36 results about "Magnesium calcium" patented technology

The invention provides a potassic salt ore old brine-tail salt full-recycling cemented filling process based on magnesium-calcium synergistic conversion, and belongs to the field of potassic salt ore goaf filling, CaO is added into old brine for reaction to obtain Mg (OH) 2 / Ca (OH) 2 mixed precipitate, then a dispersing agent is added, and solid-liquid separation is performed to obtain a solid mixture and a post-reaction mother solution; dividing the tail salt into particle sizes gt according to particle sizes; the method comprises the following steps: mechanically grinding coarse tail salt with the particle size of 75 microns and fine tail salt with the particle size of less than or equal to 75 microns until the particle size lt is reached; filtering to obtain activated crude tail salt; mixing the fine tail salt with an exciting agent, and activating through ball milling to obtain activated fine tail salt; and mixing the activated crude tail salt, the activated fine tail salt, the solid mixture and the reacted mother liquor, adding a retarder and a water reducing agent, stirring to obtain filling slurry, and pumping the filling slurry into a well for filling in multiple layers. According to the method, Mg < 2 + > in old brine is directionally converted through calcium oxide to generate a Mg (OH) 2 / Ca (OH) 2 gelling phase, and a low-cost and high-strength filling system is formed by combining a tail salt grading activation technology.

The invention relates to the technical field of refractory materials, in particular to a magnesium-calcium-zirconium-carbon brick production method which comprises the following components in parts by weight: 60-80 parts of sintered magnesium-calcium-zirconium sand particles, 10-30 parts of fused magnesia particles, 2-4 parts of zirconium oxide, 0.5-3 parts of silicon carbide fine powder, 2-6 parts of nano yttrium oxide high-dispersion particles, 1-2 parts of C9 petroleum resin powder, 2-7 parts of graphite, 4-6 parts of binding agent and 0.3-0.5 part of urotropin. The rare earth material nano yttrium oxide high-dispersion particles are introduced, the magnesium-calcium-zirconium-carbon brick has the advantages of high temperature resistance, good hydration resistance, good thermal shock resistance, good oxidation resistance and good erosion resistance, the magnesium-calcium-zirconium-carbon brick is dried by an electric drying kiln as an unburned brick, a tunnel kiln firing process is omitted, the labor cost and energy consumption are reduced, and the production cost is reduced. And the emission of greenhouse gas and toxic and harmful gas generated by fuel combustion is avoided, and the biomass fuel is an environment-friendly product.

The invention discloses a production method of high-content magnesium and calcium soft sweets.The production method comprises the following steps that S1, minerals such as magnesium and calcium are selected, and the initial content of the minerals is determined; s2, selecting a natural sweetening agent, establishing an interaction model of the sweetening agent and mineral substances, constructing a preliminary calculation formula of the influence of the sweetening agent on the solubility of the mineral substances, and adjusting the type and proportion of the sweetening agent; s3, consumer data are collected, a personalized mineral formula optimization algorithm formula is established, and the proportion of minerals is optimized; and S4, based on an optimization result, adjusting production process conditions, and ensuring the quality of the soft sweets and the stability of mineral substances. According to the present invention, the personalized mineral substance ratio can be provided according to the requirements of different consumers so as to meet the requirements of the market on functional, personalized and healthy food.

The present application relates to a kind of self-setting composite bone implants based on gallic acid complex salt and preparation method thereof, belong to bone repair material field.The present application is specifically related to a kind of self-setting composite bone implants, it is characterized in that, component A, component B and component C, the component A is gallic acid and the complex salt of at least two metal elements, wherein the at least two metal elements are the metal element of promoting bone tissue regeneration or the trace metal element required by human body, and the at least two metal elements include calcium, the component B is the complex of calcium / strontium chondroitin sulfate and calcium sulfate, and the component C is magnesium calcium hydrogen phosphate complex.The self-setting composite bone implant of the present application has the characteristics of antibacterial, anti-inflammatory, promoting osteogenesis, instant shaping and all degradation, can meet the clinical needs of bone tumor, bone injury and the like, has wide application prospect in various bone repair, reconstruction and replacement.

