57results about How to "Reduce solid waste discharge" patented technology

The invention discloses a processing technology of chlorination process tailing slag extracted titanium and belongs to the metallurgical field. The invention provides an online dechlorination technology of chlorination process tailing slag extracted titanium. The technology includes the following steps that firstly, the chlorination process tailing slag extracted titanium enters a beating tank through a slag discharge port of a chlorination furnace, and the temperature of the chlorination process tailing slag extracted titanium is 400-550 DEG C; secondly, the chlorination process tailing slag extracted titanium and water in the beating tank are stirred and beaten for form sizing agents, and the mass ratio of the water to the slag in the sizing agents is controlled to be 3.2-4:1; thirdly, by means of a slurry pump, the sizing agents are conveyed to a slag yard through a pipeline, and therefore integration of dechlorination and tailings conveying can be achieved; fourthly, the beaten tailing slag extracted titanium naturally settles in the slag yard till the water content of tailings is 12-20% and the chlorine ion content is lower than 0.3%; fifthly, the tailings where natural settlement is performed directly enter a rotary kiln through a belt and are calcinated for 20-40 min at the temperature of 600-700 DEG C. By means of the online dechlorination technology, the chlorine ion content of the chlorination process tailing slag extracted titanium is smaller than or equal to 0.08%.

The invention relates to a method for producing tetracycline by fermentation of streptomyces aureus. The method comprises the following steps: slant spore culture, seed culture and fermentation culture of the streptomyces aureus, and is characterized in that dextrin, sucrose, corn pulp, hydrolyzed soybean meal and other medium-effect carbon-nitrogen sources are adopted to replace original late-effect carbon-nitrogen sources; by reducing the contents of starch and bean flour in an original fermentation culture medium and combining with a formula of a mixture in the fermentation process and adjustment of a replenishing method and placing part of the nitrogen sources in the fermentation culture medium into material replenishment in the fermentation process, the concentration of the culture medium in the fermentation process is effectively controlled, the oxygen dissolution condition in the early stage of fermentation is improved, the final residue of the culture medium of fermentation is controlled by material replenishment, the material consumption is reduced, and the emission of solid wastes is reduced; the metabolism velocity in exponential growth phase in the fermentation process of the tetracycline is effectively controlled, the abnormal situations that a fermentation solution turns red and becomes sour and the like in the fermentation process are reduced, and the fermentation level is improved.

The invention provides a gold-rich beneficiation method for gold ores and gold waste ores. The gold-rich beneficiation method comprises the following steps that 1, coarsely crushing the waste ores until the maximum particle size is less than 120 mm, so that the coarse crushed ores are obtained; 2, the coarse crushed ores are screened to obtain first gold-rich ores in the particle size below 30 mmand to be sorted ores with the particle size more than 30 mm; 3, the to be sorted ores enables a X-ray sorting machine, the qualitative and quantitative analysis are carried out on the elements in theores to be sorted according to the wavelength and intensity of X rays, and the waste ores and second gold-rich ores are obtained after separating ; 4, the first gold-rich ores and the second gold-rich ores are finely crushed until the particle sizes are smaller than 12 mm, and ore grinding and grading is carried out on the obtained fine products; and 5, the flotation recovery ores are carried outon the obtained ore grinding grading products, and gold concentrate products and tailings are obtained by flotation. The method disclosed by the invention can be used for effectively improving the gold grade of the ores to be grinded in the plant, the ore grinding grading amount is reduced, the ore quantity of the sorting operation is reduced, and the discharge of the tailings is reduced.

The invention relates to a method for co-production of a chemical synthetic fertilizer by industrial calcium products, and belongs to the field of production of agricultural fertilizers. The method comprises the following steps: preparing phosphorite powder into ore pulp by using a raw material slurry method, reacting the ore pulp with nitric acid, and filtering; feeding filter residues to a compound fertilizer workshop to produce a nitrohumic acid compound fertilizer; adding sodium nitrate in the filtrate to remove fluoride; centrifugally dehydrating; drying the filter residues to prepare sodium fluosilicate; adding ammonium sulfate, potassium sulphate or potassium carbonate in the filtrate to deposit calcium; then filtering; preparing the industrial calcium products from the filter residues; and neutralizing, concentrating, guniting, drying, cooling, enveloping, metering and packing the filtrate to obtain the chemical synthetic fertilizer.

