58 results about "Calcium sulfide" patented technology

The invention discloses a method for reducing and decomposing ardealite under the assistance of hydrogen, which comprises the following steps: mixing crushed and sieved ardealite and lignite, placing the mixture in a tubular furnace, and reacting for 1-2.5 hours in a hydrogen atmosphere with the volume concentration of 20-100% at 700-800 DEG C to obtain a calcium sulfide product; according to the method, efficient resource utilization of the phosphogypsum can be achieved, meanwhile, the emission amount of CO2 is greatly reduced, and the method is simple and easy to implement and can play a reference role in industrial production and market popularization and application.

The invention discloses a double-shell calcium carbonate / calcium sulfide loaded charcoal adsorbent as well as preparation and application thereof, and belongs to the technical field of adsorbents. The double-shell calcium carbonate / calcium sulfide loaded charcoal adsorbent takes kelp charcoal as a core, calcium sulfide as an inner shell and calcium carbonate as an outer shell. The preparation method comprises the following steps: pretreating kelp powder by using calcium sulfite to obtain pretreated kelp particles; carbonizing the pretreated kelp particles to obtain calcium oxide / calcium sulfide loaded biochar; and aging the calcium oxide / calcium sulfide loaded charcoal twice to obtain the double-shell calcium carbonate / calcium sulfide loaded charcoal adsorbent. The double-shell calcium carbonate / calcium sulfide loaded charcoal adsorbent has the characteristics that the raw materials are easy to obtain, the preparation method is green, environment-friendly and convenient, the adsorption sites are rich, and the like, has relatively high adsorption capacity on Cd (II), and can be used for repairing a Cd (II) polluted water body.

The invention provides a calcium sulfide preparation method and production system, and the method comprises the following steps: gypsum powder is preheated and dehydrated, and the preheating temperature is 800-900 DEG C; heating the solid sulfur to 500-900 DEG C to generate sulfur gas; the sulfur gas and the preheated gypsum powder are introduced into a suspension reactor for a reduction reaction, calcium sulfide and tail gas are generated, the reaction temperature is controlled to range from 800 DEG C to 1200 DEG C, and the tail gas comprises SO2; and the calcium sulfide is cooled. According to the calcium sulfide preparation method provided by the invention, the solid sulfur is used as a reaction raw material to produce calcium sulfide, so that the problems of long reaction time, low efficiency, low calcium sulfide quality and the like in production of calcium sulfide by reducing gypsum with sulfur in the prior art are solved.

The invention is suitable for the technical field of ceramic materials, and relates to lanthanum calcium sulfide transparent ceramic powder and a preparation method thereof. Comprising the following steps: weighing nitrate containing La and Ca according to a certain molar ratio, respectively dissolving into deionized water, and uniformly mixing to obtain a solution A; adding a citric acid solution into the solution A, adjusting the pH value with ammonia water, and stirring to obtain a mixed solution; the mixed solution is heated and stirred for a period of time, white transparent sol is formed through hydrolysis and polymerization reaction, and then the sol is placed in a drying box to be dehydrated into dry gel; heating the dried gel at high temperature to obtain lanthanum calcium sulfide precursor powder; and putting the lanthanum-calcium sulfide precursor powder into a tubular furnace, and vulcanizing in a sulfur-containing atmosphere to obtain the lanthanum-calcium sulfide powder. The method has the beneficial effects that the operation steps are simple, and the production cost and the production difficulty are effectively reduced. And gel organic components are removed by means of spontaneous combustion treatment, and the raw material proportion and reaction conditions are accurately controlled, so that the powder purity is greatly improved. In the hydrolysis and polymerization reaction, citric acid complexation is utilized and reaction conditions are strictly controlled, so that the particle size of the powder is uniform, the dispersity is good, and the transparency, the mechanical property and the optical property of the transparent ceramic are improved. Besides, by adjusting parameters such as raw material proportion, solution pH value, reaction temperature and time and the like, the performance of the powder is flexibly regulated and controlled, and diversified requirements on the performance of the lanthanum calcium sulfide ceramic powder in different application scenes are met.