The present application relates to a kind of magnesium carbon composite material and its preparation method.The technical scheme is: with 60-75wt% magnesium calcium particles, 13-25wt% electric smelting magnesite fine powder and 12-20wt% aluminum calcium carbon particles as raw material, plus 3-6wt% of the raw material aluminates, stirring, compression molding;Then dry 8-24 hours under the condition of 110-200 ℃, cooling, to prepare magnesium carbon composite material.The present application is based on lower grade magnesite fine powder and lower grade graphite fine powder as main raw material to prepare magnesium carbon composite material for high temperature smelting, with the characteristics of simple process and low cost, the prepared magnesium carbon composite material has good thermal shock stability and strong corrosion resistance, and can be used as the lining material of high temperature smelting vessel.

The present invention discloses a mechanized device for smelting magnesium and calcium and a method for using the same, and belongs to the technical field of non-ferrous metal smelting. The mechanized device for smelting magnesium and calcium includes a reduction tank, a pre-calcining barrel and an inner sleeve. A longitudinal reinforcing plate is arranged inside the inner sleeve, an opening is provided at the top of the inner sleeve, a plurality of partitions are arranged at both ends and in the middle of the inner sleeve, a plurality of through holes are provided on each partition, and a hook is provided at the end of the inner sleeve. The method of use is to transfer the pressed pellet material into the inner sleeve, and the inner sleeve is quickly loaded into the reduction tank through a mechanical device; vacuuming and heating reduction; after the reaction is sufficient, the vacuum of the reduction tank is destroyed, and the reduced magnesium and calcium are pulled out, and the inner sleeve and the reduced slag are pulled out together through the hook and transferred into the pre-calcining barrel, and the dolomite and limestone in the pre-calcining barrel are pre-calcined by using the sensible heat of the reduced slag. The device structure and the method of use of the present invention can realize rapid and convenient slagging, high magnesium and calcium reduction rate, low heat energy loss of the reduced slag, simple operation and high utilization rate.

The invention discloses a light magnesium-calcium-boron compound and a preparation method thereof. The method comprises the following steps: calcining calcium hydroxide at 400-800 DEG C to obtain calcium oxide; the preparation method comprises the following steps: sequentially adding Ca (OH) 2, diboron trioxide and magnesium oxide into pure water, stirring to form slurry, adding calcium oxide in batches, and promoting reaction by utilizing hydration heat release of calcium oxide; and stirring and dispersing the slurry at a high speed, drying and crushing to obtain a target compound. The obtained product is ternary composite powder and comprises, by oxide, 20%-40% of B2O3, 30%-50% of CaO and 10%-40% of MgO, the particle size D50 is not larger than 50 micrometers, and the apparent specific volume is not smaller than 3.0 cm / g. The method is mild in process and simple and convenient to operate, and the prepared compound is fine in particle, uniform in distribution, good in dispersity, stable in storage and transportation, suitable for the fields of fertilizers, rubber and plastic, flame-retardant additives and the like and good in industrial application prospect.

The invention relates to an environment-friendly magnesium-calcium ramming material and a preparation method thereof. The environment-friendly magnesium-calcium ramming material comprises the following components in parts by weight: 60-80 parts of waste magnesium-calcium brick particles; 20-30 parts of waste magnesite brick particles; 30 to 50 parts of magnesium calcium sand; 60-80 parts of a binding agent; 15-20 parts of tung oil; 10 to 15 parts of alumina; 10 to 15 parts of bentonite; and 8-12 parts of silica powder. The preparation method comprises the following steps: 1) weighing and proportioning according to the proportion, adding the waste magnesia-calcium brick particles, the waste magnesia brick particles and the magnesia-calcium sand into a stirrer, and uniformly stirring; 2) adding alumina, silica powder and a binding agent into the stirrer, and continuously stirring uniformly; (3) adding bentonite into the mixture obtained in the step (2), and uniformly stirring; and 4) finally adding the tung oil into the stirrer, and continuously stirring uniformly. The ramming material is prepared from waste refractory materials, so that the problem of environmental pollution caused by accumulation of the waste refractory materials is solved; the bentonite and the tung oil are adopted to prepare the ramming material, the tung oil is adsorbed on the bentonite, a composite waterproof agent is formed, and the hydration phenomenon of the ramming material can be improved.

