179results about How to "Reduce refining costs" patented technology

The invention discloses a method for recycling tin from lead bullion, and belongs to the technical field of pyrogenic process and wet process combined metallurgy. The method comprises the steps that after liguation decoppering processing is carried out on the lead bullion, caustic soda, caustic soda and salt are added into the lead bullion according to the content of the tin in the lead bullion to gather and remove the tin in the lead bullion, and tin-rich slag is obtained; sodium carbonate and reduction coal are added into the tin-rich slag and all tin-containing slag produced by a lead smelting system, and the tin-rich slag and the tin-containing slag generate terne metal through reduction smelting; the terne metal is processed through vacuum distillation to obtain crude tin; highly purified precipitated tin is obtained from the crude tin through electrolytic refining of mixed acid with silicofluoric acid-sulfuric acid as an electrolytic medium, and the precipitated tin is processed through simple smelting to obtain a tin ingot product meeting the national standard. The method sets the precedent for producing tin ingot products through comprehensive utilization of tin resources obtained from lead through smelting, has the advantages of being concise in technology, high in tin product yield, low in processing cost and the like, particularly separates tin alloys through introduction of vacuum distillation, and has the significant advantages in the aspects such as energy conservation and environment protection.

A refining apparatus having magnetically responsive refining elements that can be smaller than the workpiece being refined are disclosed. The refining apparatus can supply a parallel refining motion to the refining element(s) through magnetic coupling forces. The refining apparatus can supply multiple different parallel refining motions to multiple different refining elements solely through magnetic coupling forces to improve refining quality and versatility. New refining methods, refining apparatus, and refining elements disclosed. Methods of refining using frictional refining, chemical refining, tribochemical refining, and electrochemical refining and combinations thereof are disclosed. A refining chamber can be used. New methods of control are refining disclosed. The new magnetic refining methods, apparatus, and magnetically responsive refining elements can help improve yield and lower the cost of manufacture for refining of workpieces having extremely close tolerances such as semiconductors wafers. Refining fluids are preferred. Reactive refining aids are preferred. Electro-refining for adding and removing material is disclosed. A method to use business calculations combined with physical measurements to improve control is discussed. Use of business calculations to change the cost of finishing semiconductor wafers is discussed. The method can help cost of manufacture forecasting for pre-ramp-up, ramp-up, and commercial manufacture. Actively based accounting can be preferred for some applications. New methods and new apparatus for non-steady state refining control are disclosed.

The invention discloses a method for treating fluorine-containing wastewater and recycling fluorine-containing sludge produced by treatment of fluorine-containing wastewater. The method comprises the steps of reacting the fluorine-containing wastewater with calcium chloride under the acidic condition formed by adding a waste acid matter, performing crystallization sedimentation to remove most fluorine ions from the wastewater to form high-purity fluorine-containing sludge, removing dissolved calcium fluoride and other impurities from supernate through alkali sedimentation to form a small amount of fluorine-containing sludge with relatively low purity, then neutralizing the supernate, and discharging effluent, wherein the concentration of fluorine ions of the effluent is lower than 10 mg/L and accords with national discharge standards; drying the high-purity fluorine-containing sludge, then adding the dried sludge and excessive sulfuric acid into a reactor with a stirring device, reacting at 150-300 DEG C to prepare hydrogen fluoride, and condensing and rectifying the obtained crude hydrogen fluoride gas to obtain an anhydrous hydrogen fluoride product.

The invention relates to a method for producing an ammonium magnesium phosphate compound fertilizer, which comprises: taking phosphorus-magnesium waste residue generated during wet-method phosphoric acid refining as a raw material, and adding a small amount of compounds containing Mg<2+> to make up for the deficiency of magnesium in the waste residue; adding ammonia water, taking an alkaline solution as an acidity regulator, and performing mixing and stirring reaction at room temperature, wherein the reaction time is not less than 60 minutes, the stoichiometric mol ratio of the Mg<2+> to NH4<+> to PO4<3-> in the mixed reaction liquid is 1-1.2:1:1, and the pH value of the reaction liquid is controlled to be between 8.0 and 10.0; and performing solid-liquid separation, wherein solid material is the ammonium magnesium phosphate compound fertilizer containing phosphorus, ammonia and magnesium. By adoption of the method to prepare the ammonium magnesium phosphate compound fertilizer, the economic benefit can be increased; the wet-method phosphoric acid refining cost can be reduced; resource waste can be prevented; and the economic benefit can be improved.

