464 results about "Dolomite" patented technology

The invention provides a mineralization composition as well as a preparation method and application thereof. The mineralization composition comprises modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine. The strontium ion dissolution amount of the modified celestite is 50 to 55 mg / L; the strontium ion dissolution amount of the modified strontium-containing dolomite is 15 to 20 mg / L; the metasilicate ion dissolution amount of the modified medical stone is 30 to 35 mg / L; the metasilicate ion dissolution amount of the modified zeolite is 40 to 45 mg / L; the metasilicate ion dissolution amount of the modified tourmaline is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified wollastonite is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified serpentine is 10 to 15 mg / L. The mineralization composition can stably and enduringly release strontium ions and metasilicate ions, and also can adjust the water quality to alkalescence, so that the water quality reaches the national drinking water standard, and safe and healthy drinking water can be provided for users.

The invention discloses double-layer fancy glaze with chapped ground texture and a preparation method of the double-layer fancy glaze, and relates to the technical field of ceramic glaze. The double-layer fancy glaze is composed of a ground glaze layer and a cover glaze layer. The ground glaze raw materials comprise potassium feldspar, kaolin, calcite, quartz, dolomite, zinc oxide and pigment; the cover glaze raw materials comprise potassium feldspar, waste porcelain powder, blank powder, chinastone, limestone, sepiolite, quartz, zirconium silicate with the particle size D50 being less than or equal to 1.0 mu m and pigment. The preparation method comprises the following steps: respectively carrying out ball milling to prepare ground glaze slip (32-40 baume degrees) and cover glaze slip (51-53 baume degrees); spraying ground glaze on the green body, drying, and then soaking with cover glaze; and finally, sintering at the temperature of 1250-1270 DEG C in a reducing atmosphere. Through the synergistic effect of the sepiolite and other components, the cover glaze has high surface tension, forms a microcrack network during drying, generates controllable glaze shrinkage during firing, forms a three-dimensional chap texture with crack width of 1-5mm and strong curled and raised crack edges, and meanwhile, the ground glaze completely covers a green body, so that the product practicability is ensured.

The invention belongs to the technical field of ceramics, and particularly relates to a three-dimensional effect glaze, a three-dimensional effect ceramic tile and a preparation method thereof. The three-dimensional effect glaze is composed of honeycomb ground glaze and honeycomb effect glaze; the honeycomb ground glaze comprises the following mineral components in percentage by mass: 20%-30% of quartz, 5%-10% of kaolin, 12%-18% of albite, 7%-15% of calcite, 2%-7% of wollastonite, 12%-17% of calcined talc, 15%-25% of calcined zinc oxide, 2%-6% of titanium dioxide, 2%-4% of glass powder, 1%-3% of strontium carbonate and 1%-5% of dolomite. The glaze with the honeycomb effect comprises the following mineral components in percentage by mass: 5%-15% of quartz, 5%-10% of kaolin, 40%-55% of albite, 2%-6% of barium ice feldspar, 2%-10% of calcite, 7%-15% of calcined talc, 1%-4% of calcined zinc oxide, 7%-15% of red mud and 3%-5% of coal gangue. The novel effect glaze is developed, the glaze surface is flat and smooth, meanwhile, the ground glaze is pushed to the surface through the gas phase disturbance effect, and the effect glaze sinks and wraps the ground glaze in a three-dimensional honeycomb shape.

The invention relates to the technical field of agricultural fertilizers, in particular to an organic-inorganic composite silicon-calcium-magnesium fertilizer and a preparation method and application of the organic-inorganic composite silicon-calcium-magnesium fertilizer. The high-temperature activated silicon-calcium-magnesium mineral powder is composed of calcined wollastonite powder, calcined serpentine powder, dolomite powder and zeolite powder; 2%-5% of an organosilane modifier, wherein the organosilane modifier is composed of gamma-aminopropyl triethoxy silane and gamma-glycidyl ether oxypropyl trimethoxy silane, and the organic silane modifier is composed of gamma-aminopropyl triethoxy silane and gamma-glycidyl ether oxypropyl trimethoxy silane; 18%-35% of a functional organic matter complex, wherein the functional organic matter complex is composed of mineral source sodium humate, bioactive small peptide, sodium alginate and polyglutamic acid; and 3%-8% of auxiliary functional components, so that the solubility and the bioavailability of silicon, calcium and magnesium elements in minerals are remarkably improved.

