196results about How to "No flying" patented technology

The invention relates to a process for preparing a high-activity semi-hydrated gypsum cementing material and a gypsum product by the aid of phosphorous gypsum. The process includes technical processes of 1) a pretreatment process for the phosphorous gypsum; 2) a normal-pressure water heating reaction process; 3) a slurry preparation process; and 4) a preparation process for the high-activity semi-hydrated gypsum cementing material and the gypsum product. The process for preparing the high-activity semi-hydrated gypsum cementing material and the gypsum product by the aid of the phosphorous gypsum has the advantages that a process for preparing the high-performance semi-dehydrated gypsum cementing material by the aid of the phosphorous gypsum is completed under the normal-pressure mild condition, the process can be combined with an independent gypsum product manufacturing process to produce gypsum blocks, gypsum plates or other semi-hydrated gypsum products, and production flexibility of the technical processes is realized. In addition, owing to normal-pressure conversion, investment cost and running cost are saved, the processes are easily controlled, reliability is improved, performances of the product are excellent, materials are wet during the process which adopts wet phosphorous gypsum raw materials and produces the product, flying dust is prevented, waste is utilized, and effects of saving energy and protecting environments are realized.

A superfine calcium carbonate filled powdered rubber is prepared from dry rubber, superfine calcium carbonate, surfactant, operating oil, antioxidant, emulsifier, coagulant and deionized water through proportioning, emulsifying, heat treating, coagulating and post-treating. Its advantages are high coating effect, high pulverizing rate (99% or more), and high mechanical performance, flowability and storage stability of product.

The invention relates to a wet process for building a 3t intermediate frequency electric furnace. By the process, 3t of materials can be melted, and the service life is prolonged. The process comprises the following steps of: (1) manufacturing a steel crucible die which has a shape of a truncated hollow cone; (2) paving an insulation layer and a thermal insulation layer by using two layers of asbestos cloth; (3) paving a furnace bottom, namely paving two layers of asbestos cloth at the furnace bottom in a staggered mode; (4) paving a furnace wall, namely paving two layers of asbestos cloth next to the inner wall of an induction coil from top to bottom, ensuring that each layer is flat and does not have any wrinkle, adhering longitudinal joints for lapping by using water glass, staggering joints of two adjacent layers, and adhering the asbestos cloth which stretches out of the upper plane to a fireproof brick plane at an upper opening of the furnace by using the water glass; (5) preparing a furnace lining material from refined quartz sand; (6) manually knotting a furnace lining, brushing a layer of water glass before filling, and tamping a filler; and (7) baking the furnace and sintering, namely baking only by using firewood after the furnace is built by the wet process, adding 50 to 60kg of firewood into a hearth for several times, and completely combusting to bake the furnace lining.

The invention discloses a modified plant fiber material type glass moldproof parting powder which is prepared by carrying out surface modification on plant fiber pulverized substances. The preparation method comprises the following steps: screening plant fiber pulverized substances, mixing with a modifier solution, standing, treating under the absolute pressure of 100-500kPa at the temperature of 0-300 DEG C for 0.1-48 hours, and finally, directly drying to obtain the modified plant fiber material type glass moldproof parting powder. The modifier is selected from one or mixture of organic acids, inorganic acids or acid salts. The moldproof parting powder has the advantages of favorable flowability, adsorptivity and natural degradability, can postpone the glass from becoming moldy, basically does not generate flying ash, and is clean and convenient. The glass using the product can be easily cleaned after long-term storage, and can not influence the subsequent processing and use of the glass.

The invention provides a weeding macro granule for a paddy field. The weeding macro granule comprises the following raw materials in parts by weight: 1-30 parts of pretilachlor, 1-25 parts of adsorbents, 0.5-5 parts of pyrazosulfuron, 0.5-25 parts of surfactants, 1-30 parts of oily substances, 10-80 parts of a solid core material, 10-20 parts of additives and 10-20 parts of fillers. The weeding macro granule for the paddy field disclosed by the invention utilizes a floating material, floating glass beads, and thus the granules can float on water, and can automatically diffuse under the action of wind and assistants of the granules; a high-performance dispersing agent is introduced into the formula, and thus the effective components of the granule can diffuse to the overall field within a short period of time. Thus, the pesticide effect is lasting, and labor and time are saved.

