EMPCO (CANADA) LTD

Method for metal melting, refining and processing

An improved method and apparatus for metal melting, refining and processing, particularly adapted to steel making in an electric arc furnace. The method provides auxiliary thermal energy to the steel making process, particulate injection for the formation of slag and foamy slag, and oxygen injection for the decarburization of the melt, for the formation of foamy slag and for post combustion burning of carbon monoxide. The burner includes two injection barrels for providing finely pulverized particles and for providing either a supersonic or a subsonic primary flow of an oxidizing gas. The barrels are positioned side by side in a nozzle at the entrance of a flame shaping chamber of a fluid cooled combustion chamber. The nozzle also contains a plurality of fuel orifices for the providing pressurized fuel to the combustion chamber and a plurality of oxidizing gas orifices for providing a secondary flow of an oxidizing gas around the periphery of the nozzle. Because all of the flows of fuel, oxidizing gas and particulates pass through the flame shaping chamber, they are all substantially directed to the same location in the electric arc furnace. The directionality of the flows allows the burner to heat a localized spot of the slag with thermal energy from the oxidation of the fuel, from the oxidation of oxidizable components in the slag or the melt by the lancing of supersonic oxidizing gas, or from any combination of these. Once a spot in the slag is sufficiently heated, a flow of carbon is directed to the localized hot spot in the slag to reduce the FeO, and other oxides, in the slag to carbon monoxide and produce foamy slag. The particulate carbon introduction can be accompanied by further oxidizing gas injection before, during or after the carbon injection.
Owner:PROCESS TECH INT

Multi-pollutant removing technique and device of fuel coal smoke

The invention discloses a removal technology of removing coal-fired flue gas pollutants and a device thereof. The technology is as follows: an SCR denitration method is first used for removing NOX in the flue gas; then a dust collector is used for removing dusts and ash particles in the flue gas; then a wet calcium-based desulphurization method is used for removing SO2 in the flue gas; then an MEA decarburization process is used for absorbing the SO2 in the flue gas; simultaneously, a pregnant solution of a generated alkanolamine solution is heated, analyzed and regenerated and the generated barren solution of the alkanolamine solution is continuously and cyclically used; and the analyzed CO2 gas with high concentration is produced to be liquid carbon dioxide of industrial grade with high purity after being cooled, gas-liquid separated, dried, compressed and condensed. The device consists essentially of an SCR denitration reactor, the dust collector, a wet calcium-based desulphurization reactor, an MEA decarburization absorption tower, a regeneration tower, a gas-liquid separator, a dryer, a compressor, a condenser and the like which are connected with each other by pipes. The device has simple and compact overall design, low investment and operation costs, and stable and reliable work and can conduct classified integration processing and highly efficient simultaneous removal on every pollutant in the coal-fired flue gas.
Owner:WUHAN KAIDI ELECTRIC POWER ENVIRONMENTAL

Method and apparatus for improved EAF steelmaking

An improved method and apparatus for EAF steelmaking wherein the method provides additional thermal energy to the steel making process, carbon injection for the formation of foamy slag, and oxygen injection for the decarburization of the melt, the formation of foamy slag and post combustion burning of carbon monoxide. The apparatus comprises a unique burner configuration which has a central conduit for alternatively supplying fluid hydrocarbon fuel or particulate carbon with a carrier gas which are discharged through a exit opening. The fuel or carbon is mixed with a high speed, preferably supersonic, stream of oxidizing gas. The high speed stream of oxidizing gas is provided by an annular supersonic nozzle which causes the oxidizing gas to surround the fuel or the particulates with an annular flow. The annular nozzle design can be adjusted to direct the flows of particulates and oxidizing gases in the areas and shapes desired for efficient management of the steelmaking process. Optionally, the burner can have another conduit for the secondary supply of a pressurized flow of hydrocarbon fluid fuel to a series of apertures which surround the annular flow. Further, optionally, the burner can have another conduit for the supply of a pressurized flow of a secondary oxidizing gas to a series of apertures which surround the annular flow.
Owner:PROCESS TECH INT

