11results about How to "Downgrade" patented technology

The invention discloses a method for extracting iron and reducing titanium from vanadium-titanium-iron concentrate, and belongs to the technical field of mineral separation. The invention provides a method for extracting iron and reducing titanium from vanadium-titanium-iron ore concentrate in order to realize the removal of Ti in titanomagnetite with the same internal mass appearance, which comprises the following steps: grinding, filtering, drying and scattering the vanadium-titanium-iron ore concentrate, uniformly mixing with a calcium source, roasting, grinding the roasted material, and carrying out low-intensity magnetic separation and reverse flotation to obtain the iron ore concentrate. According to the method, the vanadium-titanium-iron concentrate and CaCO3 or CaO are roasted, Ti in titanomagnetite is transferred into perovskite or iron titanate and the like from the titanomagnetite, then through ore grinding and low-intensity magnetic separation, all components in roasted materials are fully dissociated, the reverse flotation process is optimized, the grade of TFe in the iron concentrate is improved, and the grade of TiO2 in the iron concentrate is reduced.

The invention relates to a wire rod for tire cord steel and a preparation method of the wire rod, and belongs to the technical field of steelmaking. The production process flow of molten iron pre-desulfurization, electric furnace smelting, LF refining, continuous casting, rolling and temperature control cooling is adopted, and the abnormal structure of the wire rod grain boundary network cementite is relieved through the whole flow of continuous casting, steel rolling and temperature control cooling. According to the steel grade C content, the pulling speed of a continuous casting machine, the crystallizer and secondary cooling water amount, electromagnetic stirring and other technological parameters are set, the stirring effect of an electromagnetic stirrer at the tail end is fully played, the center density of a continuous casting billet is improved, center shrinkage cavities are eliminated, center looseness and segregation are relieved in combination with large withdrawal and straightening machine pressing force, and the continuous casting billet is obtained by controlling rolling and temperature control cooling technological parameters. The grade of tire cord steel wire rod net carbon cementite is effectively reduced, the structure uniformity of the wire rod is improved, center segregation, looseness and shrinkage of a continuous casting billet are effectively improved, and the quality of the wire rod is improved.

The present application relates to a reinforced concrete pillar and a method for blasting demolition of a structure, which forms a door hole by breaking a supporting cylinder wall of a high-rise structure, replaces the supporting system of the door hole with an axial pre-buried hole reinforced concrete pillar, and simultaneously charges and blasts in the pre-buried hole while drilling and charging in the remaining supporting cylinder wall, thereby achieving the blasting demolition of the high-rise structure. The present application can greatly improve the safety of blasting demolition, ensure the accuracy of directional collapse, greatly reduce the consumption of explosives and detonators, simplify the blasting network and charging operation, greatly reduce the blasting vibration and blasting dust, and achieve a more green blasting demolition. The present application is suitable for the blasting demolition of high-rise structures such as chimneys, water towers and silos made of bricks, concrete and reinforced concrete, and has a wide range of applications.

The utility model relates to the field of scroll compressor, concretely is a kind of built-in two-stage oil separation component, for scroll compressor, the scroll compressor includes first exhaust port, including exhaust chamber, primary separation unit and secondary separation unit, the primary separation unit inside is barrel, and the secondary separation unit inside is barrel with smaller open end;The open end inner diameter of primary separation unit is less than the inner diameter of secondary separation unit bottom end, and the open end of primary separation unit and the open end of secondary separation unit are communicated.The utility model forms the flow rate of gas greater than the flow rate of tiny oil droplet by primary separation unit, forms the flow rate of gas less than the flow rate of tiny oil droplet by secondary separation unit, and oil-gas mixed gas is separated continuously two times, greatly improves oil-gas separation efficiency.

The application discloses high-sulfur steel, including components and mass percentage: C: 0.67%-0.73%, Si: 0.15%-0.25%, Mn: 0.45%-0.65%, P: ≤0.045%, S: 0.060%-0.070%, Cr: 0.10%-0.20%, Mo: ≤0.06%, Ni: ≤0.20%, V: 0.03%-0.04%, Al: ≤0.03%, N: 0.012%-0.016%, the balance is Fe and impurities.The application provides a preparation process of high-sulfur steel, including the following steps: step S1, converter process; step S2, refining process; step S3, VD process; step S4, continuous casting process.The beneficial effect is that the Al content in the steel is controlled at a relatively high level to offset the secondary oxidation caused by the addition of quartz sand at the end of the refining, that is, the low oxygen state in the steel is ensured by Al.

The application discloses a collophanite reverse flotation process applied to yield improvement, and the process is characterized in that flotation reagents are sequentially added into phosphorite slurry and then introduced into roughing operation, roughing is carried out, and rough concentrate and foam product I are obtained; the foam product I is introduced into one-stage scavenging after adding an adjusting agent, and scavenging concentrate I and foam product II are obtained; the scavenging concentrate is reselected after adding flotation reagents, and reselected concentrate and foam product III are obtained; the reselected concentrate and the rough concentrate are mixed and then introduced into cleaning after adding flotation reagents, and final concentrate and foam product IV are obtained, and the foam product IV is returned to the roughing operation; the foam product III is mixed with the foam product II, and two-stage scavenging is carried out, and scavenging concentrate II and foam product V are obtained, the foam product V is final tailings, and the scavenging concentrate II is returned to the one-stage scavenging operation. The process is stable, simple and efficient, has strong adaptability to ores, and has low phosphorus content of tailings and higher phosphorus yield.