The invention discloses a method for producing parachlorotoluene through continuous chlorination of methylbenzene. The method comprises the following steps: with an active molecular sieve as a catalyst, performing continuous chlorination on methylbenzene in a static bed, wherein a ratio of parachlorotoluene to o-chlorotoluene in the chlorination products is 1.2-6.0; performing aeration and distillation separation on the chlorination product to obtain high-purity parachlorotoluene, and enabling the separated methylbenzene and raw material methylbenzene to enter the static bed together so as toperform continuous chlorination; periodically reproducing the catalyst in the static bed; and alternately using and activating two groups or more than two groups of static beds. According to the method disclosed by the invention, continuous chlorination production of methylbenzene is realized, the ratio of parachlorotoluene to o-chlorotoluene is 1.2-6.0, the catalyst can be repeatedly used, the production cost is reduced, and solid waste emission is reduced.

The invention discloses a preparation method of a palbociclib intermediate, which comprises the following steps: by using 2-chlorine-8-cyclopentyl-5-methylpyrido [2, 3-D] pyrimidine -7 (8H) -ketone as a raw material, carrying out NBS bromination and cooling crystallization centrifugation under the catalysis of oxalic acid and acetic anhydride to obtain 6-bromine-2-chlorine-8-cyclopentyl-5-methylpyrido [2, 3-D] pyrimidine -7 (8H) -ketone; meanwhile, waste liquid generated in the preparation process is fully reutilized, three wastes are reduced, and the preparation method which is high in quality, low in cost, environmentally friendly and suitable for industrial production is provided.

The invention discloses a method for decomposing a phosphate rock acidolysis liquid by nitric acid to remove calcium byproduct alpha high-strength gypsum. The method comprises: decomposing phosphoriteby nitric acid, filtering out acid insoluble substances, partially neutralizing the acidolysis liquid, regulating and controlling the concentration of calcium ions in the acidolysis liquid, adding the acidolysis liquid into a crystallization tank containing a mixed solution of additional phosphoric acid and ammonium sulfate, controlling the reaction temperature to be 50-70 DEG C and the reactiontime to be 0.5-2 hours to firstly generate dihydrate gypsum, then, making the reaction slurry flow into a crystal transformation tank, and raising the temperature to 95 to 110 DEG C for reacting for aperiod of time so that an alpha-type high-strength gypsum product can be produced as a byproduct. According to the invention, the acidolysis liquid can be used for producing products such as fine phosphate, high-water-solubility phosphate fertilizer and the like, meanwhile, calcium resources in the acidolysis liquid are converted into an alpha high-strength gypsum product, solid waste phosphogypsum is changed into product phosphogypsum, environmental risks caused by the fact that a large amount of solid waste phosphogypsum is produced as a byproduct in the ammonium phosphate industry are eliminated, the phosphorus compound fertilizer industry is promoted to adjust the product structure, solid waste emission is reduced, and sustainable development of the phosphorus chemical industry is promoted.

The invention discloses a method for converting 5-aldehyde vanillin to o-vanillin. The method is characterized in that a byproduct 5-aldehyde vanillin generated in the vanillin production process through crystallization, distillation or rectification, separation and recovery undergoes catalytic aldehyde removal under a reduced pressure condition to convert to o-vanillin, vanillin and guaiacol. The method realizes the reduction of the discharge of solid wastes, realizes the recycle of the solid wastes generated in the production of vanillin through a glyoxylic acid method, and improves the economic benefit.

The invention belongs to the field of oil field oil sludge resourceful treatment, especially discloses reclaimed rubber prepared from oil field oil sludge as a main raw material, and also discloses a production method. The reclaimed rubber prepared from the oil field oil sludge is composed of the raw materials by the mass percentage: 50%-65% of oily sludge, 5%-20% of a waste tire rubber powder, 20%-40% of clay, 0.1%-0.4% of an activator 420, 0.1%-0.3% of ethylene tar, and 0.1%-0.3% of alkyl phenol disulfide. According to the reclaimed rubber prepared with oil field oil sludge, through formula optimization design, the content of the oily sludge is increased significantly, the consumption of the oil field sludge is increased, and the oil field oil sludge resourceful treatment effect is increased by 20% or more; with use of the waste tire rubber powder, the use amount is only 5%-20% and is significantly reduced, and the production cost is saved; the reclaimed rubber has relatively short reclaiming reaction time and has high degree of desulfurization, and the reclaimed rubber properties all reach national corresponding reclaimed rubber standards.