Method for removing various gaseous pollutants from smoke gas

InactiveCN101745305ASolve the problem of separate managementImprove mercury removal performanceDispersed particle separationAir quality improvementMulti pollutantSlurry
The invention provides a method for removing various gaseous pollutants from smoke gas, which is used for solving the problem of limitation of the control and government technology on various pollutants in the smoke gas. The invention utilizes an absorption tower for fully removing SO2, NOX, mercurial vapor and CO2 in the smoke gas, the lower part of the absorption tower is provided an absorptionpulp tank, the middle of the absorption tower is provided with a spraying pipe, the upper part of the absorption tower is provided with an oxidizing agent pipe, the absorption tower is provided with partition boards in the vertical direction, both sides of the partition boards are respectively a desulfurization work section and a denitration and decarburization work section, the upper part of theabsorption tower is a communication oxidization region, the smoke gas enters the desulfurization work section from an inlet of the absorption tower to complete the removal of SO2 and HCL, the smoke gas continuously goes upwards to enter the oxidization region, and NOX is oxidized into water-soluble high oxide in the oxidization region and then enters the denitration and decarburization work section to complete the removal of the NOX, the mercurial vapor and the CO2. The invention breaks through the technical bottlenecks of complicated equipment and high running cost for simultaneously removing various gaseous pollutants from the smoke gas in the prior art. The process method and the device of the invention have the unique novelty.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Technological method for producing high-purity low-iron aluminum sulfate by using coal ash and comprehensively utilizing coal ash

The invention discloses a technological method for producing high-purity low-iron aluminum sulfate by using coal ash and comprehensively utilizing the coal ash, comprising the following steps of: carrying out mechanical activation, flotation decarburization, magnetic separation for deferrization, aluminum extraction with sulfuric acid, solid-liquid separation, concentration of aluminum sulfate crude liquor, organic alcohol alcoholization for acid rinse, organic alcohol alcoholization for deferrization and aluminum sulfate dewatering and drying on the coal ash to obtain the high-purity low-iron aluminum sulfate with low Fe content. The invention solves the problems on impurity removal and purification of the aluminum sulfate in the recycling process of the coal ash, simplifies the process flow, reduces the energy consumption, solves the technical problem of overlarge accumulation of secondary residue quantity, achieves high extraction ratio of aluminum contained in the coal ash, and realizes the recycling of organic alcohol and sulfuric acid and the comprehensive utilization of side products including unburnt black, magnetic iron powder, iron-containing aluminum sulfate crystals, high-silicon-dust active mineral blending materials or novel silicon-magnesium cement, and the like. The technological method has the advantages of simple process, short flow, easiness for control of a production process, high aluminum extraction ratio, low impurity content of products and stable quality.
Owner:内蒙古昶泰资源循环再生利用科技开发有限责任公司 +2

Hardening and tempering high-strength steel plate for wood based panel equipment and production method of tempering high-strength steel plate

InactiveCN102181794AFine tissue structureGood welding performanceImpurityDecarburization
The invention relates to a hardening and tempering high-strength steel plate for wood based panel equipment and a production method of the steel plate, and belongs to the field of manufacturing low-alloy high-strength structural steel. The steel plate consists of the following chemical components in percentage by weight: 0.18 to 0.24 percent of C, 0.20 to 0.50 percent of Si, 0.80 to 1.20 percent of Mn, more than or equal to 0.02 percent of P, more than or equal to 0.01 percent of S, 0.20 to 0.50 percent of Mo, 0.20 to 0.50 percent of Ni, 0.70 to 1.00 percent of Cr, more than or equal to 0.003percent of B, 0.017 to 0.030 percent of Nb, 0.040 to 0.050 percent of V, 0.017 to 0.026 percent of Ti, and the balance of Fe and inevitable impurities. The production method of the steel plate comprises the following steps of: electric furnace smelting, vacuum decarburization /vacuum arc decarburization (VD/VOD) furnace vacuum decarburization, ladle furnace (LF) furnace refining, continuous casting (die casting), billet steel (ingot) clearing, heating, plate rolling, hardening and tempering, steel plate checking and polishing, tempering, sampling inspection, and warehousing. The hardening andtempering high-strength steel plate for the wood based panel equipment adopts Cr-Ni-Mo-B system micro-alloy elements for composite strengthening, and acquires good obdurability matching through a reasonable heat treatment process, and simultaneously the welding performance of a thick plate is not reduced.
Owner:WUYANG IRON & STEEL +1

Control method for preventing nozzle clogging in casting process of ultra-low carbon-aluminium deoxidized molten steel