The invention discloses a design method for preparing electric furnace bottom refractory for rock wool from long-life hot molten slag, a furnace bottom and an electric furnace. The design method comprises the following steps that S1, a multi-layer refractory heat preservation structure is adopted for laying the furnace bottom of the electric furnace, and a working layer laid by magnesium-calcium ramming materials is adopted for the top of the multi-layer refractory heat preservation structure; the top of the working layer is designed into an arc-shaped structure with a concave middle part; and S2, before the electric furnace is started, iron metal is put into the furnace to form a molten iron layer on a furnace bottom working layer, and then in the preparation process of rock wool melt, molten iron is discharged regularly through an iron outlet in the lower portion of the furnace wall. The arc-shaped structure formed by laying the magnesium-calcium ramming material is used as the electric furnace bottom, the molten iron layer is used for isolating the rock wool melt from the furnace bottom refractory material, the rock wool melt is prevented from making contact with the furnace bottom refractory material, the service life of the electric furnace bottom refractory material is greatly prolonged, the production halt time of a production line due to maintenance of the electric furnace refractory material is shortened, and therefore the operation rate of the rock wool production line made of the hot molten slag is increased.

The application belongs to the technical field of magnesium calcium brick processing, and particularly relates to an environment-friendly magnesium calcium brick processing device. The following scheme is provided: a kettle is arranged with a kettle cover, a stirring shaft is arranged in the middle of the kettle and is in transmission connection with a driving motor, the stirring shaft is vertically arranged at the center of the kettle, stirring blades are fixed to the outer wall of the stirring shaft, a slip ring is horizontally arranged at the top of the kettle, a plurality of slide rods are slidably connected to the outer wall of the slip ring, a scraper is fixed to the bottom end of the slide rod and is in abutment with the inner wall of the kettle, springs are arranged between the slide rods and the slip ring, and the rotation direction of the stirring shaft is set as the direction from the spring to the slide rod. Through the dynamic relative movement between the scraper and the stirring shaft, the use of liquid flow change and the collision between the slide rods and the inner walls of the two sides of the chute one in the reciprocating movement of the slide rods, the cleaning and anti-bonding effect of the surfaces of the slide rods and the scraper is improved, thereby effectively improving the mixing operation effect of the magnesium calcium brick preparation and the quality of the finished product.

The invention relates to the technical field of hydrometallurgy, in particular to a method for preparing a high-purity nickel plate by a sulfuric acid system, which comprises the following steps of: (1) forming an organic phase by using P507 as an extracting agent and 260 # sulfonated kerosene as a diluent, adding an alkali solution into the organic phase to carry out saponification reaction, and controlling the saponification rate to be between 60% and 70%; (2) weighing nickel sulfate, adding pure water to prepare a nickel sulfate stock solution, and controlling the pH value of the nickel sulfate stock solution to be 3.5-4.5; (3) the nickel sulfate stock solution is subjected to multi-stage counter-current extraction, the volume ratio of an organic phase to the nickel sulfate stock solution is 1: (1-1.5), the extraction temperature is 50-60 DEG C, and a high-purity nickel sulfate solution is obtained; and (4) the high-purity nickel plate is prepared with 3N6 electrolytic nickel as an anode and the high-purity nickel sulfate solution prepared in the step (3) as an electrolyte, the electrolysis temperature is 60-70 DEG C, and the voltage is 3.5-4.0 V. The purity of the finally prepared high-purity nickel plate can reach 6N5 or above, and the content of impurities such as cobalt, copper, iron, lead, magnesium and calcium in the high-purity nickel plate is within 100 ppb.

