61results about How to "Lower calcium levels" patented technology

A process is described for treating an approximately neutral fluid milk composition, including milk protein concentrate and milk plus added whey, by selecting an alkali, adjusting the pH upward, heating, cooling, selecting an acid, and adjusting the pH down before ultrafiltering and, in a more preferred process, thereafter diafiltering the treated composition. Selection of the appropriate alkali, pH values, temperatures, acid, and membrane filter porosity results in improved yields of retentate proteins having selected compositions with improved utility, including a more palatable flavor, a brod range of solution viscosities, an increase in the solubility of the dried retentates in cold water to nearly 100%, and an increase in the calcium content of the membrane filtered retentate by about 50% compared to a similar retentate from standard milk. Appropriate selection of processing conditions can result in at least one filter permeate with a protein composition enriched in alpha lactalbumin, a protein that is highly beneficial for human nutrition.

The invention provides a method for extracting lithium from salt lake brine, comprising the following steps: 1) mixing organic phase composed of salt lake brine, extracting agent and extracting medium with synergist, extracting the mixture and collecting the organic phase; 2) mixing the organic phase in step 1 with hydrochloric acid solution and carrying out back-extraction on the mixture, collecting aqueous phase to obtain aqueous solution of Lithium-ion; the step is characterized in that the extracting medium is hydrophobic ionic liquid. Compared with the traditional method for extracting lithium from salt lake brine with solvent gasoline as the medium, the method of the invention employs green and environmental-friendly ionic liquid as the medium; as a result, lithium salt extraction efficiency is improved, back-extraction acidity is lowered, what is more important is that environmental pollution and equipment corrosion due to use of a great deal of volatile organic solvent and high-concentration hydrochloric acid are avoided. In addition, the organic phase of the invention features fine cyclic applicability, thus greatly reducing production cost for extracting lithium from the salt lake brine.

The invention belongs to the technical field of metallurgy of iron and steel, and particularly relates to a calcium treatment process of rod wire alloy steel. The invention adopts a converter smelting-LF (ladle furnace) refining-RH refining-square billet continuous casting production technique. The calcium treatment process is implemented in a way that: after the LF refining finishes, feeding an iron calcium wire, silico-calcium wire or solid calcium wire into molten steel at the linear speed of 50-250m/min to control the mass percent of calcium aluminum in the molten steel at 0.08-0.16%; after the soft blow, carrying out RH treatment; after the RH treatment finishes, carrying out calcium carbonate treatment, and feeding the iron calcium wire, silico-calcium wire or solid calcium wire into molten steel at the linear speed of 50-250m/min to control the mass percent of calcium aluminum in the molten steel at 0.04-0.08%; and carrying out soft blow, and casting. When the treatment process is used for producing high-quality steel, the inclusion level can not deteriorate, the castability of the molten steel is good, the number of continuous casting furnaces is increased, the calcium content of the molten steel is low but does not influence the casting performance, and the treatment process plastifies the inclusions and improves the mechanical properties of steel.

The invention relates to the technical field of steel and iron materials and in particular relates to an ER70S-6 hot rolled wire rod and a preparation method thereof. In the process steps, deoxidation treatment is performed on the liquid steel by use of a non-calcium alloy material to avoid the increase of the calcium content in the steel, and furthermore, splashing in the process of welding is avoided. The carbon content in the steel is reduced so that the strength of the wire rod can be reduced; the percentage of area reduction and the percentage elongation of the wire rod are increased, in other words, the plasticity of the wire rod is improved, and consequently, the wire rod can be drawn into a welding wire directly without annealing and the production cost of a welding wire factory is reduced; besides, in the preparation process, the quality of the ER70S-6 hot rolled wire rod is improved by controlling the contents of various elements, such as carbon, silicon and magnesium, so that the welding property of the welding wire is improved; in the cooling process of rolling, draught fans on an air cooling line are all turned off and thermal insulation covers are all closed so that the highest tensile strength of the wire rod does not exceed 550MPa and the plasticity of the wire rod is good.

