133results about How to "Craft brief" patented technology

The invention relates to a thermal-insulating anti-flaming building material and a preparation method thereof. The thermal-insulating anti-flaming building material comprises the following components by weight parts: 45 to50 parts of lightweight aggregates, 45 to 50 parts of inorganic gelled materials, 5 to 10 parts of toughening agents, 3 to10 parts of interface modifying agents and 0.5 to 2 parts of dispersing agents. The quick coagulating function and the closing function of the interface modifying agents are utilized to perform hole-closing treatment on the surfaces of the lightweight aggregates; fibrous inorganic whisker materials with big ratio of length to diameter are selected as the toughening materials; the defects of inferior thermal-insulating effect and fragile property of the inorganic thermal-insulating material are thoroughly overcome; all the raw materials of the thermal-insulating anti-flaming building material are selected from A-level anti-flaming materials and areexcellent in anti-flaming effect; and the production process for the thermal-insulating anti-flaming material is simple and short, is continuously operated, is easily performed and controlled and is beneficial to industrialized application.

The invention relates to a method for improving dewatering performance of excess sludge by combining biological acidification and Fenton-like oxidation, which belongs to the technical field of sludge treatment. The method comprises that: under the condition of adding a sufficient quantity of substrates, indigenous acidification bacteria serving as inoculation liquid are cultured and acclimatized from sludge; the inoculation liquid is added to excess sludge in order to perform biological acidification on the sludge under an aerobic stirring condition in the presence of a sufficient quantity of substrates till the pH of the sludge is 2 to 3; under the catalytic action of Fe2+ and Fe3+, H2O2 produces strong oxidative free radicals and other Fenton-like oxidized sludge; Ca(OH)2 solution is added to the treated sludge to regulate the pH of the sludge to be between 6 and 7; and the treated sludge is dewatered by a plate-frame pressure filtration method or a centrifugal dewatering method in order to obtain dewatered sludge with water content between 65 and 75 percent. The combination of biological acidification and Fenton-like oxidation for improving the dewatering performance of excess sludge can improve reaction efficiency, shorten reaction time, increase treatment capacity and reduce cost for sludge treatment.

The invention discloses a treatment method of zinc sulfide ore concentrates, which comprises the following steps of: (a) mixing and size-mixing the zinc sulfide ore concentrates with a sulfuric acid solution with the concentration of 120 to 170g/L, and supplying to a first pressurizing kettle; (b), subjecting the zinc sulfide ore concentrates to acid leaching to obtain a leaching solution and leaching residue; (c) supplying the leaching solution to a second pressurizing kettle, adding a neutralizing agent and an iron removal agent and simultaneously introducing pure oxygen in, and reacting for a second predetermined time in order to implement neutralization and iron removal and obtain a neutralization solution and neutralization residue; and (d) treating a second leaching solution by adopting zinc hydrometallurgy process in order to obtain metal zinc. Thus, full zinc hydrometallurgy in the true sense is accomplished by using the zinc sulfide ore concentrates as a neutralizing agent, oxygen pressure leaching, neutralization and iron removal are combined in one reaction kettle, thereby simplifying the process flow; and the reaction process is intensified through high temperature and pressurization, thereby further raising the leaching rate of zinc.

The invention discloses a method for directly producing chrome-base alloy steel by comprehensively using calcium-free chrome slag, which is implemented by the steps of weighing, material preparation, reduction smelting, slag discharge, iron discharge, refining pouring and the like. The chrome-base alloy steel is prepared by the following steps of: adding a reducing agent into the calcium-free chrome slag; smelting the calcium-free chrome slag in a smelting furnace; and directly introducing the molten chrome and iron into a refining furnace to perform oxygen blowing decarburization refining. The chrome-base alloy steel comprises the following main components: 0.2 to 6.0 percent of carbon (C), 8.0 to 50.0 percent of chromium (Cr), 0.3 to 1.0 percent of silicon (Si), less than or equal to 0.05 percent of sulphur (S), less than or equal to 0.05 percent of phosphorus (P) and 0.1 to 0.5 percent of vanadium (V). The alloy steel can be directly used for manufacturing or forging various wear resistant materials, such as cement, wear resistant steel balls for power and mineral separation, forging steel or liners and the like. In the method, the chrome-base alloy steel product is directly produced by using the calcium-free chrome slag as a raw material, so that the calcium-free chrome slag is completely detoxified and the limited chrome resource is recycled. Thus, the method has a great significance for clean chrome salt production and waste slag recycling.

The invention relates to a method for extracting platinum group metals from a waste automotive three-way catalyst. The method is characterized in that the platinum group metals in the waste automotive three-way catalyst are captured through lead smelting to obtain a material with Pt, Pd and Rh, and the material is heated to a certain temperature under the vacuum condition to volatilize the lead of the material and achieve the aim of highly enriching the platinum group metals of the material. By adopting the method, the extraction process of the platinum group metals in the waste automotive three-way catalyst is short, the efficiency is high and the environmental pollution of the process is lower.