The invention belongs to a system and a process for co-producing potassium nitrate and calcium magnesium nitrate fertilizers by using a nitrophosphate fertilizer device. Comprising a powdered rock phosphate magnesium-calcium pre-removal unit, the powdered rock phosphate magnesium-calcium pre-removal unit is connected with a primary acidolysis decalcification unit, the primary acidolysis decalcification unit is connected with a nitrophosphate fertilizer production unit through a secondary decalcification and potassium nitrate separation unit, and the secondary decalcification and potassium nitrate separation unit is further connected with a potassium nitrate preparation unit; a liquid phase channel in the ground phosphate rock magnesium-calcium pre-removal unit and a solid phase channel in the primary acidolysis calcium removal unit are connected with the calcium magnesium nitrate fertilizer preparation unit; the ground phosphate rock magnesium-calcium pre-removal unit at least comprises a magnesium removal tank, the top of the magnesium removal tank is connected with a ground phosphate rock channel and a first nitric acid pipeline, an outlet of the magnesium removal tank is connected with a filter press, a liquid phase outlet of the filter press is connected with the primary acidolysis calcium removal unit, and a solid phase pipeline of the filter press is connected with the calcium magnesium nitrate fertilizer preparation unit; the method has the characteristics of improving phosphorite utilization rate and product added value.

The invention relates to a formula and a preparation method of a building block capable of circularly adsorbing nitrogen and phosphorus, and belongs to the technical field of environmental functional materials. The building block is prepared from the following raw materials in percentage by weight: 70-80% of dolomite attapulgite, 10-25% of sawdust, 3-5% of powdery magnesium calcium carbonate, 3-5% of powdery magnesium chloride hexahydrate, 1-2% of rhenium heptoxide, 1-2% of titanium dioxide and 2-5% of a polyimide adhesive, and is soaked in a sufficient 0.05 mg / mL magnesium oxide standard solution; the preparation method comprises the following steps: mixing raw materials, dipping in a magnesium oxide solution, drying, mixing with other raw materials, carrying out plastic forming, and pyrolyzing at 700 DEG C for 20-30 minutes under the protection of nitrogen. The building block has a porous structure, is large in specific surface area and rich in surface functional groups, can efficiently adsorb ions such as NH4 < + >, NO3 <-> and PO4 < 3-> in urban non-point source polluted water, can be analyzed and released under the action of plant root exudates, provides nutrients for plants, realizes cyclic utilization of nitrogen and phosphorus resources, can be used for scenes such as urban green belts and river channel protection slopes, and has a wide application prospect. The runoff pollution is effectively reduced.

The present application relates to a kind of large size zirconia ceramic and its preparation method, the zirconia ceramic includes by percentage by weight, including 91-95% of monoclinic zirconia, 0-1% of lanthanum trioxide, 3-8% of magnesium calcium sand, preparation process uses wet ball milling process, powder after ball milling dry is pressed into shape under 120-180MPa, after being fired at 1600-1700 ℃, large size zirconia ceramic is obtained.The present application utilizes MgO and CaO in natural magnesium calcium sand to stabilize zirconia, the micro-impurities in magnesium calcium sand are in liquid phase at high temperature, can promote sintering, reduce firing temperature;And a small amount of liquid phase relieves thermal stress at high temperature, prevent large size zirconia ceramic cracking, improve yield.In addition, magnesium calcium sand hydration generates a small amount of Mg (OH) 2 And Ca (OH) 2 Play the role of binding, need not to add binder separately.The zirconia ceramic prepared by the method has the advantages of low energy consumption, low cost and volume stability.

The invention relates to the technical field of refractory materials for steel smelting in the metallurgical industry, in particular to a novel magnesium-calcium-carbon refractory material and a preparation process thereof. Comprising the following components in percentage by mass: 50-80% of magnesia-calcium sand, 5-12% of flake graphite, 1-10% of a magnesium-calcium nano ultrafine powder binding agent, 1-10% of an anhydrous plastic additive, 1-5% of an antioxidant and 0.5-2% of an ultrahigh-temperature strength additive. By improving a combination system, a conventional anhydrous system liquid binding agent is improved into self-binding and high-temperature self-sintering combination of a nano material to generate binding strength, so that the quality performance and the stability of the production quality are improved, and the reduction of the use performance caused by volatilization of organic matters is reduced; and meanwhile, the complexity of the production process is reduced, and safety and stability of smelting use and improvement of steel quality are guaranteed.

