21results about How to "Compact process" patented technology

The present application belongs to the field of non-ferrous metal dressing process, and relates to a grinding-flotation short process separation method for processing fine molybdenite. The process uses a high-pressure roller mill and a tower mill crushing and grinding process to replace the fine crushing and two-stage continuous ball milling operation in the traditional crushing and grinding process, and uses a flotation column to replace a flotation machine for flotation operation, thereby simplifying the production process flow of molybdenite. The present application has the advantages that the high-pressure roller mill and the tower mill change the crushing and grinding mode of the ore, significantly reduce the crushing and grinding energy consumption, and more effectively protect the flaky structure of molybdenite. The particle size distribution of the grinding product is reasonable, and the amount of fine and micro-fine particles (-20 μm) is reduced, thereby creating good conditions for the flotation operation. The flotation column is used for flotation, compared with the flotation machine, the recycling of middling slurry is reduced, the fine molybdenite that has been dissociated is fully recovered, and the recovery rate of molybdenite is improved. In addition, the flotation column flotation is beneficial to obtaining high-grade concentrate product, and improves the separation index and economic benefits of molybdenite.

The invention belongs to the technical field of industrial solid waste recycling and environmental protection, discloses a red mud total recycling and innocent treatment method based on material internal circulation, and solves the problem of high dependence degree on external materials in the current red mud treatment process. The method comprises the following steps: calcining red mud and then performing acid leaching; adding sodium carbonate while heating the pickle liquor to co-precipitate iron and aluminum in one step, and collecting CO2; washing the precipitate to obtain iron-aluminum concentrate and a sodium chloride solution; cO2 is introduced into a NaOH solution to prepare sodium carbonate; the sodium chloride solution is converted into NaHCO3 and NH4Cl through a Hou's alkali preparation method, and NaHCO3 is calcined to obtain Na2CO3 and CO2; regenerating NaOH from the Na2CO3 solution through a causticization method; and extracting silicon from acid leaching residues by using regenerated NaOH to produce white carbon black. The method disclosed by the invention fundamentally avoids the generation of high-salinity wastewater, synchronously and efficiently recovers iron, aluminum, silicon and sodium resources, and has remarkable economic and environmental benefits.

This invention belongs to the field of oil and gas field wastewater treatment technology, and discloses a treatment system and method for oil and gas field fracturing flowback fluid. The system comprises a de-gelling and flocculation system, a microbubble ozone system, a reverse osmosis interception system, and a bio-enhanced degradation system connected in sequence. The de-gelling and flocculation system receives the raw water to be treated and, through the synergistic effect of chemical de-gelling and physical swirling fields, separates and removes oily substances and suspended solids from the raw water, forming de-gelling permeate. The microbubble ozone system is used to deeply oxidize the de-gelling permeate, forming oxidation permeate. The reverse osmosis interception system is used to desalinate and deeply purify the oxidation permeate, forming reverse osmosis permeate. The bio-enhanced degradation system is used to degrade biodegradable pollutants in the reverse osmosis permeate to obtain system effluent. This invention achieves the comprehensive goal of a compact process and stable effluent that meets standards for reuse or discharge through a closed-loop treatment path of progressive pollutant reduction and differentiated purification.

The invention belongs to the technical field of zirconium-niobium alloys, and discloses a heat treatment method for synchronously improving the strength and plasticity of a zirconium-niobium alloy formed by melting a laser powder bed and the performance of a surface ceramic layer. The method comprises the following steps: putting the zirconium-niobium alloy formed by melting in a laser powder bed into a heat treatment furnace, and keeping the temperature of 650-750 DEG C for 10-30 minutes in an atmospheric environment; cooling to 550 to 650 DEG C, and keeping the temperature for 20 to 60 minutes; continuously cooling to 400 DEG C to 500 DEG C, and keeping the temperature for 20 to 60 minutes; and circulating and repeating, and cooling to room temperature along with the furnace. According to the method, strengthening and toughening of the alloy matrix and preparation of the surface high-performance ceramic layer are synchronously achieved, the microhardness of the treated alloy surface is greatly improved, a thick compact oxide layer is formed, the tensile strength loss is reduced to the minimum, the percentage elongation after fracture is greatly improved, and the service life of the alloy is prolonged. The problem that the'strong plasticity 'and the'wear resistance' of the zirconium-niobium alloy in the traditional process are difficult to synergistically improve is solved.