The present invention belongs to the field of chemical separating and environment protecting technology, and is especially circular desorbing, shunting, recovering and regenerating process in an adsorbing bed and the apparatus. The technological process includes circular desorbing on hot gas in an adsorbing bed, and by-pass heat exchange and condensing recovery of partial desorbed gas flow. The present invention has the advantages low power consumption, low cost and high purity of the recovered organic matter, and is especially suitable for use in chemical adsorbing and separating process, contaminated gas purifying, organic solvent recovery, etc.

The invention provides a refining and purifying method of long carbon chain dicarboxylic acid. The refining and purifying method is characterized in that the raw material moisture content of a long chain binary acid coarse product is controlled to be smaller than or equal to 1.0 wt%; the content of solvent acetic acid is larger than or equal to 95.0 wt%; the crystallization process adopts three-section gradient cooling, and induction seed crystal is added after second-section cooling to induce crystallization; crystalized filter cake is firstly sprayed by acetic acid, is next washed by water and is then subjected to centrifugal filtering; then the filter cake is washed by the water at environment temperature; an acetic acid solvent generated in the refining process is totally recycled through an azeotropic distillation method; a cleaning solution and a mother solution which are generated in the refining process are totally recycled. The refining and purifying method, high in product yield, low in refining cost and high in purity, of long carbon chain dicarboxylic acid is provided. The total acid content of long carbon chain dicarboxylic acid after being refined and purified reaches99.90%, the single acid content reaches 99.45%, the total nitrogen content reaches 6ppm, the ferric ion content reaches 0.5 ppm, the ash content is smaller than or equal to 10 ppm, and the moisture content is smaller than or equal to 0.16%. The purifying comprehensive yield reaches 98.64%. All quality technical indexes meet a user's requirements.

The invention discloses calcium pressing refining slag for steel production and a preparation method thereof. The refining slag comprises the following components: 30-50% of CaO, 30-50% of Al2O3, not more than 6.0% of SiO2, not more than 2.0% of F<->, 4-6% of MgO, not more than 12% of alkali and not more than 5% of the balance. The production raw materials are industrial wastes rich in calcium oxide and alumina. The preparation method comprises the following steps: grinding the raw materials to powder, mixing according to a certain proportion, and pressing to blocky refining slag rich in CaO and Al2O3 at a predetermined particle size by a high pressure granulator. The refining slag, provided by the invention, has the advantages of stable performance, no degeneration, no water absorption, no dusting, low fluorine, convenience for storage and transportation, and convenience for environmental protection; slugging is promoted and the smelting time is reduced in a steel production process, and the molten steel is refined and desulfurized in a steel discharge process or in an LF furnace.

The invention discloses a method and device for extracting and separating phenolic compounds from coal derived oil. The method comprises the following steps of performing distillation and cutting to obtain phenol-enriched distillation fractions: performing distillation, distillation fraction and cutting on the coal derived oil, and cutting out a phenol-enriched distillation fraction of a certain temperature segment; performing centrifugation, extraction and separation on a solvent: performing centrifugation and separation on the phenol-enriched distillation fraction, an extraction agent and an addition agent so as to obtain a liquid phase containing an extraction agent, wherein a light phase of the liquid phase containing the extraction agent is a dephenolization oil-addition agent solution, a heavy phase of the liquid phase containing the extraction agent is an enriched phenolic compound, and the extraction agent is an aqueous solution of one or more selected from butanone, cyclohexanol, dihydric alcohol and glacial acetic acid; performing centrifugation, backward extraction and separation; recovering the addition agent; recovering reverse extraction agents; and refining crude phenols: performing azeotropic distillation and separation on crude phenol raw materials containing a few extraction agents so as to obtain the extraction agent and crude phenol products.

