32results about How to "Prevent sticky residue" patented technology

The invention discloses a method for smelting a vanadium-aluminum alloy by an electro-aluminothermic process. The method comprises the following steps of adding mixture into an electric arc furnace by stages after uniformly mixing vanadium oxide, an aluminum reducing agent and a slag forming constituent, and smelting by sequentially carrying out an aluminothermic reduction; and removing slag, finishing and crushing after completing the smelting, and thus obtaining the vanadium-aluminum alloy. According to the method disclosed by the invention, the electro-aluminothermic process is adopted for smelting at stages, the concentrated releasing of reaction heat can be effectively avoided, the splashing situation during a reaction process can be effectively relieved, the phenomenon that alloy exists in slag can be reduced to a large extent, the reaction process is controllable, and the method is particularly suitable for large-scale industrial production.

The invention discloses a method for smelting a vanadium-aluminum alloy by an electro-aluminothermic process. The method comprises the following steps of adding mixture into an electric arc furnace by stages after uniformly mixing vanadium oxide, an aluminum reducing agent and a slag forming constituent, and smelting by sequentially carrying out an aluminothermic reduction; and removing slag, finishing and crushing after completing the smelting, and thus obtaining the vanadium-aluminum alloy. According to the method disclosed by the invention, the electro-aluminothermic process is adopted for smelting at stages, the concentrated releasing of reaction heat can be effectively avoided, the splashing situation during a reaction process can be effectively relieved, the phenomenon that alloy exists in slag can be reduced to a large extent, the reaction process is controllable, and the method is particularly suitable for large-scale industrial production.

The invention provides a slag binding agent for preventing a slag ladle as well as a production process thereof. The production process comprises the following steps: cooling an aluminum-silicon carbide-carbon brick used by a torpedo ladle to 0.1-29.5 DEG C; placing the brick in a PC0606 jaw crusher to be crush to 5-50mm particles; then, adding the particles into a 4R3216 Raymond mill to be processed to powder which is below 3mm; mixing the powder with steel slag micropowder which is below 3mm in mass percent ratio of 15:85; and placing the mixture in a VI type forced stirring mixer to be uniformly stirred and mixed to obtain the slag binding agent, wherein the control time of adding 1 ton of materials is 15 minutes, and the stirring time is 15-20 minutes. When the slag binding agent is used, water is added into the inner wall of an empty slag ladle through a spray gun of a PB type semidry method gunning machine to spray, and the coating thickness is 0.5-2cm. The water addition of water added to spray accounts for 8-12% of total weight of the slag binding agent used.

The invention relates to the technical field of metallurgy, in particular to a torpedo ladle slag line zone repair material. The repair material comprises the following components in percentage by mass: 40 to 80 percent of aluminum silicon carbide carbon brick waste, 10 to 40 percent of third-grade brown aluminum oxide, 1 to 6 percent of calcium aluminate cement, 2 to 8 percent of clay, 1 to 8 percent of silicon carbide material, 0.01 to 0.04 percent of polypropylene fiber and balance of inevitable impurity. The torpedo ladle slag line zone repair material provided by the embodiment of the invention has the advantages that the calcium aluminate cement can improve the normal temperature physical strength of the repair material; the clay can improve the viscosity of the repair material and the construction is facilitated; the silicon carbide can further improve the slag corrosion resistance of the repair material, the repair material is enabled to not stick slag and the times of use are improved; the polypropylene fiber can reduce the drying time of the repair material after construction, improve the volumetric stability during baking or use and prevent burst. The torpedo ladle slag line zone provided by the embodiment of the invention improves the slag corrosion resistance of the torpedo ladle slag line zone repair material; since a great amount of aluminum silicon carbide carbon brick waste is adopted, the use cost of the repair material is reduced.