The invention discloses a green roasting method for recycling desulfurized gypsum, and belongs to the technical field of solid waste recycling. According to the process disclosed by the invention, the desulfurized gypsum solid waste rich in calcium sulfate is used for replacing part or all of sulfate to be mixed with lepidolite for roasting reaction, and components such as calcium carbonate and calcium sulfite contained in the desulfurized gypsum are utilized by controlling the step-by-step heating rate and the roasting temperature; under specific roasting process conditions, calcium oxide and calcium sulfide generated through self-reaction serve as purifying agents and react with fluorine and thallium to form stable calcium fluoride and thallium sulfide precipitates, fluorine and thallium are fixed in the high-temperature roasting stage, the pressure of follow-up flue gas treatment and wastewater treatment is effectively reduced through self-purification, and environmental pollution is reduced.

The invention is suitable for the technical field of ceramic materials, and relates to lanthanum calcium sulfide transparent ceramic powder with wide spectrum transmittance and a preparation method of the lanthanum calcium sulfide transparent ceramic powder. The preparation method specifically comprises the following steps: weighing nitrate containing La and Ca according to a specific molar ratio, respectively dissolving the nitrate containing La and Ca into deionized water, and fully mixing to obtain a solution A; adding a thiourea solution into the solution A, and stirring to obtain a mixed solution; heating and continuously stirring the mixed solution, and carrying out hydrolysis and polymerization reaction to form white sol; then, the sol is placed in a drying oven to be subjected to dehydration treatment until the sol is converted into dry gel; and heating the dried gel at high temperature to obtain lanthanum calcium sulfide precursor powder. And putting the lanthanum-calcium sulfide precursor powder into an atmosphere furnace, and carrying out vulcanization reaction in a sulfur-containing atmosphere to prepare the lanthanum-calcium sulfide powder. The preparation method has the advantages that the operation process is simple, the prepared powder is uniform in particle size, high in purity and excellent in dispersity, and the optical performance of the transparent ceramic can be improved.

Disclosed is an eye drop composition for treating and preventing eye diseases. The eye drop composition for treating and preventing eye diseases contains, as active ingredients, minerals that have lost at least one electron, selected from germanium (Ge), silver (Ag), iridium (Ir), nickel (Ni), palladium (Pd), tantalum (Ta), antimony (Sb), zinc (Zn), indium (In), boron (B), astatine (At), thallium (Tl), magnesium carbonate (MgCO3), tin (Sn), iron (Fe), calcium sulfide (CaS), molybdenum (Mo), chromium (Cr), sodium (Na), tungsten (W), gallium (Ga), strontium (Sr), potassium (K), beryllium (Be), barium (Ba), magnesium (Mg), scandium (Sc), yttrium (Y), calcium (Ca), titanium (Ti), vanadium (V), hafnium (Hf), bromine (Br), zirconium (Zr), copper (Cu), manganese (Mn), rubidium (Rb), technetium (Tc), platinum (Pt), niobium (Nb), gold (Au), phosphate (Pi), rhenium (Re), ruthenium (Ru), cobalt (Co), zinc oxide (ZnO), aluminum (Al), selenium (Se), bismuth (Bi), phosphorus (P), rhodium (Rh), silicon (Si), iodine (I), tellurium (Te), sulfur (S), lithium (Li), osmium (Os), magnesium hydroxide (Mg(OH)2), and cesium (Cs), wherein the minerals are at least five types of minerals. The eye drop composition is very safe for the human body, and thus can be very effectively used as an eye drop agent for treating and preventing eye diseases, as well as for completely curing cataracts.

