96 results about "Liquation" patented technology

The invention discloses a method for producing zinc sulfate heptahydrate, crude tin and crude lead by using tin smelting dust. The method comprises the following steps of: (1) pretreating the raw material; (2) leaching with a dilute sulphuric acid to separate out zinc; (3) purifying the crude zinc sulfate solution, preparing zinc sulfate heptahydrate; (4) performing electric furnace smelting on the tin-rich residue to prepare a tin-lead alloy; (5) adopting the conventional liquation process (the temperature is 500-600 DEG C) and the agglutination method (the temperature is 230-240 DEG C) to refine the tin-lead alloy and increase the Sn-Pb grade of the alloy to 94%-96%, and sending the refining residue back to the electric furnace to perform smelting and dosing treatment; and (6) performing high temperature vacuum distillation to produce crude tin and crude lead. By adopting the method, the tin smelting dust can be effectively utilized, the resource can be saved and metals such as tin,lead, zinc and copper can be recovered together.

The invention relates to an anti-rut asphalt additive, a method for preparing the same and a method for using the same. Polyethylene resin and polypropylene resin are adopted for using simultaneously; and through the use of liquation, cutting, mixing and extrusion pelletization technology at high temperature, compatibility between the materials is improved so as to further improve high-temperature stability of an asphalt surface layer. In order to reduce material cost, waste polyethylene resin and waste polypropylene resin can also be used so as to achieve the aims of reducing cost, realizing recycling of waste and reducing environmental pollution simultaneously.

The invention provides a production method of high-toughness high-isotropy large-section hot working die steel. The method comprises the following steps: carrying out primary homogenization on a steel ingot subjected to electroslag remelting at 1260-1300 DEG C for 5-8 hours; carrying out three-way forging on the steel ingot subjected to primary homogenization at the temperature of 900 DEG C or above, wherein the three-way forging temperature is lower than the first homogenization temperature; carrying out secondary homogenization on the steel billet subjected to three-way forging at 1260-1300 DEG C for 10-20 hours; carrying out upsetting and rolling finish forging on the steel billet subjected to secondary homogenization, wherein the initial forging temperature of the upsetting and rolling finish forging is 1150 DEG C or below, and the finish forging temperature is 850-950 DEG C; and carrying out grain refinement and annealing to obtain the product. By organically combining the double homogenization and double forging, the method creates dynamic conditions beneficial to carbon and alloy element diffusion, and thoroughly eliminates the liquation carbides in the steel billet and the zonal structures generated by dendritic segregation.

The invention discloses a Phi 500-650mm Cr6 type forged-electroslag-steel cold-rolled work roll blank forging and deforming technology. The technology includes the steps of converter producing plus LF refining plus VD vacuuming, continuous casting of round blank, hot annealing of electronic blank, clearing, electroslag remelting, annealing of electroslag ingot, forging and annealing after forging, wherein four-fire mode production is adopted in forging, upsetting and drawing out deformation methods are adopted in the first fire time, forging under great pressure is adopted in the second fire time, and forging to forming in the third and fourth fire time. Temperature and heat preservation time in high-temperature diffusion are key to control in forging, furnace return temperature and time in each fire time of forging and deformation and final forging temperature of each fire time are controlled. The spheroidized structure of the produced Cr6 type forged-electroslag-steel cold-rolled work roll blank is 2-3 in grade, carbide mesh is less than or equal to 2.0 in grade, carbide strap and liquation are below 1.0 in grade, total non-metallic inclusions is less than or equal to 2.0 in grade, flaw detection eligibility rate is increased from original 75% to 95%, carbide distribution is small and diffused, and long service life is achieved.

The invention relates to a shot blasting check method for surface defects of blades. Turbine blades processed by the method can clearly show various surface defects easily generated in materials during processes, and specifically the method can check that the defects are the liquation of the materials, various processing burns, hardening and the like in the processes. The method is characterized in that the method for surface shot blasting achieves the show of the surface defects of the blades.

The invention discloses a method for refining bismuth from bismuth oxide slags. The bismuth oxide slags and reduction agents are subjected to reduction smelting, liquation decoppering, primary lead removal through chlorine, vacuum distillation for silver removal, secondary lead removal through chlorine, high-temperature refining for dechloridation, and caustic soda flakes adding for tellurium removal, and finally refined bismuth is obtained. Alloy containing silver, copper, bismuth, lead and the like directly enters the decoppering procedure, wet pretreatment is omitted, the decoppering procedure is simplified, copper matte and silver-zinc crusts are prevented from being generated, the usage amount of nitric acid in a wet section is reduced, emission of nitric oxide in the nitric acid dissolving process is reduced, and pollution to the environment is reduced; after a zinc adding and silver removal technique is changed into the vacuum distillation for physical silver removal technique, the silver-zinc crusts which are difficult to treat are eradicated, physical separation of silver and bismuth is achieved to the maximum extent, and the recovery rate of silver is increased; and the usage amount of coal gas and auxiliary materials is reduced, the labor intensity of workers is relieved, the production period of the refined bismuth is shortened, the production cost of the refined bismuth is reduced, and the direct recovery rate and the recovery rate of the refined bismuth are increased.