The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking, and belongs to the technical field of refractory materials. The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking. The tundish magnesium-calcium dry material is prepared from the following raw materials in percentage by mass: 44-62.5% of magnesia aggregate, 22.5-24% of dolomite aggregate, 11-28% of magnesia fine powder and 3-5% of a binding agent, the binding agent is silica sol modified by a phosphate esterification aluminic acid ester coupling agent. The preparation method comprises the following specific steps: putting magnesia fine powder, a binding agent, magnesia aggregate and dolomite aggregate into a V-shaped mixing mill, uniformly stirring for 5 minutes, putting the stirred mixture into a mold, ramming, vibrating and molding to obtain a molded green body, curing at room temperature for 24 hours, demolding, drying at 200 DEG C for 24 hours, and carrying out heat treatment in an air atmosphere to obtain a dry material sample. According to the invention, the binding agent with good compatibility with a matrix is prepared by improving the binding agent, so that the binding agent can play a reinforcing role.

The invention discloses a moisture-proof and heat-insulating refractory material and a preparation method thereof, and relates to the technical field of refractory materials, and the moisture-proof and heat-insulating refractory material comprises dolomite, nano silicon dioxide, silica, an anhydrous binder and a moisture-proof agent. The synthesized moisture-proof agent is obtained by modifying asphalt through modified SBS obtained by grafting SBS and a monomer product containing terminal carbon-carbon double bonds, phosphate and a phthalonitrile structure, and has excellent flame retardance, high temperature resistance and waterproofness. And by using the nano silicon dioxide, the heat insulation performance of the refractory material can meet the requirements. The refractory material disclosed by the invention is excellent in refractoriness and moisture resistance and worthy of popularization and application.

The invention relates to a method for preparing an acidified soil conditioner by using dolomite waste residues, which belongs to the technical field of soil conditioners, and specifically comprises the following steps: mixing activated dolomite, mineral source humic acid, a macromolecular adhesive and a fermented organic matter in a ratio of 1: 0.4: 0.001: 0.75; the acidified soil conditioner can be obtained by uniformly mixing the components, and the prepared acidified soil conditioner can remarkably improve the pH of acidified soil and increase soil nutrients so as to improve the crop yield, and can realize resource utilization of dolomite.

The invention discloses a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine. The method comprises an acetic acid solution, a hydrochloric acid solution, a triethanolamine solution, a potassium hydroxide solution and boric acid. The method for measuring the content of calcium fluoride in the dolomite-containing fluorite mine comprises the following steps: S1, reagent proportioning; s2, preparing a calcium standard solution; s3, preparing an EDTA standard titration solution; s4, selecting an instrument; s5, preparing a sample; s6, step analysis; s7, content correction and determination; and S8, calculating a result. The invention belongs to the technical field of calcium fluoride content determination, and particularly relates to a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine, compared with the prior art, the method solves the problem of dolomite dissolution when calcium carbonate is leached by acetic acid, and the content of calcium fluoride in the fluorite mine can be measured by accurately calculating the dissolution amount of dolomite. The measured calcium fluoride content is clearer, more reasonable and more reliable and approaches to a true value, and the process operation is simple and rapid, and is suitable for the requirements in the fields of mine production, assay detection and the like.

The invention discloses an advanced dynamic evaluation method for dolomite sanding characteristics. The advanced dynamic evaluation method comprises the following steps: determining mesoscopic and macroscopic thresholds of dolomite sanding degree grading as rock test static parameters based on an indoor test; extracting kinetic parameters and electrical parameters of the dolomite rock mass as advanced detection dynamic parameters based on geophysical advanced detection of missile-electricity combination; performing principal component analysis and correlation analysis on the rock test static parameters and advanced detection dynamic parameters, and constructing a dolomite sanding dynamic-static parameter quantitative conversion model by using RBFNN (Radial Basis Function Neural Network); training an intelligent grading evaluation model by taking the rock test static parameters as input and the sanding degree grade as output; and mapping the advanced detection dynamic parameters into rock test static parameters through the quantitative conversion model, inputting the mapped rock test static parameters into the intelligent grading evaluation model for verification and iterative optimization, and outputting a sanding degree grading result. Advanced prevention and control of sanding of the dolomite in front of the tunnel construction face can be achieved, and the ground disaster of sand collapse caused by sanding and sand gushing is avoided.