The application discloses a hydrogen fuel engine oil composite additive composition, which comprises 3.0-5.0% high-alkali-value magnesium sulfonate, 12.0-20.0% low-alkali-value calcium sulfonate, 3.0-4.0% high-alkali-value calcium sulfide alkyl phenol, 2.0-5.0% amine type antioxidant, 2.0-5.0% phenol type antioxidant, 2.0-5.0% alpha-naphthylamine, 1.5-3.0% dibutyl dithiocarbamic acid ester, 1.5-3.0% anti-wear agent, 0.2-0.5% fatty amide, and the rest is ashless dispersant. The application further discloses a hydrogen fuel engine oil composition, which comprises 14.4-15.5% composite additive composition, 7.0-9.0% tackifier, 0.2-0.5% pour point depressant, and the rest is base oil. The composite additive improves the demulsification performance of the hydrogen fuel engine oil under high-temperature and high-pressure conditions, and further improves the water separation property and other comprehensive use performances of the oil product.

The invention discloses a double-shell calcium carbonate / calcium sulfide loaded biochar adsorbent and its preparation and application, belonging to the technical field of adsorbents. The double-shell calcium carbonate / calcium sulfide loaded biochar adsorbent uses kelp biochar as the core, calcium sulfide as the inner shell layer, and calcium carbonate as the outer shell layer. The preparation method is as follows: pretreat kelp powder with calcium sulfite to obtain pretreated kelp particles; carbonize the pretreated kelp particles to obtain calcium oxide / calcium sulfide loaded biochar; the calcium oxide / calcium sulfide loaded biochar is subjected to two aging treatments to obtain the double-shell calcium carbonate / calcium sulfide loaded biochar adsorbent. The double-shell calcium carbonate / calcium sulfide loaded biochar adsorbent of the invention has the characteristics of easily available raw materials, green, environmental-friendly and convenient preparation method, rich adsorption sites, etc., has a high adsorption capacity for Cd(II), and can be used for the repair of Cd(II)-polluted water bodies.

The invention provides an ex-situ chemical reduction stabilization remediation method for hexavalent chromium contaminated soil, which comprises the following steps: collecting soil from a contaminated land parcel, airing, crushing, screening and uniformly mixing to obtain pretreated contaminated soil; testing the content of hexavalent chromium in the polluted soil, then adding solid calcium polysulfide into the polluted soil according to the molar ratio of the solid calcium polysulfide to the hexavalent chromium of (12-16): 1, and uniformly mixing; and after uniform mixing, spraying water into the polluted soil according to 15-20% of the total solid mass, and carrying out static maintenance. According to the stable remediation method, the remediation target value (the hexavalent chromium in the soil is lower than 5.7 mg / kg) is achieved on the third day of maintenance, the remediation effect is continuous and good, and rebounding does not occur.

The present invention discloses a method for preparing a high-cementing active material using aluminum ash, comprising the following steps: (1) mixing phosphoric acid solution and aluminum ash, stirring, and irradiating with low-temperature plasma to obtain ammonium-converted phosphorus-aluminum mortar; (2) mixing gypsum, quicklime, and light-burned magnesium oxide, stirring evenly, and obtaining high-activity sulfur-calcium-magnesium powder; (3) mixing the ammonium-converted phosphorus-aluminum mortar of step (1) and the high-activity sulfur-calcium-magnesium powder of step (2), stirring, and putting into a mold for curing to obtain a high-cementing active material. The preparation process of the present invention is simple, and the resource utilization of aluminum ash can be quickly realized; in the process of utilizing aluminum ash, the problem of aluminum ash releasing ammonia, methane gas, and hydrogen when it comes into contact with water can be well solved; the cementitious material prepared by the present invention has high activity, and the maximum uniaxial compressive strength of the prepared test block can reach 56.72MPa.

