19 results about "Polyhalite" patented technology

The present invention provides a method for deploying exploration well positions for polyhalite, which mainly includes the following steps: 1) Using physical cores to clarify the logging response characteristics of the main lithologies; 2) Based on the obvious response characteristics, using the radioactive difference to measure the potassium content, determining the correlation between the potassium content and the total radioactivity, and constructing a mathematical model; 3) Using the preferably selected logging curves sensitive to polyhalite to construct a polyhalite characterization curve, taking the curve as the inversion target curve, using the frequency division attribute inversion method, and simultaneously adding the wave impedance inversion result as a constraint to carry out polyhalite prediction to obtain the distribution range of polyhalite; 4) Selecting polyhalite drilling well positions within the distribution range of polyhalite in step 3) above. The present invention can effectively improve the well position selection efficiency, improve the drilling success rate, achieve high-economic exploration, and at the same time can effectively eliminate the interference of other potassium-containing minerals such as mudstone, greatly improving the accuracy of inversion prediction.

The invention provides a process for the preparation of polyhalite granules comprising the steps of providing an aqueous ammonium nitrate (AN) solution; heating the solution to produce a hot solution; adding the hot solution to polyhalite; and allowing the mixture to cool during a granulation process. The invention further provides a process for the preparation of polyhalite granules where polyhalite is granulated with ammonium nitrate to form potassium nitrate, calcium ammonium nitrate, ammonium nitrate and / or magnesium nitrate and ammonium sulphate and a polyhalite granule comprising polyhalite and potassium ammonium nitrate.

The invention discloses a method for rapidly preparing polyhalite, which comprises the following steps: carrying out hydrothermal phase inversion reaction on a mixed system containing a K < + > source, a Mg < 2 + > source, a Ca < 2 + > source, a SO4 < 2-> source and water, and then carrying out cooling treatment to prepare the polyhalite, wherein in the mixed system, the content of K < + > is 1.31 wt% to 10.10 wt%, the content of Mg < 2 + > is 1.31 wt% to 3.16 wt%, the content of Ca < 2 + > is 0.96 wt% to 12.5 wt%, the content of SO4 < 2-> is 9.09 wt% to 54.86 wt%, and the content of H2O is 87.33 wt% to 19.38 wt%. According to the method provided by the invention, phase inversion and phase chemical equilibrium of polyhalite are realized under a hydrothermal condition, and the polyhalite can be rapidly prepared through a temperature changing process.

The present invention relates to a method for producing a fertilizer granule comprising a mixture of polyhalite and melt urea, wherein said method comprises adding polyhalite to a granulator, providing a source of melt urea, transferring the melt urea to the granulator to form a mixture, and granulating the mixture to yield granules.

According to some embodiments, there is provided herein a composition comprising Polyhalite and manure.

The present invention provides a particulate material comprising a polyhalite composition; 0.2% (w / w) to 2.0% (w / w) of an organic binder and 0.5% (w / w) to 6.0% (w / w) of an inorganic binder, where the ratio of inorganic binder to organic binder is greater than 1: 1, as well as a method of making the material. The invention further provides a particle comprising a polyhalite or a combination of a polyhalite and a potassium salt having a compressive strength of 2.0 kgf to 6.0 kgf and a final moisture content of 0.25 to 0.50% w / w.

The invention provides a method for preparing polyhalite particles. The method comprises the following steps: providing an ammonium nitrate (AN) aqueous solution; heating the solution to produce a hot solution; adding the hot solution into polyhalite; and allowing the mixture to cool during the granulation process. The invention also provides a method of making polyhalite particles wherein the polyhalite is granulated with ammonium nitrate to form potassium nitrate, calcium ammonium nitrate, ammonium nitrate and / or magnesium nitrate and ammonium sulfate, as well as polyhalite particles comprising polyhalite and potassium ammonium nitrate.

A method of manufacturing a fertilizer comprising biomass, consists in that the biomass comprising, in dry matter, simple and complex proteins in an amount from 8 to 30% by weight and phosphorus compounds in an amount from 1 to 3% by weight P2O5, is mixed with at least one carbonaceous raw material selected from the group comprising lignite, bark, sawdust, humus, compost, peat and straw in an amount of 5 to 20% by weight in relation to the biomass, is ground to a particle size of less than 5 mm to produce a pulp with a dry matter content from 10 to 70%, then the resulting pulp is mixed with at least one evaporite mineral selected from the group comprising polyhalite, calcite, dolomite, gypsum, anhydrite, carnallite, sylvite, barite, after which the whole is dehydrated to a dry matter content from 40 to 85%, then mixed with alkaline raw materials in an amount sufficient to control the temperature of the mixture in the range from 60 to 140ºC and obtain a moisture content of less than 30%, preferably 10 to 15%, and then the product obtained is granulated to obtain granules with sizes from 1 to 5 mm, and alkaline raw materials forming inorganic coatings are applied to the surface of the granules, after which a substance forming an outer coating is sprayed.

Provided herein is a liquid solution for recovering petroleum from a carbonate reservoir, comprising a solid chemical composition comprising: polyhalite in the range of 70 to 99.5% by weight; NaCl in the range of 5 to 30% by weight; SiO2 in the range of 0.1 to 5% by weight; and injection water selected from the group consisting of seawater, diluted seawater, desalinated seawater, produced water, aquifer water, river water, surface water, fresh water, distilled water, or a combination thereof; wherein the solid chemical composition is dissolved in the injection water in an amount of 1-10 grams of the solid chemical composition per liter of the injection water.

