468 results about "Cyanide" patented technology

The utility model discloses a thermal hydrolysis cyanide breaking device, which relates to the technical field of wastewater treatment and comprises a cyanide breaking reactor, a wastewater heat exchanger, a pipeline mixer, a steam mixer, an instrument control valve and the like. After being heated by the wastewater heat exchanger, the wastewater enters a cyanide breaking reactor, and steam enters a steam mixer to heat the wastewater to a specified temperature and then enters the cyanide breaking reactor. The characteristic that the cyanide aqueous solution is easy to hydrolyze is utilized, so that the cyanide aqueous solution is hydrolyzed at the temperature of higher than 140 DEG C to produce sodium formate and ammonia, the toxicity of cyanide is eliminated, high-temperature wastewater discharged from the cyanide breaking reactor enters the wastewater heat exchanger to exchange heat with wastewater to be treated, and heat is recovered; the pressure of the reactor is controlled through a wastewater heat exchanger outlet wastewater outlet pipeline pressure regulating valve. The cyanide wastewater treatment device is reasonable in design, only a small amount of sodium hydroxide is needed for adjusting the pH of wastewater, no chemical agent needs to be added in other procedures, the cyanide wastewater treatment efficiency is improved, and the cost is saved.

The invention belongs to the technical field of surface treatment, and particularly relates to a method for predicting the thickness of a cyanide-free electrogalvanizing coating. Comprising the following steps: step 1, preparing a cyanide-free electrogalvanizing solution; 2, cyanide-free electrogalvanizing test parameters are designed, and a test is conducted; 3, the thickness of a cyanide-free electrogalvanizing coating is obtained according to a cyanide-free electrogalvanizing test; step 4, establishing a cyanide-free electrogalvanizing coating thickness model; and 5, performing parameter optimization on the cyanide-free electrogalvanizing coating thickness model, thereby predicting the cyanide-free electrogalvanizing coating thickness according to the parameter-optimized cyanide-free electrogalvanizing coating thickness model.

The invention provides a cyanide generation and absorption efficiency monitoring method based on double-color indicator gradient change, and belongs to the technical field of cyanide monitoring, the absorption process is visually reflected through the double-color indicator gradient change, the absorption efficiency can be rapidly judged through color change without a complex instrument, the operation is simple and convenient, and the cost is low. And gradient color development and spectral analysis are combined, so that the detection limit can reach a mu g / L level, the trace detection requirement is met, and the absorption condition of the low-concentration cyanide can be accurately monitored. Through real-time change of the color gradient, the concentration distribution and the reaction process of the cyanide in the absorption process can be dynamically reflected, real-time data support is provided for industrial process control and environmental emergency monitoring, expensive detection equipment is not needed, the reagent cost is low, and the method is suitable for large-scale popularization and application.

The invention discloses a method for quantitatively testing the content of organic carbon and disseminated particle size in gold ore, and belongs to the technical field of gold ore detection. The method comprises the steps of sample preparation and quantitative testing, wherein palm wax serves as a cementing agent, barite serves as a standard sample, and a to-be-tested sample is prepared through melting, mixing, consolidation, polishing and carbon spraying; the quantitative test is based on an automatic process mineralogy test system, palm wax backgrounds are removed through backgrounds deduction, an energy spectrum library is established to recognize organic carbon and barite particles, the area ratio of the organic carbon and the barite particles is measured, the mass ratio is converted by combining the density ratio, the organic carbon content of raw ore is inversely calculated, and meanwhile, the particle size distribution of the organic carbon is counted. The method solves the problem that the content and granularity of organic carbon cannot be accurately quantified at the same time in the prior art, has the advantages of high test precision, high efficiency, comprehensive parameters and simplicity and convenience in operation, and can provide key data for optimization of a gold ore cyanidation leaching process.

