104 results about "Dolostone" patented technology

The invention discloses a stuff mining method when the ardealite adhesive is solidified and relative pulp production. The stuff mining method comprises that preparing mine house, stuffing preparation, preparing pulp, and stuffing. The pulp preparation comprises that using ardealite, coal powder / dolostone and cement as the stuff material to be added into water and mixed into stuff pulp; the stuff pulp via the stuff drill hole or the pump station is input to the upper outer flat channel of the mining field via the stuff tube, to be fed into the mining field. The inventive stuff mining method can confirm the yield and stability of mine, to improve the recycle rate of mineral and protect the environment.

The invention discloses a method for preparing calcium sulphate crystal whiskers by dolostone, which takes the dolostone as a raw material, and prepares the calcium sulphate crystal whiskers through the steps of mineral acidification, microwave seed crystal synthesis and hydro-thermal crystal whisker synthesis, etc. The calcium sulphate crystal whiskers are a nemaline calcium sulphate crystal which has the slenderness ratio of 10 to 10000, the strength close to the theoretical strength of valence links between material atoms, and ultra-high tensile strength and elastic modulus; compared with other crystal whiskers, the calcium sulphate crystal whiskers further have the advantages of high temperature resistance, strong chemical corrosion resistance, good toughness, easier processing of surface modification, strong affinity with polymers and low toxicity, etc., and have wide application prospect in the fields of reinforced plastic, rubber, sizing agent, friction material and environmental engineering, etc. The method for preparing the calcium sulphate crystal whiskers disclosed by the invention uses the natural mineral of dolostone which has wide source and low price as the main raw material, has simple preparing process flow, less equipment investment and easier popularization.

The invention provides a low-density cement slurry. The water-solid ratio of the cement slurry is (58-65):100, and the cement slurry comprises the following solid components in parts by weight: 112-118 parts of cement, 35-45 parts of lightening admixture microbeads and 5-12 parts of stabilizer micro-silicon, wherein the cement comprises 100 parts of cement first component with the average particle size of 12-14 mu m and 12-18 parts of cement second component with the average particle size of 6-7 mu m; calculated by the volume of the cement slurry, each liter of the cement slurry comprises 0.1-0.25g of fiber; and the density of the cement slurry is 1.29-1.31g / cm<3>. By applying a cement slurry system disclosed by the invention, cementing quality of a formation, which is easy to drop out due to the development of cracks of limestone and dolostone can be greatly improved.

The invention relates to an extraction method of nonferrous metal magnesium, in which dolostone(MgCO3, CaCO3), brucite (Mg(OH)2) and giobertite (MgOCO3) are chosen as raw material, metal aluminum as reducer. At first, said three raw materials are calcined respectively to produce magnesia. Magnesia reacts with reducer aluminum with chemical reaction formula: 21MgO+12CaO+14Al=12CaO.7Al2O3+21Mg, in which weight of each raw material accords to reaction formula. Raw materials are mixed, forced to ball and then added into reduction jar. Reduction jar is added into reduction furnace. Advantages of the invention: saving 20-50% of energy cost and increasing service life of reduction jar; reducing periodic time of reduction from 12h to 7-8h so as to increase output of single jar; increasing 30-90% of magnesium production; decreasing racial of raw material and magnesium; furnace slag having multiple use and reducing cost of magnesium manufacture.

The invention discloses a method for preparing superfine calcium oxide from dolostone. The dolostone has very rich reserves in China, and the main composition of the dolostone is dolomite with a chemical formula MgCa(CO3)2. The method comprises the following simple steps: firstly, separation of calcium and magnesium is realized through reaction between dolostone calcined powder and dolostone acidizing fluid; and secondly, an alkaline solution is dripped into a calcium chloride solution obtained after separation of the calcium and the magnesium, and activated superfine calcium oxide powder is obtained after calcination of obtained calcium hydroxide granules. The superfine calcium oxide is widely applied in the fields such as fire retardant, absorbent, filler and so on. The method for preparing the superfine calcium oxide provided by the invention has a simple technological flow, small equipment investment, and low operating cost; the purity of the prepared calcium oxide is over 90 percent, and superfine magnesium hydrate powder with economic value is simultaneously obtained; and the method is an economic and effective method for preparing the superfine calcium oxide.