The invention relates to the technical field of metallurgical materials, and particularly discloses a method for refining a functional boron stainless steel sheet structure through large deformation machining. Comprising the following steps that S1, smelting is conducted, specifically, a steel ingot is prepared through a vacuum induction smelting and electroslag remelting duplex technology; s2, sheath forging: carrying out surface treatment on the steel ingot to obtain a blank, filling the blank into a steel sheath for packaging to form a blank with a sheath, and carrying out hot forging on the blank with the sheath to obtain a forged plate with the sheath; s3, sheath rolling: performing multi-pass hot rolling on the forged plate to prepare a hot-rolled thin plate with a sheath; s4, solution treatment: carrying out solution treatment on the hot-rolled sheet to obtain a solution-treated sheet; and S5, surface treatment is conducted, specifically, after a steel ladle sleeve of the thin plate subjected to solution treatment is removed, surface treatment is conducted, and the functional boron stainless steel thin plate with the needed specification and size is obtained. By means of the method, the boron stainless steel sheet which is excellent in mechanical property, uniform in thermal neutron absorption and suitable for being used as a structure / shielding integrated material can be prepared.

The invention discloses a molding process of a mining high-load multifunctional composite material, and relates to the technical field of polymer composite material molding processing, and the molding process comprises the following steps: preparing a surface layer composite master batch and a core layer composite master batch; the surface layer master batch and the core layer master batch are subjected to melt extrusion, and melts extruded by the two single-screw exhaust type extruders are converged into a co-extrusion die head; the metal net is pretreated, the pretreated metal net is guided into a guide-in channel of a co-extrusion die head, the metal net is compositely extruded through the co-extrusion die head, and a composite plate blank is formed; feeding the plate blank into a three-roller calender; feeding the composite plate blank into a slow cooling system; feeding the composite board into an infrared heating embossing system, heating the board, embossing anti-skid lines on the surface layer of the board, and cooling and shaping to obtain a finished product. Air holes and defects caused by exhaust type extrusion and volatile components are thoroughly eliminated through exhaust type extrusion, the mechanical property is remarkably improved, exhaust type extrusion is combined with the precise co-extrusion die head, and it is guaranteed that the thickness of each layer of ABA is uniform, and interface bonding is firm.

The present application belongs to the technical field of metallurgy and mineral processing suspension fluidization roasting, and particularly relates to a system and process for producing nickel by coal-based roasting reduction electric furnace smelting of laterite nickel ore. The system comprises a feeding drying unit, a preheating drying and crushing unit, a heat supply heating unit, a coal-based pre-reduction unit, an electric furnace smelting waste heat recovery unit, a dust removal, powder conveying and desulfurization unit, and the laterite nickel ore is processed by the "dry powder crushing, coal suspension roasting, coal-based pre-reduction, and ore-smelting electric furnace" technology. The present application has strong adaptability to raw materials, can produce high-value products from cheap resources, and adopts multiple energy-saving technologies in the new process to greatly reduce energy consumption and realize efficient use of energy. The present application makes up for the limitations and deficiencies of the traditional RKEF process, can reduce process energy consumption, improve resource recovery rate, provides a new innovative breakthrough direction for efficient utilization of laterite nickel ore resources for smelting nickel-iron alloy, and can greatly improve the economic value of the development and utilization of such resources.

This invention discloses a water-resistant starch adhesive and its preparation method. The adhesive is composed of the following raw materials in parts by weight: 380-420 parts starch, 15-18 parts polyvinyl alcohol, 4-6 parts urea, 0.5-1.5 parts urea-formaldehyde resin, 1-3 parts borax, 10-12 parts sodium hydroxide, and 1000-1200 parts water. In the preparation process, polyvinyl alcohol, urea, and a trace amount of urea-formaldehyde resin are first pre-condensed at 65-75°C under acidic conditions (pH 4.2-4.8) to generate a polyvinyl alcohol-urea condensate. Then, the condensate is combined with starch and other raw materials in a one-pot process to complete gelatinization and final product formulation. This invention uses the polyvinyl alcohol-urea condensate to effectively replace more than 90% of the conventionally used commercial urea-formaldehyde resin, resulting in extremely low free formaldehyde content, a delamination time of 27-28 hours, and an adhesive strength of 850-860 N / m. The overall raw material cost is reduced by approximately 13%, and the process is simple, making it suitable for the production of corrugated cardboard adhesives.

This invention relates to a pyridine-imine type metal complex, its preparation method, and its applications. The pyridine-imine type metal complex is an NNN-pyridine-imine type metal complex or an NN-pyridine-imine type metal complex; its structural formula is shown in Formulas 1-4. The pyridine-imine type metal complex and its preparation method described in this invention, as well as its application in hydrosilylation and silanization reactions, allow for the one-pot synthesis of the desired metal complex. The preparation method is simple and low-cost, eliminating the cumbersome separation steps in traditional two-step methods, significantly reducing reaction time, increasing the maximum yield to over 95%, and exhibiting high catalytic activity and selectivity in hydrosilylation and silanization reactions.