The invention discloses a method for preparing synthetic gas from C1 chemical fuel in a multivariate conjugation manner. The method comprises the following steps: 1, baking in an oven; 2, introducingC1 gas-state fuel and C1 solid-state fuel slurry into a gasification furnace respectively to be mixed with an oxidant, and reacting to generate crude synthetic gas, wherein a reaction cavity is of a flat and long gourd shape, a relation between the diameter d of a fine neck part of the reaction cavity and the diameter D of the thickest part of a web part is as follows: d=0.382D, and the ratio of axial heights of upper and lower sections of chambers of the reaction cavity taking the fine neck part as the boundary is 1 to 3; and 3, quenching the crude synthetic gas and unreacted solid residues,and discharging the crude synthetic gas with overheated gas. According to the method disclosed by the invention, the reaction cavity of the gasification furnace and a spraying nozzle are designed andan actual reaction space of the reaction cavity of the gasification furnace is matched with a flow field for reaction of raw materials, so that C1 raw materials are mixed in the reaction cavity in a high-strength manner and are in sufficient contact; the mass transfer effect is improved, and the high-concentration crude synthetic gas taking CO and H2 as main raw materials is obtained; and the utilization efficiency of a C1 fuel resource is improved.

The invention discloses a composition for preparing ultralight ceramsite, which comprises the following components in parts by weight: 60-100 parts of shale, 0-40 parts of fly ash and 2-20 parts of jarosite slag. 0.22% of silicon carbide is also added on the basis of the total weight of the shale, the coal ash and the jarosite slag. By matching the components, effective utilization of waste resources such as shale and jarosite slag is realized, solid waste discharge is reduced, ultralight ceramsite with stacking density below 400kg/m < 3 > and low water absorption can be obtained, the raw material cost is low, the added value of the product is high, and high-valued utilization of wastes is realized. The invention also discloses ceramsite prepared by taking the composition as a raw materialand a preparation method of the ceramsite.

The invention discloses a method for recovering steel ladle cast residues by using a converter, and belongs to the technical field of production of medium-thickness plates. The method includes the steps of proportioning converter raw materials, wherein the raw materials comprise 100-102t of molten iron, 3-5t of plate-edge steel scraps and 3-5t of solid steel ladle cast residues; adding 500-1000kg of lime and 2000-3000kg of limestone in a first batch material when blowing is started, carrying out blowing for 3-6min, and adding 2000-2500kg of the limestone into a second batch material; and adopting bottom blowing operation in the blowing process, wherein the gun position is 1.2-1.3m, and the final temperature is controlled to be 1650-1670DEG C. The method for recovering the steel ladle cast residues by using the converter has the advantages that solid waste emission is reduced, and the yield of metal materials is increased, the utilization rate of slagging agents is increased, and the smelting cost is reduced.

The invention relates to pressurized moving bed oxygen thermal method calcium carbide gas integrated production equipment. The equipment comprises a calcium carbide gasifier, a first gasifier body isarranged above the waist of a gasifier body of the calcium carbide gasifier, and a second gasifier body is arranged below the waist. The top of the first furnace body is of a frustum body structure, and a distribution cylinder with a hyperbolic section is longitudinally arranged in the middle of the frustum body structure; and an annular gas collection chamber is formed by a cavity between the material distribution cylinder and the inner wall of the frustum body structure. The bottom of the gas collecting chamber is communicated with the furnace chamber of the first furnace body, and the top of the gas collecting chamber is provided with a gas collecting chamber outlet for outputting calcium carbide furnace gas to the outside of the furnace body. The plurality of oxygen nozzles are arranged around the waist of the furnace body. A hearth for accommodating liquid calcium carbide is arranged in the second furnace body; a calcium carbide outlet is formed in the second furnace body; a heavycalcium carbide outlet is formed in the bottom of the second furnace body. According to the invention, fully-closed safe operation of calcium carbide production can be realized, raw material and power consumption is reduced, carbon emission is reduced, and the environment is improved.