The invention discloses a method for preparing superfine magnesia from dolomites. Dolomites are quite abundantly deposited in China, and generic chemical formula of main components of the dolomites is MgCa(CO3)2. The method comprises two simple steps that: firstly, ground dolomites are calcinated at a high temperature to obtain dolomite calcinated powder; and secondly, the dolomite calcinated powder is subjected to water treatment, calcium-magnesium separation and secondary burning to obtain superfine magnesia powder with activity. The nano magnesia has wide application prospect in fields such as neutralizers, fire retardants, adsorbents and fillers, etc. The method for preparing the superfine magnesia provided by the invention has the advantages of simple technological process, less equipment investment and low operational cost, capability of preparing magnesia with a purity of more than 92 percent as well as producing industrial by-products of calcium chloride with economic value, so that the method is worthy of promotion and application.

The invention relates to iron ore tailing mineral fertilizer, which comprises the following components in percentage by weight: 40 to 50 percent of iron ore tailing powder of which the granules are less than or equal to 200 meshes, 26 to 28 percent of phosphorus-containing aleuvite powder of which the granules are less than or equal to 200 meshes, 16 to 19 percent of potassium-enriched shale powder of which the granules are less than or equal to 200 meshes, 5 to 8 percent of dolomite powder of which the granules are less than or equal to 200 meshes, 1 to 2 percent of sodium carbonate and 2 to3 percent of tap water. A preparation method of the iron ore tailing mineral fertilizer comprises the following steps of: mixing the components in a stirrer uniformly, adding the sodium carbonate andthe tap water into the uniformly-mixed powder, mixing uniformly, and baking in a rotary furnace; quenching by the tap water immediately; crushing and grinding the quenched product, and sieving with a200-mesh sieve; forming particulate matters in a pelletizer, drying by a dryer, cooling and packaging to prepare the iron ore tailing mineral fertilizer. The iron ore tailing mineral fertilizer promotes the increase production of crops, improves the quality of the crops, improves a soil structure and ensures that the crops can be eaten safely.

The invention discloses a carbonatite lithology identification method, and belongs to the technical field of petroleum and gas exploration and development. The carbonatite lithology identification method includes the steps that the Ca element content and Mg element content in a rock debris sample are detected, and the ratio of Ca element content to the Mg element content is calculated according to the formula R=Ca / Mg; when R is larger than 59.4, carbonatite is pure limestone; when R is larger than 10.8 and smaller than or equal to 59.4, the carbonatite is limestone containing dolomite; when R is larger than 4.7 and smaller than or equal to 10.8, the carbonatite is dolomite limestone; when R is larger than 2.6 and smaller than or equal to 4.7, the carbonatite is calcite dolomite; when R is larger than 1.8 and smaller than or equal to 2.6, the carbonatite is dolomite containing calcite; when R is larger than or equal to 1.8, the carbonatite is pure dolomite. The carbonatite lithology identification method is easy to operate, accurate in lithology identification result, capable of correctly guiding deploy of a petroleum and gas horizontal well of a carbonatite reservoir and increasing economic benefits of petroleum and gas exploitation of the carbonatite reservoir.

The invention provides a simulation and evaluation method and system for an under-salt dolomite water-rock reaction. The method comprises analyzing stratum water of a research area; stratum water classification is carried out by using a Sulin method; formulating experimental fluids, preparation of dolomite core sample, dolomite water rock reaction test is performed; the dolomite water-rock reaction is judged to reach chemical equilibrium; the method comprises the following steps: determining the fluid flow rate of the dolomite water rock reaction, carrying out the under-salt dolomite water rock reaction by using the prepared experimental fluid and a dolomite rock core sample, analyzing and calculating the changes of mineral components, corrosion and precipitation, and quantitatively evaluating the influence of the under-salt dolomite formation water on the corrosion and precipitation of the dolomite. According to the method, the quantitative evaluation of the reaction between the dolomite and the corresponding formation water under the geological background of the subsalt dolomite reservoir can be realized; the specific influence of stratum water attributes in the dolomite water-rock reaction process can be analyzed, control factors beneficial to formation and storage of under-salt dolomite pores are defined, and an analysis basis is provided for large-scale and efficient under-salt dolomite reservoir distribution and prediction.