A method for forming a pelletised evaporite mineral product (e.g., polyhalite, sylvite, carnallite, kainite, gypsum, kieserite, langbeinite dolomite, calcite, magnesite); the method comprising: processing an evaporite mineral powder to form a quantity of pellets; a first drying step comprising drying the pellets using a first dryer (e.g., rotary dryer, fluidised bed, Roto Louvre) configured to simultaneously agitate and dry the pellets; separating the pellets into an in-size fraction and at least one of an oversized and undersized fraction; and a second drying step comprising drying the in-size fraction of the pellets using a second dryer (e.g., belt dryer, electromagnetic dryer) to form the pelletised evaporite mineral product. The method may comprise one or more of: passing the in-size fraction through a polishing screen, cooling, and coating the in-size fraction to form the pelletised evaporite mineral product. Also disclosed is a production facility, comprising processing apparatus 202 configured to process an evaporite mineral powder to form pellets, a first dryer 204 configured to simultaneously agitate and dry pellets, a separator 206 configured to separate the pellets into in-size, over- and under-sized fractions, and a second dryer 208 (308, Fig.3) configured to dry in-size fraction of pellets to provide the pelletised product.

The present invention provides a granular material comprising a polyhalite composition; 0.2% (w / w) to 2.0% (w / w) organic binder and 0.5% (w / w) to 6.0% (w / w) inorganic binder, wherein the ratio of inorganic binder to organic binder is greater than 1:1, as well as a process for preparing the material. The present invention further provides granules comprising polyhalite or polyhalite in combination with potassium salt(s), having a crushing strength of 2.0 kgf to 6.0 kgf and a final moisture content of 0.25 to 0.50% w / w.

The invention belongs to the technical field of salt chemical industry, and particularly relates to a leaching mining method for potassium in polyhalite. A sodium chloride solution and pure water are used as leaching agents, efficient extraction of potassium resources is achieved through three-stage alternate leaching of induction, strengthening and stabilization, the sodium chloride solution is adopted at low pressure in the induction stage, the solubility of CaSO4 is reduced through the salting-out effect, deposition is inhibited, meanwhile, Na < + > is preferentially combined with Mg < 2 + > and SO4 < 2-> released by polyhalite to generate anhydrous natroedite, and the sodium chloride solution and the sodium chloride solution are separated out; the polyhalite is pushed to be dissolved, balanced and positively moved to realize rapid initial dissolution of potassium; in the strengthening stage, pure water is switched and pressure is increased in a gradient mode, permeation is enhanced, the leaching area is enlarged, the thermodynamic driving force of polyhalite dissolution is improved, and potassium dissolution is accelerated by means of the effects of low viscosity, high diffusivity and high pressure of the pure water; in the stable stage, high pressure is maintained, a low-concentration sodium chloride solution is adopted, calcium ion deposition and potassium ion reverse adsorption are inhibited, deep recovery of residual potassium is achieved, and therefore the leaching rate of potassium and the comprehensive benefits of the process are improved.

The invention relates to a fertiliser composition including at least one polyhalite analogous triple sulphate salt. The invention extends to the use of these analogues in fertiliser compositions in agriculture to increase plant growth, in soil remediation and / or reclamation and / or recovery of contaminated land.

According to some embodiments, there is provided herein a composition comprising Polyhalite and manure.

In accordance with some embodiments, provided herein are compositions comprising polyhalite and manure.

The present invention provides a logging quantitative evaluation method for potassium content in halite-type polyhalite. By using the three sensitive parameters of low density, high potassium, and low thorium of halite-type polyhalite, a logging identification chart for halite-type polyhalite is established, and a characteristic identification curve of potassium index is constructed. The potassium index threshold values of different lithologies and halite-type polyhalite are determined through calibration with core data. At the same time, the influence of potassium content of clay minerals in halite-type polyhalite is eliminated by energy spectrum radioactivity difference correction, and a logging quantitative calculation formula for potassium content based on radioactivity difference analysis is obtained. The present invention has a reasonable concept and a simple process, can effectively solve the problem of quantitative calculation of potassium content in halite-type polyhalite, has high calculation accuracy, and the calculation result has a high degree of coincidence with the experimental determination of potassium content.

A liquid solution for the recovery of oil from carbonate reservoirs, the solution including a solid chemical composition including Polyhalite in a weight range of 70 to 94.9%, NaCl in a weight range of 5 to 29.9%, and SiO2 in a weight range of 0.1 to 5%, the solid chemical composition being dissolved in water, which may include sea water, diluted sea water, desalinated seawater, produced water, aquifer water, river water, surface water, fresh water, or distilled water, where the solution is prepared by dissolving 1-10 grams of the solid chemical composition per liter of water.

There is provided a fish feed composition comprising Polyhalite in a concentration between 0.5%-5% w / w.

Disclosed is a fertilizer containing a mixture containing calcium nitrate (Ca(NO3)2) and urea sulfate (H2SO4·CO(NH2)2), and optionally polyhalite. Methods of making and using the fertilizer are also disclosed.