The invention provides application of water-soluble inorganic sulfide in improvement of plant salt stress resistance and / or improvement of saline-alkali soil, relates to the technical field of agriculture, and provides application of water-soluble inorganic sulfide in improvement of plant salt stress resistance and / or improvement of saline-alkali soil. The water-soluble inorganic sulfide is selected from at least one of potassium sulfide, ammonium sulfide and calcium polysulfide, the potassium sulfide, the ammonium sulfide and the calcium polysulfide can effectively improve the germination ability of plant seeds under salt stress, and the calcium polysulfide can effectively improve the plant antioxidant system activity and the plant photosynthesis efficiency; the survival rate and the growth performance of the plants under salt stress are effectively improved; the water-soluble inorganic sulfide solution can effectively reduce the EC value of the saline-alkali soil, so that the germination rate of plant seeds in the saline-alkali soil is effectively increased, and the saline-alkali soil is effectively improved. Therefore, the application provided by the invention is of great significance in fully utilizing saline-alkali land resources and improving the crop yield.

The invention provides a method for preparing calcium sulfide through reaction of calcium oxide and gaseous sulfur and a production system thereof. The method comprises the following steps: heating and gasifying solid sulfur at 500-900 DEG C to form sulfur flue gas with the S2 volume content of 80% or above; preheating the calcium oxide powder to form preheated calcium oxide powder; respectively introducing the sulfur flue gas and the preheated calcium oxide powder into a suspension reactor for gas-solid reaction to generate calcium sulfide and tail gas; and cooling the calcium sulfide. The production system comprises a sulfur gasification device for gasifying solid sulfur; the suspension preheater is used for preheating calcium oxide powder; and the suspension reactor is respectively connected with the sulfur gasification device and the suspension preheater and is used for carrying out gas-solid reaction on calcium oxide powder and gaseous sulfur to generate calcium sulfide and tail gas. According to the method, high-purity calcium sulfide can be effectively prepared, pollution emission and energy consumption are effectively reduced, green production and manufacturing are achieved, and high economic value and social benefits are achieved.

Water containing less than 60 Hz of minerals is disclosed. The water containing less than 60 Hz of minerals contains, as active ingredients, 0.04-34 parts by weight of minerals from which at least one electron has been removed, among germanium (Ge), silver (Ag), iridium (Ir), nickel (Ni), palladium (Pd), tantalum (Ta), antimony (Sb), zinc (Zn), indium (In), boron (B), astatine (At), thallium (Tl), magnesium carbonate (MgCO3), tin (Sn), iron (Fe), calcium sulfide (CaS), molybdenum (Mo), chromium (Cr), sodium (Na), tungsten (W), gallium (Ga), strontium (Sr), potassium (K), beryllium (Be), barium (Ba), magnesium (Mg), scandium (Sc), yttrium (Y), calcium (Ca), titanium (Ti), vanadium (V), hafnium (Hf), bromine (Br), zirconium (Zr), copper (Cu), manganese (Mn), rubidium (Rb), technetium (Tc), platinum (Pt), niobium (Nb), gold (Au), phosphate (Pi), rhenium (Re), ruthenium (Ru), cobalt (Co), zinc oxide (ZnO), aluminum (Al), selenium (Se), bismuth (Bi), phosphorus (P), rhodium (Rh), silicon (Si), iodine (I), tellurium (Te), sulfur (S), lithium (Li), osmium (Os), magnesium hydroxide (Mg(OH)2), and cesium (Cs), mixed with 100 parts by weight of water, wherein there are at least 5 types of minerals.

The invention relates to the technical field of ceramic materials, in particular to calcium lanthanum sulfide transparent ceramic powder and a preparation method and application thereof.The preparation method comprises the following steps that CaS powder and La2S3 powder are placed in a sealed quartz container, the raw materials are mixed to be uniform in an ultrasonic rotation mode, high-temperature swing sintering is conducted in a vacuum state, then slow cooling is conducted to the room temperature, and the calcium lanthanum sulfide transparent ceramic powder is obtained. And grinding to obtain the CaLa2S4 powder. According to the preparation method of the CaLa2S4 powder, the problem of sulfur loss can be avoided in a limited mode, toxic and dangerous gas of hydrogen sulfide or carbon disulfide is not used, the preparation method is safe, efficient, easy to operate, low in raw material cost and suitable for industrial batch production, and further development of the infrared transparent ceramic application technology is expected to be promoted.