The invention refers to a dust-free lithium hydroxide monohydrate and a preparation method thereof, belonging to the technical field of lithium hydroxide. The technical problems to be solved by the invention are that wet LiOH.H2O has a problem of hardening and dry LiOH.H2O has a problem of dust explosion in the prior art. The invention provides a novel LiOH.H2O, that is, dust-free lithium hydroxide monohydrate without hardening. The lithium hydroxide monohydrate is a loosened granular wet product, wherein the content of water is less than or equal to 3.5%, and the surface of the lithium hydroxide monohydrate is coated with a little anti-hardening agent. The dust-free lithium hydroxide monohydrate is prepared by the following methods: (1) preparing a LiOH solution having a Li2O concentration of 70+-5g/l, and the concentration of SO42- is less than or equal to 15g/l; (2) evaporating the LiOH solution obtained in the step (1) until the ratio of liquid to solid is 1: (0.8-1.5); adding a little anti-hardening agent; uniformly stirring; separating and washing the mixture to obtain dust-free wet LiOH.H2O; and carrying out vacuum seal and packing the wet product, wherein the obtained product is not hardened within 3-5 months.

The invention discloses a method and equipment for preparing lithium iron phosphate from a lithium iron phosphate precursor. The method comprises the three process steps of pretreatment of the lithium iron phosphate precursor material, pre-sintering and sintering; and in a non-oxidizing environment, the precursor material is heated by a certain number of microwave heaters, and the three process steps are finished by controlling treatment temperature and treatment time to finally prepare the lithium iron phosphate product. The equipment comprises a material inlet, a material feeding ventilation chamber, a pretreatment unit furnace, a pre-sintering unit furnace, a sintering unit furnace, a material discharging ventilation chamber, a cooling material discharging mechanism, a material outlet,a vacuumizing device, a protective gas input device and an equipment control circuit. In the method, the pretreatment and pre-sintering process steps are added to optimize a lithium iron phosphate microwave sintering process and solve keys problems on product quality control. The equipment provided by the invention realizes continuous microwave sintering by a plurality of unit furnaces so as to improve the sintering efficiency and realize large-scale industrial production.

The invention relates to a purifying method for a particle type slag steel, wherein, an autogenous tumbling mill is used to mill without media the particle type slag steel that is weathered, smoldered and in particle size >60 mm, TFe>50%, and an semi-autogenous tumbling mill is used to mill with media the particle type slag steel that is weathered, smoldered and in particle size 30-60 mm, TFe 30 swung dash 50%. During the milling, the non magnetic slag and small steel particles attached on the slag steel surfaces separate from the substrates due to the bumping and rubbing between the milling body and the raw materials, and between the raw materials. After being discharged from the mills, the raw materials smaller than 30 mm are sieved away to obtain class A slag steel with TFe>=90% and class B slag steel with TFe>=80%. The invention has the advantages of the compact structure, the small footprint, the no waste water, waste slag and waste gas discharging and the no dust flying during the production, and the realization of clean production while realizing hi-efficiency use of steel slag resources. The class A/B slag steel sieved from the particle slag steel can be directly used by steel and iron making plants.