The invention discloses a high-voltage chloride solid electrolyte with a stable in-situ polyacrylonitrile flexible ion transmission interface layer and a preparation method and application thereof, and belongs to the technical field of solid electrolytes. According to the invention, an in-situ polymerization reaction is initiated by using polyvalent central metal ions contained in a specific chloride solid electrolyte to generate an electrophilic induction effect on a nitrile monomer, so that a uniform and complete polyacrylonitrile artificial organic flexible ionic conductor interface layer is formed on the surface of the chloride solid electrolyte; and the crystal structure and the ionic conductivity of the chloride solid electrolyte are not damaged. The lossless interface layer can effectively enhance the electrochemical stability of the solid electrolyte, can be matched with a high-voltage lithium ion positive electrode material, can enhance the air stability of the electrolyte and the mechanical stability of an electrode-electrolyte interface, and can remarkably inhibit the generation of pores and electrode cracks at the interface; the rate capability and the cycle life of the lithium ion solid-state battery are improved.

The invention provides a beneficiation method for copper-zinc associated gold ore, and relates to the field of beneficiation. The raw ore is subjected to pulping, copper, zinc and other floatable roughing, and copper, zinc and other floatable rough concentrate and copper, zinc and other floatable roughing tailings are obtained; performing copper separation roughing on the iso-floatable rough concentrate to obtain copper rough concentrate and separation roughing tailings, performing concentration on the copper rough concentrate to obtain copper concentrate, and performing scavenging on the separation roughing tailings to obtain zinc scavenging concentrate; zinc-sulfur mixed roughing is carried out on floatable roughing tailings such as copper and zinc to obtain zinc-sulfur roughing concentrate and zinc-sulfur roughing tailings, zinc-sulfur concentration is carried out on the zinc-sulfur roughing concentrate to obtain zinc-sulfur concentrate, zinc-sulfur separation roughing is carried out on the zinc scavenging concentrate and the zinc-sulfur concentrate to obtain zinc rough concentrate and sulfur rough concentrate, and scavenging is carried out on the sulfur rough concentrate to obtain sulfur concentrate; zinc concentration is carried out on the zinc rough concentrate to obtain gold-containing zinc concentrate, carbon leaching is carried out on the gold-containing zinc concentrate to obtain leached ore pulp and gold-loaded carbon, filter pressing is carried out on the leached ore pulp to obtain zinc concentrate and cyanogen-containing barren liquor, and the gold-loaded carbon is analyzed to obtain regenerated carbon and pregnant solution. According to the method, efficient comprehensive recovery of raw ore is achieved.

The invention discloses a method for reducing cyanide in the grain moistening process of Maotai-flavor liquor, and belongs to the technical field of liquor brewing. The brewing raw material sorghum is subjected to gamma-ray irradiation pretreatment, and an abscisic acid solution is applied for multiple times in the grain moistening step in the brewing process. According to the method, 60Co-gamma ray irradiation and abscisic acid solution treatment are combined, the content of cyanogenic glycoside in baijiu brewing is controlled from the source, the content of cyanogenic glycoside in baijiu is remarkably reduced on the premise of not changing indexes such as moisture, crude protein, crude fat, total ash content, amylose and reducing sugar related to the quality of sorghum, and the quality of the baijiu is improved. And 105221.56 [mu] g / kg of a blank control group is reduced to 1395.32 + / -164.29 [mu] g / kg.

The invention discloses a carbamoyl-substituted diarylethene derivative as well as a preparation method and application thereof, and the preparation method comprises the following steps: reacting R-substituted 3-bromo-2-hydroxybenzaldehyde with an arylmethyl triphenylphosphonium bromide compound or an aryl acetic acid compound to obtain an intermediate A; then the intermediate A and cuprous cyanide are subjected to a heating reaction in N, N-dimethylformamide and nitrogen atmosphere, and an intermediate B is obtained; and finally, heating the intermediate B, acetaldoxime and indium trichloride in toluene for reaction to obtain the carbamoyl-substituted diarylethene derivative. The carbamoyl-substituted diarylethene derivative disclosed by the invention has a remarkable effect in an in-vitro anti-tumor activity test, particularly has excellent anti-proliferation ability to human BRCA mutant tumor cells, and can be used for preparing medicines for treating PARP-1 activity abnormity related diseases. The synthesis route is simple, the cost is low, and large-scale implementation is facilitated.

