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198results about How to "Advanced technology" patented technology

Resource process method for coking sulfur-containing waste water

ActiveCN101306885AAdvanced technologyReduce energy consumptionThiosulfates/dithionites/polythionitesThiocyanic acidChemistryNanofiltration
The invention relates to a method for resourceful treatment of coking sulfur-containing wastewater. The coking sulfur-containing wastewater is added into a microfiltration or ultrafiltration membrane separator, solid elemental sulfur contained in the wastewater is entrapped and condensed, and is subject to the washing purification to produce pure sulfur; penetrating fluid is led into a nanofiltration membrane separator, ammonium thiosulfate is entrapped and condensed, and is extracted to produce the ammonium thiosulfate; then the penetrating fluid is led into a reverse osmosis membrane separator, ammonium thiocyanate is trapped and condensed, and is extracted to produce the ammonium thiocyanate, wherein, the penetrating fluid is purified water and can be returned to the working section for repeated use. The method can separate and purify valuable sulfur and secondary salt in the coking sulfur-containing wastewater to create certain economic value, can also improve the circulating utilization rate of industrial water to realize zero draining of wastewater and achieve the requirement of cyclic economy, and is suitable for treating the coking sulfur-containing wastewater of desulfurization and decyanization processes using a HPF method of various coking gas.
Owner:NANJING UNIV OF TECH

A kind of ingot casting method of 800 kg single polycrystalline silicon

The invention provides an ingot casting method for single polysilicon of 800kg. The method comprises the steps of: step 1, selecting a square monocrystalline silicon wafer of 156*156mm in size and 1-50mm in thickness and laying it tightly and uniformly at a crucible bottom with an external dimension of 1050*1050mm; step 2, adding a primary polysilicon material and an alloy matching with the target resistivity to the square monocrystalline silicon wafer, and at least 800kg of materials are charged altogether; step 3, conducting vacuum pumping and leak detection; step, carrying out heating; step 5, implementing melting; step 6, performing crystal growth: after 30min of insulation, opening an insulating cage to a degree of 8cm and controlling the fall of temperature to 1436DEG C within one hour, then opening the insulating cage to a degree of 10cm, with the temperature maintained at 1436DEG C; step 7, conducting annealing. The single polysilicon ingot prepared with the method of the invention contains a majority of monocrystalline silicon and little polycrystalline silicon. Able to casting a single polysilicon ingot over 800kg at one time, the casting method provided in the invention greatly improves the production efficiency.
Owner:JINGYUNTONG TECH CO LTD

Aluminum substrate material of copper-aluminum composite plate strip, copper-aluminum composite plate strip and processing method of copper-aluminum composite plate strip

The invention discloses an aluminum substrate material of a copper-aluminum composite plate strip, simultaneously relates to the copper-aluminum composite plate strip and a processing method thereof, and belongs to the technical field of a metal plate strip processing. According to the invention, the copper-aluminum composite plate strip adopts the aluminum substrate material containing Si, Fe, Cu and Mn and a copper clad material; the strength of the aluminum substrate material is increased by adding elements of Si, Fe, Cu and Mn, and the processing property of the aluminum material is changed to be identical to the processability of the copper clad material, so that the problems that the soft annealing temperatures of copper and aluminum are different in the plate strip manufacturing process and composite materials are difficult to be punched are solved; and the composite material can reach deep drawing properties of pure copper and pure aluminum. In a process of processing the plate strip, a billet is prepared through an oxygen-free high-pressure continuous casting, and then the billet is subjected to processes, such as cold rolling, intermediate annealing, finish rolling and finished product annealing, so that the integral property of the plate strip is further improved. The copper-aluminum composite plate strip processed by the method is high in production efficiency, stable in quality, advanced in technology, and remarkable in economic benefit, and saves energy and materials.
Owner:LUOYANG TONGYI METAL MATERIAL DEV

Ore-dressing method for recovering nickel from ore-washing slurry of copper-nickel sulfide ore

The invention provides an ore-dressing method for recovering nickel from ore-washing slurry of copper-nickel sulfide ore. The method comprises the following steps: performing a gravity concentration process on the ore-washing slurry; storing and dewatering the ore sand of the gravity concentrate; performing an open-circuit grinding process; performing a main program check screening process; performing a closed-circuit grinding process on unqualified grains; adding drugs in qualified grains and then performing a flotation process, wherein after performing the processes of coarse selecting, scavenging and finely selecting, the nickel concentrate grade is 6%-8%, the copper grade is 1%-1.6%, the grade of nickel in tailings is less than or equal to 0.2%, and the grade of copper in tailings is less than or equal to 0.04%; and then concentrating and dewatering the gravity concentrate tailings by using a concentrating machine; performing a slurry flotation process; adding a dispersing agent after adjusting the slurry with high concentration; and adding an ore-dressing reagent in stage adding manner, wherein the nickel concentrate grade is 4%-7% and the copper grade is 0.8%-1.5%. The ore-dressing method has the advantages of low cost, high production efficiency and high comprehensive recovery rate of valuable metal. The ore-dressing method is an ideal ore-dressing method for recoveringnickel from ore-washing slurry of copper-nickel ore.
Owner:JILIN JIEN NICKEL IND