The invention discloses a chip-size package and a manufacturing method thereof. The chip-size package comprises: an encapsulation compound having opposite first and second surfaces, a first encapsulation compound disposed in the encapsulation compound and exposed to the encapsulation compound. and the conductive bump on the second surface, the chip embedded in the encapsulant and exposed on the first surface of the encapsulant, the dielectric layer provided on the first surface of the encapsulant, the conductive bump and the chip, The circuit layer arranged on the dielectric layer, the conductive blind holes arranged in the dielectric layer to electrically connect the circuit layer, electrode pads and conductive bumps, and the barriers arranged on the dielectric layer and the circuit layer solder layer. Therefore, other electronic devices can be directly externally connected through the conductive bump to form a stack structure, which effectively simplifies the manufacturing process.

The invention discloses a deep desulfuration method for magnesium-based composite jetted molten iron. The deep desulphurization method comprises the following steps of: after the molten iron is fed and subjected to temperature measurement and sampling, scrabbling primary slag before a slag scrabbling station; subsequently desulfurating the molten iron in a magnesium-based composite jetting mode at a jetting and desulfuration station, adding a lean slag modifier in the jetting process and modifying the lean slag of the solid or semi-molten desulfurated slag; subsequently transferring to the slag scrabbling station to carry out primary standing on the molten iron and accomplish middle slag scrabbling; separately jetting lime or calcium carbide at the jetting and desulfuration station so as to carry out deep desulfuration on the molten iron and coagulate and modify residual liquid slag; after the separate jetting, transferring the molten iron tank to the slag scrabbling station to carry out secondary standing on the molten iron and accomplish later slag scrabbling; and after the later slag scrabbling, measuring the temperature, sampling and discharging the molten iron so as to meet the requirements on a molten iron material of a low-sulfur steel. The deep desulfuration method adopts a mode that desulfurated slag of different properties is respectively modified and scrabbled, and has the advantages of simplicity in operation, convenience in application and sufficiency in desulfurated slag modification.

The invention relates to a package of an embedded chip and a manufacturing method thereof. The package comprises: a dielectric layer, which has a first surface and a second surface that is opposite to the first surface; conductive projections, which are arranged in the dielectric layer and are exposed outside the dielectric layer; a chip, which is embedded in the dielectric layer; a line layer, which is arranged on the first surface of the dielectric layer; conductive blind holes, which are arranged in the dielectric layer and are electrically connected with the line layer, the chip and the conductive projection; and a first welding-resistant layer, which is arranged on the first surface of the dielectric layer and the line layer. Therefore, other electronic apparatuses can be externally connected by the conductive projections, so that a stacked structure is formed; and the technology is effectively simplified. In addition, the invention also provides a manufacturing method of a chip scale package.

The invention discloses a high-frequency vibration based material stripping and collecting device. The material stripping and collecting device comprises a base, an operating platform located above the base, a fixing plate fixed to the operating platform, a material collecting device located under the operating platform and used for collecting striped components and parts and a high-frequency vibration device located above the fixing plate, wherein a support is fixed to the fixing plate and used for fixing components and parts to be striped. The high-frequency vibration based material stripping and collecting device can reduced strength and working strength of an operator, remarkably improves working efficiency and is simple in structure, high in automation degree and operating accuracy and capable of effectively avoiding damage of the components and parts and residual adhesive and meanwhile avoiding edge water material collection.

The invention discloses a method for measuring yellow brown esterification liquid, which comprises: weighing about 0.4 g of a sample into a 400 mL beaker, adding 10 mL glacial acetic acid and 100 mL sodium acetate solution, and then adding 50 mL water to keep the solution temperature at 5 " Below C, add 50 mL of p-nitroaniline diazonium salt droplet, stir at (0-5) °C for 30 min, and perform coupling titration with 2,4-diaminotoluene standard titration solution. When the intersection of the coupling test solution on the medium-speed qualitative filter paper and the diluted p-nitroaniline diazonium salt solution (1:5), the intersection is yellow, and the intersection with the H acid solution is colorless, that is as the end point; record the volume V1 of the 2,4-diaminotoluene standard titration solution consumed. At the same time, do a blank test; after the test, put the beaker into the ultrasonic cleaner for cleaning.