The invention relates to the technical field of environmental analytical chemistry, and discloses a thymol phenolphthalein-TBPE double indicator-based cyanide titration detection method and system, and the method comprises the following steps: adjusting a water sample to be detected to an alkaline pH interval to construct a detection matrix; the method comprises the following steps: introducing a double-indicator system composed of thymol phenolphthalein and tetrabromo phenolphthalein ethyl ester according to a specific ratio into a detection matrix, and constructing a spectrum background for masking yellow interference of sulfide by utilizing the blue color development characteristic of thymol phenolphthalein; dropwise adding a silver nitrate standard solution into the mixed system to execute a complex reaction; according to the method, a spectrum background shielding field is constructed, chromaticity response of a system in a specific wave band is monitored in real time, and when a chromaticity mutation signal from green to bluish violet is captured, a titration end point is judged, and the cyanide concentration is calculated. High-precision anti-interference detection on cyanide in a complex high-turbidity matrix is realized, and the sensitivity and accuracy of end point recognition are improved.

The utility model discloses a low-cost device for treating high-concentration cyanide-containing wastewater, which comprises a first wastewater delivery pump (1), a primary reaction tank (4), a secondary reaction tank (6), a regulating tank (7) and a second wastewater delivery pump (8) which are sequentially connected, the primary reaction tank (4) is connected with a special cyanide breaking device (2) through a pipeline, and the regulating tank (7) is connected with a NaOH solution storage tank (3) through a pipeline. According to the method disclosed by the utility model, the oxidizing agent is prepared by adopting the special cyanide breaking device, the strong oxidizing property of the oxidizing agent is utilized, the cyanide breaking reaction is carried out on the high-concentration cyanide-containing wastewater treatment device, and the wastewater can stably reach the standard without adjusting the pH value of the wastewater on the basis of not changing the original treatment device.

The utility model relates to a kind of reaction tank equipment suitable for cyanide-containing tailings, applied to green environmental protection technical field.Reaction tank equipment includes closed and inclined tank body and installation on the stirring part of tank body, constant temperature part, spraying part, gas inlet part;Tank body includes tailings import and tailings export, tailings export is located at tank body bottom, so that tailings export in opening state, tailings in tank body rely on self gravity and slide out;Stirring part group is set in tank body, for the tailings in tank body are stirred;Constant temperature part is covered in tank body outside;Spraying part includes spray head and liquid inlet, spray head is towards the inner cavity of tank body, liquid inlet is used to be connected with at least one liquid storage tank;Gas inlet part includes gas outlet and gas inlet, gas outlet is communicated with the inner cavity of tank body and is close to tank body bottom setting, gas inlet is used to be connected with at least one gas storage tank.The scheme provided by the utility model can realize green de-cyan treatment and improve processing efficiency in the whole process of tailings recovery.

The invention relates to a gold oxide ore carbon slurry cyaniding smelting extraction method which comprises the following steps: 1) pretreating ore pulp: adding lime milk into gold oxide ore powder, adjusting the pH value to be greater than 10.5 to obtain ore pulp, then adding a pretreating agent, and fully and uniformly mixing to obtain pretreated ore pulp; (2) synchronous cyaniding leaching and adsorption are conducted, specifically, the pretreated ore pulp is subjected to synchronous leaching and adsorption, in the process, the concentration of free cyanogen is controlled to be 0.04%-0.06%, the PH value is controlled to be larger than 10.5, the concentration of a carbon adsorbent is controlled to be 18-22 g / L, and a gold loading material is obtained; the gold loading material is desorbed till the gold concentration in a desorption solution is smaller than or equal to 0.2 mg / L, desorption is stopped, a pregnant solution is obtained and then electrolyzed, when the gold concentration is smaller than or equal to 0.2 mg / L, electrolysis is stopped, scraping is conducted, and gold mud is obtained, and (4) smelting and aftertreatment are conducted, the gold mud is smelted and subjected to aftertreatment, and gold is obtained.The process has the advantages of being small in cyanide consumption and the like.

