81 results about "Sphalerite" patented technology

The invention provides a composite reagent system and a chalcopyrite and sphalerite collecting method, and belongs to the technical field of mineral processing. The composite reagent system comprises a histidine derived functional group collecting agent and a black agent, and the histidine derived functional group collecting agent (containing a total sulfur ester group, a sulfydryl functional group and a side chain imidazole ring) serves as a core and is compounded with the black agent according to a specific proportion to form a target combination-synergistic interaction flotation mechanism. The histidine derivative collecting agent derives high-activity functional groups under the alkaline condition, and after sulfydryl is dissociated, stable chemical bonds are formed by the dissociated sulfydryl and metal ions on the surfaces of the chalcopyrite and the zinc sulfide. The black powder serves as an auxiliary collecting agent, and the collecting capacity of fine-grain or low-activity sulfide minerals is enhanced through chemical adsorption of dithiophosphate radicals and metal ions on the surfaces of the chalcopyrite and the sphalerite. After the two components are compounded, the selective enrichment efficiency of copper-zinc minerals in the flotation process is remarkably improved.

The invention provides a poly-like flocculation flotation method for micro-fine particle galena and micro-fine particle sphalerite. The method comprises the following steps: firstly, mixing to-be-treated ore samples containing micro-fine particle galena and micro-fine particle sphalerite with the particle sizes of less than or equal to 20 microns with water to obtain to-be-treated ore pulp, then sequentially adding zinc sulfate, diethyldithiocarbamate, polyoxyethylene, polyaluminum chloride and a foaming agent, and carrying out air inflation flotation and foam scraping to obtain galena concentrate and tailings. ZnSO4 is adsorbed on the surface of the micro-fine-particle sphalerite in advance and generates a synergistic effect with polyaluminum chloride added subsequently, and N, N '-diethyldithiocarbamate is adsorbed on the surface of the micro-fine-particle galena in advance and generates a synergistic effect with polyoxyethylene added subsequently, so that galena hydrophobic floccules and sphalerite hydrophilic floccules with proper apparent particle sizes are formed; on one hand, the flotation recovery rate of the micro-fine particle galena can be increased, and on the other hand, mechanical entrainment of the micro-fine particle sphalerite can be reduced, so that the flotation separation efficiency of the micro-fine particle lead zinc ore can be effectively improved.

The invention discloses application of quaternary ammonium cation modified cellulose as a talc inhibitor, and belongs to the technical field of mineral separation. The quaternary ammonium cation modified cellulose has the following molecular structural formula: # imgabs0 #, R1, R2 and R3 are independently selected from hydrogen or quaternary ammonium salt groups, and at least one of R1, R2 and R3 is a quaternary ammonium salt group; and m / (m + n) is equal to 0.18-0.90. The talc flotation inhibitor has a good selective inhibition effect on talc flotation, and is particularly suitable for efficient flotation separation of metal sulfide ores (such as molybdenite, galena and sphalerite) and talc.

The invention relates to a copper sulfate-free copper-zinc sulfide ore flotation separation method, and relates to the technical field of mineral flotation separation. The method comprises the following steps: obtaining copper-zinc sulfide ore pulp; by taking ethionine ester as a collecting agent and lime as an inhibitor, carrying out copper-zinc bulk flotation on the copper-zinc sulfide ore pulp to obtain copper-zinc bulk concentrate and discardable tailings; zinc sulfate serves as an inhibitor, the copper-zinc bulk concentrate is subjected to regrinding treatment, and copper-zinc bulk concentrate pulp is obtained; copper flotation is conducted on the copper-zinc bulk concentrate pulp, and copper concentrate and copper tailing pulp are obtained; with ethionine ester as a collecting agent, the copper tailing ore pulp is subjected to sphalerite activation under the condition of aeration stirring, and activated sphalerite ore pulp is obtained; and carrying out flotation on the activated sphalerite by using lime as an inhibitor to obtain zinc concentrate. The scheme provided by the invention has the advantages that heavy metal pollution is avoided, the mineral separation cost is reduced, and the process adaptability is high.