The invention relates to a control method for preventing nozzle clogging in a casting process of ultra-low carbon-aluminium deoxidized molten steel, and belongs to the technical field of a steelmaking technology. The technical scheme is that a process path of molten iron desulfurization treatment, converter smelting, converter steel tapping, Rheinstahl Heraeus (RH) vacuum treatment, and continuous casting of a dual-flow slab is adopted to smelt ultra-low carbon steel, so that the castability of the ultra-low carbon-aluminium deoxidized molten steel is improved; the oxygen content of the molten steel of a converter blowing end-point, the carbon content and the temperature of the endpoint are reasonably controlled; a favorable condition is provided for RH vacuum decarburization; pouring is protected in a continuous casting manner; secondary oxidization of the molten steel is prevented by adopting blowing-argon sealing protection of a long-nozzle and a submersed nozzle; secondary oxidization of the molten steel is prevented by using an alkaline covering agent; an occluded foreign substance in the molten steel is well adsorbed; the castability of the ultra-low carbon-aluminium deoxidized molten steel is improved; the targets of no choking of the submersed nozzle and no change of the submersed nozzle in a complete multi-furnace continuous casting process are achieved. Thus, the effect on a casting blank caused by replacement of the submersed nozzle is avoided.
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY

High-grade non-oriented silicon steel with excellent magnetism and smelting method for high-grade non-oriented silicon steel

InactiveCN102796947ASlagFerrosilicon
The invention discloses a method for smelting high-grade non-oriented silicon steel with excellent magnetism. The method comprises the following steps of: 1) smelting, namely smelting the following chemical components: less than or equal to 0.005 weight percent of C, 2.6 to 3.4 weight percent of Si, 0.2 to 0.5 weight percent of Mn, less than or equal to 0.2 weight percent of P, less than or equal to 0.005 weight percent of S, 0.3 to 1.6 weight percent of Al, less than or equal to 0.005 weight percent of N, less than or equal to 0.005 weight percent of O, less than or equal to 0.0015 weight percent of Ti, and the balance of Fe and inevitable inclusions, and modifying ladle top slag in the tapping process of a converter so as to ensure that the ladle top slag comprises 30 to 37 weight percent of CaO, 7 to 20 weight percent of SiO2, 35 to 45 weight percent of Al2O3, 5 to 9 weight percent of MgO, and 0.6 to 2.6 weight percent of T.Fe+MnO when the Ruhrstahl-Heraeus (RH) refining treatment begins; 2) performing RH refining, namely deoxidizing by using ferrosilicon when the decarburization of the RH refining is finished, wherein the adding speed of the ferrosilicon is less than or equal to 12.5kg/ton/min; and 3) adding 0.5 to 2.0 kg of calcium alloy into each ton of molten steel for the denaturation control of inclusions after the deoxidization and alloying are performed through the RH refining.
Owner:BAOSHAN IRON & STEEL CO LTD

Method for processing Fischer-Tropsch synthesis tail gas

The invention relates to a method for processing Fischer-Tropsch synthesis tail gas, which comprises the steps of decarburization, membrane separation, low temperature oil washing, tail gas conversion and pressure swing adsorption(PSA). The method is characterized in that tail gas from a Fischer-Tropsch synthesis apparatus is passed through a decarburization unit for removing CO2 component; decarburization tail gas is sent to a membrane separation unit for recovering hydrogen, membrane separation penetration gas with rich hydrogen is boosted and then sent to a PSA unit for hydrogen production, also can be returned to the Fischer-Tropsch synthesis apparatus after boosting, the membrane separation unit can be returned to the Fischer-Tropsch synthesis apparatus according to the required gas with any H2/CO proportion, membrane separation non-penetration gas can be passed through a low temperature oil washing unit for recovering liquefied gas component and then sending to a tail gas conversion unit, and also can be sent to the tail gas conversion unit directly for hydrogen production; in the tail gas conversion unit, oil washing dry gas or membrane separation non-penetration gas are conversed, methane and hydrocarbons components are conversed to crude synthetic gas; the conversed crude synthetic gas converses CO and H2O to CO2 and H2, the conversed gas after decarburization removes CO2 to obtain hydrogen rich gas, the hydrogen rich gas is passed through the PSA unit for recovering hydrogen, hydrogen in the PSA unit can be used for whole plant, the analytic gas can be used as fuel gas.
Owner:SYNEFUELS CHINA

Method for preparing magnesium metal and by-product by vacuum carbothermic reduction with serpentine minerals

