13 results about "Halite" patented technology

A production process for preparing potassium chloride by using underground native carnallite ore comprises the following steps: carrying out primary crushing on the underground native carnallite ore, combining a material obtained by carrying out secondary crushing on an oversize material with an undersize material, conveying the combined material to a decomposer or a crystallizer, adding a beneficiation reagent into decomposed slurry or underflow slurry of the crystallizer, and carrying out roughing, roughing concentrate K1 and roughing tailings T1 are obtained; roughing tailings T1 are conveyed to a thickener, overflow of the thickener is collected and then returns to a decomposing tank for size mixing or flotation size mixing, and underflow of the thickener is subjected to ore grinding operation; materials discharged by the mill are conveyed to middling flotation operation to obtain middling flotation concentrate K2 and flotation tailings T2, the middling flotation concentrate K2 and decomposed slurry of the decomposing tank are subjected to roughing operation together, and roughing concentrate K1 is obtained; and the roughing concentrate K1 is subjected to secondary concentration to obtain crude potassium slurry K4, the crude potassium slurry K4 is filtered to obtain a crude potassium filter cake K5, and the crude potassium filter cake K5 is washed and filtered to obtain a potassium chloride wet material product. The product is high in recovery rate and proper in particle size.

A method of carbon mineralization includes exposing a solution including a plurality of metal salts and a surfactant to carbon dioxide at a pressure in a range from 300 to 700 pounds per square inch (PSI) to form a carbonated solution. The method further includes adding a base to the carbonated solution until the pH is above 10 to form a reaction mixture and reacting the reaction mixture to form mineral precipitates. The carbon dioxide reacts with the metal salts to form the mineral precipitates. The surfactant includes a tertiary amine including one alkyl group and two ethoxylate groups including two or more ethoxy units. The mineral precipitates include calcite, portlandite, brucite and halite. The mineral precipitates are in the form of particles having an average size in a range from 1 to 75 μm.

A composite particle composed of spinel and disordered rock salt domains interspersed therein, made by removing lithium from a disordered rock salt to form a lithium deficient disordered rock salt and heating the lithium deficient disordered rock salt for a time and temperature to form the composite particle.

This invention provides a static cone penetration test (CPPT) system and method for measuring the thickness of carnallite ore layers based on an unmanned surface vessel (USV) with variable buoyancy anchoring. The system includes an USV body, a penetration unit, a main control unit, a data acquisition unit, a multi-parameter formation identification unit, and a fluid counterweight anchoring unit. When the USV body is not performing detection operations, the fluid counterweight anchoring unit increases the weight of the hull. As the static cone penetration probe penetrates the formation, it collects the end resistance at the probe tip and the frictional force on the probe sidewall sleeve, transmitting these data to the multi-parameter formation identification unit. The identification unit identifies the upper and lower interfaces of the carnallite ore layer. The control unit calculates the carnallite ore thickness based on the depth difference between the static cone penetration probes at the upper and lower interfaces of the carnallite ore layer. This invention improves measurement accuracy, resolves the contradiction between miniaturization and large reaction forces, does not damage the original crystallization environment of the salt lake, and enhances the safety of unmanned operations.

The invention provides a production system and method capable of realizing sylvite mineral monomer dissociation, and relates to the technical field of potash fertilizer production, and the production system comprises a sylvite mineral pretreatment system, a decomposition crystallization system and a sylvite dissociation system. Equipment of the sylvite mineral pretreatment system comprises a primary crusher, a screening machine and a secondary crusher. The decomposition crystallization system comprises a decomposition crystallizer, a fine grain dissolving tank and the like. The sylvinite dissociation system comprises a vibrating screen, a fine crusher, a size mixing tank, a medicament reaction stirring tank, a machine pump and the like. Targeted step-by-step dissociation measures are adopted according to the characteristics of the sylvite minerals, the sylvite mineral handling capacity and the potassium recovery rate are improved, the operation cost is reduced, the mining service life is prolonged, equipment abrasion is reduced, the overhaul frequency and energy consumption are reduced, and the flotation environment is improved.

