66results about How to "Strong exchange ability" patented technology

The invention relates to a coating material and a preparation method thereof, and in particular relates to an environment-friendly interior wall coating material with calcined shell powder as base stock and a preparation method of the environment-friendly interior wall coating material. The environment-friendly interior wall coating material comprises the following components in percentage by weight: 44-53 percent of calcined shell powder, 7.0-9.0 percent of starch gel, 7.0-9.0 percent of cellulose gel, 7.0-9.5 percent of styrene-acrylic emulsion, 1.0-2.0 percent of glycol, 1.0-2.0 percent of dispersing agent, 0.5-1.5 percent of coalescing agent, 0.5-1.5 percent of defoaming agent, 0.2-0.6 percent of multifunctional additive and the balance of water. The coating material produced by using the preparation method not only accords with basic standards of national coating materials, is resistant to alkali, scouring and low temperature and good in covering effect and construction effect, but also has the function of better adsorbing harmful gases, such as formaldehyde and is an environment-friendly purely natural nuisanceless interior wall coating material.

The invention relates to an anti-hardening soil improvement agent and a preparation method thereof. The anti-hardening soil improvement agent is prepared from the following components in parts by weight: 0 to 60 parts of cow dung, 0 to 60 parts of microbial fungus residue, 0 to 60 parts of gypsum powder, 0 to 10 parts of urea, 0 to 30 parts of bentonite, 5 to 30 parts of humic acid, 5 to 30 partsof biochemical potassium fulvate, 1 to 5 parts of water retention agent, 0 to 2 parts of pyroligneous liquor, 0 to 2 parts of phosphoric acid, 0.1 to 0.5 part of ferrous sulfate, 0.1 to 0.5 part of copper sulfate, 0.1 to 0.5 part of manganese sulfate, 0.1 to 0.5 part of zinc sulfate, 0.1 to 0.5 part of sodium borate, 0.1 to 0.5 part of ammonium molybdate and 0.02 to 0.1 part of rooting powder. Thespecific weight and the volumetric weight of soil can be effectively decreased; the porosity is improved; the organic content of the soil is increased; the quantity and the stability of water-stablemacro aggregates of the soil are improved; physical property of the soil is ameliorated; the effects of nutrient slow release, water retention and fertility preservation are achieved, and the anti-hardening soil improvement agent has obvious effects on both the nutrient activation of the soil and the yield increment of a crop.

The invention discloses a saline-alkali soil improvement fertilizer and a preparation method thereof. The saline-alkali soil improvement fertilizer consists of the following raw materials in parts by weight: 50-70 parts of a humic fertilizer, 5-15 parts of a compound fertilizer, 20-40 parts of a mineral fertilizer, 10-15 parts of an acid fertilizer and 2-5 parts of a water-retaining agent. The saline soil improvement fertilizer is rich in humic acid and trace element, nutrient components such as nitrogen, phosphorus and potassium are relatively balance, the soil fertility and the soil structure can be improved, the speed of capillary water movement and ineffective evaporation of moisture can be reduced, and a remarkable salt returning suppression effect can be achieved. Meanwhile, the saline-alkali soil improvement fertilizer is relatively good in exchange capability, harmful ions such as Na<+>, SO4<2-> and Cl<-> can be adsorbed, the pH value and the alkalisation degree of soil can be reduced, and the soil exchange capability can be improved.

The invention discloses an electroplating method for a PCB plate and an apparatus. The method comprises: a preparation step comprising immersing the PCB plate in a plating solution of a plating bath in a way that a plate surface is perpendicular to a liquid surface, wherein a first side of the PCB plate has a first side nozzle set and a second bottom nozzle set, and a second side of the PCB plate has a second side nozzle set and a first bottom nozzle set; and a jet flow processing step, wherein a first nozzle group composed of the first side nozzle set and the first bottom nozzle set and a second nozzle group composed of the second side nozzle set and the second bottom nozzle set cyclically and alternately jet for predetermined times. The electroplating method for the PCB plate and the apparatus provided by the invention utilize a technical means that two nozzle groups cyclically and alternately jet. A relatively large negative pressure is generated at two sides of the holes of the PCB plate due to different flow rates of the plating solution. A flow effect of the plating solution is relatively full, an exchange capability is relatively strong, and a deposition speed of copper ions is increased, thereby improving a throwing power so that a thickness of electro-coppering is enough and uniform.