The application discloses a high-viscosity anti-permeation special caulking paste for bolt holes and a preparation method thereof, and belongs to the technical field of building materials. The caulking paste is prepared by mixing and stirring Portland cement, heavy calcium carbonate, layered-branching composite calcium hydroxysilicate-magnesium calcium aluminate, porous cage-shaped hydrophobically modified calcium zinc aluminosilicate, latex powder, hydroxypropyl methyl cellulose ether, polypropylene fiber, calcium formate, organic silicon water-repellent agent, starch ether and water. The layered-branching composite calcium hydroxysilicate-magnesium calcium aluminate is prepared by parallel flow co-precipitation of a calcium source, an aluminum source, a magnesium source and a silicon source in the presence of a template agent and a buffer solution, and then hydrothermal calcination, so as to form a layer plate-whisker interlocking structure. The porous cage-shaped hydrophobically modified calcium zinc aluminosilicate is prepared by a sol-gel method through step-by-step temperature control complexation, template assembly, calcination and fluorosilane hydrophobic modification, so as to form a porous cage-shaped structure. The application is suitable for plugging of concrete structure bolt holes.

This invention discloses a trivalent chromium-doped magnesium calcium aluminate deep red phosphor and its preparation method. The phosphor is trivalent chromium ion-doped magnesium calcium aluminate with the chemical formula CaMg2Al. 16‑x O 27 :xCr 3+ The elemental molar ratio is Ca:Mg:Al:O:Cr = 1:2:(16-x):27:x, where 0.01≤x≤0.10. This invention also discloses a method for preparing this phosphor. The deep red luminescent phosphor of this invention exhibits absorption in the 300-650 nm region and its emission spectrum is located in the 600-880 nm region. Its emission color is in the deep red to near-infrared range, which matches the deep red absorption spectrum of plant photosynthesis. This phosphor has potential application prospects in plant LED lighting.

The application belongs to the technical field of magnesia-calcium brick production, and particularly relates to a crusher with a multi-layer screening structure suitable for magnesia-calcium bricks. The existing crushers for magnesia-calcium brick production generally do not have a multi-layer screening structure. After crushing the raw ore, the un-screened raw ore particles and powders need to be manually collected for secondary screening. The present application proposes the following scheme. The scheme comprises a processing box, a support plate fixedly installed in the processing box, a plurality of discharge holes with equal intervals formed on the support plate, a baffle fixedly installed in the discharge hole, a grinding assembly connected to the processing box, a transmission assembly connected to the grinding assembly, and a driving motor fixedly installed at the rear side of the processing box. The driving motor can be started after the magnesia-calcium bricks to be crushed are placed on the support plate, so that the magnesia-calcium bricks can be crushed and multi-stage screened. When the magnesia-calcium bricks are crushed, the screening can be automatically realized, so that manual screening is not needed, and the application has good practicability.

The present invention provides a composition, in particular, a pharmaceutical composition and a food and drink composition, for preventing or treating endometriosis, the composition containing polyphosphoric acid or a salt thereof. The salt of the polyphosphoric acid may be a metal salt of polyphosphoric acid, may contain, as a constituent metal thereof, at least one among sodium, potassium, magnesium, calcium, and zinc, and is preferably calcium polyphosphate or zinc polyphosphate. According to the present invention, the prevention or treatment of endometriosis based on a novel action mechanism, which is highly safe to a living body, is possible.

The application belongs to the technical field of magnesium calcium brick production, and particularly relates to an automatic cutting equipment for finished magnesium calcium spinel refractory bricks. The existing cutting mode is basically semi-automatic operation, and the cutting knife needs to be manually controlled to rise and fall, which is inconvenient. The present application provides the following scheme. The equipment comprises a support, a conveying motor is fixedly installed on the left side of the support, a driving roller is rotatably connected in the support, the rear end of the driving roller extends to the rear side of the support, the output shaft of the conveying motor and the driving roller are connected with the same transmission belt, a plurality of supporting rollers are rotatably connected in the support at equal intervals, and the plurality of supporting rollers and the driving roller are connected with the same conveying belt. In the application, the magnesium calcium brick blank can be conveyed, cut into strips and cut into blocks when the conveying motor and the driving motor are started, so that automatic cutting can be realized when the magnesium calcium brick is cut, and the cutting efficiency can be effectively improved, and the application has good practicability.