The application pertains to processes for producing components such as an alkali hydroxide and a carboxylic acid. The processes generally comprise reacting a component comprising calcium carbonate, or calcium sulfide, or calcium hydroxide, or calcium oxide, or calcium weak acid, or any combination thereof with a component comprising a carboxylic acid to form a component comprising a calcium carboxylate and a component comprising carbon dioxide, or hydrogen sulfide, or water, or any combination thereof. At least a portion of the formed calcium carboxylate is reacted with a component comprising an alkali sulfate to form a component comprising an alkali carboxylate and a component comprising calcium sulfate. At least a portion of the formed alkali carboxylate is electrochemically reacted to form a component comprising an alkali hydroxide and a component comprising a carboxylic acid.

This invention provides a method for preparing hydrogen and sulfur from solid waste gypsum through reduction and acidification in a cement kiln, relating to the field of solid waste disposal technology. The method involves targeted local modifications to a novel dry-process cement clinker rotary kiln production system. Using desulfurized gypsum, phosphogypsum, and other solid waste gypsum as raw materials, the gypsum is crushed, ground, preheated, and dehydrated. Then, it is calcined in a modified three-lobe gravity semi-suspended rotary kiln at 800–1100℃ in a reducing atmosphere to generate high-purity calcium sulfide. After sealed cooling, the calcium sulfide reacts with byproduct hydrochloric acid to produce high-purity hydrogen sulfide. The hydrogen sulfide is then used to co-produce hydrogen and sulfur via a medium-assisted electrochemical decomposition method, or high-purity sulfur can be directly prepared using the Claus process. This invention achieves full resource utilization of solid waste gypsum using existing cement kiln equipment, requires minimal modification, has low investment costs, and enables the cascade utilization of CO waste gas and kiln waste heat, reducing overall energy consumption by more than 30% compared to traditional processes.

The invention discloses a method for producing calcium sulfide by reducing gypsum with ammonia gas. Under the assistance of the solid-phase catalyst, the reaction of reducing the calcium sulfate by the ammonia gas at a relatively low temperature of 400-700 DEG C is realized, and the calcium sulfate is efficiently reduced into calcium sulfide. Under the dual action of the gas-phase ammonia gas and the solid-phase catalyst, calcium sulfate is in full contact with reducing gas molecules, the reaction is more sufficient, and the reaction efficiency is remarkably improved.

The application relates to the field of calcium sulfide, in particular to a kind of calcium sulfide prepared from biomass waste and reduced gypsum solid waste, a preparation method and application.The method comprises the following steps: raw material pretreatment, batching and mixing: the gypsum powder and biomass powder are mechanically mixed according to the mass ratio 10:(10-50) to obtain a reaction precursor; one-step reduction reaction: the reaction precursor is placed in a reactor in an inert atmosphere or a closed environment, heated to 800-1050 DEG C at a heating rate of 5-20 DEG C / min, and kept at the temperature for 0.5-2 hours; product treatment: after the reaction is completed, the reaction product is taken out and crushed and ground to obtain the final product under inert atmosphere cooling to room temperature.The product has a porous loose structure, a high specific surface area (actually up to 50-200 m 2 / g), and can simultaneously remove heavy metals (such as Pb 2+ , Cd 2+ ) in wastewater treatment, soil remediation and other scenarios, realizing the synergistic effect of "adsorption-precipitation".