The invention discloses a high-performance concrete admixture in use of waste ceramic powder and an implementing method thereof. The high-performance concrete admixture is prepared by the following steps: utilizing waste ceramics as a main material and utilizing active seed crystals and a modified enhancer as auxiliary materials; performing modified treatment and high-temperature smelting on various materials, then putting into a cement mill to mill the materials to be pre-finished products with specific area of 300-450 m2 / kg, and finally, doping mixed fibers. The high-performance concrete admixture comprises the raw materials in parts by weight: 80-100 parts of waste ceramic powder, 6-9 parts of active seed crystal, 2-6 parts of modified enhancer and 5-10 parts of mixed fibers. By adopting mixed ceramic powder, density of cement mortar is effectively increased; strength of concrete is improved and durability of concrete is remarkably improved. Energy problems are solved, and meanwhile, an environmental protection purpose is considered; the high-performance concrete admixture has remarkable technical, economic and social benefits.

The invention discloses pitaya pericarp dietary fiber powder, belonging to the field of functional food additives. The high activity dietary fiber powder is prepared by drying, crushing and sieving the pitaya pericarp. The pitaya pericarp dietary fiber powder is characterized in that: the dietary fiber powder comprises no less than 69 % of dietary fibers, proper amount of vegetable protein, and low content of vegetable oil and is rich in phenols; the content of soluble dietary fibers is very high, and the ratio of the soluble dietary fibers to the insoluble dietary fibers is good; the test results show that the dietary fiber powder has high antioxidative activity, outstanding water-keeping ability, oil-keeping ability, swelling property, dialysis retardation index of glucose and other physical and chemical activities; and the dietary fiber powder can be used as a functional food additive which enhances the dietary fiber content of food, and has health care functions of enhancing the moistening intestines, relaxing bowel, satisfying appetite, reducing fat, resisting oxidation, preventing cancer and the like.

The invention provides an ultrasonic-assisted mineralized refuse participating method for treating organic waste water by homogeneous Fenton. The method includes the following steps of (1) directly adding a ferrous ion salt, hydrogen peroxide (H2O2) and mineralized refuse powders into the waste water, and adjusting the potential of hydrogen (pH) value to 5 to 6; and (2) adding the waste water into an ultrasonic reactor, performing an ultrasonic action for 1 to 5 minutes, then performing a purification treatment, simultaneously stirring, precipitating after reaction, and performing a solid-liquid separation to complete the waste water treatment. The ultrasonic-assisted mineralized refuse participating method for treating the organic waste water by the homogeneous Fenton has the advantages that cumbersome synthetic steps of prior load type iron oxide catalysts are omitted, besides, the porosity of the mineralized refuse is high, the specific surface area is large, the mineralized refuse is low in cost and easy to obtain, a cation exchange characteristic of the mineralized refuse is utilized, iron ions can be exchanged to the surface of the mineralized refuse while the iron ions exert an catalytic action, the iron ions are prevented from losing, the iron ions in water are prevented from being polluted, the possibility of reutilization is improved, and the reaction can be completed within a short time by the aid of a dispersing function and a cavitation characteristic of ultrasonic waves.

The invention belongs to the technical field of sewage treatment, and in particular relates to application of low-silicon micro-pore NaA type and NaX type molecular sieves in treatment of low-concentration heavy metal ions. The invention solves the problem that the concentration of the low-concentration heavy metal ions is not up to standard in primary treatment of sewage through selecting proper conditions to carry out exchange separation under the trace concentration; the concentration of the low-concentration heavy metal ions in the sewage, which is subjected to secondary treatment through the technology, is far lower than the industrial standard; and the application has the advantages of easiness in operation of exchange steps and conditions, and low cost, and is very suitable for a sewage treatment process in industry. Through regeneration, after the molecular sieves are exchanged, most of the absorbed heavy metal ions are replaced to sodium ions, and the regenerated molecular sieves are recycled. The NaX and the NaY related by the invention are obtained by hydro-thermal synthesis, and a ratio of silicon to aluminum is 1: 1-1: 3.