The invention discloses a high-temperature well cementation cement expanding agent and a preparation method thereof, and belongs to the technical field of oil-gas well engineering well cementation materials. The high-temperature well cementation cement expanding agent is prepared from the following raw materials in parts by weight: 30-40 parts of dolomite; 10 to 20 parts of serpentine; 5 to 10 parts of hedenbergite; 5 to 10 parts of scolecite; 25-35 parts of slaked lime powder; 5-10 parts of quartz powder; the high-temperature well cementation cement expanding agent comprises the following chemical components in percentage by weight: more than 13wt.% and less than 23wt.% of MgO, more than 38wt.% and less than 55wt.% of CaO, more than 18wt.% and less than 32wt.% of SiO2, less than 3.5 wt.% of Al2O3 and less than 1wt.% of Fe2O3. The particle sizes of the high-temperature well cementation cement expanding agent are as follows: Dx (10) is less than or equal to 4 microns, Dx (50) is less than or equal to 10 microns, and Dx (90) is less than or equal to 20 microns. The invention also discloses a preparation method of the high-temperature well cementation cement expanding agent. Starting from cement main body minerals, through lattice solid solution, core-shell structure wrapping and other means, an expansion component and the hydration process of cement can achieve a synergistic reaction, and therefore the effective expansion effect is achieved in the cement gelling structure forming process.

The invention discloses a high-aluminum limonite and specularite ore blending and sintering method which comprises the following steps: 1) preparing primary pre-blending powder: pre-blending high-aluminum limonite, specularite concentrate powder, iron oxide scale, limestone powder and anthracite powder to prepare the primary pre-blending powder with the water content of 6.5-7%; (2) preparing a uniformly mixed material: blending the primary pre-blended material powder obtained in the step (1) with high-silicon iron ore powder and hematite and limonite powder to prepare the uniformly mixed material; 3) sintering and burdening: burdening the uniformly mixed material obtained in the step 2) with limestone, dolomite powder, quicklime, solid fuel and return mine, and 4) controlling the components of the sintered ore as follows: 2.3-2.5% of Al2O3, 5.7-6.5% of SiO2, 8-8.5% of FeO and 1.85-2.5% of MgO. According to the invention, while 20-30% of the proportion of the discount ore silk road powder in the total uniformly mixed material is increased, the sintering cost is reduced by 20-42 yuan / ton, the drum strength of the sintered ore is greater than or equal to 78.5%, the return mine rate is less than or equal to 27%, and the RDI + 3.15 mm is greater than or equal to 63%.

The invention relates to the technical field of building ceramics, in particular to waxy antifouling matte glaze and a preparation method and application thereof.The waxy antifouling matte glaze is prepared from, by mass, 7-10 parts of kaolin, 6-15 parts of calcined kaolin, 4-8 parts of quartz, 20-30 parts of potassium feldspar, 5-15 parts of albite, 5-10 parts of wollastonite, 1-5 parts of zinc oxide, 5-10 parts of strontium carbonate, 5-12 parts of barium carbonate and 10-20 parts of crystalline frit; the crystalline frit is prepared from the following raw materials in parts by mass: 25 to 35 parts of kaolin, 3 to 8 parts of calcined aluminum oxide, 20 to 35 parts of calcite, 0.5 to 3 parts of dolomite, 5 to 10 parts of zinc oxide, 25 to 35 parts of potassium feldspar, 0.5 to 3 parts of barium carbonate and 1 to 5 parts of anorthite powder. The waxy antifouling matte glaze provided by the invention not only has antifouling performance, but also has high hardness and high wear resistance on the premise of having matte texture and waxy silky hand feeling, so as to overcome the defects in the prior art.

The invention belongs to the technical field of crop planting and soil improvement, and particularly relates to a soil conditioner, application and a method for planting wheat by combining the soil conditioner with soil. The soil conditioner is prepared from dolomite, quick lime and organic fertilizer. The invention further provides application of the soil conditioner in improvement of acidic yellow brown soil in southern Henan province. The invention also provides a method for planting wheat by mixing the chemical fertilizer, the soil conditioner and soil. The method is mainly used for solving the problem of soil acidification in the yellow and brown soil area and solving the problem that growth of wheat is inhibited due to the soil acidification problem, and has important significance on guaranteeing the quality of cultivated land and food safety in the southern Henan area.