Heat-insulating decorative fireproof partition board for exterior wall of building and construction method thereof

The invention discloses a heat-insulating decorative fireproof partition board for an exterior wall of a building and a construction method thereof. The heat-insulating fireproof decorative board adopts a heat-insulating foaming ceramic board made of fireproof materials as a fireproof partition and heat-insulating material; the heat-insulating foaming ceramic board, an enhanced panel and veneer materials form an integrated board with the functions of fire prevention, heat insulation and decoration; integrated boards are arranged along the horizontal direction of the building at intervals of certain height in a heat-insulating system for the exterior wall of the building or arranged on upper edges of window and door openings of the building to form a fire barrier, so that the flame propagation can be effectively prevented and the fire damage can be reduced; the heat-insulating fireproof decorative board is bonded with a base course wall of the building through cement mortar at first and then anchored and supported through a machine; and exterior finishes can be painted with fluorocarbon paint, fluorocarbon metallic paint, stone-like paint and the like and be matched with a conventional heat-insulating decorative board for the exterior wall of the building for use. The heat-insulating decorative fireproof partition board disclosed by the invention can be used as a fireproof construction measure to be widely applied to heat-insulating projects of exterior walls of the building industry, and has the advantages of fire prevention, heat insulation, durability, impact resistance, good decorative effect and the like. The construction method disclosed by the invention has the advantages of advanced technology, economy and rationality, convenience for assembly, low energy consumption for construction, and conformity with the national requirements of environmental protection and energy saving.
Owner:江苏建科土木工程技术有限公司

Method for preparing low-temperature high-toughness siloxane copolymerized MC (monomer-cast) nylon by polymerization

The invention discloses a method for preparing low-temperature high-toughness siloxane copolymerized MC (monomer-cast) nylon by polymerization. The method comprises the steps of: firstly, reacting polyhydroxy siloxane with a multifunctional isocyanate activator to produce a polysiloxane macromolecule activator Si-NCO; respectively vacuum dewatering a caprolactam in two reaction kettles, adding a catalyst in one reaction kettle and continuing vacuum dewatering, while adding the activator Si-NCO in the other reaction kettle and evenly mixing; when the vacuum degrees of the two kettles achieve 10-15mmHg, rapidly mixing materials in the two kettles to even, casting the mixed material in a preheated mould, keeping the temperature for 30 minutes to 1 hour, and removing the mould, thus obtaining the low-temperature high-toughness siloxane copolymerized MC nylon. The notch impact strength of the low-temperature high-toughness siloxane copolymerized MC nylon is 20%-400% higher than that of an unmodified MC nylon prepared under the same conditions, and the tensile strength and the impact strength of the MC nylon at the temperature of minus 40 DEG C can be maintained at 80% those of the MC nylon at the temperature of 25 DEG C. In addition, the flame retardant performance of the MC nylon is improved.
Owner:江苏利德尔新材料科技有限公司

Self-adaptive real-time compensation system for steel support axial force during deep foundation ditch construction and method thereof

The invention discloses a self-adaptive real-time compensation system for a steel support axial force during deep foundation ditch construction and a method thereof. The compensation system comprises a plurality of field control stations, a plurality of hydraulic proportion servo control pump station devices, a plurality of detecting elements, an operation station and a monitoring station, wherein the field control stations, the operation station and the monitoring station are connected and communicated through a CAN bus; each field control station is connected with the plurality of the hydraulic proportion servo control pump station devices; the hydraulic proportioning servo control pump station devices comprise hydraulic pump stations and a plurality of jacks, and the hydraulic pump stations are respectively connected with the jacks and control the jacks to hold up corresponding steel supports; each detecting element respectively detects the operating situation of the jacks and feeds information back to the field control stations to which the jacks belong; and the monitoring station and the operation station monitor the real-time operating situations of the hydraulic pump stations and set the operating parameters of the jacks. The invention can realize real-time compensation of the steel support axial force during deep foundation ditch construction so as to reduce the deformation of a foundation ditch.
Owner:SHANGHAI CONSTRUCTION GROUP
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