116results about How to "Less process investment" patented technology

The invention relates to a method for treating wastewater and discloses a method for treating wastewater in an automobile manufacturing plant. A method of pretreatment, two-stage physicochemical treatment, biochemical treatment and advanced treatment is adopted to treat wastewater. The method for treating wastewater in the automobile manufacturing plant has little investment, small occupied area and low operating cost and has good integrated treatment effect on industrial wastewater and domestic sewage discharged from the automobile manufacturing plant.

The invention relates to a medium-heavy automobile flange die forging process and a punching and calibrating composite die thereof, which belong to a forging process in the field of manufacturing of machines, in particular to an automobile flange closed die forging process and a punching and calibrating composite die thereof. By the process and the composite die, the problems of low quality, a great number of production processes, low material utilization rate and the like of the conventional production process forgings are solved. The one-time finish forging forming of a closed finish forging die is used, the head of a die ejector beam is manufactured into a boss of the die, the web thickness is reduced, and punching and calibrating are completed in one step on the special punching and calibrating composite die. The punching and calibrating composite die comprises a calibrating male die, a female die, a punch, a belleville spring, a spring compression plate, a pull rod and the like. The die has low invested cost, a reasonable and simple process flow, high product quality, small machining amount and high productivity, and obviously lowers the production cost of products.

The invention relates to a preparation method of a rosin modified phenolic resin. The method comprises the following three steps of reactions: 1. performing condensation of tert-butylphenol, bisphenol A, tung oil and solid formaldehyde under the action of catalyst magnesium acetate and lime to generate polymer of hydroxymethyl tert-butylphenol; 2. performing an addition reaction with rosin to generate an addition product; and 3. performing esterification of the addition product, pentaerythritol and glycerin under the action of catalyst zinc chloride to generate the rosin modified phenolic resin. The preparation method adopts proper raw material proportioning, reaction temperature, reaction time, catalyst and other technical conditions, thus during the production process, the resin viscosity can be effectively controlled, and the operation is simple and flexible and has good effect. The quality of the product is increased, the oil solubility of resin is good, the oil medium viscosity is high, the normal heptane capacity is 4.5ml/g or more; and the prepared paint film ink has good water resistance and alkali resistance, high hardness, excellent anti-after-binding performance, quick-drying performance, lightness and strong adhesive force. Therefore, the preparation method of the invention is applicable to industrial production.

The invention discloses a new production process of a large seamless steel pipe. The process comprises the following steps: pipe billets are preheated to the temperature of 1050-1290 DEG C by a heating furnace, and delivered to a three-roll skew rolling piercing mill for piercing by a skew roll table conveying mechanism to finish diameter expansion and wall reduction rolling, the maximal ratio of diameter to wall D/S is over 32, and hollow billets are produced; the hollow billets are delivered to a three-roll skew rolling elongating finishing mill by a shift oblique orbit conveying mechanism to finish diameter expansion and wall reduction rolling or diameter reduction and wall reduction rolling, and the pierced billets are rolled, straightened, cropped end, cut to length, defect are detected, and the finished products are obtained after passing inspections. The new production process also perfects and improves the conventional three-roll skew rolling seamless steel pipe process, solves the problems of not rolling thin walls and great extension in the three-roll skew rolling process, the diameter expansion and wall reduction rolling can be carried out, and the diameter reduction and wall reduction rolling can be carried out. The new production process is especially suitable for rolling large and oversized seamless steel pipes (Phi is 500-2000mm), the ratio of single reduced diameter and expanded diameter is more than 30%, the reduced wall diameter is more than 70%, and the reduced wall thickness is 5-7 times of that of a longitudinal pipe rolling mill.

The invention provides a comprehensive treatment method for high-mud content high-combination rate mixed copper ore, which comprises the following steps of: grinding the mixed copper ore and roughing copper sulfur so as to obtain copper sulfur ore and tailings; concentrating the copper sulfur ore to obtain the copper ore and middlings; concentrating the copper ore to obtain the copper concentrate, and performing copper rough concentration on the middlings to obtain the copper ore and middlings simultaneously; concentrating the copper ore to obtain the copper concentrate, and performing copper scavenging on the middlings to prepare sulfur concentrate for recovery; performing magnetic separation on the middlings subjected to the copper scavenging so as to obtain magnetic for recovery, and returning the tailings to copper sulfur roughing. In the method, the pyrite (sulfur concentrate) is separated from the copper concentrate successfully in the flotation process for the first time so as to obtain high-quality copper concentrate; meanwhile, a large amount of magnetic pyrite is separated from the middlings subjected to flotation through the magnetic separation step, the iron sulfur content in the middlings is reduced to the greatest degree, the middlings become high-quality sulfur concentrate which can be directly used as raw materials for producing sulfuric acid, the tailings subjected to magnetic separation return to the system for recycled production, and valuable resources are fully recycled.