The invention relates to a method for strongly leaching laterite-nickel ore at normal pressure by using sulphuric acid, which comprises the following steps of: adding laterite-nickel ore into leacheate, mixing and ball-milling to be less than or equal to 100 mesh, adding concentrated sulphuric acid according to the liquid-solid ratio of (4-9):1, increasing the temperature to 150-160 DEG C, maintaining reaction for 20-60 minutes, decreasing the temperature to 80-100 DEG C, filter pressing, and pressing filtrate in a thermal insulation storage tank; adding leacheate, the volume of which is the same to that of a filter cake, to carry out pressure washing and filter pressing, obtaining filtrate and the filter cake again, also pressing the filtrate in the thermal insulation storage tank, discharging the filter cake, mixing and washing by using hot water so that crystal substances are thoroughly dissolved, and filtering to obtain the filtrate and the filter cake; and purifying the filtrate and removing impurities from the filtrate, continuously carrying out pressure washing by using clean water through the filter cake in a counter-current manner, and continuously detecting the pH value of pressure washing liquid until leached residues achieve emission standard. According to the invention, the leaching efficiency of nickel-cobalt can be increased by above 99wt%; most of all metallic elements which can be dissolved by sulphuric acid can be leached; silica gel does not exist in the leaching process; and the filtering performance of the leached residues is good.

The invention discloses a method for recovering rare earth from precipitation sludge of a rare earth wastewater pool, comprising the main steps: firstly, preroasting the precipitation sludge of the rare earth wastewater pool, then leaching the roasted product with mineral acid to obtain a leach solution containing rare earth, and sequentially adding ammonium sulfate and oxalic acid to the leach solution so the rare earth is separated from soluble impurities in a manner of solid phase precipitation. The method has a simple process, convenient operation and low cost, solves the problem of difficult complete separation in a condition of coexistence of rare earth and calcium in a solution, can efficiently recover the rare earth in the precipitation sludge of the rare earth wastewater pool, and realizes separation of rare earth from calcium, aluminum and iron; the recovery rate of rare earth reaches above 99%; and the recovered rare earth oxide can be returned to a production main flow of a rare earth smeltery.

An inorganic silicate-substituted calcium phosphate hydroxyapatite, useful as a biomaterial, has a Ca/P molar ratio in the range 2.05 to 2.55 and a Ca/(P+Si) molar ratio less than 1.66. The hydroxyapatite can be substantially free of carbonate ions. The material has relatively high solubility and is able to release silicon into solution.

The invention discloses a flotation calcium-removing agent and method for magnesite. Hydrochloric acid, sodium phosphate, dodecylamine, sodium hydroxide, sodium silicate, sodium hexametaphosphate, oleic acid and FZ-8 are taken as flotation calcium-removing agents, and different scientific and reasonable agent formula systems are adopted at different flotation stages, so that calcium content of the magnesite can be lowered effectively; meanwhile, a process flow of combining reverse flotation and positive flotation and adding flotation agents with a reasonable formula segmentally is adopted, so that the calcium content of the magnesite can be lowered effectively; as proved by detection, the MgO content of concentrated magnesite obtained by the flotation calcium-removing method is over 99 percent, the total impurity content is lower than 1.0 percent, and the CaO content is lower than 0.80 percent. By adopting the flotation calcium-removing agent and method, the calcium removal rate can be increased effectively, and the quality of the magnesite is improved; moreover, the method is easy and convenient to operate, is simple in process, has contribution to popularization, and has a considerable application prospect.

A device for reducing the content of polluting and/or unwanted substances in water, including a support made of polymeric material for a catalyst of the reaction of degradation of inorganic salts into gaseous substances; the catalyst, intended to reduce the energy required for the activation of the reaction and to accelerate its course, is an enzyme preferably selected from the group of lyases, and even more preferably selected from the subgroup of carbonic anhydrases. The inorganic are being carbonates, and/or hydrogen carbonates of calcium and/or magnesium, the reaction being the reaction of decarboxylation and acting for the conversion of inorganic salts into carbon dioxide and water according to the following reaction:

HCO₃⁻+H⁺H₂O+CO₂.

The embodiment of the invention discloses a composition, a preparation method and an application of the composition in preparation of medicines, health-care products and foods for treating pet joint diseases. The composition comprises glucosamine, chondroitin sulfate, dimethyl sulfone, green mussels, haematococcus pluvialis, frankincense, curcumin, coix seeds and rhizoma smilacis glabrae. The composition fundamentally inhibits and relieves arthritis from the aspects of eliminating free radicals, neutralizing free radicals, inhibiting proinflammatory cell generation and the like, supplements necessary nutrient substances for cartilage cell growth, promotes synthesis of new cartilage, and achieves the effect of treating both symptoms and root causes in combination with traditional Chinese medicine components for rapid detumescence and pain relief.