The invention relates to the technical field of lead-zinc deposit resource exploration, and discloses a method for judging deposit types by utilizing machine learning and sphalerite trace elements. The method comprises the following steps: establishing a data set by using multi-element data of sphalerite in different types of lead-zinc deposits in a global range, establishing a sphalerite trace element classification model by using a support vector machine learning algorithm based on Tree-structured Parzen Estimator optimization, and performing classification prediction on sphalerite samples based on a trained TPE-SVM model. And outputting the probability and classification result of each ore deposit type, and evaluating the performance of the model by using each evaluation index. And explaining and analyzing feature importance of the trained classification model by adopting an SHAP method, and qualitatively analyzing the contribution of each trace element content combination in distinguishing different lead-zinc deposit types, so as to establish a sphalerite trace element distinguishing index system.

The invention discloses a flotation system for lead-zinc sulfide ore containing pyrrhotite, a technological method of the flotation system and a water treatment method, and belongs to the field of flotation and water treatment. Rough concentrate of the lead-sulfur mixed flotation tank is connected with the lead-sulfur concentration subsystem, tailings are connected with the lead-sulfur scavenging subsystem, lead-sulfur mixed flotation concentrate is connected with the thickener, overflow is connected with the buffer water pool, and underflow is connected with the lead-sulfur separation flotation tank. Lead rough concentrate is connected with the lead concentration subsystem, lead concentrate is connected with the filter press, and filtrate is connected with the buffer water pool. Roughing tailings are connected with a lead scavenging subsystem, sulfur concentrate is connected with a filter press, and filtrate is connected with a buffer water tank. Lead-sulfur mixed flotation tailings are connected with a zinc flotation roughing tank, zinc rough concentrate is connected with a zinc concentration subsystem, zinc concentrate is connected with a zinc concentrate filter press, and filtrate is connected with a buffer water pool. Roughing tailings are connected with the zinc scavenging subsystem and the sedimentation tank, and supernate is connected with the buffer water tank. The buffer pool is connected with ore grinding equipment. The problem that the pyrrhotite is difficult to inhibit after being activated in the zinc blende activation process is solved, the grade and the recovery rate of the zinc concentrate are improved, and the water treatment process is simplified.

The application discloses a beneficiation method for separating pyrrhotite from marmatite and a zinc-sulfur inhibitor, the raw ore is marmatite containing pyrrhotite and pyrrhotite, the zinc-sulfur inhibitor T28 is added into the raw ore for grinding to obtain a slurry, CuSO4 is added into the slurry for sufficient stirring, zinc collector ZY402 is added into the stirred slurry for zinc roughing to obtain roughing zinc concentrate and roughing zinc tailings, the roughing zinc concentrate is subjected to three times of cleaning operation, the roughing zinc tailings are added with the zinc collector for three times of scavenging, finally, zinc scavenging tailings and zinc concentrate are obtained, the zinc scavenging tailings are subjected to one time of sulfur roughing, two times of sulfur scavenging and one time of sulfur cleaning to obtain sulfur concentrate and tailings. The application has the advantages of simple technological process, low equipment investment, low reagent cost, high separation efficiency, strong adaptability to ore property fluctuation, stable process, great theoretical value and economic value for the development of lead-zinc ore beneficiation which meets the increasingly strict environmental protection requirements.

