37 results about "Aluminium agents" patented technology

The invention discloses a method for preparing titanium dioxide from new process titanium slag, and belongs to the technical field of titanium dioxide production. The method comprises the following steps of: performing acidolysis reaction on the new process titanium slag and concentrated sulfuric acid under certain conditions; leaching, precipitating and filtering the mixture to obtain clear titanium liquid; adding an aluminum removing agent into the clear titanium liquid to recover aluminum by freezing crystallization; adding oxidized trivalent titanium serving as an oxidant into the clear titanium liquid and concentrating the mixture; hydrolyzing, filtering and washing the concentrate by using a process for adding crystal seeds; and bleaching, salting, calcining and post-processing the filter cake to prepare the rutile titanium dioxide which meets the application requirement. The method has the most noticeable characteristic that the rutile titanium dioxide which meets the application requirement is prepared from the new process titanium slag which has the disadvantages of various impurities and difficult acidolysis; and thus a new raw material for producing the titanium dioxide by a sulfuric acid method is developed, various valuable elements are recovered as much as possible, the utilization ratio of the resource is improved and the production cost is reduced.

The invention provides methods and compositions for detection and removal of sulfate from a liquid. The method provides much faster removal of sulfate than the prior art does and does so while requiring the use of far less aluminum. The method involves sequentially adding an acidic to neutral pH generating aluminum agent to the liquid, an alkaline pH generating aluminum agent to the liquid, after having added the acidic to neutral pH generating aluminum agent, and an alkaline calcium agent to the liquid. The most efficient rate possible can be obtained by also using a fluorophore to precisely determine the amount of sulfate in the liquid.

The invention discloses a stainless steel low-temperature powder embedding iron-aluminum co-cementation agent and a pack-cementation process method. The stainless steel low-temperature powder embedding iron-aluminum co-cementation agent is characterized in that aluminum powder is taken as main an aluminum supplying agent, iron powder is a main iron supplying agent, iron-aluminum powder is taken as active filler to replace the conventional inactive ceramic powder filler, aluminum trichloride is taken as an activating agent, and a small amount of rare earth chloride can be added to be used as a catalyst; and a process comprises the following steps of: completely and uniformly mixing the cementation agent, then putting the cementation agent and a stainless steel sample to be subjected to iron-aluminum copermeation processing into a cementation tank, mixing sodium silicate with fire clay, carrying out sealing and drying, so as to obtain an iron-aluminum compound alloy layer with the certain thickness, wherein the alumetizing temperature is 380-600 DEG C, and the temperature is kept for 10 or more than 10 hours. The stainless steel low-temperature powder embedding iron-aluminum co-cementation agent has the advantages that the process method is simple, devices required for low-temperature embedding iron-aluminum co-cementation are simple, the cost is low, the aluminum content of the surface of the obtained iron-aluminum compound alloy layer is high, the iron-aluminum compound alloy layer has a very strong binding force with a matrix and good intermediate temperate oxidation resistance and corrosion resistance and can well protect the matrix.

The invention discloses a method for treating household garbage leachate by using household garbage incineration fly ash. The method comprises the steps: adding a hydrochloric acid aqueous solution into the household garbage leachate; respectively weighing water and the household garbage incineration fly ash, mixing, stirring and centrifuging for solid-liquid separation to obtain household garbageincineration fly ash water washing liquid and fly ash solid slurry; carrying out electric treatment on the household garbage incineration fly ash water washing liquid, capturing gas generated by an electric anode chamber, directly introducing the gas into the acidified household garbage leachate, and aerating the household garbage leachate; scraping and filtering the household garbage leachate toobtain oily nitrogen trichloride and denitrified leachate; weighing an iron-aluminum agent and the fly ash solid slurry, and carrying out vacuum drying to obtain fly ash purified powder; and weighingthe denitrification leachate and the fly ash purification powder, mixing, stirring, and carrying out solid-liquid separation to obtain the household garbage leachate purification liquid and gelatinized fly ash solid slurry. 86% of nitrogen trichloride can be recycled at most, and 98% of ammonia nitrogen, 97% of COD, 98% of total phosphorus and 98% of mercury in the landfill leachate can be removed.