The invention discloses composite aggregate planting concrete with a decontamination function. The aggregate planting concrete with the decontamination function comprises, by mass, 17%-31% of cement, 1%-4% of zeolite powder, 2%-3% of water, 12%-62% of rubble and 15%-52% of ceramsite. A preparation method of the planting concrete comprises the following steps that the weighed ceramsite is soaked in water for 30 minutes to 60 minutes, and unnecessary water is filtered out naturally; the weighed rubble, the weighed cement, the weighed zeolite powder and the wet ceramsite are placed in a stirring machine and stirred for one minute; then, the water is added while stirring is conducted; the concrete is poured out after being stirred to be uniform; the concrete is obtained after being molded and cured for 28 days. The planting concrete has the advantages of being high in porosity and good in water permeation effect and has a significant adsorbing effect on SS, COD, TP, Pb, Zn and the like; meanwhile, plants rooting in gaps of the concrete can also absorb elements beneficial to growth of the plants, and double benefits are achieved.

The name of this invention is soluble dietary fiber of konjak, it belongs to soluble dietary fiber foods technology field. It mainly supports a soluble dietary fiber powder pouring boiling water for eating to give soluble dietary fiber of konjak function into full play, increas the scope of health function, strengthen the role of the cardiovascular system, and its health care action is superior to simple soluble dietary fiber of konjak. Its characteristic is that it is composed of the following materials according to the weight ratio: soluble dietary fiber of konjak 60 to 90; kudzu flavonoids 20 to 40; puerarin 20 to 40; california almond flour 10 to 30. The present invention has lipid-lowering, hypoglycemic, weight reduction and slimming thin, moistening the intestines and freeing the stool, poison eliminating and countenance preserving, lipid removing and blood cleaning, promoting enterogastric function etc. health care actions. The present invention is mainly used in soluble dietary fiber of konjak health food powder pouring boiling water for eating.

The invention discloses a process for preparing nutrition-containing soilless cultivation base material which comprises, stock preparation, calcinations, acid conventional processing, purification, replacing some substance in the zeolite aperture by means of dynamic reaction, cleaning again, adsorbing potassium sulphate, boric acid and other nourishing material completely in the zeolite, cleaning again, adjusting pH by charging acid, drying and packaging.

The invention discloses an environmentally-friendly water-saving water-holding fertilizer and a preparation method thereof. The environmentally-friendly water-saving water-holding fertilizer comprises the following raw materials in percentage by weight: 5-15% of diatomite, 5-15% of urea, 5-30% of lignite, 20-35% of bentonite and 30-45% of volcano basalt zeolite. The preparation method of the environmentally-friendly water-saving water-holding fertilizer comprises the following steps of: step 1: separately crushing diatomite, urea, lignite, bentonite and volcano basalt zeolite, drying to water content of 5-10% and screening by 180-200 mesh; step 2: stirring for mixing diatomite, urea, lignite, bentonite and volcano basalt zeolite powders acquired in step 1 for 30 minutes; and step 3: adding the diatomite, urea, lignite, bentonite and volcano basalt zeolite powder mixture acquired in step 2 to a fermenting tank, adding microorganism Bacillus subtilis fermenting agent 1% of total weight, mixing and stirring for 15 minutes and naturally fermenting for 5-10 days. The invention has the advantages of simple preparation method, low cost, no pollution of a product, high fertilizer effect and good water-holding and water-saving effects, and is convenient to use,.