The invention provides a steel separating agent for a rotary platform and a furnace cover of a ladle refining furnace and a method for preventing the steel bonding of the rotary platform and the furnace cover of the ladle refining furnace, wherein the steel separating agent comprises the following components in percent by weight: 8-15 percent of high-alumina aggregate powder, 5-8 percent of quartz sand powder, 4-6 percent of silica micropowder, 25-35 percent of phosphorus-sheet graphite powder, 5-10 percent of zircon sand powder, 4-8 percent of organic bentonite, 10-18 percent of aluminium dihydrogen phosphate liquid and 15-25 percent of water. After the steel separating agent provided by the scheme is adopted, the difficult problem of steel bonding at all parts of the ladle refining furnace is effectively solved, the normal refining production time is greatly saved, the steel refining environment is effectively improved, the original fussy working for repeatedly bedding asbestos plates is eliminated, the production cost and the production time are greatly saved, and the economic value is higher.

The invention provides a short-flow recycling process of drum-method circulating water sludge, and discloses a sludge body taking sludge as a main material of a gunning slag ladle. The sludge body of the gunning slag ladle comprises the following components in parts by weight: 48-70 parts of sludge, 1.1-5.6 parts of additive, and 30-50 parts of water, wherein the sludge is precipitated sludge generated in three-stage precipitation in a drum-method circulating water treatment process; in total mass of the sludge, the remained amount is less than or equal to 5 percent by weight after sludge is screened through a sieve screen of 40 mu m; the additive comprises 0.1-0.7 part of accelerator by weight and 1.0-3.5 parts of early strength agent. The slurry can be used for gunning slag ladles, so that the drum slag treatment process is improved, and the sludge can be recycled.

The invention belongs to the field of metallurgy, and relates to a slag ladle protective agent using steel slag as a main raw material, and a preparation method and a spray repair method thereof. The slag ladle protective agent which comprises the following main raw materials in parts by weight: 10-30 parts of steel slag powder and 70-90 parts of water. The slag ladle protective agent also comprises a coagulant, a plasticizer and a curing agent, wherein the coagulant accounts for 0.5-2.0 wt% of the steel slag powder, the plasticizer accounts for 0.3-5.0 wt% of the steel slag powder, and the curing agent accounts for 0.3-3.0 wt% of the steel slag powder. The spray repair protective agent is uniformly sprayed to the inner wall of the hot-state slag ladle to form a slag ladle protective filmlayer, thereby effectively preventing the slag ladle from adhesion, optimizing the quality of the steel slag, enhancing the stability of the steel slag, prolonging the service life of the ladle, lowering the production cost, being beneficial to equalizing and organizing production and promoting the benign circulation of production.

The invention relates to a dual mode dephosphorization method carrying out in hot-metal ladle and belongs to the technical field of hot metal pretreatment. According to the technical scheme, the method comprises the following steps of: setting two dephosphorization modes in the process of dephosphorization and switching between the two modes, particularly alternately using the dust-spraying mode and the gas-spraying mode for carrying out dephosphorization in the hot-metal ladle. According to the dust-spraying mode, a spray gun is used to spray passivating lime, surface oxygen and scale 1.5-2 meters deep into the hot-metal liquid level with the nitrogen as a carrier; according to the gas-spraying mode, the same spray gun is used to spray nitrogen, lime having a granularity of 5-30mm and transported by a belt, surface oxygen and surface oxygen and scale 1.5-2 meters deep into the hot-metal liquid level, the nitrogen is sprayed separately and just used for stirring. The method realizes flexible switching of the spray gun between the two spraying modes under the hot metal surface level according to pipeline diameter and dynamic conditions, thereby avoiding the hot metal from flowing backward and blocking the spray gun, stabilizing the injection, and shortening the process period and reducing the production cost.