The invention provides a quantitative evaluation method and device for solid asphalt of a dense dolomite reservoir stratum. The method comprises the steps that XRD data of reservoir stratum mineral composition are detected, a target stratum is determined, and the shale content in the target stratum is lower than 2%; dolomite, calcite, solid asphalt and quartz are used as matrixes, formation waterand natural gas are used as pores, and a logging response equation of a multi-mineral inversion volume model is established; and according to the logging response equation, an undisturbed stratum resistivity curve, the flushing zone resistivity logging curve, the compensated neutron logging curve, the density logging curve and the compensated sonic logging curve of the multi-mineral inversion volume model, an objective function and constraint conditions are established, and the longitudinal content distribution of the single-well solid asphalt is obtained. The invention further provides a quantitative evaluation device for the solid asphalt of the deep and ultra-deep compact dolomite reservoir stratum. By means of the evaluation method and device, accurate quantitative evaluation of the solid asphalt of the reservoir stratum can be achieved.

The invention discloses a method for quantitatively analyzing an ultra-deep gypsum salt rock and dolomite coupling mechanism. The method comprises the following steps of: (1) respectively acquiring geological background data, classic field geological outcrop profile measurement data, drilling and logging data and seismic data by taking a Sichuan basin carbonate rock reservoir as an object; (2) according to the data obtained in the step (1), determining the basic geological characteristics of dolomite by using sedimentology, petroleum geology theories and various geochemical test analysis, anddetermining the types of dolomite and petrology and distribution rules of various dolomites; and (3) according to the petrology and distribution rule of various dolomites, analyzing the form and formation mechanism of various dolomites and the quantitative relationship between the dolomites and gypsum salt rock, and finally determining the coupling relationship. By judging the source, the seepagedirection, the path and the like of dolomitic fluid, the coupling relation between the dolomitic fluid source and quantification of the bed series and gypsum salt rock is defined, and the method has important guiding significance for oil and gas exploration.

The invention relates to a soil conditioner for a mineral raw material. The soil conditioner is prepared from the following raw materials in parts by weight: 80-100 parts of livestock wastes, 30-50 parts of limestone, 30-50 parts of peat, 30-50 parts of gypsum, 20-40 parts of dolostone, 20-40 parts of bentonite, 30-50 parts of zeolite, 20-40 parts of straw, 22-40 parts of celestite, 20-40 parts of vermiculite, 20-40 parts of diatomaceous earth, 20-40 parts of saponite, 15-30 parts of weathered coal, 10-20 parts of oil shale, 10-20 parts of a multiple species inoculant, 10-20 parts of feldspar, 10-20 parts of calcite, and 15-30 parts of Shizhong Huangzi. The preparation method comprises performing pretreatment, performing turning, performing stirring, performing temperature control, performing fermentation post-treatment, and preparing finished products. The soil conditioner disclosed by the invention is multifunctional, high in content, high in activity and high in absorption, comprehensive in nutrients, rich in various elements of phosphorus, potassium, calcium, ferrum, copper, manganese, boron, sulphur, molybdenum, selenium and the like, and facilitates absorption of plants.

The invention discloses a functional material for removing nitrate nitrogen in water and preparation and application methods thereof. The functional material is obtained by taking sulfur powder and high-activity iron-manganese sulfide powder as main raw materials and taking biomass fibers and a binder as additives, uniformly mixing the raw materials, adding water for molding, and then curing to finish hydration or carbonation. mixing functional material and limestone or dolomite particles and then fillinginto a biological filter, inoculating thiobacillus and culturing until a biological membrane is mature, and treating the wastewater in an upwelling mode according to the hydraulic retention time of 1-5h so that the removal rate of nitrate nitrogen in the wastewater reaches 80% or above.