The utility model discloses a magnesium calcium brick with good connectivity relates to magnesium calcium brick technical field, including straight brick mechanism, the lateral surface of straight brick mechanism is matched with the setting of outer insertion mechanism or inner insertion mechanism, the steering connection of outer insertion mechanism and inner insertion mechanism is provided with right angle brick mechanism, the utility model solves the rectangular setting of current brick body usually, and the reinforcement is carried out with slurry at the connecting place, leads to the problem of the poor corrosion -resistant effect of gap, the utility model through the setting of straight brick mechanism and right angle brick mechanism, make the brick body overlap, and the protruding setting of straight insertion piece makes the contact between multilayer brick body more close, through the corresponding setting of outer insertion mechanism and inner insertion mechanism, realize staggered connection, and the square brick is set in right angle end, and this structure is interlaced up and down and left and right each other, and the connecting effect is better, and straight brick mechanism, outer insertion mechanism, inner insertion mechanism and right angle brick mechanism can batch production, and the random splicing is more suitable for the need of magnesium calcium brick as the lining of steel -making furnace.

The application discloses a magnesium-calcium anti-joint agent, a preparation method thereof and waterproof cement mortar. The anti-joint agent comprises a mixture of magnesium oxide and calcium oxide to which graphene oxide is attached. The preparation method comprises the following steps: (1) mixing magnesium oxide and calcium oxide to obtain a magnesium-calcium powder, and then fluidizing the powder; (2) applying a dispersion liquid formed by atomized graphene oxide and a volatile non-aqueous dispersion medium to the fluidized powder. After completion, the obtained mixture is mechanically ground to obtain the magnesium-calcium anti-joint agent. The waterproof cement mortar comprises the following raw materials: 100 parts by weight of cementing material, 2-10 parts by weight of the magnesium-calcium anti-joint agent, 120-350 parts by weight of fine aggregate and 30-60 parts by weight of mixing water. The anti-joint agent effectively realizes real-time compensation of internal volume change of the cement mortar, prevents development of microcracks and realizes efficient waterproofing of the cement mortar.

The application discloses a preparation method of gradient pore containing magnesium calcium phosphate bone repair material, which comprises the following steps: S1, mixing nano-hydroxyapatite and polylactic acid-glycolic acid copolymer PLGA powder, adding dichloromethane as a solvent, continuously stirring to form a solution, and obtaining nHA / PLGA raw materials through freeze drying, and then preparing a degradable nPLGA support through a 3D biological printer high-temperature melting deposition; S2, taking calcium phosphate bone cement powder and magnesium metal microspheres according to a preset mass ratio, stirring the slurry to be homogeneous, and obtaining calcium phosphate bone cement slurry containing magnesium metal microspheres; S3, injecting the calcium phosphate bone cement slurry obtained in the step S2 into the nPLGA support prepared in the step S1 to obtain an MC / nPLGA compound; through the hydration reaction of the magnesium microspheres, gradient micropores are generated, and the macropores formed by the degradation of the PLGA form a complementary structure, and the total porosity reaches 68%, which is 3.4 times higher than that of traditional CPC.

The utility model discloses a cutting device for magnesia-calcium brick production, which comprises a main frame, a working table, a connecting frame, a first motor, a driver, a side fixing structure, an operating table and a cutting frame, the working table is arranged in the middle of the main frame, the connecting frame is arranged between the upper parts of one side of the main frame, the first motor is arranged above the connecting frame, and the driver is arranged above the first motor. A driver is arranged on the front side of the first motor, a side fixing structure is arranged above the front side of the workbench, an operation table is arranged between the bottom of the side fixing structure and the workbench, a cutting frame is arranged above the middle of the operation table, and the cutting frame is located between the middles of the side fixing structure. The cutting device for magnesia-calcium brick production has the remarkable beneficial effects in the aspects of efficient cutting, accurate positioning and adjusting, stable fixing, high adaptability, safety protection, compact structure and the like, and powerful support is provided for magnesia-calcium brick production.