The method relates to a sewage water and sludge treatment technology, in particular to a process and equipment for treating municipal sewage water and sludge by utilizing a nepheline nucleated glass technology. The invention solves the problems that the prior incinerator has secondary pollution and upflowing black smoke, etc. in the process of treating the municipal sludge. The process comprises the following steps that: nepheline nucleated glass raw material is used to absorb and filter the sewage water, then sludge water is rapidly separated; upper-layer water is disinfected by steam, volatilizes odor and is further filtered to drinking water; underlayer slurry is mixed with diesel oil and olefin to be used as fuel of a liquation furnace; and residue falls on a hearth and is mixed with the added nepheline nucleated glass raw material to fuse superior nepheline nucleated glass particles, which can be used to produce nepheline nucleated glass and metal mixed powder metallurgical products, mechanical members and building materials. The equipment has a high energy formula of combining a superhigh temperature and bottom inserting-type three-phase electrode liquation furnace and nepheline and realizes the separation of hydrogen and oxygen in the water and the heat release of hydrogen combustion. The process and the equipment have no requirement on the water quality of incoming water, achieve the recovery of purified water and the emission of air without odor and realize the added value utilization of the residua.

The invention discloses a method for reducing a carbide liquation level in high-carbon chromium bearing steel. The method comprises the following steps: (1) the superheat degree of continuous casting steel liquid is controlled in a range of 10-25 DEG C in smelting; (2) the temperature of a heating section and the temperature of a soaking section of a continuous casting steel blank obtained after heating and smelting are controlled; (3) the heating time is controlled according to the section size of the continuous casting steel blank; and (4) the flame spraying angle and the burning time of a heating furnace are controlled by a following manner in the burning reversing period of the heating furnace by using an adjusting plate in a nozzle; the flame spraying angle is uniformly adjusted from m degrees to n degrees; in reversing, the adjusting plate in the nozzle is transferred to the original position; m is 9-11; and n is 14-18. Compared with the prior art, the adjusting plate is only required to be added on the burning nozzle of the heating furnace, so that the burning airflow angle is slightly adjusted without transforming equipment and largely adjusting a process, and the temperature uniformity of the casting blank heated in the furnace can be guaranteed so as to achieve the control or reduction of the carbide liquation level in the bearing steel.

The invention discloses a collagen membrane medical dressing, which is prepared in the way that: 1swung dash10 parts of sodium carboxymethylcellulose and 15swung dash150 parts of deionized water are mixed in a reaction bulb into the transparent thick state; 0.05swung dash0.5 part of resina draconis and 0.2swung dash2 parts of polyvidon are mixed and prepared into solid dispersoid through a liquation method; 0.05swung dash0.5 part of collagen and 0.1swung dash1 part of starch are added into 1swung dash5 parts of glutaraldehyde solution, are stirred to dissolve at 20 swung dash30 DEG C, then are mixed with the prepared sodium carboxymethylcellulose solution, and are stirred at 30swung dash50 DEG C, so a pasty mixed liquor is prepared for standby application; and 0.05swung dash0.5 part of pseudo-ginseng and 0.25swung dash2.5 parts of solid dispersion are added into the pasty mixed liquor, and are uniformly mixed at 30swung dash50 DEG C, the pH of the pasty mixed liquor is controlled between 6swung dash8, the pasty mixed liquor is poured into a die to form, and is dried in a drying oven, and the collagen membrane medical dressing product is produced only after the dyestripping.

The invention relates to the field of ferronickel-based alloy welding, particularly to a ferronickel-based precipitation strengthening austenite alloy (J75) joint heat-affected zone grain boundary liquation crack control method. The method solves the problem ferronickel-based alloy joints are prone to forming relatively wide gamma'-depleted zones or grain boundary liquation cracks. The ferronickel-based alloy welding, particularly to a ferronickel-based precipitation strengthening austenite alloy joint heat-affected zone grain boundary liquation crack control method is implemented through vacuum electron beam welding and composed of the technological processes of pre-welding base metal treatment, vacuum welding chamber internal clamping and fixing, welding chamber vacuumizing, positioned welding, single-cycle welding with electron beam deflective scanning, post-welding modification welding and post-welding electron beam defocused welding joint scanning. Ferronickel-based alloy joints welded through the method have no gamma'-depleted zones and grain boundary liquation cracks on the heat-affected zones, are good in surface forming and achieve a joint strength higher than 980 MPa or even 1030 MPa, a strength coefficient of base metal higher than 0.9 and an impact toughness (akU) higher than 980 KJ/m2 or even higher than 1020KJ/m2.