The invention relates to a process for degrading thiocyanate radicals in carbon leaching tailing wastewater by a plug flow type aerobic sludge method. A process for degrading thiocyanate radicals in carbon leaching tailing wastewater by a plug-flow aerobic sludge process comprises the following steps: (1) pretreatment: adding an iron-containing agent into the carbon leaching tailing wastewater to carry out a primary cyanide breaking reaction, after the reaction is finished, settling by a thickener 1, carrying out filter pressing, and separating out filter pressing residues and filter pressing liquid; (2) carrying out multi-stage buffer and sedimentation treatment on the press filtrate to obtain overflow water; (3) introducing the overflow water into a plug flow type aerobic aeration tank, and introducing a compound flora to carry out biochemical reaction; and (4) after the reaction is finished, precipitating the water in the plug-flow aerobic aeration tank to obtain supernate and bottom sludge. According to the process for degrading the thiocyanate radicals in the carbon leaching tailing wastewater by the plug flow type aerobic sludge method, the wastewater treatment effect and the treatment capacity can be greatly improved through the treatment mode of pretreatment, multi-stage buffering and biodegradation, gold recovery is achieved, and great economic benefits are achieved.

This invention provides a method for preparing a tandem catalyst and its application in degrading organic matter in wastewater, belonging to the field of wastewater treatment technology. The tandem catalyst is prepared by co-precipitation of ferrous chloride, ferric chloride, and aluminum nitrate, followed by grinding and calcination with high-temperature kerosene and activated carbon. The tandem catalyst is then applied to degrade organic matter in wastewater. The tandem catalyst prepared by this invention comprises a hierarchical porous carbon support and a co-precipitate of iron(III) oxide and aluminum(III) oxide supported on the surface of the hierarchical porous carbon support. Using hierarchical porous carbon as the support and aluminum(III) oxide and iron(III) oxide in series as the catalyst facilitates the ozone decomposition of organic matter. The tandem catalyst of this invention can effectively degrade organic matter, achieving a degradation rate of over 95% for both total cyanide and ammonia nitrogen.

The application provides a method for recovering valuable metals and cyanide in cyanide tail liquid based on pulse current diaphragm electrolysis, and belongs to the field of wastewater treatment, wherein a diaphragm electrolysis device is assembled to separate an anode chamber and a cathode chamber by an ion exchange membrane; an alkaline electrolyte solution is added into the anode chamber, and a cyanide tail liquid to be treated is added into the cathode chamber; a single pulse current is used for electrolysis reaction, and the cathode chamber is continuously aerated; after the reaction is completed, the cathode electrolyte is determined to calculate the cyanide recovery rate and the valuable metal recovery rate. The application can efficiently, lowly and selectively recover valuable metals in the cyanide tail liquid under alkaline conditions, and can effectively recover cyanide at the same time, overcomes the limitations of the traditional electrolysis method, and has important economic and environmental significance.

The invention discloses a preparation method of an arfamarana key intermediate, which comprises the following steps: carrying out nucleophilic addition reaction on a compound I and 1-[3-chloro-5-(trifluoromethyl) phenyl]-2, 2, 2-trifluoroethanone under the action of an organic solvent A and alkali to obtain a compound II; dissolving the compound II in an organic solvent B, adding concentrated sulfuric acid, carrying out intramolecular dehydration and cyanogen hydrolysis, and after the reaction is finished, cooling to room temperature for crystal growing to obtain a compound III; dissolving the compound III in an organic solvent C, carrying out intramolecular cyclization and ester hydrolysis reaction on the compound III and hydroxylamine hydrochloride under the action of a certain amount of sodium hydroxide aqueous solution, and after the reaction is finished, collecting a water phase and adjusting the pH value of the water phase, so as to obtain the key intermediate of arfampanaga. The reaction in each step has a high conversion rate, the purity of the prepared arfamarin intermediate is high, and powerful support and guarantee are provided for preparation of high-purity arfamarin.

Methods and systems for synthesis using an underwater electric arc. Such methods and systems form an electrical arc between an anode and a cathode positioned under water or within an aqueous mist and introduce an added material into the vicinity of the electrical arc. The formation of the electrical arc in the vicinity of the added material facilitates synthesis of chemical products from the added material. Such synthesized chemical products include ammonia, hydrogen, cyanide, and hydrogen cyanide.