The invention discloses a composite molten steel slag washing agent based on LF (ladle furnace) refining waste slag and a preparation method thereof. The composite molten steel slag washing agent consists of 65 to 95% of LF refining slag, 10 to 30% of active lime and 5 to 15% of industrial soda. The LF refining slag is composed of 50 to 60% of CaO, 25 to 35% of Al2O3, 4 to 8% of SiO2, 4 to 7% of MgO, 0.5 to 1.0% of MnO and FeO, 0.005 to 0.02% of P2O5, and 0.01 to 0.3% of S; the active lime includes 90 to 94% of CaO, and HCl with activity of 350 to 380 ml/4N and granularity of 0.5 to 3.0 mm; and the industrial soda includes 99.2% of Na2CO3 with granularity of 0.5 to 1.0 mm. The preparation method comprises the following steps of: processing the LF refining slag and the active lime into the powder with the granularity of 0.5 to 3.00 mm; uniformly mixing and stirring the materials according to the percentage, dry-pressing and moulding the materials with granularity of 25 to 35 mm and applying the waterproof packaging to the materials. On the condition that the adding quantity is 4 to 6 kg/t, the desulfurization rate of the invention achieves more than 30%, the reduction rate of the total oxygen content is more than 25% and the qualified rate of the thermal top forge is improved from 80% to 95%, so that the invention realizes the resource recycling of the LF refining waste slag and is beneficial to the energy-saving and emission reduction of the iron and steel enterprises.

The invention discloses a method for preparing calcium zinc compound stabilizer used for the processing of PVC plastic; the invention is characterized by comprising: (1) organic acid, calcium oxide, and zinc oxide powder are dispersed in a water phase, and then under the function of a phase transfer catalyst, an organic acid calcium zinc compound is generated by reaction; (2) the compound which is obtained in step (1) is heated and added with an oil and grease substance, and then stirred until the material is completely separated from the water phase; and (3) the product which is obtained by separation is placed in a two-roll kneading machine, later heated to 130 DEG C, and then stirred and gradually added with antioxidant, stabilizing additives, and organic stabilizer; after tabletting and forming, a finished product is obtained. The invention is finished by one step, has short flow process, and does not produce waste; the formula of the method is optimized, the obtained composite calcium zinc stabilizer has high thermal efficiency, and the stabilizing time is improved by 50-100% compared with the products sold in the market; and the product takes the shape of a tablet or small particle, and has the advantages of no dust pollution, low beginning melting temperature, and wide adaptability.

The invention discloses a large scale vacuum furnace and continuous operation method for processing arsenical gold ore or arsenic concentrate; wherein, the vacuum furnace comprises a vertical furnace body, a horizontal furnace roof and a conical furnace bottom; a discharge tube, a flow rate control device and an electrical heating tube are arranged on the furnace roof; a vertical exhaust tube is extended from a skew joint on the lateral face of the furnace; a materiel level control observation window is arranged on the furnace body; a slag-guiding cone is arranged on the furnace bottom; a feeding system, a slag discharge system and a product collection system are arranged in the vacuum furnace, which are operated in vacuum. The large scale vacuum furnace and continuous operation method for processing arsenical gold ore or arsenic concentrate has the advantages of maximization of vacuum furnace, protecting electrical heating element, no air leakage, corrosion resistance of furnace mantle, sealed and degassed feeding, continuous feeding with the discharge tube fully filled with materials in the entire operation process, no dead angle in the slag discharge, stepwise product collection and automatic packing, and no three waste pollution in the production process and surrounding environment.

The invention discloses a preparation method of olefin rubber/filler blend vulcanized rubber. The method comprises the following steps: preparing a filler predispersion solution; plasticizing unvulcanized natural rubber by a rubber Banbury mixer, mixing with styrene-butadiene rubber and cis-1,4-polybutadiene rubber, increasing the temperature of the Banbury mixer to 110-160 DEG C, adding the filler predispersion solution into the rubber Banbury mixer, compounding, evaporating to remove water, and drying with hot air to obtain an olefin rubber/filler mixture; adding zinc oxide, stearic acid, a vulcanizing agent, an accelerator and an anti-aging agent into a rubber open mill or Banbury mixer, compounding uniformly, discharging, and standing to obtain the olefin rubber/filler compounded rubber; and vulcanizing the olefin rubber/filler compounded rubber on a flat vulcanizing machine to obtain the olefin rubber/filler blend vulcanized rubber. The method has the advantages of simple technique, no solvent pollution and no flying dust, is green and environment-friendly, and can be widely used for mixing multiple fillers and rubber.