The application provides a method for preparing metallic arsenic and sulfur fixation by calcium oxide assisted carbothermic reduction of arsenic sulfide residue, comprising: providing a reaction container with a high-temperature zone and a low-temperature zone in communication; reacting arsenic sulfide residue, calcium oxide and a carbon source in the high-temperature zone; the molar ratio of the calcium oxide to arsenic sulfide in the arsenic sulfide residue is not less than 2; the molar ratio of carbon in the carbon source to arsenic sulfide in the arsenic sulfide residue is not less than 2; the temperature of the high-temperature zone is 750-900 DEG C, the temperature of the low-temperature zone is 650-750 DEG C, and the temperature of the high-temperature zone is higher than that of the low-temperature zone; during the reaction, the generated metallic arsenic transfers to the low-temperature zone, and the generated calcium sulfide stays in the high-temperature zone. The application recovers metallic arsenic and fixes sulfur from arsenic sulfide residue through one-step smelting, avoids the generation of sulfur-containing gas, and improves the recovery rate of the metallic arsenic product.

This invention discloses a method for producing calcium oxide by reducing the decomposition temperature of phosphogypsum under hydrogen and steam conditions. In this method, after removing silica impurities from the phosphogypsum by acid washing with sulfuric acid solution, the phosphogypsum is reduced and decomposed under a hydrogen atmosphere to obtain calcium sulfide solid product. Subsequently, the hydrogen is turned off and steam is introduced, and the reaction continues under these conditions to produce high-purity calcium oxide. The exhaust gas generated during this process can be dried and used as feed gas for acid production. This method uses pretreated phosphogypsum as raw material to prepare high-purity calcium oxide, simultaneously achieving phosphogypsum reduction and sulfur resource recycling. It lowers the temperature for producing calcium oxide from phosphogypsum, significantly reducing energy consumption and eliminating carbon dioxide emissions compared to existing processes. This is a key technology for the green and sustainable development of phosphogypsum. Under these process conditions, phosphogypsum can be decomposed at a low temperature of 800℃ to obtain high-purity calcium oxide, achieving a calcium hydroxide yield of over 97.22%.

To develop a manufacturing method for baked salt of purple color having reduction property by baking once since the possible cause for the purple color was unknown and in addition needed to be baked nine times at high temperature although the source of reduction property for nine-times-baked purple bamboo salt in Korean tradition being calcium sulfide (Ca S) was clear.SOLUTION: This method includes adding 5% calcium sulfate, 2% powder type active carbon (or 5% sugar), and 2% iron rust (iron oxide) powder to ion exchange membrane salt, charging them into an alumina melting pot, and carrying out reduction firing for one hour at 1,100 to 1500°C. The development of purple color results from reduction firing of iron rust (iron oxide) and corresponds to coloring by reduction firing of colcothar in celadon glaze.SELECTED DRAWING: Figure 1

The present invention relates to a composition for treating and preventing atopy, the composition comprising at least five minerals of germanium (Ge), silver (Ag), iridium (Ir), nickel (Ni), palladium (Pd), tantalum (Ta), antimony (Sb), zinc (Zn), indium (In), boron (B), astatine (At), thallium (Tl), magnesium carbonate (MgCO3), tin (Sn). iron (Fe), calcium sulfide (CaS), molybdenum (Mo), chromium (Cr), sodium (Na), tungsten (W), gallium (Ga), strontium (Sr), potassium (K), beryllium (Be), barium (Ba), magnesium (Mg), scandium (Sc), yttrium (Y), calcium (Ca), titanium (Ti), vanadium (V), hafnium (Hf), bromine (Br), zirconium (Zr), copper (Cu), manganese (Mn), rubidium (Rb), technetium (Tc), platinum (Pt), niobium (Nb), gold (Au), phosphate (Pi), rhenium (Re), ruthenium (Ru), cobalt (Co), zinc oxide (ZnO), aluminum (Al), selenium (Se), bismuth (Bi), phosphorus (P), rhodium (Rh), silicon (Si), iodine (I), tellurium (Te), sulfur (S), lithium (Li), osmium (Os), magnesium hydroxide (Mg(OH)2), and cesium (Cs), wherein the minerals each lack at least one electron.