The invention relates to an environment-friendly process for quizalofop-p-ethyl production. The environment-friendly process is characterized by comprising the following steps: firstly enabling hydroquinone to react with sodium hydroxide to prepare sodium salt of the hydroquinone, then reacting with 2,6-dichloroquinoxaline to obtain 4-(6-chloro-2-quinoxalinyloxy) and reacting with ethyl lactate p-toluenesulfonate to obtain the quizalofop-p-ethyl; then performing alkaline hydrolysis and acidification on produced quizalofop-p-ethyl butter and recovering 6-chloro-2-quinoxalinone. The synthetic process has the advantages that as the reaction and the post-treatment are performed in an organic solvent, the alkalinity of a reaction system is reduced, the defect that impurities are easy to generate due to too strong aqueous phase reaction alkalinity is overcome, and the hydrolysis of 2,6-dichloroquinoxaline as a raw material is reduced, so that the content of 4-(6-chloro-2-quinoxalineoxy) phenol reaches 98 percent or above, and the yield reaches 92 percent or above; 6-chloro-2-hydroxyquinoxaline in the quizalofop-p-ethyl butter is recovered, so that the solid waste discharge amount is reduced, the environment is protected, and the intermediate cost of the quizalofop-p-ethyl is reduced.

The invention discloses a method for preparing diisobutyl phthalate. The method comprises the following steps: 1, preparing a magnetic nanoparticle-supported acidic ionic liquid used as a catalyst; and 2, preparing the diisobutyl phthalate: carrying out refluxing dehydration condensation on phthalic anhydride and isobutanol under the catalysis of the magnetic nanoparticle-supported acidic ionic liquid for 3-6 h to obtain a diisobutyl phthalate reaction solution, cooling the reaction solution to room temperature, filtering the cooled reaction solution, adsorbing the obtained filtrate I by a solid alkali, performing filtration to obtain a filtrate II and a filter cake respectively, and carrying out reduced pressure dealcoholysis on the filtrate II to obtain the diisobutyl phthalate. The magnetic nanoparticle-supported acidic ionic liquid is used as the catalyst to achieve catalytic synthesis of the diisobutyl phthalate, so the method has the characteristics of high catalysis efficiency,easiness in recovery and reuse of the catalyst, simple process and less waste water discharge.

The invention belongs to the technical field of wastewater treatment, and in particular relates to a process and system for continuously removing ammonia nitrogen light component organic matter and salt. A method for removing ammonia nitrogen and desalination of waste water, characterized in that it comprises the following process steps: step 1: distillation in a rectification tower; step 2: primary evaporation; step 3: secondary evaporation; ... Step n: n-stage evaporation: Step n+1: final evaporation. The invention relates to an equipment system used in the ammonia nitrogen removal and desalination process of waste water, which comprises a rectification tower kettle, a primary evaporation tank, a secondary evaporation tank and an n-stage evaporation tank. Beneficial effects of the present invention: 1) recovery of light component organic matter in waste water, especially ammonia water, and high purity; 2) final salt in waste water is finally converted into solid powder, reducing solid waste discharge; 3) light and light removal Re-coupling reduces the energy consumption of the device by 40% to 70%; 4) After the waste water is delightened and desalted, the clean water obtained can be used as process water and returned to the system for recycling, reducing water consumption.

The invention provides a method and a system for producing glass fiber products by using a liquid deslagging boiler, and relates to the field of waste gas and solid waste treatment. According to the system and the method for producing the glass fiber products through the liquid slagging boiler, the total discharge amount of solid waste of a power plant can be reduced, waste heat of slag liquid can be effectively utilized, meanwhile, steam, pressurized air, electric energy, circulating water and other process products generated by the boiler of the power plant are efficiently utilized, and the production cost is reduced. The solid wastes of the power plant are converted into industrial products by utilizing equipment of the boiler. Compared with a traditional method, the energy utilization efficiency is improved, solid waste emission of a power plant is reduced, pollutant emission is reduced, and economic benefits and social benefits of the power plant are increased.

The invention relates to a casting process method for improving sand strength of casting sand grains. The casting process method comprises the following steps of 1, preparing raw materials, wherein the raw materials comprise molding sand and a reinforcing agent; 2, adding the raw materials to a casting sand mixing device, adding sand, adding a reinforcing agent, adding the reinforcing agent in a manner of powder or powder concentration into a liquid state, and fully stirring and uniformly mixing the raw materials; 3, adding an adhesive and a curing agent, fully uniformly mixing, then molding and compacting in a sand box, and arranging an overflow port and an air outlet hole on the sand mold; 4, carrying out mold removal after self-hardening, and performing modification; and 5, carrying outbrush coating, box closing, hot air drying, pouring, sand falling and recycling. According to the casting process method, the reinforcing agent material such as the nanoscale refractory material is used for carrying out sand mixing molding production through compatibility with a traditional casting sand production line and equipment, so that the purpose of greatly improving the strength of the sand mold on the premise of not additionally increasing the adding amount of the resin is achieved.