The invention relates to a process for extracting high-purity potassium chloride (KCl) from a carnallite ore (KCl.MgCl2.6H2O) associated with halite (NaCl). The process starts with selective dissolution, prioritising KCl and MgCl2, due to the addition of water at room temperature. Two basification steps follow, involving the addition of potassium hydroxide (KOH) to the solution obtained after dissolving the ore. The first addition makes it possible to extract all of the Mg2+ ions in the form of magnesium hydroxide (Mg(OH)2), an upgraded product. The second addition of KOH seeks to convert all the NaCl into potassium chloride (KCl) and sodium hydroxide (NaOH). This second addition of KOH is carried out in excess to promote the formation of the desired products during the following two crystallisation steps. After the chemical transformations of the mineral solution, a concentration step is undertaken to vaporise the water, thereby promoting the crystallisation of the potassium chloride (KCl). A second concentration is followed by cooling in order to form the solid sodium hydroxide (NaOH). The water vapours generated in the two concentration steps are liquefied by cooling to be recycled. The three solid products resulting from the process are dried to remove moisture, thereby complying with market requirements in terms of purity. The proposed process is characterised by zero-waste management and low water consumption, with more than 90% of the water being recycled initially, as well as recycling of the KOH at the end of the process. In addition, it has low energy requirements, since the dissolution of KOH is exothermic. The KCl production of the process is high due to the regeneration of KCl during the chemical transformations, and the process is characterised by its flexibility with respect to different compositions of the starting ore.

A method of drilling a wellbore into a subterranean geological formation includes drilling the subterranean geological formation to form the wellbore, then circulating an invert emulsion drilling fluid into the wellbore during the drilling to suspend cuttings formed during the drilling. The invert emulsion drilling fluid includes diesel, a primary emulsifier, a secondary emulsifier, a brine including water and a polished brine sludge (PBS) powder including halite in an amount of 55 to 75 wt. %, calcite in an amount of 25 to 40 wt. %, and brucite in an amount of 2 to 6 wt. %, based on the total dry weight of the PBS powder, at least one viscosifier, at least one weighting agent, and at least one alkali. The invert emulsion drilling fluid has an oil-to-water volume ratio of 90:10 to 70:30. The invert emulsion drilling fluid does not include calcium chloride.

The invention relates to the technical field of mining of soluble sylvite in polyhalite, and particularly discloses a polyhalite leaching agent and a preparation method and application thereof.On a maleic anhydride-sodium allysulfonate copolymer molecular chain, carboxyl generated by hydrolysis of maleic anhydride is beneficial to dissolution of K < + > in polyhalite; the sulfonic acid group on the molecular chain of the copolymer provides electrostatic repulsive force, and the whole macromolecular chain provides a strong steric hindrance effect to effectively prevent gypsum from nucleation and growth and finally form thick crystals, and when the thick crystals are stacked, many gaps are left to form a loose and porous filter cake structure, so that the effect of blocking the gypsum is achieved. A porous filter cake structure allows a fresh leaching agent to continuously flow in to dissolve residual polyhalite; meanwhile, dissolved potassium ions can be easily diffused into a main body solution.

The invention concerns a process for extracting high-purity potassium chloride (KCl) from carnallite ore (KCl.MgCl2.6H2O) associated with halite (NaCl). It begins with a selective dissolution, prioritizing KCl and MgCl2, due to the addition of water at room temperature. Two basification steps follow, involving the addition of potassium hydroxide (KOH) to the solution obtained after the dissolution of the ore. The first addition allows the extraction of all Mg2+ ions in the form of magnesium hydroxide (Mg(OH)2), a valuable product. The second addition of KOH aims to convert all the NaCl into potassium chloride (KCl) and sodium hydroxide (NaOH). This second addition of KOH is excessive to promote the formation of the desired products during the two crystallization steps that follow. After the chemical transformations of the mineral solution, a concentration step is undertaken to vaporize the water, thus promoting the crystallization of potassium chloride (KCl). A second concentration is followed by cooling to form solid sodium hydroxide (NaOH). The water vapors generated during the two concentration steps are liquefied by cooling for recycling. The three solid products resulting from the process undergo drying to remove moisture, thus meeting market requirements in terms of purity. The proposed process is distinguished by zero waste management and low water consumption, with more than 90% of water recycled initially, as well as KOH recycling at the end of the process. In addition, it requires little energy, as KOH dissolution is exothermic. The KCl production of this process is high thanks to the regeneration of KCl during chemical transformations, and it is characterized by its flexibility in dealing with different compositions of the starting ore.