The invention relates to a method of leaching vanadium from roasted stone coal. According to the technical scheme, roasted stone coal is finely ground and is mixed well with water to obtain mixed pulp; concentrated sulfuric acid is added into the mixed pulp and leached under vapor and stirring conditions to obtain acid leaching slurry; the acid leaching slurry is subjected to three-stage leaching: stage I leaching refers to adding calcium fluoride into a first single-stage stirring leaching tank of a stage I leaching apparatus for leaching, stage II leaching refers to 1-2 hours of leaching prior to adding adjusted slag into a last single-stage stirring leaching tank of a stage II leaching apparatus for continued leaching, and stage III leaching refers to adding an aluminum remover into a first single-stage stirring leaching tank of a stage III leaching apparatus for leaching, and final acid leaching slurry is obtained; solid-liquid separation is carried out to obtain final acid leaching liquid and leaching residue; pH of the final acid leaching liquid is adjusted, and solid-liquid separation is carried out to obtain adjusted acid leaching liquid and adjusted residue. The method has low production cost, is easy to industrialize and has the advantages of high vanadium leaching rate and low content of impurity ions in leachate.

The invention discloses a low-temperature embedding aluminizing agent and a powder embedding aluminizing method, and belongs to the technical field of embedding aluminizing. The low-temperature embedding aluminizing agent is characterized by being prepared from, by mass, 20%-40% of Al powder, 0.5%-2% of CeO2, 2%-4% of an activating agent and the balance Al2O3. The method comprises the following specific preparation steps that (1) the aluminum powder, nano cerium dioxide and aluminum oxide are weighed according to a proportion, and the materials are added into a ball mill for mixing and stirring; (2) the activating agent is added into the ball mill, and stirring is conducted continuously; and (3) the uniformly mixed materials are placed into a crucible and dried in a muffle furnace in an air-isolated manner. A powder embedding aluminizing technology is characterized by comprising the following steps that (1) a small amount of low-temperature embedding aluminizing agent is put into a crucible, and then a workpiece is put into the crucible; (2) the aluminizing agent is continuously filled; (3) the crucible is put into the muffle furnace for heating and heat preservation; (4) the workpiece is taken out and air-cooled to the room temperature.

The invention discloses a method of welding between a stainless steel stud and a steel plate. A hole is drilled in an end of the steel stud, and is filled with an aluminum agent. Because optimal designing is carried out on the form of the steel stud, and a magnetic ring is adopted for protection on the stainless steel stud, it is effectively avoided that a stainless steel stud is oxidized in the welding process, and the welding quality is guaranteed. Because the stainless steel stud is used instead of a Q235 carbon steel stud, the corrosion resistance of a welding joint of the stainless steelstud is improved, the situation that the stud becomes rusty in the service process of a product is effectively avoided, and service safety of the product is guaranteed; and the welding technology of the stainless steel stud is optimized, the technological parameters such as the welding current, the arc discharge length and the lifting height at the horizontal gesture, the vertical gesture and theposition of facing upward are determined, hot cracks during welding are avoided, the bending performance and the torsion performance of the welding point of the stud are improved, the hardness of thewelding point is reduced, and the comprehensive performance of the welding point is improved.

The invention discloses a fluorine and silicon removal method for reverse osmosis concentrated water, which comprises two stages of softening and clarifying steps. In the first-stage softening and clarifying, the reverse osmosis concentrated water enters a first reaction tank and a first clarification tank in sequence. In the second-stage softening and clarifying, effluent of the first-stage softening and clarifying enters a second reaction tank, a flocculation tank and a second clarification tank in sequence. An aluminum agent is added into the first reaction tank to remove fluorine, and sodium metaaluminate is added into the second reaction tank to remove silicon. According to the method disclosed by the invention, fluorine ions and silicon ions in the concentrated water can be efficiently removed by adding a small amount of agents.

The invention discloses a zinc slag recycling and regenerating system for hot galvanizing. The zinc slag recycling and regenerating system for hot galvanizing comprises a zinc slag adding device, an aluminum agent adding device, a protection medium adding device, a temperature control smelting furnace device, a liquid-slag separating device, a molten zinc ingot casting device, a dissolving tank and an electrolytic cell. The zinc slag recycling and regenerating system is characterized in that the zinc slag adding device is connected with the temperature control smelting furnace device, the position above the temperature control smelting furnace device is connected with the aluminum agent adding device and the protection medium adding device, and the liquid-slag separating device is arranged at the bottom of the temperature control smelting furnace device and connected with the molten zinc ingot casting device and the dissolving tank; and the dissolving tank is connected with the electrolytic cell through a pipeline and connected with a washing drying device, and a discharging port of the washing drying device is connected with a feeding port of the temperature control smelting furnace device. According to the zinc slag recycling and regenerating system, raw material and energy consumption can be reduced to a large degree, investment is reduced, and meanwhile by-products in the recycling process can be cyclically utilized. The zinc slag recycling and regenerating system has the beneficial effects that the recycling cost is low, the technology is simple, waste water discharging is avoided, and new pollution is not generated.