The invention discloses a fluid bed granulating drier applied in various fields such as pharmacy, food, feeds, pigments and chemical industry. The fluid bed granulating drier comprises an adhesive tank, an air compressor and a fluid bed, wherein a hot air inlet is formed in the lower half part of the fluid bed and is connected with a heater; an air outlet of the fluid bed is connected with an exhaust fan via a pipeline; a filter is connected with the upper half part of the heater and is provided with an air inlet; filter cloth and a muffler are arranged at the air outlet of the fluid bed. The drier has a simple structure, is reasonable in design, completes the processes of mixing, granulating and drying in the same equipment, is quick in mass heat transfer, is operated at closed negative pressure, thus avoiding dust flying, is uniform in granules, does not have dead angles, is cleaned thoroughly, is free from cross pollution and is energy-saving and environment-friendly.

The glass polishing wheel is made with polyurethane, rubber, cerium oxide and assistant, and through mixing and pressing. It is used together with circulating water, and has the advantages of no dust, capacity of recovering waste material, no environmental pollution, high attachment of glass, etc.

The invention discloses a furfuran hydrazide insecticidal suspending agent and preparing method, which is composed of furfuran hydrazide with structural formula as formula (I) and suspending agent. The preparing method comprises the following steps: placing furfuran hydrazide and insecticidal suspending agent in the cutting autoclave, staring high-cutting emulsifying machine, blending the cut material evenly, grinding for 1-2 times.

The present invention relates to a dust-free health chalk. It is made up by using water-soluble wax, glycerine and titanium pigment, talcum powder and water through the processes of mixing raw materials, casting and drying.

The invention discloses a preparing method of a fluororubber/nanofiller composite material. The method comprises the steps of firstly preparing nanofiller hydrosol or nanofiller pre dispersion liquid; then using a rubber internal mixer to conduct plastify on the fluororubber, raising the temperature of the internal mixer to 120-200 DEG C after plastification, gradually adding the nanofiller hydrosol or the nanofiller water pre dispersion liquid into the rubber internal mixer, mixing, and adopting hot air to dry the material after evaporation of water finishes so as to prepare fluororubber/nanofiller mixture; adding the fluororubber/nanofiller mixture, zinc oxide, triallyl isocyanurate, dicumyl peroxide in a rubber mix mill, mixing evenly, conducting out slice, and stopping putting so as to prepare a fluororubber/nanofiller rubber compound; conducting vulcanization of the fluororubber/nanofiller rubber compound on a press vulcanizer to prepare the fluororubber/nanofiller composite material. The preparing method of the fluororubber/nanofiller composite material is simple in technology, free of pollution of solvent, free of dust flying upward, green and environmentally friendly, and capable of being applied to various recombination of nanofiller and rubber and being popularized.

The invention relates to a manufacturing method of beaded polytrifluorochloroethylene resins, which comprises the following steps of: taking trifluorochlor oethylene, high-purity water, an organic dispersant and an initiator under the condition that the mass ratio of the trifluorochlor oethylene, the high-purity water, the organic dispersant and the initiator is 100:(500-1000): (50-200): (0.1-1); placing the high-purity water, the organic dispersant and the initiator in a reaction kettle, and at a stirring speed of 400-500 rmp, feeding the trifluorochlor oethylene into the reaction kettle; carrying out reaction on the obtained mixture for 4-6 hours under the conditions of 0.2-1 Mpa and 20-30 DEG C; and then continuing to react for 2-4 hours at a temperature of 50 DEG C and at a stirring speed of 100-200 rmp; and carrying out washing and drying on the obtained product so as to obtain a beaded polytrifluorochloroethylene resin with a diameter of 0.5-5 mm. The method disclosed by the invention is stable in polymerization rate and narrow in molecular weight distribution, no dust flying occurs in the process of production, and no further granulation treatment is required; the obtained polytrifluorochloroethylene resin is excellent in performances, and can be prepared into tubes, bars and profiles with more complicated shapes through melt injection molding; and no yellowing phenomenon occurs, therefore, the method has good social, economic and environmental benefits.