The invention relates to an extraction agent and an extraction method, and relates to the technical field of wet extraction of industrial solid waste, and the extraction agent comprises the following components in parts by mass: an extraction main agent, an anti-impurity stabilizer and an extraction aid; the extraction main agent comprises di (2-ethylhexyl) phosphate and mono (2-ethylhexyl) phosphate, the impurity-resistant stabilizer comprises an imidazoline derivative, a triazine derivative and dimethyl methylphosphonate, and the extraction assistant comprises isooctyl alcohol; the extraction method comprises the steps of ash ball preparation, impurity removal, extraction and the like. According to the extraction agent and the extraction method, interference impurities such as trace heavy metal ions, sulfides and cyanides generated due to component fluctuation in the purified ash of the calcium carbide furnace are selectively chelated, the impurities are prevented from being combined with the extraction main agent, and then the anti-interference stability of the extraction agent under the condition that the impurity content of the purified ash of the calcium carbide furnace fluctuates is improved; and the control difficulty in the production process is reduced.

The utility model discloses equipment for extracting reacted o-chlorobenzyl cyanide, and relates to the technical field of chemical extraction. The device comprises an extraction tank, a driving assembly is erected above the extraction tank and comprises a driving motor erected at the top of the extraction tank, a fixing frame is arranged on the peripheral side wall of the bottom of the extraction tank, the fixing frame comprises a bottom frame arranged at the bottom of the extraction tank and an erecting plate welded to the upper portion of the bottom frame, and a top frame is further fixedly installed at the top of the erecting plate; the base makes contact with the bottom side wall of the extraction tank through a damper, a fixing assembly is further arranged on the peripheral side wall of the base, and the base is connected with the bottom frame through the fixing assembly. According to the utility model, the damper is used for not only relieving the vibration generated when the extraction tank works, but also reducing the vibration transmitted to the base by the extraction tank, and the fixing frame and the extraction tank in the fixing frame are fixed on the base or other positions of a production workshop by using the fixing assembly capable of changing the fixing position and the length of the fixing assembly.

This invention relates to the field of mineral processing technology, specifically to an environmentally friendly copper-molybdenum separation inhibitor, its preparation method, and its application. The method includes: mixing starch and formamide, stirring at room temperature, cooling in an ice-water bath at -5°C, slowly adding chlorosulfonic acid at this temperature to initiate a sulfonation reaction, neutralizing to pH 7-8 with sodium hydroxide solution after the reaction, adding anhydrous methanol to precipitate the product, and washing and drying to obtain the sulfonated anionic starch polymer DGSS. The inhibitor is applied to the flotation separation of copper-molybdenum mixed concentrates, combined with a closed-circuit process of one roughing, one scavenging, and four cleaning stages, employing a gradient reagent reduction and staged kerosene replenishment system from roughing to cleaning. This allows for selective inhibition of copper sulfide minerals such as chalcopyrite at extremely low dosages, with minimal impact on the floatability of molybdenite. It completely avoids the use of toxic substances such as cyanide, Knox reagent, or sodium sulfide, exhibiting good selectivity, low reagent consumption, environmental friendliness, and a simple preparation process that is easy to industrialize.

The present application relates to a kind of coking wastewater advanced treatment method and system, method includes: the water quality characteristics of coking wastewater are pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler;Coking wastewater is sent into biochemical pool and carries out biochemical reaction, and modified polyurethane suspended filler is placed in biochemical pool;The effluent of biochemical pool is sent into electro-catalytic oxidation device and carries out electrolysis reaction, and electro-catalytic oxidation device uses modified anode electrode as anode electrode, and uses graphite electrode as cathode electrode;The effluent of electro-catalytic oxidation device is sent into filler adsorption tower and carries out adsorption treatment, and modified fly ash filler is placed in filler adsorption tower.The present application is pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler for coking wastewater advanced treatment for the water quality characteristics of coking wastewater, can economically and efficiently reduce the content of TOC, total fluorinated alkyl compound and total cyanide in coking wastewater.

This invention provides a method for synthesizing the anti-AIDS drug enovirine. This invention belongs to the field of pharmaceutical preparation technology. The synthesis method includes the following steps: (1) SM1 compound reacts with Grignard reagent and then reacts with SM2 compound to obtain compound III; (2) Compound III undergoes oxidation reaction to obtain compound II; (3) Compound II undergoes demethylation reaction under the action of demethylation reagent to obtain compound I; (4) Compound I undergoes ethylation reaction to obtain enovirine. The synthesis route of this invention effectively avoids the use of highly toxic cyanide reagents and expensive heavy metal catalysts. At the same time, the reaction conditions of this route are simple and mild, with high yield, and have excellent industrialization prospects.