The carbon dioxide top and bottom blowing system comprises a liquid carbon dioxide storage tank, a heater, a buffer tank, a top blowing pipeline and a bottom blowing pipeline, a liquid carbon dioxide outlet end at the bottom of the carbon dioxide storage tank is connected to a feeding hole of the buffer tank through a pipeline; and the heater is arranged on a pipeline between the liquid carbon dioxide outlet end at the bottom of the carbon dioxide storage tank and the buffer tank. According to the system, carbon dioxide can react with carbon in molten steel, so that the carbon content is reduced, the consumption of oxygen is reduced, the production cost is reduced, and compared with argon, the carbon dioxide is generally cheaper, so that the production cost can be reduced by using the carbon dioxide; in addition, the carbon dioxide can react with sulfur in the molten steel to generate compounds such as calcium sulfide, so that the sulfur content in the steel is reduced, the quality of the steel is improved, and the nitrogen content in the molten steel can be reduced and the quality of the steel can be improved because the carbon dioxide does not contain nitrogen.

The utility model relates to the technical field of gas extraction, in particular to a gas extraction pipe with a concentration detection function, which comprises an extraction pipe body and a deacidification assembly, and the deacidification assembly comprises a gas inlet pipe, a connector, a treatment box and a deacidification plate. The gas inlet pipe, the connector and the treatment box are all made of stainless steel materials, gas and hydrogen sulfide are guided into the treatment box through the gas inlet pipe, the hydrogen sulfide is treated through quicklime on the deacidification plate to generate calcium sulfide and water, and therefore the hydrogen sulfide accompanying in the gas is removed, the gas is introduced into the extraction pipe body through the treatment box, and the gas is extracted from the extraction pipe body. Water generated by deacidification drips into the water collecting tank at the bottom of the treatment box to be collected, after a period of time, a worker takes down the water collecting tank to pour out water in the water collecting tank and takes out the deacidification plate to replace quick lime in the deacidification plate, operation is convenient and fast, the deacidification assembly is used for pretreating extracted gas, removing accompanying hydrogen sulfide in the gas, and the gas treatment efficiency is improved. And the extraction pipe body is protected from being eroded.

This invention discloses a sulfide solid electrolyte, its preparation method, and a battery, belonging to the field of battery material technology. The preparation of the sulfide solid electrolyte includes: thermally reacting the raw materials for the preparation of the sulfide solid electrolyte; tangentially filtering the material obtained after the thermal reaction; and spray-drying the solid obtained from the tangential flow filtration. The raw materials include a first precursor, a second precursor, and a solvent. The first precursor includes lithium sulfide, and the second precursor includes at least one selected from phosphorus pentasulfide, silicon sulfide, germanium sulfide, tin sulfide, sodium sulfide, potassium sulfide, ammonium sulfide, calcium sulfide, and arsenic sulfide. This method has a relatively simple process flow and operation, low energy consumption and cost, and high production efficiency, making it suitable for industrial production. The sulfide solid electrolyte obtained in this way is relatively soft, making it easier to contact the positive and negative electrodes under extrusion conditions during the further preparation of the battery, improving density, thereby facilitating electron transport and reducing losses.

The invention belongs to the technical field of water treatment, and particularly relates to a biochar wetland desulfurization and denitrification system based on a rotary reactor. The system comprises a rotary sulfate reduction unit and a charcoal-based artificial wetland unit which are connected in series, a rotary filler device, a Ca-charcoal complex layer and a granular calcium sulfide solid layer are arranged in the rotary unit, the concentration of SO4 < 2-> / S2 <-> is monitored in real time through an ion selective electrode, and filler lifting and wastewater backflow are linked; and the wetland unit adopts a charcoal-sand mixed matrix layer to plant reeds. And adsorbing and reducing SO4 < 2-> by the wastewater through the rotating unit to generate CaSO4 precipitate, and releasing S < 2-> to enter the wetland to drive sulfur autotrophic denitrification. The removal rate of SO4 < 2-> in high-sulfate and low-carbon-nitrogen-ratio wastewater is greater than 84%, the removal rate of NO3 <-> is greater than 66%, the COD effluent is less than 20mg / L, and the problems of high water mineralization degree and nitrogen removal inhibition are solved.