The invention discloses a drilling solution mining method and system for a deep novel polyhalite potassic salt ore. The method comprises the steps that a target solution mining layer position of a novel polyhalite potassic salt ore body in a mining area is obtained; a first vertical shaft, a second vertical shaft and a horizontal butt joint well are constructed in the mining area, the first vertical shaft and the second vertical shaft are drilled to the target solution mining layer position, and the horizontal butt joint well is arranged in the target solution mining layer position and communicates with the first vertical shaft and the second vertical shaft; after drilling construction is completed, groove building operation is carried out, and a dissolving cavity in a stable state is obtained; fresh water is injected from the first vertical shaft, the injected fresh water further dissolves the cavity wall of the whole dissolving cavity, and generated potassium-containing brine is pumped out from the second vertical shaft and conveyed to a potassium salt production workshop; and meanwhile, a monitoring system is used for carrying out production monitoring in the water injection and brine extraction process, and injection and production parameters are dynamically adjusted and optimized according to a monitoring result. According to the method, green and efficient mining of the novel deep polyhalite potassic salt ore is achieved.

The utility model relates to the technical field of rock salt production, in particular to a rock salt spiral conveying and metering device which comprises an installation frame and a transfer box, the bottom end of the transfer box is fixedly arranged in the installation frame, a round glass protection plate is installed at the front end of the transfer box, and a rotating mechanism is installed in the center of the transfer box. The rotating mechanism comprises an inner rotating block and an outer rotating block, the center of the inner rotating block is fixedly provided with the center of the driving assembly, the internal situation can be observed through a round glass protection plate installed at the front end of the transferring box, follow-up operation is facilitated, feeding and discharging of the conveying device are facilitated through two sets of connecting openings formed in the transferring box, the conveying time is shortened, and the conveying efficiency is improved. The driving assembly can drive the rotating mechanism to rotate, so that metering of the metering spiral conveying device is facilitated, accuracy is improved, weighing of the counter box is displayed on the digital display through the controller, conveying metering of rock salt is displayed more visually through the design, and metering errors are reduced.

The application provides a method and system for testing the connectivity of sediment at the bottom of a cavity of a salt mine brine extraction old storage. The system comprises a storage, wherein the cavity bottom has sediment; an injection well, which is in communication with the top of the storage, and the wellhead of the injection well is connected with an injection flow rate and pressure measuring mechanism; a test well, which is in communication with the storage at a position within the sediment area at the bottom of the storage, and the wellhead of the test well is connected with a discharge flow rate and pressure measuring mechanism; the method comprises: the test liquid injected by the injection well flows through the sediment at the bottom of the cavity of the storage, and then flows into the test well and is discharged through the test well; the injection flow rate and pressure measuring mechanism measures the flow rate and pressure at the injection end, and the discharge flow rate and pressure measuring mechanism measures the flow rate and pressure at the discharge end, thereby solving the technical problem that the characteristics of the sediment at the bottom of the cavity of the storage are difficult to test.

The application discloses a method, equipment, medium and product for potassium salt prospecting and exploration by remote sensing hyperspectrum and aerial photography, and relates to the technical field of geological exploration. The method comprises the following steps: acquiring aerial photography measurement data and remote sensing hyperspectrum data of a to-be-explored area respectively; obtaining aerial photography potassium parameter enhancement information of the to-be-explored area according to the aerial photography measurement data; identifying and extracting gypsum and halite distribution information of the to-be-explored area according to the remote sensing hyperspectrum data; taking the gypsum and halite distribution information as an indicating element of an evaporation and deposition environment, and delineating an evaporation mineral enrichment area; taking the aerial photography potassium parameter enhancement information as a criterion for potassium enrichment intensity, and extracting an aerial photography potassium anomaly area according to a preset anomaly threshold; and determining a region, in which the evaporation mineral enrichment area and the aerial photography potassium anomaly area are spatially overlapped, as a potential mineralization section. The application realizes efficient and accurate identification of a potassium salt mineralization favorable section by organically combining and cooperatively analyzing the aerial photography measurement data and the remote sensing hyperspectrum data.