The invention relates to a separation and analyzing method for high purity cellulose without contamination, it uses wood fiber as material; it decomposes the wood cellulose and semi-cellulose in system with acetic acid and nitric acid but without chlorine and contamination, acquires the cellulose with high purity. The invention uses acetic acid and nitric acid as catalyst, the weight percentage density of acetic acid is 80%, the weight of nitric acid is 1-8% of the acetic acid weight, they are processed for 18-22 minutes in 100-120deg.C, separates them and acquires the cellulose preparations; then carries on detection to the cellulose preparations with special viscosity, molecular weight, FT-IR, CP-MAS13C-NMR and energetics analysis. The process is simple and quick, has no contamination, the cellulose has a high purity, which can be applied to the separation and analysis of cellulose in wood fiber material.

The invention relates to a liquid-state high-lead slag side-blowing water-gas reduction process, and belongs to the technical field of metallurgy. The process mainly comprises the steps of: directly injecting liquid-state high-lead slag melt subjected to oxidization smelting by a bottom blowing furnace into a reduction furnace, and directly reducing liquid-state high-lead slag into secondary lead bullion through side blowing in the reduction furnace by adopting combination of water gas and oxygen-enriched air. The reduction process is simple in technology, low in production cost and good in reduction controllability, and helps to realize low-pollution low-carbon-economy industrialized production.

The invention discloses a recycling treatment process for chlorohydric acid pickling liquid waste. The process comprises the following steps: adjusting the acidity of CaCO3 of the chlorohydric acid pickling liquid waste to 99.65-124.56g/L; adding ferrous chloride so as to enable ferrite to be in a saturation condition; heating to the bubble point, then feeding the mixture into a rectifying tower and separating, wherein the pressure in the rectifying tower is 61.05-67.50Kpa; recovering a 10-15% diluted hydrochloric acid liquid and ferrous chloride crystals. Through reasonable parameter control and decompressing and rectifying processes, hydrochloric acid liquor applicable to acid pickling steel pieces as well as a coagulant capable of being used for sewage and wastewater treatment or a chemical raw material ferrous chloride can be recovered just by means of materials generated in the steel piece acid pickling process without spending other raw materials, so that the cost is greatly saved. The process is process-investment-saving, low in energy consumption and easy for mastering of operation, and can be continuously operated or intermittently operated in batches, thereby realizing automatically controlled operation.

The invention belongs to the ironmaking field, and relates to a multilayer slag smelting reduction ironmaking method and an apparatus thereof. The method is characterized in that in a vertical-type melting furnace, a mixture of combustion-supporting gas, ore powder and a flux and combustion-supporting gas as well as fuel and combustion-supporting gas are respectively performed with fluid coupling to an upper spray gun (1), a middle layer spray gun (2) and a lower layer spray gun (3) arranged on the vertical-type melting furnace, the prepared materials are simultaneously injected to the vertical-type melting furnace by the three layers of spray guns to generate molten iron and slag through a reaction, a fusing slag layer (6), a reducing slag layer (7), a standing slag layer (8), a molten iron layer (9) and a molten iron layer (10) are respectively formed in the furnace from top to down; and iron or slag can be discharged at an iron/slag outlet (4) arranged at the molten iron layer (9) positioned at lower part of the furnace. The method is the one step method smelting reduction ironmaking method with advantages of high efficiency, energy saving and low cost, the apparatus design is simple, and is easily realized.

The invention is a technics pressing wheel covets with sheet material instead of hot rolling steel. Its features lay on that: first process the sheets into strip material and tempering at 580 to 620 deg. C; and then with oid press over 500 T, obtain the product through rolling, covering, head cutting, close dot welding, welding, pre-compressing, expanding, welding gap abrading, compressing, punching the air valve hole and assembling shaping. Pressing wheel covets with this technics will save hot rolling steel while the sheet material price is 40 percent lower than it of hot rolling steel, and so to lower the cost by 5 to 11 percent. Its production efficiency is the same as section steel production line with products of reliable quality, moreover it is of low investment without any large facilities and just a set of wheel covet moulds and an oil press is needed.

The invention discloses a coking middling coal dms-flotation combined separation process, and belongs to the technical field of coking middling coal separation. The process comprises the steps of 1, primary size mixing flotation operation, 2, hierarchical dewatering operation, 3, crushing and screening operation, 4, coarse slime separation operation, 5, desliming operation, 6, ore grinding dissociation operation, 7, secondary size mixing operation and 8, secondary flotation operation. The coking middling coal dms-flotation combined separation process is simple in procedure, small in investment, low in energy consumption, little in operation cost, high in separation efficiency and remarkable in economic benefit.