The present disclosure relates to the technical field of spodumene ore dressing, and provides a method for efficiently enriching lithium from spodumene ore, including: crushing the spodumene ore and performing a first particle size classification to obtain a first coarse-grained mineral and a first fine-grained mineral; performing a first stage of heavy medium sorting on the first coarse-grained mineral to obtain a heavy medium sorted spodumene concentrate and a first heavy medium sorted tailings; performing a second stage of heavy medium sorting on the first heavy medium sorted tailings to obtain a heavy medium sorted spodumene middlings; grinding the heavy medium sorted spodumene middlings and merging them with the first fine-grained mineral, performing a second particle size classification to obtain a second coarse-grained mineral and a second fine-grained mineral; performing spiral chute sorting and shaking table sorting on the second coarse-grained mineral and the second fine-grained mineral, respectively, to obtain a spiral chute sorted spodumene concentrate and a shaking table sorted spodumene concentrate. The present invention discloses a method for dressing that efficiently obtains spodumene concentrate using a full gravity separation process, wherein the grade and recovery rate of Li2O are high.

The present application relates to a kind of tailings classification scanning device, belong to mineral separation technical field.The device includes: tailings separation unit, with the separation cylinder upper end of mineral separation equipment is connected or with separation cylinder, including tailings overflow weir, configured to discharge tailings in the separation cylinder from the tailings overflow weir;Tailings classification unit is arranged in the periphery of the tailings separation unit, including tailings classification overflow weir, configured to discharge the tailings classified processing, to obtain tailings of different levels;The height value of the tailings classification overflow weir is less than the height value of the tailings overflow weir.The present application can realize the multistage separation of tailings, to obtain different grade and the stable component content of tailings, to reduce the waste of mineral resources, improve the component content qualified rate of each grade product.

This invention belongs to the field of iron and steel metallurgical refining technology, specifically relating to a method for treating inclusions in heavy rail steel using tellurium or calcium tellurium composite treatment. To reduce the Class A inclusion rating of heavy rail steel, this invention provides a method for treating inclusions in heavy rail steel using tellurium or calcium tellurium composite treatment. This method involves performing tellurium or calcium tellurium composite treatment during RH refining to improve the morphology of sulfides in the heavy rail steel. The tellurium or calcium tellurium composite treatment process employs inert gas soft blowing to enhance the circulation of molten steel in the ladle, thereby improving the effect of the tellurium or calcium tellurium composite treatment, reducing the Class A inclusion rating, and improving the machinability of the steel.

This invention relates to a chlorine-free green refining method for crude bismuth, belonging to the field of pyrometallurgical technology for non-ferrous metals. The process includes: oxygen-enriched ash blowing: removing arsenic and antimony from crude bismuth to a content of ≤0.08%; vacuum distillation: vacuum distilling the arsenic-antimony-removed crude bismuth to obtain volatile lead-bismuth-tellurium alloy and residual copper-tin-silver alloy; alkali removal of tellurium: adding caustic soda to the lead-bismuth-tellurium alloy under oxygen-enriched blast to obtain a lead-bismuth alloy and alkaline slag; preliminary lead removal through oxidation slag formation: blowing the lead-bismuth alloy into oxygen-enriched air while simultaneously adding slag-forming agents in batches to obtain bismuth-rich lead; continuous crystallization: continuously crystallizing the bismuth-rich lead to obtain refined bismuth with a purity greater than 99.99 wt% and a bismuth-based lead alloy. This invention employs a technical solution of "oxygen-enriched ash blowing – vacuum distillation – alkali removal of tellurium – preliminary lead removal through oxidation slag formation – continuous crystallization," forming a novel short-process, environmentally friendly refining technology to purify crude bismuth into refined bismuth.

The application discloses a magnetic and hematite mixed iron ore dressing flotation agent and a preparation method thereof. First, quaternary ammonium salt is obtained by reacting alkyl tertiary amine and benzyl chloride as raw materials; then allyl polyoxyethylene ether phosphate is obtained by reacting allyl polyoxyethylene ether and diaphosphorus pentoxide as raw materials; then linear dextrin is obtained by hydrolyzing the first part of corn starch, and oxidized dextrin is obtained by first-time oxidation; then the oxidized dextrin is mixed with the second part of corn starch and water, and pretreated starch slurry is obtained by high-pressure micro-jet and high-pressure pulse electric field treatment; the second-time oxidation is realized by ozone nano-bubbles to obtain an inhibitor; finally, the quaternary ammonium salt, the allyl polyoxyethylene ether phosphate, the inhibitor and diesel oil are uniformly mixed to obtain the flotation agent. The flotation agent is particularly suitable for the reverse flotation of the magnetic and hematite mixed iron ore, and the grade of the iron concentrate is low and the recovery rate is high.