The invention belongs to the technical field of rock wool thermal insulation materials, and particularly relates to a high-strength thermal insulation rock wool board and a preparation method thereof. The high-strength thermal insulation rock wool board is prepared from the following raw materials in parts by weight: 65 to 72 parts of basalt, 10 to 15 parts of dolomite, 8 to 12 parts of iron ore, 3 to 8 parts of bauxite, 2 to 5 parts of limestone, 10 to 15 parts of aerogel powder and 4 to 7 parts of binder. The aerogel powder is prepared by the following preparation processes: mixing tetraethoxysilane, ethanol and water, adjusting the pH value to 2.5-4, and stirring under a heating condition to obtain silicon dioxide sol; the preparation method comprises the following steps: dispersing black phosphorene in water to obtain black phosphorene dispersion liquid; and mixing a black phosphorene dispersion liquid with the silicon dioxide sol to form a mixed solution, adjusting the pH value of the mixed solution to 8-10, standing, aging, freeze-drying and grinding to obtain the aerogel powder. The high-strength heat-preservation rock wool board has the advantages of low heat conductivity, low water absorption and excellent mechanical strength.

The invention relates to the technical field of building glazed tiles, in particular to an antibacterial glazed tile and a preparation method thereof.The antibacterial glazed tile comprises a green body layer and an antibacterial glaze layer which are sequentially arranged from bottom to top; wherein the antibacterial glaze layer is obtained by calcining antibacterial glaze; the antibacterial glaze is prepared from the following raw materials: high-temperature antibacterial frit, calcined kaolin, corundum, quartz, dolomite, calcined talc, strontium carbonate, wollastonite, potassium feldspar and albite; the high-temperature antibacterial frit is prepared from the following raw materials: zirconium silicate, a silver antibacterial agent, calcined aluminum oxide, calcined talc, quartz, wollastonite, kaolin, calcium phosphate, potassium feldspar, albite, boric acid and lithium carbonate. According to the antibacterial glazed tile and the preparation method thereof provided by the invention, the formula of the antibacterial glaze is optimized, so that the antistatic property and the corrosion resistance can be improved on the premise of ensuring the antibacterial property of the antibacterial glazed tile.

The invention provides a method for extracting vanadium by negative pressure roasting of dolomite and acid leaching of vanadium slag, and belongs to the technical field of resource recovery, the method comprises the following steps: crushing the vanadium slag, the dolomite and the vanadium slag to a certain particle size, mixing according to a certain proportion, and pelletizing; carrying out negative pressure roasting on the pellets by adopting a closed furnace to obtain roasted clinker and carbon dioxide; leaching and trapping the carbon dioxide through a calcium-containing aqueous solution to prepare light calcium carbonate; the roasted clinker is leached through sulfuric acid, and a vanadium-containing solution and leaching residues are obtained after leaching; extracting the vanadium-containing solution to prepare vanadyl sulfate; and carrying out magnetic separation on the leaching residues to obtain magnetite, and taking residual tailings as a cement raw material. According to negative pressure roasting, the normal pressure calcification roasting temperature is reduced, the cost is greatly saved, meanwhile, an iron component in the vanadium slag is converted into magnetic ferroferric oxide, the utilization rate of iron is increased, in addition, carbon dioxide enrichment is achieved through the closed furnace, a light calcium carbonate product is prepared through trapping and mineralization, and full-quantization high-value utilization of the vanadium slag component is achieved.

The invention discloses an organic-inorganic composite acid soil conditioner with synergism of nitrogen element synergism and soil expansion and application, and belongs to the technical field of soil conditioners. The modifier prepared by the invention is prepared from an acid neutralizer, a structure modifier, a capacity expansion synergist and a nitrogen synergist and is prepared from the following components in parts by weight: 18 to 22 parts of dolomite powder, 6 to 10 parts of lime powder, 20 to 24 parts of oyster shell powder, 8 to 12 parts of humic acid, 4 to 8 parts of sargassum, 1 to 3 parts of sodium alginate, 7 to 11 parts of charcoal, 5 to 9 parts of sepiolite powder, 3 to 7 parts of bentonite, 6 to 10 parts of poly gamma-calcium glutamate and 3 to 7 parts of chitosan. The soil conditioner can regulate and control the soil acidity, buffer the soil capacity, improve the soil structure and balance soil nutrients, solves the problems of high re-acidification rate, soil hardening and nutrient imbalance of a traditional lime conditioner, and is suitable for pHlt; and 6.5, repairing the acid soil.