A method for preparing 7N indium based on a vacuum distillation method belongs to the technical field of high-purity indium extraction, and comprises the following steps: crushing sphalerite concentrate, carrying out acid leaching and electrolysis on crushed mineral powder to obtain crude indium ingots, arranging an electrostatic trap at the downstream of a cyclone separator, and carrying out corona treatment on passing steam flow in a discharge area to obtain the 7N indium. And carrying out primary distillation on the crude indium ingot to obtain a primary indium ingot. And trapping steam flow at an outlet of the cyclone separator for multiple times to remove particulate compounds in the primary indium ingot to obtain a secondary indium ingot. And the secondary indium ingot is placed in a vacuum distillation device, the vacuum degree is controlled to be within a set range, the secondary indium ingot is subjected to fractional distillation at different heating rates and distillation time, and the 7N high-purity indium is obtained. Wherein the particle compound is an InSb compound microdroplet, an In-Bi alloy particle and an In-Ga solid solution microdroplet. The method solves the problem that in the prior art, the fractional condensation and collection effect of high-purity indium is poor.

The invention discloses an organic inhibitor for galena and application of the organic inhibitor. The inhibitor is 3-mercapto-1 sodium propane sulfonate (MPS). Aiming at the characteristics of close copper and lead symbiosis, high iron and zinc content and fine disseminated particle size of raw ore, the method adopts the technological process of'copper and lead partial bulk flotation tailing discarding-bulk concentrate regrinding-copper and lead separation flotation ', and comprises the following steps: firstly, in a bulk flotation section, utilizing a zinc sulfate and sodium sulfite combined reagent to efficiently inhibit sphalerite and pyrite under a weakly alkaline condition; a large number of gangue and zinc-sulfur minerals are thrown away in advance; the method comprises the following steps of: carrying out superfine regrinding dissociation on obtained bulk concentrate, then carrying out separation operation, and in a copper-lead separation section, replacing traditional dichromate with 3-mercapto-1 sodium propane sulfonate (MPS), carrying out a closed-loop process of one-roughing, three-refining and three-sweeping, and supplementing an inhibitor in fine selection operation, so that efficient inhibition of galena and preferable flotation of chalcopyrite are realized. The technological process is rigorous in design, the reagent system is green and environmentally friendly, and the resource recovery rate of the low-grade complex ore is remarkably increased.

This invention discloses a flotation separation method for high-sulfur copper-zinc ore beneficiation, comprising the following steps: Step a. Classifying and grinding the high-sulfur copper-zinc ore, controlling the grinding fineness to ensure that the product particle size P80 is 120μm to 150μm; Step b. Performing a first-stage copper-zinc mixed flotation operation on the obtained grinding product: adding lime during the flotation process at a rate of 100g / t to 200g / t to adjust the pH value of the pulp to the range of 7.5 to 8.5, forming surface statics between chalcopyrite, sphalerite, and pyrite. Potential difference; an aerated flotation machine is used as the flotation equipment, and the selective collector O-ethyl-N-benzoyl thiocarbamate is added at a dosage of 25g / t to 30g / t for aerated flotation to obtain a copper-zinc-sulfur mixed concentrate; step c. the obtained copper-zinc-sulfur mixed concentrate is fed into a vertical spiral stirred mill for regrinding, and the regrinding fineness is controlled to P90≤20μm to achieve full mineral liberation and surface desorption; this invention can achieve precise separation of copper, zinc and sulfur, reduce costs and improve efficiency and increase the comprehensive utilization rate of resources.

The invention provides a sphalerite structure five-membered nano material. The chemical formula of the nano material is Cu Fe In < c > Sn < d > S < x >, a ranges from 2.5 to 3.5, b ranges from 0.5 to 1.5, c ranges from 0.5 to 1.5, d ranges from 0.5 to 1.5, and x ranges from 5.5 to 6.5. According to the five-membered nano material provided by the invention, the usage amount of rare elements in the aspect of components is reduced, the synthesis cost is reduced, and the P-type concentration is improved by introducing the element indium; the use of Fe can reduce anti-position defects in the nanocrystals, and thus photoelectric conversion efficiency can be improved.