The invention relates to a method for the continuous casting of a metal strand in a continuous casting plant, a strand being withdrawn from an in-line die, supported in a strand support unit, cooled by a coolant and optionally metallurgically reduced, thermodynamic changes in the entire strand being calculated in a mathematical model containing a thermal conduction equation. The aim of the invention is to provide a method which can be used to improve the product quality of a metal strand, for example by reducing the porosity and/or liquation and by improving the surface quality and form stability. Said aim is achieved by a method, according to which the natural shrinkage of the strand is calculated in real time in the mathematical simulation model, taking into consideration the physical parameters of the metal, the temperature in the casting distributor, the frequently measured withdrawal speed, the cooling of the strand and the thickness of the strand and strand guide rollers of the strand support unit, said rollers being placed against the strand, are set by taking into consideration the natural shrinkage of the metal strand.

The present invention discloses a method for physically refining solar grade silicon comprises: firstly, by using a vacuum induction furnace, selecting a high oxidizing crucible to avoid carbon pollution; secondly, conducting the vacuum-pumping during the heating process; thirdly, injecting a protective gas, after the smelting temperature reaches a predetermined temperature, the powerful oxidizing gas (chlorine) is injected into the bottom of the crucible; fourthly, producing chemical reaction with the powerful oxidizing gas and impurity such as Fe—Al—Ca—P—V, so that the reaction resultant is gasified, while the power oxidizing gas stirs with the metallic silicon liquation, and preserving the temperature; fifthly, injecting the refined metallic silicon into a pouring box to enter into a oriented crystallization procedure. The present invention has following advantages: being easy and convenient to be implemented, rapid heating, no pollution, and the purity of the silicon material refined by using the method in the present invention can be graded to 5N or more.

The invention relates to the technical field of processing equipment for waste circuit boards/waste enameled wires, and discloses continuous processing equipment for waste circuit boards/waste enameled wires on the basis of a pyrolysis liquation principle. The continuous processing equipment comprises a furnace with a heating chamber in the furnace and a furnace container; the furnace container isplaced in the heating chamber, and the heating chamber is provided with a heating ring chamber surrounding the periphery of the furnace container; the interior of the furnace container is provided with a processing chamber for conducting pyrolysis liquation on the waste circuit boards/waste enameled wires, and a preheating area, a pyrolysis area, an gasification area and an aggregation area are sequentially formed in the processing chamber in the direction from top to bottom; and dehydration preheating processing is conducted in the preheating area, organic matter in the waste circuit boards/waste enameled wires is decomposed in the pyrolysis area, coke formed by decomposition is gasified and alloys are separated in the gasification area, and metals separated from the alloys are aggregated in the aggregation area. Accordingly, recycling of the metals in the waste circuit boards/waste enameled wires is achieved, the resources are fully utilized, the processing mode is capable of achieving environmental protection and energy saving, and existing of dioxin is thoroughly eradicated.

The invention discloses a process for producing a steel-framed plastic clad pipe with a plastic end head and products thereof. The process has the following beneficial effects: since an injecting end head is arranged, the problem that the steal-framed plastic clad pipes are hard to be spliced is solved; as the steel-framed plastic clad pipe provided by the process, the steel frame and a plastic end face connector are connected into a whole body through liquation, the phenomenon that the steel-plastic interface of the end face of the clad pipe peels is eliminated; and the reliability is greatly improved. Meanwhile, the process has the advantages of saved materials, easy manufacture, low installation cost, controllability of the liquation pressure, less impact by human factors, easy quality assurance, etc.

The invention discloses a continuous manufacture method of a zinc-clad steel grounding electrode and belongs to the manufacture method of metal materials. The prior art has the defect of low production efficiency and the prepared zinc-clad steel grounding electrode has the defects of poor performance and short service life. In the invention, round steel after acid cleaning is carried out on round steel, the round steel is cold drawn to a required diameter and polished; then the round steel is heated to the temperature between 200 and 300 DEG C, enters the zinc liquid in a liquation furnace and is combined with the zinc liquid; finally, the round steel comes out from the zinc liquid in the liquation furnace and forms the zinc-clad steel grounding electrode the inner core of which is steel and the outer coating is zinc by a crystallizer. The zinc of the coating is tightly combined with the steel of the core layer and is hard to be separated; the contact resistance between the zinc of the coating and the steel of the core layer is low; the thickness of the core layer is easy to be controlled and can play the role of protection on the devices and pipelines on an anode; moreover, the production efficiency is high.