The invention discloses a method for producing refined moisture diffusion industrial salt based on underground recycling of waste liquid. The method comprises the following steps: (1) mixing waste water of salt production with ammonia alkali waste liquid in proportion; (2) injecting the mixed waste liquid obtained in step (1) into an underground mirabilite type rock salt cavern; after sufficient reaction and natural sedimentation, extracting low-nitrate brine; (3) injecting the low-nitrate brine obtained in step (2) into a reaction barrel, injecting a sodium carbonate solution into the barrel, and adding a certain amount of sodium polyacrylate as a coagulant aid; then, stirring and standing, and removing calcium ions out of the brine to obtain refined low-nitrate brine; (4) carrying out secondary preheating on the refined low-nitrate brine obtained in the step (3), carrying out evaporation, concentration, crystallization and solid-liquid separation, and carrying out centrifugal separation on underflow salt slurry to obtain a refined moisture diffusion industrial salt product; (5) with liquid obtained by solid-liquid separation and centrifugal separation in the step (4) as the waste water of salt production, supplying the waste water into the step (1), blending the waste water with the ammonia alkali waste liquid in proportion, and injecting the mixture into the underground rock salt cavern as a brine extracting source, thus realizing the recycling of waste liquid.

The present invention provides after-oxidation waster-washing separation and adsorption combined process so as to achieve efficient refining of crude sulfate turpentine. According to the present invention, the oxidant is a sodium hypochlorite solution with an effective chlorine content of 3-10%, and the adsorbent is a mixture of modified active carbon and a water absorption molecular sieve; the key of the specific refining method is that the primary after-oxidation waster-washing separation is performed, and then adsorption with the adsorbent is performed to remove irritating odor, such that the organic sulfur content in the crude sulfate turpentine can be efficiently removed, and the total sulfur content can meet the 10 ppm standard required by the industrial application requirement; and with the excessive oxidation, the application of the modified active carbon and water absorption molecular sieve mixture as the adsorbent, and other means, the refining process is simplified, the energy consumption is reduced, and the refining cost is saved.

The invention discloses a bittern or seawater ultrafiltration pre-treatment process and system. The bittern or seawater ultrafiltration pre-treatment process and system can provide filtered water meeting water feeding requirements of nanofiltration. Every process cycle of the bittern or seawater ultrafiltration pre-treatment process sequentially comprises a filtering step, a water producing step, a cleaning step and a discharging step, wherein the cleaning step comprises processes including gas wiping, gas-water backwashing and gas exhausting. Bittern or seawater is filtered through a cartridge filter and precisely-filtered liquor is filtered through a ultrafilter membrane filtering device to produce water; the gas exhausting process comprises that, during a membrane module exhaust process, oilless compressed air is inlet to the water inlet side of membrane yarns, and compressed air and water are mixed and oscillated to act on the surface of the membrane yarns; during the gas exhaust process, the water level decreases continuously, the gas-water washing strengths of the cross sections at different horizontal heights change, so that the membrane yarns can be cleaned from top to bottom. The bittern or seawater ultrafiltration pre-treatment process enables the bittern and seawater to be treated in a membrane filtering mode, thereby reducing the purification cost and simplifying the purification process, and through stable water output, prolongs the service life of nanofiltration membranes and guarantees stable operation of a nanofiltration system.

The invention discloses a device and a method for regulating and controlling ladle bottom argon blowing flow, which mainly solve the technical problems of low control precision and low automation degree of the existing ladle bottom argon blowing flow. The scheme of the invention is as follows: the device for regulating and controlling ladle bottom argon blowing flow comprises a steel ladle bottomargon blowing valve opening degree control PLC and a steel ladle bottom argon blowing flow regulating valve, wherein the ladle bottom argon blowing flow regulating valve is fixedly arranged on a ladlebottom argon blowing pipeline, the ladle bottom argon blowing valve opening degree control PLC is connected with the ladle bottom argon blowing flow regulating valve through a communication cable, and the ladle bottom argon blowing flow regulating valve is an electric valve; the device further comprises a visual sensor, an image processing unit and a steel ladle bottom blowing valve opening degree control unit which are installed above the steel ladle, the visual sensor is connected with the image processing unit through a communication cable, and the steel ladle bottom blowing valve openingdegree control unit is a steel ladle bottom blowing valve opening degree control computer. The molten steel refining cost is reduced.