The invention discloses a method for flotation separation of galena and sphalerite, and belongs to the technical field of mineral flotation. The method comprises the steps that sodium hypochlorite and manganese sulfate are added into lead-zinc bulk concentrate pulp for an oxidation reaction, filtering is conducted after the reaction, polyvinyl alcohol is added into filter residues for continuous reaction, and treated pulp is obtained; and then a collecting agent and a foaming agent are added, and efficient separation of galena and sphalerite is achieved through the flotation process of one-time roughing, three-time refining and two-time sweeping. Sodium hypochlorite and manganese sulfate have a synergistic effect in ore pulp, a hydrophilic oxide layer and an inorganic film are formed on the surface of the sphalerite, and polyvinyl alcohol further forms a compact organic adsorption layer through hydrogen bonds, so that inhibition on the sphalerite is enhanced. The method can effectively inhibit sphalerite and improve lead-zinc separation selectivity and efficiency, and is especially suitable for separation of complex lead-zinc ore.

The application discloses a kind of iron wurtzite and sulphide iron ore mineral asynchronous flotation separation method, belong to nonferrous metal sulphide mineral flotation technical field;The application promotes the flotation of iron wurtzite by slurry aeration, realizes the asynchronous flotation of iron wurtzite, pyrite and pyrrhotite by means of high selectivity collector CTB-2 and oxidant calcium hypochlorite, solves the problem of difficult separation of iron wurtzite and pyrrhotite, and uses high concentration copper sulfate as depressor to rapidly improve the grade of zinc concentrate, uses ferrous sulfate to realize the sulfur-free flotation of sulfur concentrate, and finally obtains high-quality zinc concentrate, first sulfur concentrate (pyrite) and second sulfur concentrate (pyrrhotite) products.The application optimizes and simplifies the beneficiation process, cancels the magnetic separation step in the traditional process, and realizes efficient separation of zinc and sulfur through single flotation method.

The application belongs to the technical field of standard substance preparation, and particularly relates to a sphalerite standard substance and a preparation method thereof. The preparation method of the sphalerite standard substance provided by the application comprises the following steps: mixing zinc acetate, ammonium sulfide, a multi-element mixed standard solution and water to perform a hydrothermal reaction, so as to obtain mixed sulfides mainly containing zinc sulfide; and performing hot-press sintering on the mixed sulfides mainly containing zinc sulfide, so as to obtain the sphalerite standard substance. The application combines the hydrothermal method and the hot-press method for the first time, and synthesizes a dense, solid and chemically uniform ZnS material, the matrix of which is consistent with the sphalerite crystal structure, the major components of which are consistent, and the element distribution of which is uniform, and the sulfur isotope composition of which is consistent with that of the sphalerite, so that the sphalerite standard substance is suitable for being used as a standard substance for sphalerite sulfur isotope analysis and trace element quantitative analysis.

The invention discloses an organic inhibitor for selectively inhibiting sphalerite as well as a preparation method and application thereof, and relates to the technical field of mineral processing. Aiming at the problem of poor effect of a fine-grained sphalerite inorganic inhibitor, lactic acid esterified starch synthesized by reacting starch with lactic acid is used as a novel inhibitor. The inhibitor is non-toxic and easy to degrade, and has the advantage of environmental protection. The use method of the inhibitor comprises the following steps: adding an organic inhibitor prepared from modified starch into sphalerite, and separating lead and zinc through one-step roughing, three-step refining and three-step sweeping. The added inhibitor is selectively adsorbed on the surface of the sphalerite to inhibit the hydrophobicity of the sphalerite and hinder the adsorption of xanthate, so that the floating of the sphalerite is effectively inhibited, and meanwhile, the floatability of the galena is kept; and finally, a collecting agent and a foaming agent are added for preferential flotation of galena, and efficient separation of lead and zinc is achieved.

The application discloses a mineralized filter element and a preparation method thereof and a water purifier. The mineralized filter element comprises a shell and a first filter element, a second filter element and a third filter element filled in the shell. The first filter element comprises calcareous cement filter material and modified sphalerite, the calcareous cement filter material comprises modified calcareous mudstone slurry and modified anorthite; the second filter element comprises an analcime composite material, the analcime composite material comprises modified analcime, activated carbon, chitin and a binder; and the third filter element comprises a sodium feldspar composite material, the sodium feldspar composite material comprises modified sodium feldspar, activated carbon, chitin and a binder. The application aims at solving the problem of poor taste of existing drinking water filtered by a reverse osmosis membrane.