The invention discloses a heavy metal wastewater treatment method. The heavy metal wastewater treatment method is characterized in that a heavy metal wastewater treatment material is formed through mixing a granular material A with a granular material B according to a certain ratio. A preparation method of the material A comprises the following steps: calcining magnesite at 700-900DEG C, crushing the calcined magnesite, sieving the crushed magnesite by a 200 mesh sieve, adding water, forming 2-10mm particles, and naturally curing the particles to obtain the granular strength composite material formed by magnesium oxide, magnesium carbonate and sodium hydroxide. The material A is a 2-10mm granular material obtained through crushing and screening attapulgite and dolostone. The material A and the material B are mixed according to a mass ratio of 1:1-10:1, and the obtained mixture is used to treat heavy metal-containing wastewater.

The invention provides a calcite dolomite porosity measuring method and an apparatus. The calcite dolomite porosity measuring method comprises following steps: dolomite content of calcite dolomite in an area to be measured is acquired; it is determined that which target content area the acquired dolomite content belongs to; if the acquired dolomite content belongs to a first content area, the porosity of pure dolomite is taken as the porosity of calcite dolomite; if the acquired dolomite content belongs to a second content area, the porosity of pure limestone is taken as the porosity of calcite dolomite; and if the acquired dolomite content belongs to a third content area, the porosity of calcite dolomite is calculated based on the proportion of pure limestone porosity and pure dolomite porosity in the calcite dolomite porosity. According to the calcite dolomite porosity measuring method, the dolomite content of calcite dolomite is used for determining the relationship of calcite dolomite porosity with pure limestone porosity and pure dolomite porosity, the porosity of calcite dolomite is obtained based on the proportion of the pure limestone porosity and the pure dolomite porosity in the calcite dolomite porosity, and accuracy on prediction on calcite dolomite porosity is increased.

The invention discloses an artificial carbonate rock core with developed secondary pores and a preparation method thereof. The method comprises the following steps of according to geological data of oil deposit, analyzing core data and sheet data, and acquiring type data of core minerals in an original target reservoir to determine percentages by volume of dolomite powder and grey rock powder andpercentages by volume of different particle diameters; then mixing the powder with a cementing agent and then pouring into a mold, and wholly compacting, heating and curing, thus acquiring an artificial carbonatite rock core with the primary porosity and permeability of primary pores; placing the artificial carbonatite rock core into a vacuum environment; and then adding acid liquor onto the artificial carbonatite rock core for reacting, monitoring during a reaction process until the secondary porosity and permeability of the needed rock core minerals are reached, and thus acquiring the artificial carbonate rock core with the developed secondary pores. The artificial carbonate rock core and the preparation method thereof provided by the invention achieve the quantitative control of the primary pores and secondary pores of the artificial carbonatite rock core, so as to be applied to the field of oilfield development and research and / or research fields related to the seepage phenomenon in the carbonatite rock medium.

The invention discloses a method for preparing basic magnesium chloride from dolostone, which is characterized in that dolostone is used as the raw material to prepare basic magnesium chloride powder. Each basic magnesium chloride is provided with a plurality of crystal water molecules, when heated, a large amount of fugitive constituents are released at low temperature segment due to the loss of crystal water, while a great deal of heat is absorbed at the high temperature due to the decomposition of basic magnesium chloride. The two decomposition reactions both absorb a huge amount of heat, which covers the low temperature segment and the high temperature segment, thus broadening the temperature range of fire retardation. As the structural layer of the basic magnesium chloride comprises chlorine ions, when applied as a plastic fire retardant, the anti-flaming performance is superior to those of the prior magnesium hydroxide and aluminum hydroxide. By adopting natural mineral dolostone as raw material, the technical process proposed in the invention for preparing basic magnesium chloride fire retardant has the advantages of extensive sources, low price, simple technical process, and less investment in equipment. If the basic magnesium chloride prepared by the invention is used as a fire retardant, the performance price ration will be obviously better than the fire retardants available on the market, such as magnesium hydroxide, hydrotalcite, antimony oxide and aluminum hydroxide.