InactiveCN101560603AHigh in magnesiumNo need for calcination to remove carbonProcess efficiency improvementMagnetic separationSlagMassicot
The invention discloses a method for preparing a magnesium metal and a by-product by vacuum carbothermic reduction with serpentine minerals. The method comprises the following steps: using serpentine mineral powder as a raw material; adding a carbonaceous reducing agent which is 1 to 2 times of the theoretical quantity of carbon required for completely reducing magnesium silicate in the serpentine; adding a catalyst, and mixing the materials evenly to obtain a mixed raw material; pressing the mixed raw material into spherical or blocky ball agglomerations and drying the ball agglomerations; putting the dried ball agglomerations into a vacuum furnace, controlling the vacuum degree in the furnace to between 10 and 500 Pa, raising the temperature to between 500 and 700 DEG C, and keeping the temperature for 20 to 60 minutes to remove crystal water and clinker the materials; keeping the vacuum degree in the furnace, raising the temperature to between 1,200 and 1,500 DEG C, and reducing the magnesium silicate and oxides of metallic iron and nickel at a constant temperature for 30 to 60 minutes; and condensing magnesium vapor obtained from the reduction on a magnesium condenser into crystallized magnesium, recycling the metallic iron and the metallic nickel in the slag through magnetic separation, and preparing the slag after the magnetic separation into industrial silicon carbide through decarburization and purification.
Owner:北京华夏建龙矿业科技有限公司

Method for particulate introduction for metal furnaces

A method and an apparatus for advantageously introducing a flame, a high velocity oxidizing gas, and a high velocity particulate flow into a furnace for metal melting, refining and processing, for example, steel making in an electric arc furnace. The steel making process of an electric arc furnace is made more efficient by shortening the time of the scrap melting phase, introducing a more effective high velocity oxidizing gas stream into the process sooner to decarburize the melted metal and introducing a more effective particulate injection to reduce FeO, form or foam slag and/or recarburize. Improved efficiency is obtained by mounting a fixed burner/lance and carbon injector lower and closer to the hot face of the furnace refractory at an effective injection angle. This mounting technique shortens the distance that the flame of the burner has to melt through scrap to clear a path to the molten metal, and shortens the distance the high velocity oxygen and high velocity particulates travel to the slag-metal interface. One method includes supplying a plurality of oxidizing reaction zones with the high velocity oxidizing gas to decarburize the melted metal and a plurality of particulate reaction zones with high velocity flows of particulate carbon for reducing FeO and/or forming foamy slag. The particulate reaction zones are located on the downstream side of the oxidizing gas reaction zones so as to minimize any effect of the reduction reaction on the decarburization reaction and to recover a part of the hot FeO produced in the oxidizing gas reaction zones.
Owner:PROCESS TECH INT

Stainless steel high temperature oxidation resistance paint and application thereof

The invention relates to the technology field of an antioxidation coating, in particular to a stainless steel high-temperature oxidation-resistant coating and the application thereof, and solves the problems in the prior stainless steel oxidation-resistant coating such as complex production process, high cost, low protection temperature, narrow painting temperature range and so on. The stainless steel high temperature oxidation-resistant coating is prepared with organic powdered ore in an amount of 30 to 50 parts; an inorganic binder in an amount of 50 to 70 parts; a suspending agent in an amount of 0.1 to 1 part; and water in an amount of 200 parts. The stainless steel high temperature oxidation-resistant coating is applicable to oxidation protection/decarburization when semi-finished nickel chromium stainless steel products are heated for 0.5 to 30 hours at the temperature of 800 DEG C to 1500 DEG C, and is sprayed or coated on stainless steel surfaces within the range from room temperature to 500 DEG C. The coating thickness ranges from 50 Mu m to 300 Mu m. The coating formed at the high temperature forms a vitreous dense coating during high-temperature processing of a stainless steel basal body, and prevents oxygen from spreading on the surface of the stainless steel basal body, thus resisting oxidation, alleviating depletion and decarburization of microelements on stainless steel surfaces, and improving the rolling quality of the surface of the base body. The raw materials used for preparing the coating are cheap, and the coating is friendly to the environment. The preparation process is simple. The high-temperature oxidation and melting loss of various semi-finished nickel chromium stainless steel products is reduced by more than 90 percent, and the output and the yield of good plate blanks can be improved.
Owner:SHANXI XIHUI TECH

Feito synthetic oil processing line

The invention relates to a processing flow of FT synthetic oil, which comprises hydrogenation, low-temperature oil washing, decarburization and PSA. The invention is characterized in that the synthetic oil is mixed with hydrogen via a filter, and enters a hydrogenated prerefining reactor after heat exchange, then enters a hydrogenated refining reactor after the synthetic oil is heated to 300 to 380 DEG C by a heating furnace; oxygen-containing compounds, unsaturated hydrocarbons and metal impurities in the raw material are extracted; the hydrogenated refined product enters a high thermal separator for separation of oil phase and gas phase after heat exchange, and enters a hydrocracking reactor for hydrocracking after heat exchange and heating of the heating furnace; the cracked product and the refined product are mixed to enter a fractionation system; a combined flow with two stages connected in series is adopted for the hydrogenated refining reactor and the hydrocracking reactor which share a recycle hydrogen system; a fractionation system is shared by the hydrogenated refined oil and the hydrocracked oil; and a three-column process flow is adopted for the fractionation system. The invention has the advantages of low gas consumption of the low-temperature oil washing process, high recovery of light hydrocarbons, less matching investment, and reduction of energy consumption and improvement of hydrogen recovery rate due to the decarburization process.
Owner:中国石油集团工程设计有限责任公司抚顺分公司