An electrochemically mediated, hydrometallurgical method is provided for extraction of nickel, zinc, lead, silver, molybdenum, and / or copper from sulfide minerals. These metal concentrates, such as pentlandite, pyrrhotite, pyrite, sphalerite, galena, Ag2S, MoS2, etc., are contacted with nitric acid and cerium(IV) nitrates, cerium(IV) methanesulfonate, and / or cerium(IV) sulfate, as oxidative leaching agents to preferentially leach the target metals contained therein. The strong oxidizing capacity of cerium(IV) enables rapid dissolution of metal sulfides under ambient conditions. Cerium(IV) can be electrochemically regenerated and recycled for treatment of additional sulfide minerals. Target metal products can be extracted via processes such as solvent extraction and precipitation, enabling complete recovery, e.g., of nickel from pentlandite.

The present invention discloses a combined inhibitor for sphalerite and its application. The combined inhibitor includes a reducing substance and anthocyanin. As a combined inhibitor for sphalerite, it is used in the flotation separation of chalcopyrite and sphalerite or galena and sphalerite. After the raw ore is crushed and ground, a combined collector and a frother are added to the pulp to carry out copper-zinc or lead-zinc flotation operation. During the copper-zinc or lead-zinc separation operation, the combined inhibitor is added as a sphalerite inhibitor, isoamyl xanthate is used as a chalcopyrite or galena collector, and No. 2 oil is used as a frother. The foam product is a copper concentrate or a lead concentrate, and the bottom tank product is a zinc concentrate. The combined inhibitor of the present invention has a strong inhibitory effect on sphalerite and can effectively achieve the flotation separation of chalcopyrite and sphalerite or galena and sphalerite. The reducing substance can enhance the inhibitory effect of anthocyanin on sphalerite and reduce the amount of anthocyanin used, thereby improving the separation effect of copper-zinc and lead-zinc sulfide ores while reducing the mineral processing cost.

The present application relates to a kind of based on sphalerite trace element discriminant deposit type method;Belong to deposit prospecting technical field.The present application first proposes to build sphalerite trace element database and constructs sphalerite trace element training set and test set and combines machine learning method, and widely exists in the sphalerite trace element of various types of deposit as the mark of judging its deposit type, improves the prospecting efficiency and accuracy of the deposit related to sphalerite, while solving the problem that the deposit deep edge prospecting is difficult and cost is high.

This invention provides a beneficiation method for separating lead and zinc in lead-zinc sulfide ores containing extremely low levels of copper sulfide. The method involves pretreatment of the slurry with a heavy metal ion shielding agent, stirring with an active zinc sphalerite remover, and finally adding a collector to capture the lead minerals. The process is environmentally friendly and has good applicability. When processing lead-zinc sulfide ores with a copper grade of no more than 0.05%, the lead concentrate has a lead grade of over 60%, the zinc grade is no more than 6%, and the lead recovery rate is over 90%. The zinc concentrate has a zinc grade of over 42%, and the zinc recovery rate is over 90%.

The invention provides a flotation separation inhibitor for copper-zinc sulfide ore, and relates to the technical field of preparation of inhibitors through mineral flotation. The inhibitor is prepared from the following raw materials: sodium zincate, maleic anhydride modified starch, an acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, tea polyphenol, vanillin and modified xanthan gum. The raw materials of the inhibitor can achieve a synergistic effect, the complexing efficiency of the inhibitor and metal ions can be improved, and the situation that Cu < 2 + > released by chalcopyrite in the flotation separation process activates sphalerite, so that the action effect is affected is avoided; the inhibitor can form an obvious selective adsorption effect on the surface of sphalerite to form a uniform and stable hydrophilic film, flotation of sphalerite is effectively inhibited, impurities introduced into copper concentrate are effectively reduced, more zinc minerals are reserved in flotation copper tailings, the grade and the recovery rate of copper in the copper concentrate are improved, and the flotation effect of sphalerite is improved. And the flotation separation effect of the copper-zinc sulfide ore is improved.