The invention discloses a tetrazine probe synthon and a preparation method and application thereof.The preparation method comprises the following steps that under the inert atmosphere, diethyl cyanomethylphosphonate, 3-hydroxypropionitrile, 3-mercaptopropionic acid and hydrazine hydrate are mixed and then react at the room temperature, a sodium nitrite solution is added after the reaction is finished, then acid is continuously added till the reaction system reaches acidity, and a tetrazine probe synthon product is obtained; continuously reacting to obtain an intermediate; and dissolving the intermediate in a solvent in an inert atmosphere, adding triethylamine, slowly adding methanesulfonyl chloride, and reacting at room temperature to obtain the tetrazine probe synthon shown in the formula I. The invention further discloses a preparation method of the tetrazine probe synthon. The tetrazine probe synthon provided by the invention can perform series Heck reaction and HWE reaction, so that controllable combination of functional groups on two sides of a tetrazine coupling probe is realized under mild reaction conditions, and the functional groups on two sides are designed according to actual requirements to regulate and control photophysical properties of the probe. A brand new way is provided for developing a high-performance biological orthogonal fluorescent probe.

The invention relates to the field of polyacrylate photoresists, in particular to a photoresist film-forming resin raw material and a preparation method thereof.The preparation method comprises the steps that cyclopentadiene is dropwise added into a mixed solution of alpha-bromomethyl acrylate and a solvent, the temperature is controlled, a reaction is conducted for 4 h, and 5-bromodicyclohept-2-ene-5-carboxylic acid methyl ester is prepared; the preparation method comprises the following steps: adding alkali into 5-bromo dicycloheptyl-2-ene-5-carboxylic acid methyl ester, and hydrolyzing at 20-30 DEG C for 2 hours to obtain a hydrolysis product; the hydrolysis product is subjected to epoxidation and hydrolysis with hydrogen peroxide under the condition of glacial acetic acid, and 1-bromine-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is obtained; according to the method, 1-bromo-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is cyanided by cuprous cyanide to prepare the 1-cyano-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone monomer, and the method has the advantages that the raw materials are convenient and easy to obtain, the route is short, the reaction conditions are relatively mild, the operation safety is relatively high, the total yield is remarkably improved, and the like.

This invention provides a water quality monitoring method for treated water that confirms that the treated water, after coagulation and sedimentation treatment of COD / phosphorus / nitrogen / cyanide in collected dust (raw water), meets water quality standards, predicts deterioration in treatment efficiency during coagulation and sedimentation treatment, enables early detection of abnormal water, and facilitates rapid response to abnormal water. [Solution] A water quality monitoring method for treated water, comprising: a measurement step for automatically measuring the amount of COD / phosphorus / nitrogen / cyanide in treated water; a coagulation-sedimentation step for obtaining treated water by circulating raw water containing coagulated material including copper, iron, etc., and performing mixing, coagulation, and sedimentation treatment in that order; a sampling and analysis step for collecting an analytical sample, in which a portion of the raw water in a mixing tank is intermittently separated while it is circulating, a portion of the separated raw water is injected under pressure into the cylinder of a cylindrical ceramic filter which is a porous material, a portion of the filtered water obtained is taken out, and the filtered water is automatically introduced into an analytical device as an analytical sample for measuring the amount of nitrogen, etc. in the raw water, and the amount of nitrogen, etc. in the sample is automatically measured; and a control step for controlling the operating conditions of the coagulation-sedimentation step using the measured values ​​obtained in the analysis step.

The utility model belongs to the technical field of electroplating liquid, and particularly relates to a cyanide-free electroplating liquid mixing device which comprises a mixing barrel, a servo motor is fixedly mounted at the top of the mixing barrel, a rotating shaft is fixedly mounted at the output end of the servo motor, and a main gear and a first spiral blade are fixedly mounted on the surface of the rotating shaft. A servo motor drives a main gear and a first spiral blade to rotate, the main gear is in meshed connection with an auxiliary gear, and the auxiliary gear is in meshed connection with a gear ring, so that the gear ring and the first spiral blade move in opposite directions, then a stirring rod is driven to rotate, cyanide-free electroplating liquid is conveyed upwards through the first spiral blade, and then the cyanide-free electroplating liquid flows down from the upper portion of a conveying cylinder; the cyanide-free electroplating liquid in the mixing barrel is automatically and circularly stirred, sediments in the electroplating liquid are rubbed into pieces in cooperation with a stirring rod and a grinding rod, the mixing effect is effectively improved, a driving motor drives a second spiral blade to rotate, the electroplating liquid can be conveyed to a discharging pipe to be discharged, and the device is high in practicability.