Method for producing high-purity pure iron

The invention provides a method for producing high-purity pure iron, which comprises the following steps of: (1) preliminary desulphurization of molten iron: controlling the sulphur content of molten iron charged into a revolving furnace at 0.002%-0.015%; (2) smelting of the revolving furnace: dephosphorizing by using the double slag process, tapping slag after dephosphorization, changing slag, controlling C to be less than 0.03% and P to be less than 0.008% at blowing end, carrying out slag-blocked tapping and aluminium deoxidation, and hanging pots at temperature of above 1635 DEG C; (3) slagging off: removing more than 95% of oxidizing slag; (4) RH deep decarburization: controlling RH charging temperature to be above 1615 DEG C, controlling C to be less than 0.002% and Als to be from 0.020% to 0.035% at smelting end, and controlling the discharging temperature to be above 1645 DEG C; (5) LF (Low Frequency) deep decarburization: adding a deep dephosphorizing agent before entering anLF station, stirring with argon gas, adding a slagging constituent after entering the LF station, stirring with a great amount of argon gas, controlling C to be less than 0.0025%, S to be less than 0.0015%, Als to be less than 0.010% and discharging temperature to be from 1600 DEG C to 1605 DEG C; and (6) continuous casting of plate blanks. The invention has the advantages of low production cost and high efficiency; and the purity of the produced product reaches more than 99.9%.
Owner:ANGANG STEEL CO LTD

Microalloying third-generation car spring flat steel and preparing method thereof

The invention relates to a microalloying third-generation car spring flat steel and a preparing method thereof. The microalloying third-generation car spring flat steel comprises, by weight percentage, 0.48%-0.60% of C, 0.4%-0.8% of Si, 0.60%-1.00% of Mn, 0.80%-1.20% of Cr, 0.01%-0.05% of Nb, 0.0005%-0.003% of B, not larger than 0.025% of P, not larger than 0.025% of S, not larger than 0. 25% of Cu, not larger than 0.35% of Ni, not larger than 0.02% of Ti and the balance Fe. The preparing method includes the steps of blast furnace molten iron production, molten iron desulphurization, converter smelting, LF refining, RH vacuum treatment, square billet protection pouring, square billet heating, rolling, cooling bed slow cooling and fixed-size shearing. According to the microalloying third-generation car spring flat steel and the preparing method, niobium and boron microalloying and the silica content more suitable for the spring steel high elasticity ultra-low decarburization trend are adopted, the proper clean steel smelting process, rolling process and slow cooling control technology are adopted in a combined manner, and the high-end car spring flat steel having uniform texture, good hardenability, reasonably-matched comprehensive mechanicalness and good hardenability is developed.
Owner:东风汽车底盘系统有限公司

Process method for treating coking wastewater

The invention discloses a process method for treating coking wastewater. The process method solves the technical problems that a micro-electrolysis method has hardening, channeling and narrow applicability of a pH range and a biochemical treatment process has long flow, large occupied area, poor impact load resistance and high expense. The method comprises a physical-chemical treatment unit consisting of a micro-electrolysis reactor and a settling tank; in the micro-electrolysis reactor, scrap iron, scrap copper and a lightweight blocky material are used as fillers; the pH of inlet water is between 2.0 and 6.0; the waterpower retention time is between 20 and 60 minutes; the method adopts air aeration; the method also comprises a filtering type inner circulating three-phase fluidized bed reactor biochemical treatment unit, and immobilized activated sludge balls are utilized to realize simultaneous denitrification and decarburization; the pH of inlet water is between 7.2 and 8.5; the concentration of dissolved oxygen is between 2 and 6mg/L; the temperature is between 28 and 32 DEG C; the waterpower retention time is between 20 and 40h; the COD of outlet water reaches secondary standard of integrated wastewater discharge standard; and volatile phenol, ammonia nitrogen and chroma reach primary standard of integrated wastewater discharge standard.
Owner:NANJING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products