Provided herein are methods of making compositions comprising mixtures of lactones. Also provided herein are mixtures of lactones produced by the methods provided herein. An example lactone composition can include a 5-hydroxy-2-decenoic acid-δ-lactone, a 3,5-dihydroxydecanoic acid-δ-lactone, and sulfur, nitrogen, phosphorus, potassium, magnesium, calcium, sodium, iron, aluminum, silicon, organic chloride, 3,5-dihydroxydecanoic acid, a carbohydrate, free fatty acids, or a combination thereof.

The invention relates to a biodegradable implant comprising a surface coated magnesium alloy or zinc alloy product, whereby the coating layer comprises oxides and / or phosphates of from rare-earth elements, Mg, Ca, Zn, Zr, Cu, Fe, Sr, Li, Mn or Ag wherein the coating is preferably generated by plasma electrolytically oxidation (PEO). The invention further comprises a method for preparing the coated magnesium or zinc alloy product of the implant.

The utility model discloses a sintering device for magnesia-calcium brick production, which comprises a sintering box, a sintering tray is arranged in the sintering box, a filtering mechanism is arranged on a pipeline, the filtering mechanism is composed of a connecting pipe, first filter cotton and second filter cotton, the first filter cotton and the second filter cotton are arranged in the connecting pipe, and the first filter cotton and the second filter cotton are arranged in the connecting pipe. A plate heat exchanger is arranged on one side of the outer portion of the sintering box, and the air inlet end of the plate heat exchanger and the air outlet end of the fan are connected with an air inlet pipe. Heat in the sintering box is absorbed by the fan, the absorbed heat is conveyed to the plate heat exchanger for further heat exchange and treatment, and recycled waste heat can be converted into hot water, so that direct emission and waste of the heat are avoided, flue gas waste heat generated in the sintering process can be efficiently recycled and utilized, and the utilization rate of the flue gas waste heat is improved. And the energy is converted into available energy, so that the energy consumption of the sintering process can be obviously reduced, the carbon emission is reduced, and the energy consumption and the environmental pollution are favorably reduced.

A system for producing hydrogen gas by reacting a metal selected from a group consisting of silicon, aluminum, magnesium, calcium, lithium, potassium and sodium and water, comprises a reaction chamber, a water supply device, configured for supplying water to the reaction chamber, a metal supply device, configured for supplying metal to the reaction chamber, a hydrogen collection arrangement, configured for collecting hydrogen gas from the reaction chamber and supplying said hydrogen gas via a main output channel to an application hydrogen consumer, and a controller, configured to control at least one of the water supply device, the metal supply device and the hydrogen collection arrangement. A water harvesting device is configured for harvesting water from air, and comprises an adsorbent, a water release device, configured to causing water to be released from the adsorbent, and a water collection device, configured to collect water released from the adsorbent, wherein the water collection device is connected to supply water to the reaction chamber. The disclosure provides a system and methods for producing hydrogen gas by reacting metal and water. The disclosure further provides a vehicle comprising said system and a portable device comprising said system.

The present application belongs to the technical field of magnesium calcium brick production, especially to a kind of magnesium calcium brick environment-friendly processing mould and its ejection mechanism, aiming at the existing mould generally adopts artificial mould clamping, there can be the problem of deviation of upper mould plate and mould box, and after magnesium calcium brick blank is made, it is inconvenient to move magnesium calcium brick out of mould box, the following scheme is proposed, its processing mould includes base, the top of base is fixedly installed with column symmetrically, and the number of column is two, in the present application, electric push rod can drive upper mould plate to move downward, so that magnesium calcium brick blank can be pressed and formed, since electrical power control is adopted, upper mould plate and mould box can be accurately clamped, deviation does not occur, and when electric push rod drives upper mould plate to move upward after pressing is completed, magnesium calcium brick product can be automatically ejected from mould box, so that demoulding can be conveniently carried out.

A polymer composite alloy for orthopedic implants includes a magnesium alloy coated with a polymer composite. The polymer composite can be polydioxanone. Alternatively, the polymer composite can be polyglyconate. Implants manufactured from the alloy composite are also provided. In an exemplary embodiment, the implant includes at least one through passage from one side of the implant to a distal side of implant.