The invention relates to a preparation method for a diffusion impervious layer suitable for a large member. The preparation method comprises the following steps: preparation of an aluminizing medium:packing an alumiumn and iron block in a container, adding ammonium hydrogen fluoride which accounts for 0.5-1.0% by mass of aluminum and iron block, then adding water till inundating the surface of the aluminum and iron block, then heating the aluminum and iron block in a heating furnace and keeping the temperature at 270-330 DEG C till the mixture is boiled away; performing roasting at 700-900 DEG C between activating treatment twice; deoiling: cleaning surface dirt and oil stains of parts and assemblies, including test samples, needed to be aluminized with an organic solvent thoroughly; liquid sand-blowing: performing liquid sand-blowing on the parts and assemblies before aluminizing, wherein the air pressure does not exceed 0.3 MPa; and gas phase aluminizing: keeping the temperature for1-3.5 hours at 900-1050 DEG C, wherein the relative pressure in the furnace is controlled at 0.002-0.01 Mpa. The method has the advantages that a formed aluminum oxide impervious layer is intact, continuous and compact and exists stably at a high temperature for a long time, can be used for preparing the diffusion impervious layer of the large member, and is low in cost of raw materials, simple in process and high in production efficiency.

The invention relates to the technical field of artillery maintenance equipment, in particular to an artillery rifled line maintenance device and an application method of the artillery rifled line maintenance device. The artillery rifled line maintenance device comprises a carrier combination framework. The artillery rifled line maintenance device is characterized in that the carrier combination framework is a cylindrical pipe, multiple carved grooves are uniformly carved in the outer surface of the carrier combination framework and correspond to the sizes of rifled lines of a bore. A cuttingportion assembly, a grinding portion assembly and a lapping portion assembly are arranged at one end of the carrier combination framework in sequence, and a central shaft rod is arranged in the centerof the carrier combination framework in a rotatable and penetrative mode. The artillery rifled line maintenance device and the application method of the artillery rifled line maintenance device havethe beneficial effects that the metal adhering to the rifled lines are removed by mechanical cutting tools, the removal mechanism is opposite to the acting force forming the metal adhering to the rifled lines, the friction extrusion mode is changed in the cleaning mode, the rising winding cutting type removal mode is adopted, the counterforce and the cutting tools are combined to cut away the metal adhering to the rifled lines, the cleaning efficiency is improved, the soaking operation of chemical agents such as copper removal agents and aluminum removal agents can be omitted, and the cleaningrequirements that the time and the labor are saved, and the consumable items are saved can be met.

The invention belongs to the technical field of environmental protection, and discloses a method for removing aluminum from a strong alkali solution and application, the method comprises the following steps: concentrating and filtering the strong alkali solution, taking a first concentrated solution, adding the first concentrated solution into an aluminum removal agent, reacting, cooling, and carrying out solid-liquid separation to obtain silicon slag and filtrate; concentrating and filtering the filtrate to obtain a metal hydroxide crystal and a second concentrated solution; the aluminum removal agent comprises the following components: silicate and silicon dioxide; the strong alkali solution contains aluminate ions. According to the method, silicate and silicon dioxide are used as aluminum removal agents in the strong alkali solution, aluminum is made to generate water-insoluble aluminosilicate under the condition that the original pH of the solution is not changed, aluminum in the strong alkali solution is removed to 30-100 ppm, corresponding sodium hydroxide, potassium hydroxide or lithium hydroxide crystals can be recycled, and mother liquor is recycled.

The invention relates to a reusable low-temperature aluminizing agent and an aluminizing method. The aluminizing agent comprises the following components in percentage by mass: 6-25% of an aluminum supply agent; 1-15% of a penetration enhancer; 1-6% of a brightener; and 54-92% of a dispersant. The aluminizing method comprises the following steps: a) contacting a to-be-treated metal part with the aluminizing agent for aluminizing treatment, and providing the aluminized metal part and the used aluminizing agent. The aluminizing agent has the advantages of simple components, easily available materials, reusability, reduction of the aluminizing cost, low aluminizing temperature, simple preparation process, improvement of the aluminizing efficiency, improvement of the high-temperature oxidation resistance and corrosion resistance of metal parts, improvement of the service temperature of the metal parts, and improvement of the service life of the metal parts.