The invention discloses a production method for optimizing smelting of low-silicon molten iron, and belongs to the technical field of steel smelting. The method comprises the following steps: 1) optimizing a raw material ratio: selecting high-quality iron ore, coke and a flux as main raw materials; the flux is a mixture of limestone and dolomite in a mass ratio of (0.9-1.1): (0.9-1.1); 2) smelting process parameter optimization: controlling the air volume, air pressure and air temperature of the blast furnace in the blast furnace smelting process; meanwhile, the coke load is reasonably adjusted and is kept between 2.5 and 3.0; when the low-silicon molten iron is smelted, converter slag charge is added in three batches; (3) improving an in-furnace operation technology; (4) molten iron pretreatment; and 5) quality detection and feedback control. The invention aims to realize stable production of the low-silicon molten iron, reduce the production cost and improve the smelting efficiency and the molten iron quality.

The invention discloses a method for recovering valuable elements in phosphorite step by step through gradient acid leaching, which comprises the following steps: firstly, mixing high-magnesium phosphorite and high-silicon phosphorite in proportion for ore blending, and carrying out crushing, grading and ball milling until the particle size is less than or equal to 200 meshes; then, adopting a gradient acid leaching process: (1) leaching with low-concentration inorganic acid (1-3wt%), and preferentially and selectively removing dolomite and calcite to obtain phosphate concentrate and leachate rich in calcium and magnesium; (2) leaching the phosphate concentrate by using medium-concentration inorganic acid (5-8wt%), and dissolving the phosphate concentrate to obtain a phosphate concentrate leachate and residues mainly containing iron, aluminum and silicon; and (3) leaching the residues by using high-concentration inorganic acid (30-40wt%) to obtain silicon-rich residues and a leaching solution rich in iron and aluminum. (4) neutralizing and carbonizing the calcium-magnesium leaching solution, and respectively precipitating and recovering magnesium hydroxide and calcium carbonate; (5) carrying out fractional precipitation on the phosphate concentrate leachate to obtain rare earth enrichment and calcium hydrogen phosphate; (6) carrying out alkali dissolution and carbonization reaction on the silicon-rich slag to prepare high-purity white carbon black; and (7) carrying out iron powder reduction, neutralization aluminum removal and oxidation iron precipitation on the iron and aluminum lixivium to prepare the battery-grade iron phosphate. The method is simple and convenient to operate, energy-saving and environment-friendly, various valuable elements in the phosphorite are efficiently recycled, and the economic added value of phosphorite resources is increased.

The present invention discloses a high-quality ceramic glaze for sanitary ceramics and a preparation method thereof. The ceramic glaze comprises, by weight, 15-23% potassium feldspar, 4-10% sodium feldspar, 28-34% quartz, 1-4% aluminum oxide, 8-14% calcite, 4-8% dolomite, 4-8% burned kaolin, 6-8% wollastonite, 2-3% zinc oxide, 7-10% zirconium silicate, and 2-3% boron frit. While the present invention reduces the use of zirconium silicate in the formula, by precisely adjusting the silicon-aluminum ratio and introducing quartz particles of a specific composition, the glaze surface hardness is comparable to that of conventional formulas. Even while reducing the use of potentially radioactive ingredients, the product still provides good scratch resistance and a long service life, thereby maintaining normal use and aesthetics. By reducing the amount of zirconium silicate used, the glaze formula reduces production costs by approximately 20%, achieving energy conservation and consumption reduction.

The invention relates to a low-temperature foaming inorganic filling material as well as a preparation method and application thereof, and belongs to the field of grouting filling reinforcement. Aiming at the problems of low foaming efficiency and the like of an existing inorganic system at low temperature, cement and sodium silicate are used as main components of a filling material, carbonate is used as a main foaming agent, dolomite is used as an auxiliary foaming agent, and stage release of carbon dioxide is realized through cooperation of organic phosphonic acid and citric acid; the composite foam stabilizing system is constructed by combining nano silicon dioxide and sodium carboxymethyl cellulose. The filling material can be quickly foamed at low temperature, is high in foaming rate, good in stability and excellent in compressive strength, the foaming ratio at 5 DEG C is greater than or equal to 5.4 times, the half-life period is greater than or equal to 35min, and the 7d compressive strength is greater than or equal to 8.4 MPa according to tests, the technical problems that a traditional inorganic grouting material is low in low-temperature foaming efficiency and poor in foam stability are solved, and the filling material is suitable for coal mine underground low-temperature grouting engineering.