The invention belongs to the field of metal material, which is a calcium remover for aluminum-silicon alloy and a preparation method thereof. The calcium remover comprises aluminum and fluorine; the calcium remover is characterized by further comprising nickel, silicon, boron and carbon, the mass percentage of each element is as follows: 11.0-21.0% of the aluminum, 24.0-44.0% of the fluorine, 5.0-30.0% of the nickel, 7.0-35.0% of the silicon, 0.1-5.0% of the boron and 5.0-20.0% of the carbon. The preparation method comprises the following steps: weighing each material according to the mass percentage, 35-65% of AlF3, 20-50% of master alloy Ni-Si-B and 5-20% of carbon powder; performing rapid solidification processing of argon aerosol to the master alloy Ni-Si-B, obtaining granular master alloy Ni-Si-B; uniformly mixing the AlF3 powder, the granular Ni-Si-B powder and the carbon powder, using a briquetting machine to press the powder, and preparing into lumpish calcium remover. The calcium remover for the aluminum-silicon alloy of the invention is highly efficient and environmentally friendly, simple in preparation process, good in process stability, low in cost and the like; when the adding amount is 0.2%, the calcium content in the industrial aluminum-silicon piston alloy is reduced lower than 20 ppm, and the calcium remover for the aluminum-silicon alloy is a novel modification agent similar to eutectic Al-Si alloy.

The invention discloses a method for preparing chromium-containing magnesia from magnesite light burning powder. The method is characterized by comprising the following steps: pretreating light burning powder at the temperature of 850 DEG C or higher to obtain pretreated light burning powder; hydrating the pretreated light burning powder with water to obtain ore pulp, adding a magnesium source tothe ore pulp, and removing calcium to obtain calcium-free ore pulp; adding a Cr source to the calcium-free ore pulp; performing chromium precipitation reaction, and performing solid-liquid separationto obtain a precursor; and sintering the precursor to obtain the chromium-containing magnesia. Through a lot of researches, inventors find that the light burning powder is preheated to the set temperature so as to be pretreated, then hydration is preformed, the magnesium source (providing Mg<2+>) is added to the ore pulp obtained by hydration, calcium hydroxide impurities are converted through theprecipitation conversion mechanism, and then, the Cr source (providing Cr<3+>) is added; and through the precipitation conversion mechanism, formed chromium hydroxide is avoided from falling and separating from the surface of a magnesium oxide source, and the uniform dispersity of the chromium hydroxide in the precursor is greatly improved, thereby obtaining the chromium-containing magnesia withexcellent performance.

The invention relates to an inoculant mixture for the treatment of molten cast iron, comprising 5 to 75% by weight of a ferro-silicon alloy of type A where Si/Fe>2, containing 0.005 to 3% by weight of rare earths, 0.005 to 3% bismuth, lead and/or antimony and less than 3% calcium, with a ratio (Bi+Pb+Sb)/TR of between 0.9 and 2.2 and 25 to 95% of at least one alloy of type B, based on silicon or ferro-silicon such that Si/Fe>2, containing calcium to a level such that the total amount of calcium in the mixture is from 0.3 to 3%. The above mixtures have a good granulometric stability over time and provide an efficient inoculation of cast pieces, in particular of thin pieces.

The invention provides a method of preparing a low-calcium polymeric aluminum chloride water purifier from aluminum ash, hydrochloric acid, and optical red mud. The preparation method comprises following steps: burning aluminum ash, calcium carbonate, and/or calcium oxide in an oxidative atmosphere; burning the obtained material, reacting the burned material with hydrochloric acid and optical redmud to prepare slurry containing polymeric aluminum chloride, adding sodium sulfate to carry out reactions; filtering the slurry, wherein the filtrate is the water purifier, washing the filter residues by water, and utilizing the obtained solid slag or stacking /burying the solid slag. A problem that when aluminum is hydrolyzed or acid-hydrolyzed, hydrogen is generated and the hydrogen is combustible and explosive is solved. A problem that when aluminum nitride is hydrolyzed, ammonia is generated and the water purified by the water purifier is polluted by ammonia nitrogen is solved. The low activity alumina, which comprises alpha-alumina, can be activated. The fluorine containing aluminum ash is stabilized and detoxicated. Moreover, a low-calcium polymeric aluminum chloride water purifierand a low-calcium polymeric ferric aluminum chloride water purifier are prepared, and the hardness of the processed water is barely increased, during the application process of the water purifier. Thetechnology is simple, the investment and operation cost is low, and the obtained solid slag is common solid wastes.