Copper sheet grating of lead acid battery is produced from casting method. The method includes steps: installing lead rings for positioning copper web as basal body; the thickness of the ring is same as the thickness of lead layer of cladding copper sheet grating; placing the copper web with rings installed to a die; heating the die to 328-600 deg.C, casting lead liquation into the die; after lead liquation and the die are cooled, the blank of copper sheet grating is taken out; cleaning out burrs of air flue on the blank; planishing redundant lead at positioning pinholes on the blank, and closing pinholes so as to produce product of copper sheet grating. The dedicated die includes two pieces of relevant dies. Being in shape same to copper web, the groove in size larger than section of copper web is located on junction plane. There are pins for positioning copper web on two pieces of die to fix copper web at cavity center of die.

The invention relates to a method to deoxidize and purify titanium or titanium alloy. It adopts rare earth as element purifying agent to take deoxidizing and purification process to titanium or titanium alloy. The agent includes La 35-55wt%, Ce 25-35wt%, Nd 5-25wt%, Pr 8-10wt%, and Y 4-5wt%. The added quantity agent is 0.01-0.1% of the weight of titanium metal liquation. The titanium or titanium alloy is melted in vacuum middle frequency induction furnace lime crucible. When the temperature reaches to 1650-1720 degree centigrade, the agent would be added and quieting for 15-25 minutes and casting to gain the titanium or titanium alloy with low oxygen content.

A method for treating sulfur slag comprises the following steps of: performing liquation treatment on sulfur slag containing 65-73% of tin and 6-15% of copper on the crude tin liquid in an iron pot in the range of 500-700 DEG C, thereby obtaining liquid crude tin and liquation slag containing 48-60% of tin and 8-23% of copper, recovering the liquid crude tin in the pot and completely oxidizing the liquation slag by industrial oxygen at a high temperature into mixed dust of copper oxide and tin dioxide, leaching the mixed dust for 2-3 hours under conditions of normal temperature and normal pressure, 70-120 g/L initial acid, and then filtering; reducing and smelting the filter residue to obtain crude tin, and concentrating, crystallizing and separating the filtrate to produce copper sulfate pentahydrate or performing electrolysis to produce electrolytic copper; and then returning the crystallization mother liquor or the liquid after electrolysis to the leaching process for liquid preparation. The method provided by the invention is capable of directly recovering most metal tin and realizing recovery of tin and copper in the sulfur slag without generating wastewater, waste gas and waste residues.

The invention discloses a steel rolling method for producing bearing steel based on a pusher-type heating furnace. The steel rolling method comprises the following steps: adjusting temperature of each section of the pusher-type heating furnace, wherein the furnace temperature of a preheating section of the pusher-type heating furnace is controlled to be between 800 and 850 DEG C through a nozzle, the furnace temperature of a heating section II is controlled to be between 1050 and 1180 DEG C, the furnace temperature of a heating section I is controlled to be between 1210 and 1260 DEG C, and the furnace temperature of a soaking zone is controlled to be between 1210 and 1260 DEG C; spraying high-temperature protective coatings on side faces of the billet, and flatly pushing the billet into the pusher-type heating furnace for heating, wherein the accumulated heating time of the billet in the heating section I and the soaking zone is controlled to be not less than an hour, and the total heating time in the furnace is controlled to be not less than 3 hours; rolling the billet heated by the pusher-type heating furnace in a rolling mill. According to the steel rolling method, the heating temperature is raised to the greatest degree under the conditions that carbide liquation is qualified and over-burning or adhesion on steel is avoided, and the temperature preservation time is shortened.

The invention discloses a method for preparing an intermediate alloy for producing a key alloy wire, which comprises the following steps: placing high-purity gold of which the purity is not lower than 5N and micro-alloy element with the adding amount of not more than 1 percent into a vacuum induction melting furnace, introducing a protective gas into the furnace under the high vacuum condition (10Pa), inductively heating the materials by using vacuum intermediate frequency, and quickly chilling the molten alloy at a high temperature by adopting a leakage pouring process to form small granular (similar to ball shape) intermediate alloy. The intermediate alloy prepared by the method has even granular components, does not cause liquation, has no pollution, does not need to process, and is convenient to use. The method for preparing the intermediate alloy for producing the key alloy wire solves the problems of difficult control for burning trace added components and even distribution of alloy elements, and provides a high-quality blank for subsequent processing of superfine wires.