The invention provides a method and device for identifying the dolomite petrifaction action process, and the method comprises the steps: determining the characteristics of a dolomite crystal and the structure characteristics of the dolomite crystal, the crystal characteristics comprising the crystal size, the crystal form, the crystal structure and the relation between different dolomite and a protolith structure; determining a geochemical analysis project and a geochemical analysis sequence corresponding to the crystal characteristics according to the crystal characteristics so as to generate a geochemical analysis result of the dolomite; and analyzing the dolomite petrifaction process according to the crystal characteristics, the fabric characteristics and the geochemical analysis result. According to the dolomite petrifaction process identification method and device provided by the invention, the dolomite formation period and the dolomite petrifaction process can be reliably known.

The invention provides an ASD spectrum-based carbonate rock lithology identification method and device, and the method comprises the steps: 1, obtaining the spectral data of a carbonate rock sample through an ASD spectrometer; 2, preprocessing the spectral data; 3, extracting a local waveform characteristic value in the spectral data; 4, establishing a carbonate rock lithology identification modelaccording to the local waveform characteristic value in the spectral data; and 5, identifying limestone and cloud rock by using the carbonate rock lithology identification model. According to the method provided by the invention, limestone and dolomite can be effectively distinguished, and compared with a traditional manual identification mode, the method provided by the invention greatly improves the working efficiency and the identification precision, can provide a basis for regional geological exploration, and further has a relatively good application prospect in oil and gas exploration and development and geological application.

The invention discloses a fluorine capturing shaped coal fuel for stone coal and its production method, wherein the fluorine capturing fuel comprises stone coal dust, anthracite duff, fluorine capturing addition agent and clay, wherein the fluorine capturing additive is burned dolomitite or burned limestone or lime, the preparation process includes mixing the cured fluorine capturing additive with anthracite duff, clay and stone coal dust based on proportion and grain diameter range, charging right amount of water, stirring homogeneously artificially or by machine. The invention realizes high fluorine capturing rate, sulfur capturing rate and dust depositing rate.

The invention discloses a milling and blasting combined construction method for a water-rich sandy dolomite stratum tunnel. The milling and blasting combined construction method aims to effectively reduce the risks of collapse, water inrush and mud gushing of an arch part under the condition of broken surrounding rock, control tunnel over-excavation and under-excavation, accelerate the construction progress, shorten the unit cycle construction time and effectively reduce the tunnel construction cost. The milling and blasting combined construction method comprises the following steps that (1) preparation work is performed before construction; (2) core soil of an upper step is excavated through weak blasting, an excavator of the upper step digs slag to a middle step and a lower step, reserved rock mass of the upper step is milled and excavated by adopting a cantilever excavator, and an upper step surrounding primary support is constructed in time after finishing to a designed outline; (3) core soil of the middle step is excavated through weak blasting, an excavator of the middle step digs slag to the lower step, a middle step left side reserved rock body and a middle step right sidereserved rock body are milled and excavated by adopting the cantilever excavator, and a middle step left side primary support and a middle step right side primary support are constructed in time afterfinishing to a design outline; (4) a rock body of the lower step is excavated through weak blasting, and a lower step left side primary support and a lower step right side primary support are constructed; and (5), a rock body of an inverted arch is excavated through weak blasting, and an inverted arch primary support is constructed.

The invention discloses a dolomite reservoir pore anti-compaction effect response judgment and evaluation method and system, and the method comprises the steps: setting a pressure parameter in a simulation mechanical compaction effect; respectively preparing a plunger sample, a microscope slice and a powder sample from the selected dolomite sample; carrying out porosity and permeability analysis on the plunger sample; performing X-ray diffraction analysis on the powder sample; analyzing the microscope slice sample by using a microscope; performing lithology naming on the dolomite sample; carrying out CT scanning on the plunger sample; performing mechanical compaction action simulation on the plunger sample according to the pressure parameters to obtain the porosity and permeability of thedolomite sample under different pressure actions; according to the initial porosity and the initial permeability of the dolomite sample, and the porosity and the permeability under the action of different pressures, obtaining the porosity preserving rate and the permeability preserving rate of the dolomite sample; quantitatively evaluating the anti-compaction effect of dolomite in the mechanical compaction process.