This invention relates to the field of mineral processing flotation reagents, specifically disclosing a high-efficiency collector for the flotation of sphalerite and its preparation method. The high-efficiency collector provided by this invention achieves synergistic enhancement of the functions of each component by compounding isopropyl xanthate, dialkyl dithiocarbamate, and mercaptoacetate, and introducing a designed and synthesized polymeric synergist. The three basic collector components together constitute a dense and stable primary hydrophobic adsorption layer. The introduced synergist, on the one hand, enhances the adsorption strength and selectivity on the surface of sphalerite through multiple functional groups; on the other hand, its grafted hydrophilic polymer chains can form steric hindrance at the mineral-water interface and regulate local hydrophilicity and hydrophobicity, thereby further optimizing the hydrophobic state of the mineral surface and inhibiting gangue inclusions. The composite reagent provided by this invention improves the recovery rate of useful minerals while ensuring concentrate quality.

The invention belongs to the technical field of mineral separation, and particularly relates to a marmatite-containing composite collecting agent and an application method thereof. According to the marmatite-containing composite collecting agent, marmatite with the iron content higher than 10% can be stably and effectively collected, the marmatite-containing composite collecting agent has high selectivity on marmatite, and the high collecting effect on pyrite minerals cannot be generated; compared with the prior art, the composite collecting agent provided by the invention is simple in preparation mode and remarkable in selective collecting effect on target minerals. In addition, the marmatite-containing composite collecting agent can also be used as a collecting agent of common marmatite.

A kind of jamesonite and marmatite flotation separation method, comprising the following steps: (1) the lead-zinc ore containing jamesonite and marmatite is ground, so that the content of-74 microns is 80-90%, to obtain the concentration of 30-40% flotation slurry;(2) put Congo red dye into stirring barrel to make 5% mass concentration solution;(3) add 300-1200g / t Congo red dye to neutral pH slurry, and react with slurry for 5min, then add ethion and frother, after pulp conditioning, carry out flotation to obtain lead rough concentrate;(4) carry out cleaning operation on lead rough concentrate, only add Congo red dye in cleaning, and the amount of reagent is 50% of the previous operation.Middlings are returned to the previous operation in turn.The present application uses Congo red dye as depressor, which has good selectivity to marmatite, and can realize efficient separation of jamesonite and marmatite at neutral pH.

The application belongs to the technical field of mineral processing, and discloses a method and system for promoting and activating the flotation of iron marmatite by using a complexing agent; after crushing and grinding the iron marmatite ore or mixed ore sample to be treated, a slurry is prepared and slurried; EDTA-2Na, an activator of copper sulfate and a xanthate collector are sequentially added to the obtained slurry, and the slurry is slurried; the obtained slurry is subjected to flotation according to a conventional process, and an iron marmatite concentrate can be obtained; according to the new technical route of dissolving and complexing zinc and iron ions on the surface of iron marmatite by EDTA-2Na, EDTA-2Na is added to the flotation slurry system to create the condition of micro-dissolution of the surface of iron marmatite, and under this reagent system, a NH4 + -Cu 2+ system is formed, the surface of the iron marmatite mineral is successfully promoted to form a more active interface, the recovery rate of the zinc concentrate is improved, the process is simple and easy to operate, the amount of copper sulfate is reduced, and the development of green mineral technology is facilitated.