The invention belongs to the technical field of synthesis of pesticide intermediates, and discloses a preparation method and application of indazole carboxylic acid. The preparation method of the indazole carboxylic acid comprises the following steps: (1) cyanation reaction: reacting a brominated indazole compound with cuprous cyanide in an organic solvent in a protective gas atmosphere to obtain a cyano indazole compound; and (2) hydrolysis reaction: hydrolyzing the cyano indazole compound prepared in the step (1) to obtain indazole carboxylic acid. The preparation method disclosed by the invention is mild in condition, low in cost, safe to operate and environment-friendly. The use of highly toxic chemical raw materials and expensive raw materials is avoided, and the yield of the target product is high.

The invention relates to the technical field of hydrocyanic acid production, in particular to a high-yield hydrocyanic acid chemical process which comprises the following steps: 1) respectively pretreating ammonia gas, natural gas and air, mixing according to a ratio, and inputting into a hydrocyanic acid reactor; (2) carrying out oxidation reaction on the raw material gas under a certain condition under the catalytic action of a platinum alloy net to prepare ammonia-containing hydrocyanic acid gas; 3) performing ammonia removal treatment on the hydrocyanic acid gas to obtain purified hydrocyanic acid gas and an ammonium sulfate solution containing cyanide; 4) carrying out cyanogen removal treatment on the ammonium sulfate solution to obtain mixed gas containing hydrocyanic acid and a cyanogen-free ammonium sulfate solution; according to the method, the area of a platinum alloy net capable of being contained is increased, the reaction area playing a catalytic role is increased, then the reaction efficiency is improved, and the single-line productivity is improved.

The invention discloses a cyanide breaking process device based on spectrum on-line monitoring, which comprises a spectrum on-line monitoring module, a cyanide breaking reaction tank group, a reaction control system, an intelligent decision-making module and an executing mechanism, and is characterized in that the spectrum on-line monitoring module is composed of a micro multichannel spectrum sensor provided with an array type LED light source and an independent light intensity feedback circuit; a bypass circulating pipeline is connected with the main treatment system and a filter is arranged to eliminate the interference of suspended matters; the cyanide breaking reaction tank group comprises an alkaline oxidation tank and an acid decomposition tank which are connected in series, each tank body is internally provided with a stirrer, a liquid level monitoring unit, a temperature control unit and a stirrer driving unit, the acid decomposition tank is provided with a PH sensor, and the intelligent decision module integrates an edge calculation unit and a cloud database, receives spectral data in real time and outputs a control instruction; the execution mechanism is composed of a sodium hypochlorite metering pump connected with an intelligent decision-making module, a PH regulator adding device and a central control unit containing a safety interlocking module.

The utility model relates to a multi-metal low-grade flotation tailing metal recovery system which comprises a stirring barrel, a discharging port of the stirring barrel is connected to a feeding port of a hydrocyclone through a sand pump, a sand settling port of the hydrocyclone is connected to a feeding port of a ball mill, and a discharging port of the ball mill is connected to a feeding port of a sand pump pool. An overflow opening of the hydrocyclone is connected to a feeding opening of the roughing flotation machine, a concentrate discharging opening of the roughing flotation machine is sequentially connected to the first flotation classificator, the second flotation classificator and the third flotation classificator, and a concentrate discharging opening of the third flotation classificator is connected to the first cyaniding carbon pulp system. According to the recovery system, concentrate and tailings of raw ore are subjected to roughing separation, then the roughing concentrate and the roughing tailings are subjected to three-stage concentration and two-stage scavenging, valuable metal is enriched in the concentrate as far as possible, the concentrate grade is improved, the scavenged tailings are further enriched and recovered through two-stage magnetic separation, and the recovery efficiency is improved. And finally, valuable metals in the concentrate are efficiently recovered by combining a cyaniding carbon slurry system.