The invention relates to the technical field of energy-saving and environment-friendly building materials, and particularly discloses a concrete doped with dolomitic rock powder, and a preparation method thereof. The concrete is prepared from, by weight, 150-170 parts of cement, 150-170 parts of water, 30-50 parts of fly ash, 60-90 parts of granulated blast furnace slag powder, 30-50 parts of dolomite powder, 700-900 parts of medium sand, 900-1061 parts of broken stone, and 5-10 parts of a polycarboxylic acid water reducer. The concrete prepared by the invention has excellent mixture performance, mechanical property and durability.

The invention provides a phase control type dolomite reservoir earthquake prediction method and device based on deposition parameters. The method comprises the steps: obtaining a lithofacies curve anda deposition energy curve according to research area logging data, rock core observation data and slice observation data; obtaining a deposition parameter curve according to the lithofacies curve andthe deposition energy curve; performing seismic interpretation on the target interval of the research area to obtain a seismic sequence framework of the target interval; carrying out well constraintseismic inversion in the seismic sequence framework by utilizing the deposition parameter curve to obtain phase control type dolomite reservoir distribution. According to the method, the deposition law in geological research is combined with a seismic reservoir prediction technical means, deposition parameters in the deposition law are quantified to serve as input conditions of seismic reservoir prediction to predict the distribution of the phase control type dolomite reservoir, the prediction precision is high, and the geological regularity is high.

The invention provides a method for identifying inherited pores in dolomite. The method comprises the following steps: obtaining a dolomite sample for isotope dating, wherein the dolomite sample for isotope dating simultaneously contains dolomite surrounding rock and an earliest-stage dolomite cementing material loaded in pores and alteration does not occur; delineating dolomite surrounding rock in the dolomite sample for isotope dating and the earliest-stage dolomite cement loaded in the pores, and performing isotope dating to obtain the age of the dolomite surrounding rock and the age of theearliest-stage dolomite cement loaded in the pores; and if the age difference between the dolomite surrounding rock and the dolomite cement loaded in the pores at the earliest stage does not exceed the age difference threshold value, judging that the pores of the dolomite are inherited pores. According to the method, through the objective comparison of ages of surrounding rock dolomite and cementdolomite, a quantitative means is provided for the identification of inherited pores in dolomite.

The invention discloses an increasing production and energy-saving rotary kiln mineralizer of cement, allocating raw material according to mass percent as: 0-5 wt grammite, 5-15 wt sanbornite, 5-45 wt dolostone, 5-15 wt fayalite, 10-40 wt zeolite and 0-10 wt flour. This invention also discloses a preparing method of rotary kiln mineralizer, which comprises by the following steps: bruising separately; mixing dosage; packing; getting end product.

The invention provides a method for judging dolomite with an ordered structure, which comprises the following steps of: (1) drilling more than two cylindrical rock samples from a rock core to be detected, numbering in sequence, cleaning and drying to constant weight; (2) measuring the porosity value of each cylindrical rock sample; (3) sequentially crushing the cylindrical rock samples of which the porosity is measured in the step (2), and testing the total rock mineral content of the crushed rock samples so as to obtain dolomite content data of each rock sample; (4) with the dolomite contentas an abscissa and the porosity value as an ordinate, carrying out correlation relationship plumbing to generate a feature plate; and (5) identifying the dolomite with theordered structure according to the feature plate. According to the discrimination method of the structured ordered dolomite provided by the invention, the structured ordered dolomite can be identified according to the feature plate, the method is simple and quick, and a basis can be provided for searching a high-quality dolomite reservoir stratum and analyzing a deposition environment.

Disclosed is a dry and half- dry desulfurizer, belonging to the art of environmental protection. The invention adopts dolostone as the desulfurizer, the content of the main component calcium carbonate of dolostone being among 40%- 90%, the dolostone being jevigated into powder particle among 100- 600 mesh, which is then added into the dense-phase desulfuration system. The merit is that: (1) the adhesive force of dolostone particle is light, avoiding the problem of shell clinging and caking of desulfurizer; (2) dolostone particle is loose, and has a perfect contact with sulfur dioxide, lightening the stirring of the stirrer, and decreasing the energy consumption; (3) compared with calcium hydrate, the dolostone deletes the agglutination process, and has a broad natural resource and a low cost.