The invention discloses an efficient outdoor dunaliella salina culture system based on brine resources. The efficient outdoor dunaliella salina culture system comprises a brine collection and storage module, a brine pretreatment module, an inoculation and initial culture module and a large-scale outdoor culture module which are communicated in sequence, the brine pretreatment module comprises an original brine buffer pool, a purification pool and a nutritive salt blending pool which are communicated in sequence, a micro-nano bubble generator, a heating device and an electrochemical disinfection device are arranged in the original brine buffer pool, a conveying pipeline with an electromagnetic valve is communicated between the original brine buffer pool and the purification pool, a free chlorine sensor is arranged in the original brine buffer pool, and the nutritive salt blending pool is communicated with the purification pool. The free chlorine sensor is in signal connection with an electromagnetic valve on the conveying pipeline through a controller; an alkaline solution and an interception screen plate are arranged in the purification tank; and a microfiltration device is communicated between the nutritive salt blending tank and the purification tank. By means of module integration and automatic control, the brine pretreatment process is shortened, the equipment cost is reduced, and the system has the all-weather operation capacity and is suitable for large-scale outdoor dunaliella salina cultivation.

This invention discloses an integrated online multi-stage gradient oxidation modification process and production line for carbon black, belonging to the field of carbon black production technology. Based on an oil furnace carbon black production line, this invention sequentially sets up a three-stage gradient oxidation unit: oxygen pre-oxidation via pneumatic conveying pipeline, gas-phase oxidation via vertical fluidized bed ozone-oxygen, and liquid-phase oxidation via a wet granulator with hydrogen peroxide. Each unit can be started and stopped independently and freely combined. The oxidized carbon black can be flexibly produced in multiple forms, including powder, wet granulation, and dry granulation. This invention integrates carbon black production and oxidation modification control, allowing precise control of oxygen-containing functional groups on the carbon black surface. The process flow is compact, with a single unit having an oxidation capacity of up to 60 tons / day. It features low energy consumption, high product stability, and is suitable for large-scale industrial continuous production.

The invention discloses a method and a device for preparing n-heptanoic acid. The device comprises a first mixing device, a second mixing device and a third mixing device, a material inlet of the reaction device is connected with a material outlet of the first mixing device; a material inlet of the first separation device is connected with a material outlet of the reaction device; a material inlet of the second separation device is connected with a material outlet of the first separation device; a material inlet of the first distillation device is connected with a material outlet of the second separation device; a material inlet of the second distillation device is connected with a material outlet of the first distillation device; a material inlet of the second mixing device is connected with a material outlet of the second distillation device; a material inlet of the first reaction rectification device is connected with a material outlet of the second mixing device; a material inlet of the second reactive distillation device is connected with a material outlet of the first reactive distillation device. 1-hexene is used as a raw material, n-heptanoic acid is prepared through the hydromethyl esterification reaction and the reactive distillation hydrolysis technology, the source is wide, and the raw material cost is reduced by 30% or above.

The application discloses a TEC double-face welding device, which comprises a control cabinet, a protective cover is fixedly connected to the upper end of the control cabinet, an air suction pipe connected with an external air source is arranged through the top end of the protective cover, a pusher is fixedly connected to the input end of the protective cover, a preheating assembly is connected to the control cabinet, a supporting assembly is connected to the control cabinet, and a pushing assembly is connected to the supporting assembly. In the application, after the staff places samples, the device starts to operate, so that the samples can be preheated, heated and cooled to complete double-face welding of the samples. Meanwhile, the overall device process is relatively compact, the transfer time is saved, the processing time is further reduced, the overall efficiency of the device is improved, the device can simultaneously process multiple products, the processing time is further reduced, the processing efficiency of the device is indirectly improved, and the production efficiency of the device is improved.

The invention relates to the technical field of edible mushroom production equipment, and discloses an automatic bag cultivation pilose antler mushroom cutting machine which comprises a rack, a main conveying line is installed at an inlet of the front face of the rack, a belt conveying unit installed in the rack is arranged above the main conveying line, and the belt conveying unit extends to the outer side of the rack from the side face of the rack; a band saw cutting mechanism is arranged on the side, located in the rack, of the belt conveying unit and located over the main conveying line. By arranging the main conveying line and the belt output unit and arranging the band saw cutting mechanism at the space intersection of the main conveying line and the belt output unit, automatic cutting of the bag-cultivated velvet antler mushrooms can be achieved, cutting-off and transferring of the bag-cultivated velvet antler mushrooms can also be achieved, the harvesting efficiency of the bag-cultivated velvet antler mushrooms is greatly improved, the labor intensity of workers is reduced, and the labor intensity of workers is reduced. Meanwhile, the contact between a human body and a cutting tool can be reduced, and the safety of production operation is improved.