The invention belongs to the technical field of geopolymer materials, and particularly provides a method for preparing a geopolymer cementing material based on alkaline solution modified dolomite. The method specifically comprises the following steps: mixing an alkali-activated solution with dolomite to prepare a modified alkali-activated solution; the dolomite is mixed with a geopolymer precursor, the geopolymer cementing material is obtained, and the dolomite accounts for 5%-10% of the mass of the polymer precursor. According to the invention, precipitation of Ca < 2 + > and Mg < 2 + > or generation of Ca (OH) 2 in dolomite is promoted in an alkaline environment, the reaction activity is improved, the material strength is improved while the coagulation time is shortened, and the problems of delayed coagulation and mechanical property reduction caused by traditional direct addition of dolomite are solved.

The invention relates to the technical field of fluorite ore dressing, discloses a method for flotation of fluorite in dolomite type fluorite ore, and aims to solve the co-flotation problem caused by similar surface properties of dolomite and fluorite and the characteristic of complex dissociation of intergrowth by constructing a gradient inhibition system and combining stage selective regrinding and flotation closed-loop processes. Linkage control of dissociation and suppression is realized; the core of the method is to dynamically adjust the reagent ratio and dosage through multi-section separation, optimize the mineral dissociation degree in cooperation with double-node regrinding, and strengthen targeted inhibition of dolomite and accurate collection of fluorite. According to the method, fluorite and dolomite can be efficiently separated, high-grade fluorite concentrate is stably produced, the method is suitable for dolomite type fluorite ores of different structures, the resource recovery efficiency is remarkably improved, and technical support is provided for resource utilization of the complex fluorite ores.

The invention belongs to the technical field of tunnel surrounding rock assessment, and provides an intelligent assessment method and system for the surrounding rock category of a sanded dolomite tunnel, and the method comprises the steps: judging whether the characteristics of a sanded strip are remarkably and suddenly increased or not by comparing the parameters of the sanded strip of a preorder region and the parameters of the sanded strip of a subsequent region in the tunnel; if yes, verifying the suitability of the characteristic capture of the sanding strips in the preorder area and the subsequent area of the initial evaluation unit, and judging whether the quantitative classification requirements of the sanding characteristics of the preorder area and the subsequent area can be met at the same time or not; if not, screening a general evaluation unit capable of giving consideration to the characteristics of the front and back sequence regions; if the general evaluation unit does not exist, determining an exclusive evaluation unit of the subsequent region, positioning a significant sudden increase starting point of the sanding strip characteristics, performing scale mutation analysis in combination with the exclusive evaluation unit and the initial evaluation unit, and determining a switching transition zone of the initial evaluation unit and the exclusive evaluation unit; and the adaptability and continuity of evaluation of different regions are ensured.

The invention provides a method for producing alkaline magnesian pellets and the alkaline magnesian pellets. The method comprises the steps that S1, limonite powder and dolomite powder are continuously blended according to a preset proportion to form a pre-blended mixture, and the pre-blended mixture is continuously fed into a dry method vertical roller mill; s2, extruding, shearing and grinding the pre-prepared mixture in a dry-method vertical roller mill, and meanwhile, introducing high-temperature separation flue gas to perform winnowing on the ground material to obtain single mixed powder; s3, directly adding water into the single mixed powder, mixing and pelletizing to obtain green pellets; and S4, the green pellets are fed into a chain grate-rotary kiln system to be roasted, and the alkaline magnesian pellets are obtained. The problems that in the production process of producing the alkaline magnesium pellets from the limonite powder and the dolomite powder, the number of raw material processing procedures is large, energy consumption is high, and mixing is insufficient are effectively solved. And the effects of improving the pellet quality, saving energy, reducing consumption and reducing carbon emission are achieved.