The invention discloses a micro-reactor system with a pulse diameter-variable microstructure and relates to the technical field of micro-reactors.The system comprises a raw material tank, a metering pump, a pressure gauge, a micro-reactor, a heat exchanger and a product collecting tank.The micro-reactor system has the advantages that the core unit of the system is the micro-channel structure inside the micro-reactor, the micro-channel structure can well enhance the material mixing effect, materials from two feeding inlets simultaneously enter a micro-channel pipeline with the pulse diameter-variable microstructure, the pulse diameter-variable microstructure allows the system to be in an evenly dispersing state after the high-speed cross collision of fluid, the fluid then enters the micro-channel with the continuous variable diameters, and the mixing effect of separation first and then combination is achieved; the channel of the reactor is high in heat exchanging ability, the system temperature is allowed to stay at the temperature beneficial to reaction, and the system is mild in reaction condition, short in reaction time, high in raw material utilization rate, capable of achieving effective control of a reaction process, safe and stable, capable of achieving continuous operation and high in production efficiency.

The invention provides a 3D printer controller supporting cloud services. The 3D printer controller mainly comprises a network interface and control unit and a motion control unit. The network interface and control unit comprises an Ethernet interface, a WIFI interface, a network processor and a data caching control device, and can independently communicate with a cloud server side and the motion control unit, and then exchange of 3D printing data and state and other information is achieved. The motion control unit adopts a high-real-time-performance microcontroller as a central processing unit to achieve real-time control and the like of real-time motion, feeding and extrusion of a printing head. The motion control unit and the network interface and control unit conduct two-way information exchange through synchronous serial or asynchronous serial interfaces. A double-CPU framework is adopted, 3D printing of the cloud services is achieved coordinately, and file transmission of a non-real-time network and 3D printing control with high real-time-performance requirements are effectively achieved.

The invention aims to provide a stichopus japonicus and abalone integrated-breeding method. In other words, both abalone and stichopus japonicus are put into abalone breeding cages and are bred in a shallow sea raft mode, and the stichopus japonicus and abalone integrated-breeding method is free of pollution and ecological and environmentally friendly. According to the method, the stichopus japonicus is bred in abalone breeding cages, the characteristic of deposition feeding habits of the stichopus japonicus is fully utilized, feces of the abalone in the breeding cages are removed, and the pollution of the organic matter in the feces of the abalone to the seabed is reduced. Meanwhile, the stichopus japonicus feeds organic detritus, benthic diatom and the like which are attached on the breeding cages so that the breeding environment can be cleaned, and flow inside and outside the breeding cages is smooth.

The invention discloses a building material with energy storage and temperature adjusting functions, and relates to the technical field of energy-saving building materials. The specific heat capacityand the heat storage capacity of the building material prepared by compounding a compound phase change material and a building matrix material are greatly higher than those of a common building matrixmaterial, meanwhile, the anti-aging capability is enhanced, and the flame retardancy is remarkably improved, and the building material can quickly carry out heat storage and heat release at the phasechange temperature so as to improve the heat storage and release efficiency, so that the temperature adjusting capability is improved, and meanwhile, the building heating and air conditioning equipment running time is shortened, the environmental pollution is reduced, and the comfort level is improved; meanwhile, the compound material has sound absorption, sound insulation, water resistance and fire resistance, has the advantages of no toxicity, no odor, light weight, high strength and safety, and is more beneficial to practical large-scale popularization and application.

The invention provides a medical collagen membrane with a compact outer layer and a loose inner layer in structure. Fish skin pepsin-solubilized collagen is dissolved in an acid solution to prepare collagen solutions with different concentrations, then laying is performed according to the concentrations from high to low, and pressing is performed to prepare a collagen membrane, wherein the fish skin pepsin-solubilized collagen is prepared by treating fish skin with alkali liquor, and then carrying out enzymolysis with pepsin under a weak acid condition; an enzymatic hydrolysate is centrifuged, a supernate is collected, and the supernate is salted out; precipitates are collected, the precipitates are redissolved with a weak acid solution, and then dialysis treatment is performed; and a dialysate is freeze-dried to prepare the fish skin pepsin-solubilized collagen. The collagen membrane prepared in the invention has three layers of different structures, the aperture of the inner layer is relatively large to promote the growth of osteoblasts, the small aperture of the outer layer can prevent soft tissue cells from entering and allow stem cells and nutrient substances to pass through, and a certain transition layer exists between the inner layer structure and the outer layer structure to facilitate tissue integration.