The invention discloses a processing method of residual oil with high calcium and nitrogen content and high viscosity. The method comprises steps as follows: raw oil enters a suspended bed reactor andsubjected to a reaction under the action of hydrogen and a suspended bed catalyst; obtained hydrogenated oil enters a fluidized bed reaction unit for a reaction, the fluidized bed reaction unit comprises two fluidized bed reaction zones connected in series, the two fluidized bed reaction zones comprise a first-stage fluidized bed reaction zone and a second-stage fluidized bed reaction zone, the hydrogenated oil is subjected to atmosphere-vacuum distillation and fractional distillation by a fractionating tower, and gasoline, light diesel oil, heavy diesel oil, wax oil and vacuum residual oil are obtained. According to the method, the process is simple, impurities in raw materials can be removed effectively, and the raw materials are converted into light fractions effectively.

The invention discloses a pretreatment method for cooperatively treating fly ash by a cement kiln, and belongs to the technical field of fly ash pretreatment. Quantitative sodium hydroxide is firstlyadded in a fly ash washing and stirring process, then quantitative carbon dioxide is introduced, after water-ash mixed liquid is subjected to solid-liquid separation, the content of calcium in the pretreated fly ash is increased, the content of calcium in washing liquid is reduced, and meanwhile, the pH value of the washing liquid is adjusted.

The invention provides a refractory material for iron and steel metallurgy. The refractory material solves the problem that the existing agitator has a short service life because of structure spalling and thermal spalling caused by poor erosion resistance, severe molten iron erosion and poor thermal shock resistance. The refractory material comprises 10 to 20 parts by weight of sillimanite, 1 to 3 parts by weight of Ti3AlC3, 10 to 20 parts by weight of calcium hexaluminate, 10 to 20 parts by weight of white corundum, 5 to 15 parts by weight of chrome corundum, 5 to 10 parts by weight of sillimanite micro-powder, 3 to 5 parts by weight of cuprospinel micro-powder, 3 to 8 parts by weight of aluminum-rich spinel powder, 3 to 5 parts by weight of nickel oxide powder, 2 to 5 parts by weight of pure calcium aluminate cement, 2 to 4 parts by weight of aluminum gel powder and 0.35 parts by weight of additives. The above raw materials are blended according to the above ratio so that the refractory castable material for a desulfurization gun is obtained.

The invention relates to a method for efficiently preparing low-calcium-content folinic acid. The method for efficiently preparing the low-calcium-content folinic acid comprises the following steps: dropwise adding a dissolved folinic acid aqueous solution and diluted hydrochloric acid with certain concentration into water, strictly controlling system temperature and pH value, separating out solids, washing, and drying, so that the low-calcium-content folinic acid is obtained. The obtained low-calcium-content folinic acid product is good in solid physical property and low in calcium content, and operation is easy, so that the method for efficiently preparing the low-calcium-content folinic acid is applicable to industrial production.

The invention relates to a method for separating P and Ca in medium-low-grade phosphorite and a method for producing fertilizer, and belongs to the technical field of phosphorite cleaning processing and utilization. The method for separating P and Ca in medium-low-grade phosphorite comprises the following steps: (1) mixing phosphorite with a nitric acid solution, reacting at 30-70 DEG C for 0.5-2hours, and carrying out solid-liquid separation to obtain an acid-insoluble substance and an acidolysis clear solution; (2) neutralizing the acidolysis clear solution, and controlling the pH value ofthe solution to be greater than or equal to 3.5 and less than or equal to 6.5; carrying out solid-liquid separation to obtain a solid phase I and a liquid phase I; (3) mixing the solid phase I with anitric acid solution, and reacting at 30-70 DEG C for 0.3-2 hours to obtain a secondary acidolysis solution; (4) cooling the secondary acidolysis solution to -10 DEG C to 0 DEG C for crystallization;after crystallization is completed, carrying out solid-liquid separation to obtain a solid phase II and a liquid phase II. According to the process, the separation rate of P and Ca in the medium-low-grade phosphorite is greatly increased, the utilization rate of resources such as P and Ca is increased, and a new technical route is opened up for processing the medium-low-grade phosphorite by a nitric acid method.