A fluidized coal-based pre-reduction subsystem and a method for preparing molten iron from laterite nickel ore are disclosed, belonging to the field of laterite nickel ore reduction roasting technology. The system includes a preheating oxidation system, a fluidized coal-based pre-reduction system, a high-temperature molten iron subsystem, and a hot air circulation system; wherein the preheating oxidation system, the fluidized coal-based pre-reduction system, and the high-temperature molten iron subsystem are connected sequentially, and the hot air circulation system connects all systems into a closed loop. The method for preparing nickel-containing molten iron using the above system includes the following steps: 1. Feeding and preheating oxidation operation; 2. Fluidized coal-based pre-reduction operation; 3. High-temperature molten iron subsystem operation. The method for preparing nickel-containing molten iron using the fluidized coal-based pre-reduction-molten iron subsystem has advantages such as no need for coke, low reducing agent consumption, large processing capacity, low power consumption, environmental friendliness, compact process, and high degree of automation.

The application provides an arsenic vapor crystallization device and a control method. The arsenic vapor crystallization device comprises a crystallization cabinet, a plurality of layers of crystallization boxes arranged in the crystallization cabinet, a plurality of groups of crystallization pieces, an outer cylinder and a temperature control device. The lower part of the crystallization box is provided with an air inlet pipeline, and the top end is provided with an air outlet pipeline. The plurality of layers of crystallization pieces are arranged in the height direction to carry arsenic vapor crystal nuclei and adhere to crystals. The outer cylinder surrounds the crystallization box and is provided with a temperature control medium. The temperature control device can independently control at least two temperature control regions of the crystallization box divided in the longitudinal direction, so as to realize precise partition temperature control. The control method adopts a cyclic step logic based on the partition structure, sets a cycle variable M, adjusts the Mth temperature control region to the arsenic vapor crystallization temperature, keeps the remaining regions at the vapor flow temperature, and cyclically switches until the crystallization of all regions is completed. The application realizes directional layered crystallization of arsenic vapor, effectively improves the crystallization efficiency and purity, reduces manual intervention through automatic cyclic control, guarantees the consistency of the crystallization quality, and is suitable for efficient and precise arsenic vapor crystallization production scenes.

This invention discloses a low-temperature instant crosslinking rubber-type cold-resistant polyethylene protective film and its preparation method, belonging to the field of protective film technology. The protective film is prepared by coating a polyethylene base film with a two-component rubber pressure-sensitive adhesive and then crosslinking it at low temperature. Component A is a ternary compound rubber phase, and component B is an aliphatic triisocyanate crosslinking phase, combined with synergistic additives to achieve rapid low-temperature catalytic crosslinking. The preparation process employs a two-component synchronous delivery, static mixing, slot coating, and low-temperature curing at 70-90℃, completing crosslinking in 3-5 minutes, significantly reducing energy consumption. The resulting protective film exhibits excellent initial tack and holding power, shows no brittleness or residue at -30℃, has a gel content of over 91%, and demonstrates excellent low-temperature protective performance. This invention's process is safe, efficient, and suitable for industrial production, meeting the requirements for product surface protection in low-temperature environments.

The application discloses a nitric acid preparation system and method, and relates to the technical field of chemical industry, and can reduce tail gas emission and nitrogen oxide content in the tail gas during nitric acid preparation.

This application relates to the field of pressure sensor diaphragm technology, providing a pressure sensor diaphragm and core with a mechanically gradient composite structure. The diaphragm includes a multilayer composite matrix and a gradient hardness reinforcement transition zone. The multilayer composite matrix is ​​formed by solid-state metallurgical bonding of at least three metal layers with different properties to form an integrated structure, with a gradient distribution of mechanical properties in the thickness direction. The gradient hardness reinforcement transition zone is formed in the sealing and welding area at the edge of the diaphragm, and the microhardness changes continuously or quasi-continuously from the diaphragm side to the base side. This application also discloses a method for preparing the diaphragm and a core containing the diaphragm. This application solves the problem of contradictory properties of a single material through multilayer functional layered composite, alleviates stress concentration in the welding area through local gradient reinforcement, significantly improves the diaphragm's yield strength, fatigue resistance, and sealing reliability, extends the sensor's service life, and the preparation process is mature and controllable, suitable for standardized mass production.

The invention relates to the technical field of mineral separation, and provides a mineral separation device and method based on combination of electromagnetism and gravity. The device comprises a free settling and magnetic separation section and an interference settling separation section which are communicated from top to bottom; the magnetic field generating device comprises opposite electromagnetic poles oppositely arranged on the two sides of the free sedimentation and magnetic separation section and is used for generating a background magnetic field penetrating through the magnetic field generating device; and the magnetic medium array is arranged in the free sedimentation and magnetic separation section, comprises a plurality of magnetic medium rods which are arranged in parallel and is used for generating a magnetic field gradient in a background magnetic field, so that minerals entering the background magnetic field are separated under the action of gravity and the magnetic field gradient. According to the method, the separation selectivity and the collection performance of minerals with small density and specific magnetization coefficient differences, especially micro-fine particle minerals, are improved.