The invention provides a water-based coating based on nano-shell powder and a preparation method thereof, which is composed of the following components and parts by weight: 30-60 parts of nano-shell powder, 10-20 parts of calcined kaolin, 10-20 parts of heavy calcium, styrene-acrylic acid 20~30 parts of emulsion, 9~10 parts of solid resin solution, 5~20 parts of wax emulsion, 5~30 parts of defoamer, 10~20 parts of styrene, 3~5 parts of protective glue, 2~3 parts of cellulose colloid , 5~6 parts of starch colloid, 1.2~1.5 parts of methacrylic acid, 0.1~1.5 parts of initiator, 0.2~0.8 parts of antifungal agent, 2~3 parts of deionized water. The invention adopts green raw materials, the paint is safe and environment-friendly, has excellent effects of purifying indoor air and regulating indoor humidity, has simple production process and low preparation cost.

The invention discloses an efficient slow release composite fertilizer for wheat. The fertilizer comprises the following raw materials in parts by weight: 20-30 parts of ammonium chloride, 15-20 parts of potassium sulphate, 20-30 parts of mono-ammonium phosphate, 15-20 parts of a calcium-magnesium-phosphorus fertilizer, 5-19 parts of a white phosphorus fertilizer, 4-10 parts of pregelatinized starch, 2-4 parts of a full gemma microbial preparation, 20-30 parts of feather meal, 10-20 parts of gourmet powder residues, 20-40 parts of starch residues, 20-30 parts of sugar residues, 2-5 parts of tung oil, 5-10 parts of disproportionated rosin, 5-8 parts of lignosulfonate, 2-5 parts of polyvinyl alcohol, 4-8 parts of carboxymethyl cellulose, 20-30 parts of activated carbon, 30-40 parts of organic carbon, 5-8 parts of kaolin, 15-20 parts of attapulgite clay powder, 10-14 parts of weathered coal, 20-25 parts of zeolite powder, and 5-10 parts of calcium silicate. According to the invention, the efficient slow release composite fertilizer can improve soil, and is comprehensive in nutrition, and high in slow release effect.

The invention provides a modified hydrotalcite preparation method, which comprises: putting aluminum-magnesium hydrotalcite into a muffle furnace, heating to 480 DEG C at a heating rate of 5 DEG C.min<-1>, and roasting for 5 h; grinding, and screening with a 200-mesh sieve to obtain roasted modified hydrotalcite; and carrying out intercalation modification on the roasted modified hydrotalcite by using sodium dodecyl benzene sulfonate or diethyltriaminepentaacetic acid. According to the invention, the hydrotalcite is properly modified, so that the agglomeration can be reduced, and the dispersity is enhanced; and the interlayer ions are changed, so that the ion exchange reaction is promoted, and the high ion exchange capacity is achieved.

The invention belongs to the technical field of ion exchange resin, and relates to application of a composite initiating agent in preparation of the ion exchange resin. The application includes the steps of (1) adding industrial salt in a recycled NaCl liquid, stirring to dissolve, adjusting specific gravity, adding hydroxyethyl cellulose, and heating with stirring to obtain a water phase; (2) weighing and mixing acrylonitrile, methyl acrylate and triallyl isocyanurate, adding a mixed solution of the composite initiating agent and divinylbenzene, and adding methylbenzene with stirring to obtain an oil phase; (3) mixing the water phase with the oil phase, heating to react, transferring into an oil blowing kettle to filter off the liquid, adding hot water to immerse a ball body, stirring, heating to a certain temperature by vapor, reacting under the condition that pressure in the oil blowing kettle is controlled, and screening through a hot air drying screen to obtain polymerized white beads. By adopting the composite initiating agent, in a production and operation process, reactions are performed in stages, processes are enabled to be stable in reaction, operations are easy to control, and an obtained product is excellent in performance, safe and environment-friendly.

A laminar material for cleaning the anion-polluted water by removing the anions (F ions, arsenous radicals, or arsenic radicals) is prepared through proportionally dissolving Mg (or Zn) source and Al source in water, dissolving alkali and anions in water, quickly mixing them, stirring for 48-144 hr, pump filtering, water washing and baking to obtain white powder.