The utility model relates to the technical field of calcining furnaces, in particular to a microwave heating high-temperature circulating flash calcining furnace, which comprises a cylindrical furnace body, a strong wave-transparent layer arranged on the inner wall of the cylindrical furnace body, a fire-resistant furnace lining arranged on the inner wall of the strong wave-transparent layer, a microwave generator arranged on the periphery of the cylindrical furnace body, and a preheater connected with the upper end of the cylindrical furnace body, a dust removal assembly is arranged above the preheater, and a discharging machine is arranged at the lower end of the cylindrical furnace body and connected with a cooling machine. According to the utility model, the microwave generator is used for calcining magnesite, dolomite, limestone, kaolin, clay, illite and the like, can be used for calcining in a reduction furnace or a vacuum reduction furnace, and is also suitable for high-temperature and ultrahigh-temperature flash sintering high-grade refractory materials; the device has the advantages of low investment cost, small occupied area, high resource utilization rate and the like.

The utility model discloses a control system for a wet-method pulverizing production line, which relates to the technical field of mechanical pulverizing equipment and comprises an industrial personal computer and an industrial router connected with the industrial personal computer through Ethernet communication. The jaw crusher control component, the cone crusher control component, the transfer stock bin control component, the double-roller flour mill control component, the vibrating screen control component, the separating tower control component, the magnetic separator control component, the second dewatering screen control component and the first conveying belt control component are connected with the industrial router through Ethernet communication. A first conveying belt control component, a second conveying belt control component, a third conveying belt control component, a fourth conveying belt control component, a first conveying pump control component and a water spraying device control component; the device has the characteristics that the device is convenient to operate and control, one-key start, one-key stop and one-key sudden stop of the whole line can be realized, and the operation data of the whole line can be automatically stored; the device is matched with a wet-method pulverizing production line and is suitable for preparing mineral powder such as quartz sand powder, dolomite powder and calcium carbonate powder.

The application discloses a method and system for predicting water inrush of sandified dolomite stratum under water-rich conditions, comprising: obtaining first detection data and second detection data; extracting first cross-section data and second cross-section data; the cross-section data is position data of a cross-section with discontinuity; comparing the first cross-section data and the second cross-section data, and taking a region with a difference greater than a preset value between the first cross-section data and the second cross-section data as a target drilling region; obtaining third cross-section data; forming cross-section fitting data of the target cross-section; and predicting construction water inrush risk. The method and system for predicting water inrush of sandified dolomite stratum under water-rich conditions effectively improve the advanced detection capability of sandified dolomite tunnel construction, improve construction safety and reduce construction risk by data fusion on the detection data in front of a tunnel face and accurate data acquisition and completion in combination with the advanced drilling technology.

The invention discloses an algorithm-based detritus dolomite sedimentary microfacies identification method, and relates to the technical field of rock sedimentary microfacies identification, and the method comprises the following steps: collecting a detritus dolomite sample, and carrying out analysis to obtain the structure and characteristics of the detritus dolomite sample; extracting features in the structure and the characteristics; selecting a machine learning algorithm; using known detritus dolomite sedimentary microfacies data as a training set, and training a machine learning algorithm to obtain a microfacies recognition model; and then the microfacies identification model is applied to actual detritus dolomite sedimentary microfacies identification, the method can obviously reduce the labor force required by detritus dolomite sedimentary microfacies identification, so that the laboratory analysis is time-saving and labor-saving, and when the microfacies identification model is used for identifying detritus dolomite, the identification result is more objective, effective, accurate and reliable; and the microscopic characteristics or microstructure of the rock stratum can also be captured.

The invention discloses a modified rock wool fiber base material fireproof thermal insulation composite board and a preparation method thereof, and belongs to the field of rock wool boards. The modified rock wool fiber base material fireproof thermal insulation composite board comprises the following components in parts by weight: 60-70 parts of basalt, 3-7 parts of diabase, 15-20 parts of blast furnace slag, 3-5 parts of dolomite, 0.5-1.5 parts of borax, 1-3 parts of silica fume, 8-12 parts of a modified emulsion and 4-7 parts of a binder. Through the chemical design of the modified emulsion and the collaborative optimization of the components of the composite board, the technical problems of low strength, high brittleness and high moisture absorption of a traditional rock wool composite board are solved, the comprehensive improvement of mechanical properties, water resistance and heat insulation performance is realized, and a high-performance integrated solution is provided for a building fireproof heat insulation material.