Disclosed is an eye drop composition for treating and preventing eye diseases. The eye drop composition for treating and preventing eye diseases contains, as active ingredients, minerals that have lost at least one electron, selected from germanium (Ge), silver (Ag), iridium (Ir), nickel (Ni), palladium (Pd), tantalum (Ta), antimony (Sb), zinc (Zn), indium (In), boron (B), astatine (At), thallium (Tl), magnesium carbonate (MgCO3), tin (Sn), iron (Fe), calcium sulfide (CaS), molybdenum (Mo), chromium (Cr), sodium (Na), tungsten (W), gallium (Ga), strontium (Sr), potassium (K), beryllium (Be), barium (Ba), magnesium (Mg), scandium (Sc), yttrium (Y), calcium (Ca), titanium (Ti), vanadium (V), hafnium (Hf), bromine (Br), zirconium (Zr), copper (Cu), manganese (Mn), rubidium (Rb), technetium (Tc), platinum (Pt), niobium (Nb), gold (Au), phosphate (Pi), rhenium (Re), ruthenium (Ru), cobalt (Co), zinc oxide (ZnO), aluminum (Al), selenium (Se), bismuth (Bi), phosphorus (P), rhodium (Rh), silicon (Si), iodine (I), tellurium (Te), sulfur (S), lithium (Li), osmium (Os), magnesium hydroxide (Mg(OH)2), and cesium (Cs), wherein the minerals are at least five types of minerals. The eye drop composition is very safe for the human body, and thus can be very effectively used as an eye drop agent for treating and preventing eye diseases, as well as for completely curing cataracts.

The application relates to a system for preparing valuable products by sectional fluid roasting of gypsum and a method thereof, and belongs to the field of comprehensive utilization of gypsum. The system comprises a feeding-dedusting system, a first roasting system, a second roasting system and a gas-solid separation-treatment system; the feeding-dedusting system, the first roasting system, the second roasting system and the gas-solid separation-treatment system are sequentially connected. The system is suitable for three different processes of gypsum -> beta-hemihydrate gypsum -> anhydrite, gypsum -> anhydrite -> calcium oxide + sulfur dioxide and gypsum -> anhydrite -> calcium sulfide by roasting different gases. Compared with traditional rotary kiln and shaft furnace roasting, the system realizes efficient mass and heat transfer of gas and solid. In the roasting process, sectional roasting technology is adopted, the roasting atmosphere (air, coal gas and hydrogen), the gas amount and the roasting temperature of the second roasting system are finely controlled, and the phase transformation of gypsum is accurately controlled. Compared with other roasting furnaces, the system has the advantages of low energy consumption, small floor area and high running rate.

The invention belongs to the technical field of agricultural light conversion materials, and discloses a modified calcium europium sulfide light conversion material, a preparation method thereof and an agricultural light conversion composite film containing the modified calcium europium sulfide light conversion material. The preparation method of the modified calcium-europium sulfide light conversion material comprises the following steps: dispersing CaS: Eu < 2 + > in a first alcohol solvent, then adding water, tetrafunctional alkoxy silane and a pH regulator, and carrying out a primary reaction; after the reaction is finished, centrifuging to obtain a light conversion material coated with a silicon dioxide layer; dispersing the light conversion material coated with the silicon dioxide layer in a second alcohol solvent, adding a silane coupling agent with a long-chain hydrophobic group, carrying out a secondary reaction, and centrifuging and washing after the reaction is finished, so as to obtain the modified calcium europium sulfide light conversion material. The modified calcium-europium sulfide light conversion material provided by the invention is high in chemical stability, the water and oxygen permeability can be remarkably reduced, and the stability of an agricultural light conversion composite film prepared from the modified calcium-europium sulfide light conversion material is remarkably improved in a damp-heat aging test.