8 results about "Total calcium" patented technology

To provide a method capable of evaluating quantitatively in a short time, when evaluating carbon dioxide fixing capacity of calcium-containing waste.SOLUTION: For at least two or more kinds of samples, the pH of a mixture to which a certain amount of water is added is held in the range of 5 or more and 9 or less with an acid, and then the calcium element concentration and the sulfur element concentration of a supernatant (1) obtained by solid-liquid separation are measured. Next, the pH of a mixture obtained by adding a certain amount of water to the residue (1) obtained by the solid-liquid separation is maintained in a range of 3 or more and less than 5 with an acid, and then the calcium element concentration and the sulfur element concentration of the supernatant (2) obtained by the solid-liquid separation are measured. Finally, a carbon dioxide fixation coefficient obtained by subtracting the total sulfur element concentration from the total calcium element concentration of the supernatant (1) and the supernatant (2) is calculated and compared to quantitatively evaluate the carbon dioxide fixation capacity of the calcium-containing waste in a short time.SELECTED DRAWING: Figure 1

Disclosed herein are methods, devices, and systems for effectively separating carbonate gangue from bastnaesite without sacrificing significant REO grade or recovery. In some embodiments, centrifugal concentrators may beneficiate Ultra-Fine (UF) bastnaesite and calcite bearing flotation concentrates. The disclosed methods, devices, and systems can achieve initial gravity REO recoveries exceeding 90% while rejecting on the order of 25% to 35% of the total calcium from an assortment of rougher and cleaner flotation concentrates. Addition of stages of cleaner UF Falcon gravity separation may be operated in an open circuit configuration, from an original fine feed of 35 microns containing 50.5% REO and 5.5% Ca, to upgrade up to approximately 59% REO and 2.0% calcium. The disclosed methods, devices, and systems may comprise UF gravity concentration that may provide for recovery of rare earth oxides at levels of greater than 70%, 80% and 90%, while also rejecting more than 15%, 20%, 25%, 30, or 35% of the total calcium. Also described are benefication of fine feed of 35 microns containing 50.5% REO and 5.5% Ca, to approximately 59% REO and 2.0% calcium. In some embodiments, the disclosed methods, compounds, and systems may be used to complement existing or modified flotation systems.

The invention belongs to the technical field of fruit tree cultivation and plant growth regulation, and particularly relates to a plant growth regulator containing astaxanthin and application of the plant growth regulator in prunus humilis planting. The astaxanthin solution is scientifically sprayed, so that the acidity of the cerasus humilis fruits is remarkably reduced, the content of total calcium, water-soluble calcium and active calcium is increased, meanwhile, the synthesis of anthocyanin is improved, and the flavor, nutrition and market competitiveness of the fruits are improved.

The invention relates to the technical field of eggshell improvers, in particular to an eggshell quality evaluation method for poultry breeding and an eggshell quality optimized feed.The method comprises the steps that the actual egg breaking rate in an analysis period is calculated, the egg breaking rate reference value is determined, and then the eggshell quality state is evaluated; evaluating and analyzing the total calcium intake level in the cycle, and calculating a calcium intake coefficient; determining a temperature and humidity index based on the temperature and the relative humidity in the analysis period, and further determining a heat stress measure; determining an eggshell load measure based on the average day age and the average egg weight of the chicken flocks, and fusing the calcium intake coefficient, the heat stress measure and the eggshell load measure to determine a comprehensive risk index; quality problem types are diagnosed based on eggshell quality status, calcium intake coefficients, heat stress metrics, and eggshell load metrics. According to the invention, accurate and prospective decision support is provided for reducing egg breaking loss in poultry breeding.

This invention relates to the field of scale inhibitor technology, specifically to a scale inhibition method and scale inhibitor based on the synergistic effect of crystal distortion and dispersion. Water samples are collected from the target water system (cooling tower / circulating water / refrigeration unit), and the concentrations of scale-forming ions such as calcium, magnesium, and iron (Ca²⁺≥150mg / L, Mg²⁺≥80mg / L), pH value (7.5~9.0), and alkalinity (200~400mg / L as CaCO₃) are measured. This invention interferes with the nucleation and growth of calcium carbonate and other crystals through crystal distortion, and prevents crystal aggregation through dispersion. The synergistic effect results in a scale inhibition rate of ≥95% (at a total calcium and magnesium ion concentration of 400mg / L), which is more than 30% higher than traditional 18% phosphate scale inhibitors, increasing the total phosphate content to 21%. Simultaneously, through the synergistic effect of the dispersant and crystal distortion agent, excessive phosphorus release is avoided, eliminating the risk of eutrophication.

The invention relates to the technical field of inorganic non-metallic materials, discloses a composite calcium source calcium zinc phosphate refractory material, a preparation method and application, and aims to solve the technical problems that the reaction is out of control, the water-soluble substance residue is high and the performance is difficult to consider in the preparation of the traditional calcium zinc phosphate material. Calcium hydroxide and calcium carbonate are adopted to form a composite calcium source, and a dynamic time-sharing feeding process is matched and comprises the following steps: firstly, stirring a phosphoric acid aqueous solution and a zinc oxide-calcium hydroxide mixture at 20-35 DEG C for 20-40 minutes to form initial slurry, then adding calcium carbonate accounting for 0-30% of the total calcium mole number at an initial thickening point of the slurry, continuing to stir for 20-40 minutes, and finally, adding calcium carbonate accounting for 0-30% of the total calcium mole number at the initial thickening point of the slurry; and carrying out suction filtration, and drying at 100-110 DEG C for 1.5-2.5 hours to obtain a finished According to the method, the operable time is prolonged by more than 200%, the content of water-soluble substances is reduced by more than 50%, high early strength and structural compactness are both considered, and the method is suitable for the fields of high-end anticorrosive coatings and the like and has remarkable process and performance advantages.

The invention relates to a nutritional composition comprising carbohydrates, protein and a fat composition, wherein:(a) the nutritional composition has a total calcium content on dry matter of at least 3.5 g / kg;(b) the protein comprises casein;(c) the nutritional composition has a content of protein-bound calcium of 7.5 mmoles or less per 10 grams of casein; and(d) the ratio NPN to TN is 0.7 or less, with:NPN meaning non-protein nitrogen in the nutritional composition in grams per 100 grams of nutritional composition (g / 100 g); andTN meaning total nitrogen (TN) in the nutritional composition in g / 100 g.The invention further relates to a process for the preparation of the nutritional composition in powder form and to the composition for use in the prevention of gut discomfort and constipation in human subjects, in particular human subjects of 0 to 36 months of age.

This application provides a method, apparatus, and system for detecting the carbon fixation efficiency of calcium-based components and free total calcium in steel slag. The method involves obtaining the following samples: preparing carbonized steel slag powder samples and raw steel slag powder samples; determining the calcium-based compound content parameters: detecting the mass fraction of calcium-based compounds in the raw steel slag powder samples; determining the carbon dioxide release parameters: performing programmed temperature rise tests on the carbonized steel slag powder samples and raw steel slag powder samples under an inert atmosphere to obtain the mass fraction of carbon dioxide released by the decomposition of calcium carbonate in the carbonized steel slag powder samples and raw steel slag powder samples; determining the free total calcium content parameters of each sample; and calculating the carbon fixation efficiency: based on the aforementioned parameters, calculating the carbon fixation efficiency of the calcium-based components and the free total calcium in the steel slag, accurately correcting background carbon interference, establishing a dedicated carbon fixation efficiency detection and calculation system for the inherent calcium-based components and free total calcium in steel slag, and solving the problem of result deviation in existing detection methods.