The invention discloses a method for recycling antimony and separating marmatite from jamesonite and application of the method, and relates to the technical field of mineral separation. A proper gangue mineral inhibitor is selected to effectively inhibit the combination of marmatite in jamesonite and a collecting agent, and the gangue mineral inhibitor is added in the ore grinding process to increase the combination of the gangue mineral inhibitor and the marmatite; furthermore, a proper collecting agent is selected, so that the collecting agent can be coordinated with metal ions of jamesonite, the collecting capacity is high, targeted selectivity is achieved, and follow-up flotation is facilitated. Through the mixing process in the ore grinding and size mixing process, the acting time of the gangue mineral inhibitor and the collecting agent and the target mineral can be effectively prolonged, the selectivity of the gangue mineral inhibitor and the collecting agent is enhanced through cooperation of the gangue mineral inhibitor and the collecting agent, marmatite entering concentrate is reduced, and the recovery rate of antimony in the concentrate is increased.

The present disclosure provides a quantum dot coated with a blue light absorbing layer and a preparation method thereof. Specifically, the present disclosure provides a luminescent quantum dot coated with at least one blue light absorbing layer, comprising an alloy core composed of cadmium, selenium, zinc and sulfur, a first shell having a sphalerite structure and coated on the surface of the alloy core, and at least one second shell having a wurtzite structure, wherein the elemental proportions of zinc and sulfur each account for 30 to 50% of the entire core, and the content of cadmium and selenium decreases from the center of the core to the outside. The present disclosure also provides a method for preparing the core-shell type luminescent quantum dot. Through the alloy core, the first shell having a sphalerite structure and the second shell having a wurtzite structure, the core-shell type quantum dot can achieve a quantum efficiency of more than 95%, and has high temperature resistance and excellent water and oxygen isolation properties.

The invention relates to the technical field of sphalerite flotation, in particular to a method for strengthening sphalerite flotation. A method for strengthening flotation of sphalerite comprises the following steps that oxidized sphalerite and a potential regulating agent solution are mixed, the potential of the potential regulating agent solution is controlled to range from-0.55 V to 0 V and is not 0 V, and a mixed system is obtained; washing the solid material in the mixed system to obtain a washed material; and carrying out flotation treatment on the washing material. The method has the advantages of being environmentally friendly, simple in process, low in cost and remarkable in effect.

The invention provides a mineralized filter element based on a natural rock material as well as a preparation method and application of the mineralized filter element. The mineralized filter element is prepared from a main material and an auxiliary material, wherein the main material adopts a modified natural rock material, and specifically comprises modified celestite, modified medical stone, modified spodumene, modified zeolite, modified dolomite, modified sphalerite, modified magnesite and modified quartz porphyry; the auxiliary materials comprise activated carbon and a binder. The preparation method sequentially comprises the steps of modifying, burdening, canning, compacting, baking and demolding. Wherein the modification comprises the following steps: sequentially carrying out acid pickling, water washing, calcining, cooling, crushing and screening on the natural rock material, so as to obtain the modified natural rock material. Natural rock materials are extracted from the nature to be modified and added into the mineralization filter element, various mineral elements needed by the human body can be released, remineralization of low-mineralization-degree water is achieved, and large-scale application and popularization are facilitated.

This invention discloses a zinc oxide ceramic with tunable nonlinear coefficient, its preparation method, and its applications, belonging to the field of functional ceramics and their preparation technology. This invention solves the problem that existing ZnO-based varistor ceramics cannot achieve tunable nonlinear coefficients. This invention uses AlN as an additive to dope and modify ZnO, utilizing the significant difference in conductivity between AlN and ZnO to construct a Schottky barrier within the ZnO grains, inducing the varistor properties of the ZnO ceramic; and AlN and ZnO have the same crystal structure, Al... 3+ Ions can easily enter the ZnO lattice, achieving the purpose of improving nonlinear characteristics through doping. This allows AlN to simultaneously act as a varistor and a doping modifier for ZnO, resulting in doped zinc oxide ceramics that possess both a single-phase cubic zinc sphalerite-type zinc oxide structure and varistor properties. By changing the doping content of AlN, the nonlinear coefficient and varistor potential gradient can be controlled, thus broadening the application range of zinc oxide ceramics.