The invention relates to a method for performing natural soil greening on low-lying saline soil by using a soil conditioner containing chitosan. According to the formula of the soil conditioner, the soil conditioner comprises, by weight parts, 32-34 parts of fermented deer manure, 8-10 parts of sorghum straw powder, 5-7 parts of bentonite, 6-8 parts of biogas residue, 3-5 parts of phosphorite powder, 2-4 parts of chitosan, 2-4 parts of fish bone meal, 1-3 parts of peanut cake, 1-3 parts of egg-shell meal, 2-4 parts of soybean meal, 1-3 parts of ammonium bicarbonate, 1-3 parts of ammonium phosphate, 1-3 parts of ammonium chloride ferric sulfate, 1-3 parts of magnesium hydrogen phosphate, 0.5-0.7 part of phenylacetic acid, 1-3 parts of amino acid salt, 0.2-0.4 part of sodium nitrophenolate, 0.2-0.4 part of brassin, 0.2-0.4 part of gibberellin, 0.1-0.3 part of methanohalophilus zhilinae, 0.1-0.3 part of bacillus coagulans, 0.1-0.3 part of saccharomyces cerevisiae, 0.1-0.3 part of azotobacter vinelandii and 0.1-0.3 part of aspergillus oryzae.

The present invention relates to detergent, and discloses one kind of detergent without surfactant, soap, phosphate and 4A zeolite. The detergent is complex salt of sodium aluminosilicate and may be named as Na-P type detergent molecular sieve. It is prepared with flyash as main material, and through alkalization with sodium hydroxide to produce sodium silicoaluminate colloid, further reaction with limestone powder and coal gangue powder, ageing in alkali solution and roasting to obtain the quick soluble white crystal complex salt. The detergent may be further compounded into washing agent, washing powder or defatting agent with less pollution to water source. The present invention is environment friendly and low in cost.

The invention relates to the technical field of soil pollution remediation, provides a heavy metal polluted soil remediation agent, and solves the problem in the prior art that various soil remediation technologies have certain limitations, and cannot effectively solve soil heavy metal pollution. The remediation agent comprises the following raw materials in parts by weight: 40-60 parts of modified vermiculite, 3-6 parts of trisodium naphthalene-1,3,6-trisulphonate, 6-10 parts of biochemical fulvic acid potassium, 5-10 parts of succinic acid, 0.3-0.8 part of desulfurization bacillus subtilis,0.3-0.8 part of spirulina platensis, and 0.3-0.8 part of white rot fungi.

The invention provides a high-survival-rate sweet potato seedling breeding method. The method includes the steps of selecting and storing potato seeds, taking out the potato seeds one day before row planting to be placed in hot water at 50+ / -2 DEG C to be soaked for 5 min, adding brassinolide to the hot water, continuing to soak the potato seeds for 3-5 min, and taking out the potato seeds to be directly placed in composite plant ash to be rolled so that the surface of each potato seed can be covered with a thin layer of composite plant ash; selecting a land to construct a seedling bed, wherein the seedling bed comprises a surface layer, a composite soil layer, a nutrient soil layer, a loose heating layer and an isolation bottom layer from top to bottom, and the total thickness of the seedling bed is 30-40 cm; transplanting the potato seeds on the seedling bed to plant the potato seeds in rows obliquely with a sunny exposure, covering and sealing the potato seeds with a film tightly, keeping the temperature in the film at 33-34 DEG C, lowering the temperature to 25-27 DEG C after germination, and moving seedlings to a large field to be planted and inserted when the seedlings grow to be 15-20 cm long, wherein the potato seed spacing is 3-4 cm, the row planting amount of 10-12 kg / m<2>, and the weight of each potato seed is 500+ / -50 g. Through the reasonable potato seed processingand seedling bed arranging, the germination rate and neat rate of sweet potatoes are effectively increased, the seedlings are healthy and robust, and the after-transplanting survival rate is larger than 99.5%.