The present invention adopts the external heating process to heat coal and makes coal continuously coke, so that its first-stage high-temp. pyrolyzed gas can be directly used as raw material for preparing acetylene by means of plasma pyrolysis, and its second-stage high-temp. pyrolyzed gas can be used as flow-forming gas for preparing acetylene by means of plasma pyrolysis. Said invention can utilize low energy consumption to produce acetylene and coke, and the partial high-temp. pyrolyzed gas and acetylene tail gas can be used as heating fuel for continuously coking coal.

This invention relates to a method of fuulyrefined industrial salt. The procedures are that waste water with fluorine is prepared to solution of pH=6-8, then industrial salt is added into the solution to get turbid salt water, pure salt water is got after filtration. The industrial salt water made by this invention can be used as material of clay bittern method to produce cryolite technique, materials can be cyclic used and cost is reduced. The content of calcium ion and magnesium ion in the industrial salt can be reduced from 1-2% to 0.01% and the content of calcium ion and magnesium ion in saturated industrial salt water can be reduced from 3g/l to below 0.03g/l.

The present invention relates to a process for manufacturing coated substrates by providing a substrate, providing at least one mineral material, providing a polysaccharide material comprising one or more polysaccharides, coating the substrate with the at least one mineral material, and coating the resulting pre-coat layer of mineral material with the gel comprising one or more polysaccharides, as well as the coated substrate obtained by this process and its use.

The invention discloses a method for converting carbonic acid type salt lake brine into chloride type brine. The method comprises the following steps that: enabling carbonic acid type salt lake brineto pass through ion exchange resin to remove trace calcium and magnesium ions in the brine and obtain softened brine; pumping softened brine into a first-stage nanofiltration membrane system, applyingpressure to the two sides of a first-stage nanofiltration membrane, to form a pressure difference; enabling parts of water, sodium ions, potassium ions, lithium ions and chloride ions in the softenedbrine to migrate to a low-pressure side from a high-pressure side through the first-stage nanofiltration membrane, enriching the high-valence anions on the high-pressure side to obtain brine rich inthe high-valence anions, pumping the brine rich in the high-valence anions back to the salt lake, wherein the high-valence anions comprise sulfate ions, carbonate ions and polyborate ions; and obtaining chloride type brine containing a small amount of high-valence anions on the low-pressure side.

The invention discloses a test device for simulating smelting and tapping processes of a rotary furnace. The test device comprises a test device frame, wherein a track is arranged at the bottom of the test device frame, a water storage tank trolley is placed on the track, and a water storage tank is placed on the water storage tank trolley; a test platform is arranged above the track, and a molten steel rotary furnace model is placed on the test platform; lifting equipment is arranged at the top of the test device frame and connected with the molten steel rotary furnace model and drives the molten steel rotary furnace model to move in horizontal and vertical directions and incline in the vertical direction; a water circulating pump is fixed on the test device frame, one pipe orifice of the water circulating pump is connected with a water storage tank, and the other pipe orifice of the water circulating pump is connected with the molten steel rotary furnace model. The test device disclosed by the invention can be used for efficiently, conveniently and fast researching the steelmaking process and tapping process of the rotary furnace in a laboratory and has great significance on the researching and developing the steelmaking process, reducing slagging quantity, reducing the refining cost, and the like.

A refining method and refining apparatus, able to shorten the time required for refining and reduce the refining costs in decarburization refining of a chromium-contained molten steel, which refining method for chromium-contained molten steel etc. performing decarburization refining by blowing a gas containing oxygen gas into a chromium-contained molten steel under a vacuum or atmospheric pressure and vacuum, said refining method for a chromium-contained molten steel etc. characterized by having a first step for blowing oxygen gas while making the inside of the vessel a pressure of a range of 400 Torr (53 kPa) to atmospheric pressure, a second step for blowing oxygen gas while evacuating the inside of the vessel to 250 to 400 Torr (33 to 53 kPa), and third step for blowing gas while evacuating the inside of the vessel to not more than 250 Torr (33 kPa). Further, a refining method and refining apparatus for an ultra-low carbon chrome melt characterized by performing a first vacuum refining until the third step, then restoring the pressure in the vessel to at least 400 Torr (53 kPa), then performing second vacuum refining while making the bottom blowing gas blow rate at least 0.4 Nm<3>/min per ton steel.