The invention discloses a positive pressure atmosphere aluminizing reinforcing method for a nickel-based alloy, a nickel-based alloy workpiece and application. The aluminizing reinforcing method comprises the following steps: placing a nickel-based alloy matrix with the local surface covered with an aluminizing agent at least in protective atmosphere, aluminizing at the temperature of 900-1100 DEGC, and enabling the protective atmosphere to be at positive pressure in an aluminizing process, wherein a surface metallurgically bonded Ni-Al reinforcing layer with high hardness, high abrasion resistance and high corrosion resistance can be obtained by controlling technological conditions such as aluminizing temperature and aluminizing time. The method disclosed by the invention has the advantages that influence of oxygen and the like on an aluminizing layer is isolated, aluminizing rate and aluminizing layer quality are obviously improved, and corrosion resistance and oxidation resistanceof the aluminizing layer can be guaranteed; meanwhile, the limit of the method on shape and size of a workpiece is low, a nickel-based alloy surface reinforced layer with the characteristics of high hardness, high abrasion resistance and high corrosion resistance can be obtained, the surface protection of the nickel-based alloy is effectively realized, and the performance of the nickel-based alloymatrix is hardly damaged.

The invention relates to a process and equipment for removing aluminum by complexing chlorosilane. The low-temperature complexing aluminum removal process, the liquid-phase complexing aluminum removalprocess, the gas-phase complexing process and the high-pressure rectifying aluminum removal process are operated independently or in a combined mode to meet different chlorosilane purification requirements. A chlorosilane mixture filtered by the low-temperature complexing stirring tank filter and raw materials conveyed by the raw material buffer tank enter and exit the heat exchanger for heat exchange through low-temperature complexing aluminum removal, and effective utilization of energy is achieved. The low-temperature complexing aluminum removing agent, the liquid-phase aluminum removing agent and the gas-phase aluminum removing agent are long in service life and obvious in complexing aluminum removing effect. According to the process, various complexing aluminum removing agents can beselected for use, and high complexing aluminum removing performance can be kept under the condition of the technological operation range. The aluminum removal rate of chlorosilane is improved, the content of aluminum chloride in chlorosilane is reduced through the low-temperature complexing aluminum removal process and the liquid-phase complexing aluminum removal process, and finally the contentof aluminum in chlorosilane can be reduced to 0.001 ppm or below through the series gas-phase complexing aluminum removal process and the high-pressure rectification aluminum removal process.

The invention provides a method for preparing rare earth carbonate from ionic rare earth ore, and belongs to the technical field of rare earth metallurgy. According to the method, the extraction resin is used for adsorption-desorption, impurities Mg and Fe and most Si and Ca can be removed, the extraction resin can be recycled, Al can be efficiently removed through the procedures of liquid residual acid neutralization after desorption and Al removal through the aluminum removal agent, rare earth loss is small, and the aluminum removal agent can be recycled. And finally, precipitating to obtain a rare earth carbonate product with the rare earth content of more than 93wt% after burning. The method is good in production environment, high in impurity removal rate, low in chemical reagent consumption, high in rare earth precipitation product purity, low in impurity content and low in later rare earth smelting separation cost.

The invention provides a multistage crystallization precipitation treatment method for wastewater desalination. The method comprises the following steps: 1) adding a calcium agent, an auxiliary agentand an aluminum agent into salt-containing wastewater, carrying out precipitation reaction, and carrying out solid-liquid separation to obtain a supernatant; 2) adding a calcium agent, an auxiliary agent and an aluminum agent into the supernatant at least once to perform precipitation reaction, and performing solid-liquid separation to obtain a clarified liquid; and 3) adding a neutralizer into the clarified liquid, carrying out neutralization reaction, and carrying out solid-liquid separation to provide the desalted wastewater. The invention further provides a multistage crystallization and precipitation treatment system for wastewater desalination. According to the multistage crystallization and precipitation treatment method and system for wastewater desalination, salt in wastewater isremoved through the crystallization and precipitation effect of calcium-aluminum crystals, and the method has the advantages that energy consumption and treatment cost are reduced, the method is not affected by the content of organic matter in water, and the method can be used for pretreatment of wastewater biochemical treatment.