The invention relates to a method for leaching precious metals from a spent catalyst. The method is suitable for leaching platinum, palladium and rhodium from an automobile spent ternary tail gas catalyst. The method comprises the following steps: performing calcination decarburization at a proper temperature, crushing and grinding the obtained catalyst, performing reducing conversion, and performing two-stage countercurrent dissolving to leach the platinum, palladium and rhodium. The method for leaching the platinum, palladium and rhodium from the ternary tail gas catalyst through adopting awet process has the advantages of short process, low treatment cost and high precious metal leaching rate, and allows the platinum leaching rate to reach 96.5%, the palladium leaching rate to reach 98.4% and the rhodium leaching rate to reach 91.1%.

The present invention relates to an improved preparation method for synthesizing phloroglucin. Said invention uses 2.4-dichlorophenol or 2.6-dichlorophenol as original raw material, and utilizes potassium hydroxide and inert solvent with high boiling point to make reaction of first-elimination after-addition to prepare phloroglucin by means of one-step process. Its yield is 56.6%-65.2%.

The invention provides a vanadium leaching method for high-chrome vanadium residues. The vanadium leaching method includes the process steps that high-chrome vanadium residues are smashed into particles with the granularity smaller than 150 mesh; the particles are put in the microwave condition and the air atmosphere to be heated and baked to obtain high-chrome vanadium residue clinker, wherein the heating frequency of microwaves is controlled to be 2 GHz to 3 GHz, the heating temperature is controlled to be 700 DEG C to 1000 DEG C, and the heating time is controlled to be 10 min to 120 min; the high-chrome vanadium residue clinker is smashed into particles with the granularity smaller than 200 mesh; a dilute sulphuric acid solution with the concentration of 0.5 mol/L to 6 mol/L is added to the clink particles, the mixture is stirred and leached for 10 min to 180 min at the temperature of 70 DEG C to 100 DEG C; and vanadium-containing filtrate and vanadium tailings are obtained after the mixture is filtered and separated. The method is put forward for high-chrome vanadium residues without effective treatment methods on the current domestic market, various types of high-chrome vanadium residues with the chrome content reaching up to 8% to 14% can be effectively processed, and the final vanadium leaching rate reaches 86% or above.

The invention relates to a method for improving sludge dewatering performance by combining bioleaching and dual conditioners, and belongs to the technical field of sludge treatment. The method comprises the following steps of: under the condition of adding sufficient substrates, culturing and domesticating autochthonous bacteria in sludge, and using the autochthonous bacteria as inoculum; adding the inoculums into the residual sludge, and performing bioleaching on the sludge under the conditions of aerob, stirring and proper substrate until the pH of the sludge is about 2; adding saturated NaOH solution into the leached sludge to adjust the pH of the sludge to between 6 and 7; adding aluminium polychlorid and polyacrylamide into the sludge to condition the sludge; and performing mechanical dewatering on the treated sludge by a plate-and-frame filter pressing or centrifugal dewatering method to obtain the dewatered sludge with the moisture content between 65 and 75 percent. The bio-acidification and the dual conditioners are combined to improve the sludge dewatering performance, so the reaction efficiency can be improved, the reaction time can be shortened, the treatment capacity can be improved, and the sludge treatment cost can be reduced.

The invention provides a device used for ore screening and smashing. The device comprises ore tanks used for containing ore materials, a plurality of vibrating screens used for screening the ore materials, a crusher used for smashing the ore materials, a movable sliding chute used for playing the effects of balancing and distribution, and overturning plates used for receding the first-class vibrating screen and the third-class vibrating screen. The device used for ore screening and smashing has the beneficial effects that the process is simple and short, the space occupied by equipment is small, classification cost is low, energy can be saved obviously, the technology is advanced, and the device is quite effective.

The invention provides a thermoplastic starch elastomer. An elastic polymer of a starch-polybutadiene-vital gluten interpenetrating polymer network is formed by hydroxyl-terminated polybutadiene and low-molecular-weight straight-chain starch and vital gluten chain expansion, and the polymer is a high-strength thermoplastic starch elastomer with large intensity and excellent heat-resistance performance. The invention further provides a preparation method of the thermoplastic starch elastomer. The branched structure of starch milk is disassembled through a high-pressure homogenizer, a starch chain is fractured and converted into a straight chain structure, the molecular weight of starch is reduced and distributed in a narrow constant range, then chain expansion is performed on starch milk together with hydroxyl-terminated polybutadiene and vital gluten, so that the polymerization is increased, the molecular weight is improved, not only can the intensity be high, but also the processing temperature window is broadened. The preparation method is simplified in production technology, the production environment is clean, the performances of products are improved, and the preparation method is suitable for large-scale production and application.