The invention discloses a battery membrane and a preparation method thereof. The battery membrane is prepared through taking a modified PP microporous membrane as a main membrane, laminating hydrophilic non-woven fabric as a liquid absorption layer and bonding the main membrane and the liquid absorption layer by using an adhesive. The modified PP microporous membrane is obtained through carrying out surface activation treatment on the PP microporous membrane through a solution containing a surfactant, taking out the PP microporous membrane and drying by using natural wind, wherein the solutioncontaining the surfactant is prepared through dissolving one or a composition of more of a phosphate compound, a sulfonate compound and a sulfate compound and a polyol compound into water. The prepared battery membrane has excellent liquid absorption capacity and liquid storage capacity and excellent ion exchange capacity through material modification and liquid absorption layer lamination underthe premise of maintaining good alkali resistance, wet strength and mechanical property, and the storage life and the service life of a battery are ensured. The membrane is applicable to the battery of using a strong alkaline solution as an electrolyte.

The invention relates to a dechlorination material in water treatment as well as preparation and use methods thereof. The dechlorination material is formed by mixing a compound (I), an adhesive and vitamin H together, the compound (I) is shown as the formula above. The preparation method comprises the following steps of: dissolving the adhesive into solvent to form colloidal fluid; adding the compound and vitamin H slowly into the colloidal fluid and stirring evenly for forming floury materials; granulating with a granulator or granulating by manually rubbing with a mesh sieve to make wet particles; and placing the wet particles into an oven for drying to make the dechlorination material. The invention has the advantages that the dechlorination material is a redox system of disordered non crystalline structure, has large void ratio, strong exchanging ability and long releasing period, can be used for specially treating residual chlorine in water with residual chlorine removing efficiency above 99 percent, and can be used for removing residual chlorine, iodine in tap water as well as other halogen elements, thereby achieving the aim of purification.

The invention discloses a method for improving the soil fertility of saline-alkali soil. The method comprises the following steps: (1) an organic fertilizer for improving saline-alkali soil are uniformly scattered into the saline-alkali soil, and then the soil is aired for at least two months, so that the organic fertilizer in the saline-alkali soil is fully dissolved; (2) seeds of salt-tolerant green manure plants such as alfalfa, sweet clover and the like are sown in the saline-alkali soil, wherein the sowing quantity is 2-3 kg per mu; (3) the sowing mode is strip sowing, the row spacing ranges from 15 cm to 20 cm, and the sowing depth ranges from 2 cm to 5 cm; and (4) cutting is not carried out in a first year, cutting is started in a second year, cutting is carried out in an initial flowering stage, cutting is carried out again after the cutting in the initial flowering stage is finished for 2 months, and the stubble height after cutting for the last time ranges from 6 cm to 7 cm,so that full overwintering is facilitated, wherein cutting is carried out for three times in a whole year, and the cutting time in a third year, a fourth year and a fifth year is the same as the cutting time in the second year. According to the invention, the biomass of crops planted in the saline-alkali soil is increased, the yield is improved, and the economic benefits of the unit area are improved to the largest extent.

The invention discloses a rare earth mining and extracting method. The rare earth mining and extracting method comprises the steps of stope preparation, ore leaching work, mother liquor collection, precipitation work and firing work. According to the rare earth mining and extracting method, ammonium chloride and ammonium sulfate composite salt serves as ore leaching liquid, the effect of complementing each other can be achieved by mixing ammonium chloride with ammonium sulfate together, ammonium chloride has high exchange capacity, but ammonium chloride also has replacement capacity for divalent ca, Sr and Ba, and the percent of pass of products can be affected; the exchange capacity of ammonium sulfate is inferior to that of ammonium chloride, but negative divalent So4 of ammonium sulfate has inhibition and leaching effects on positive divalent ca, Sr and Ba, and impurity removal of leaching liquid and reduction of consumption of a precipitator are facilitated; the ammonium chloride and ammonium sulfate composite salt serves as the ore leaching liquid, the rare earth extraction rate can be increased, and the rare earth purity is improved; and sesbania gum is arranged as a leaching aid, a good promotion effect is achieved on the leaching process of ionic rare earth ore, and meanwhile certain advantages are achieved on the aspects of reducing the concentration and the using amount of the ore leaching agent.