The invention relates to a method for treating sewage by adopting a biological-physical combined method. The method comprises the following steps of: making organic sewage water pass through an air floatation filter tank, a regulating pond, a zymolysis pond, an aeration biological pond and a product retention basin; and fermenting the organic sewage under the actions of microflorae, sludge, volcanic rock and the air, decomposing, purifying and the like to produce biologically active water which can be recycled in the growing process of animals and plants. The system has the advantages of capability of realizing full-automatic control, easiness in operating, small technical investment, low sewage treatment cost, high sewage treatment efficiency and stable performance.

The invention discloses a method for preparing an environmentally-friendly flame retardant fiberboard by utilizing xylose waste residue, comprising the following steps: centrifuging the xylose waste residue, separating the liquid in the xylose waste residue; controlling the water content of the waste residue to be 50-60% and the fiber mesh number to be 30-100 meshes; filtering water in fiber for 18-22s; applying phosphorus flame retardant to carry out flame retardant treatment, wherein, the additive amount is 10-15% of the weight of the dried fiber configured in step a; applying urea formaldehyde resin, waterproofing agent and curing agent, and evenly stirring, wherein, the applying amount of the urea formaldehyde resin is 10-14% of the weight of the dried fiber, the applying amount of the waterproofing agent is 1-3% of the weight of the dried fiber, and the applying amount of the curing agent is 0.5-3% of the weight of the dried fiber; drying, controlling the water content of the fiber to be 8-14%, and then storing into a storage bin; prepressing the dried fiber into a plate blank; prepressing, and feeding the prepressed plate blank into a hot press for hot-pressing; and trimming, polishing and grading the plate blank after the plate blank is aired to the room temperature to obtain the finished product. The method of the invention reduces a fiberboard production process link,does not need the steps of softening and hot grinding by utilizing the xylose waste residue to produce the flame retardant fiberboard, thus reducing the process investment, lowering the production cost, and having obvious economic benefits.

The invention belongs to the technical field of polycrystalline silicon production, and relates to a chlorosilane-containing slurry treatment method and a chlorosilane-containing slurry treatment system. The chlorosilane-containing slurry treatment method disclosed by the invention comprises the following steps: chlorosilane-containing slurry gets into a slurry collection tank, and is kept still,and by utilizing the incompatibility and density difference between components in the slurry, the slurry is formed into supernate and bottom turbid liquid in the slurry collection tank; the supernateis discharged out from a plurality of chlorosilane outlets which are arranged at different heights on the slurry collection tank, sequentially passes through a filter and a delivery pump, and gets into a chlorosilane recovery device; and the bottom turbid liquid gets into a washing device from the bottom outlet of the slurry collection tank under the effect of pressure difference and is washed. According to the invention, the chlorosilane recovery rate is high, the quality of recovered chlorosilane is better, and the requirement of electronic-grade polycrystalline silicon production on qualitycan be met. Moreover, the investment of the process is low, safety is good, the continuous operation period is long, later operation and maintenance costs are low, the investment recovery period is short, and risk is low.

The invention provides a method of feeding powdered activated carbon in the specific position for solving the problems occurring in the biochemical treatment process of waste water generated in paper making; and simultaneously, an anoxic pool is arranged for removing nitrates in the water, controlling TN in the discharged water and reducing the sludge bulking probability. The pretreated waste water generated in paper making automatically flows into or is lifted by a water pump to enter an anoxic zone of a high-efficiency biological strengthened treatment pool; the waste water treated in the anoxic zone automatically flows into an aerobic zone; the waste water treated in the aerobic zone automatically flows into a settling zone; and the water treated in the settling zone automatically flows into or is lifted by the water pump to enter subsequent treatment units or is discharged. The reactor enables the biochemical treatment unit of the waste water generated in paper making to have the advantages of stable operation, better quality of the discharged water, reduced operation cost and the like.

A process for purifying lithium tetraborate including preparing 11-25 mass% over-saturated aqueous solution of lithium tetraborate, thermal reflux for 2-5 hr while stirring, solid-liquid separation and drying solid-phase substance. Its advantages include simple process and no environmental pollution.

The invention provides a light truck painting process adopting water-based BIB2 matched with solvent type 1K varnish and belongs to the technical field of vehicle paint spraying. The process is characterized by including the steps of wiping clean, blowing with deionized wind, painting B1 outer surface, painting B2 inner surface, painting B2 outer surface, performing hot flash off, conducting forced cooling, painting IK varnish, levelling and drying; the B2 inner plate painting process also serves as the normal-temperature levelling process of B1 outer plate paint film, the levelling time is 600-720s; the hot flash off process is divided into the dewatering part and the high-temperature flash off part, the dewatering temperature is 40-45 DEG C, the dewatering time is 210-240 s, the high-temperature flash off temperature is 80-90 DEG C, and the high-temperature flash off time is 210-240 s; after the hot flash off process is finished, 1K varnish painting is conducted. The process requiresless investment, the work period is short, the place for automobile improvement covers a small area, the production rhythm is fast, and the energy consumption is small.