992 results about "Calcium in biology" patented technology

A process is disclosed for producing cement clinker, comprising the steps of: a) providing a mixture of ground calcareous materials and ground argillaceous materials; b) heating the mixture of step a) to a temperature sufficient to calcine and fuse the ground materials to form the cement clinker, and thereby producing an exhaust gas containing CO2; c) catalysing the hydration of at least a portion of the CO2 contained in the exhaust gas and producing a solution containing bicarbonate ions and hydrogen ions; and d) adding to the solution obtained in step c) metal ions, and adjusting the pH of the solution to precipitate a carbonate or said metal. Preferably, the metal ions are Ca++ obtained from the dissolution of a material selected from the group consisting of CaCl2, cement kiln dust and sea salts and the carbonate is CaCO3 which is advantageously recycled into the process by adding the CaCO3 to the mixture of step a). A cement plant for performing this process is also disclosed.

The invention discloses a red mud preparing sulpho-aluminate cement, which is characterized by the following: using 26%-41% red mud to take place of part of aluminium and calcium raw material and whole silica and irony raw material of regular sulpho-aluminate cement production; grinding for certain fineness; desining the C4A3S,C2S,C4AF and main mineral of cement clinker; Preparing sulpho-aluminate cement by alumina, lime carbonate, calcium sulfate and other burdens. The sulpho-aluminate cement has quick induration speed and high early strength.

The invention relates to a method for separating CO2 from combustion gases, which can be used at areas with large emissions (thermal power stations using any carbonaceous fuel). The separated CO2 stream can be used and / or contained in geological formations. The inventive method aims to reduce the high costs involved in CO2 separation which prevent large-scale use of the CO2 confinement options included in the UN's IPCC reports. Said method consists of bringing the combustion gases into contact with a calcareous sorbent (limestone, calcined dolomite) at 650-750° C., thereby producing the CO2 capture reaction by means of the rapid carbonation of the sorbent. The sorbent is regenerated in another reactor (calciner) which operates in CO2 or CO2 / H2O atmospheres.

The invention discloses a calcium silicate hydrate gel solution early strength agent and a preparation method thereof, and relates to the technical field of construction material production. The early strength agent and the method are used for solving problems of complicated preparation process, high cost, storage difficulty, and poor early strength effect of traditional calcium silicate hydrate powder. The calcium silicate hydrate gel solution early strength agent comprises a calcareous material, a siliceous material, a gel dispersant, and water. A weight ratio of the calcareous material to the siliceous material is 0.3-3:1. A weight ratio of water to the total of the calcareous material and the siliceous material is 5-30:1. The mass percentage of the gel dispersant is 0.1-2.0%. The preparation method of the early strength agent comprises the following steps: reaction materials are weighed; a sodium silicate water solution and a calcium nitrate water solution are respectively prepared; the two are mixed and are subjected to a reaction, such that a gel mixture solution is obtained; suction filtration is carried out; and water and the dispersant are added for re-dispersion. The early strength agent is uniform and stable, and is convenient to store. The early strength agent is highly convenient to use, and has a good early strength effect. With the early strength agent, an alkali-aggregate reaction risk can be effectively reduced.

The invention provides a calcium supplementing and calcium locking health care food. The calcium supplementing and calcium locking health care food comprises calcium, colostrum basic protein, chondroitin sulfate, D-glucosamine, vitamin D, casein phosphopeptides and the like, wherein the colostrum basic protein is obtained by degreasing, separating, concentrating, removing casein, alpha-lactoalbumin, beta-lactoglobulin and substances with molecular weights of more than 30 kDa and less than 1 kDa and drying at a low temperature; the biggest difference between the calcium supplementing and calcium locking health care food prepared by the method provided by the invention and the prior art is that the capacity of the bone tissue in actively absorbing osteoblast nutrition like calcium, ossein and the like can be effectively improved and effects of activating osteoblasts and inhibiting osteoclast activity to enhance bone mineral density and length and promote the health of the bone are obtained. The calcium supplementing and calcium locking health care food provided by the invention, which is a latest generation of domestic osteoarthrosis rehabilitation product, obtains breakthrough in the calcium supplementing effect, can be also used for helping the bone to preferably absorb the calcium in the food, has no toxic and side effect after being taken for a long time.

The invention discloses calcium supplement health-care tea oil, relating to the field of biomedical technology. The calcium supplement health-care tea oil is prepared from tea oil, dried small shrimp and calcium carbonate. Specially, the preparation method comprises the steps of: auxiliary material pretreatment, auxiliary material retreatment, auxiliary material mixing, mixed auxiliary material treatment, extraction, purification and filtering. The calcium supplement health-care tea oil has the characteristics of complete nutrition, capability of supplementing calcium, and the like, not only can be suitable for the calcium-deficient crowds to eat, but also can be suitable for children and the old to eat.

The invention discloses a calcium silicate hydrate gel solution early strength agent and a preparation method thereof, and relates to the technical field of construction material production. The early strength agent and the method are used for solving problems of complicated preparation process, high cost, storage difficulty, weighing difficulty, and poor early strength effect of traditional calcium silicate hydrate powder. The calcium silicate hydrate gel solution early strength agent comprises a calcareous material, a siliceous material, a gel dispersant, and water. A weight ratio of the calcareous material to the siliceous material is 0.3-3:1. A weight ratio of water to the total of the calcareous material and the siliceous material is 5-30:1. The mass percentage of the gel dispersant is 0.01-0.50%. The preparation method of the early strength agent comprises the following steps: reaction materials are weighed; a sodium silicate water solution and a calcium nitrate water solution are respectively prepared; the gel dispersant is respectively added into the solutions; and the two solutions are mixed and allowed to react for a certain period of time. The early strength agent is convenient to store, transport and weigh, and have good product stability. With the early strength agent, cement-based material early strength can be effectively improved.

The invention relates to a method for improving and protecting a collapsible loess slope project, which is characterized in that: the loess slope project is protected by adopting improved loess (3), gunny bags (4), a protective net (5), a geogrid (6) and a drainage ditch (8), wherein the improved loess is prepared by stirring and blending lime, fly ash and loess in a volume ratio, the total volume of the lime and fly ash accounts for no less than 30 percent of the volume of the admixture, the SiO2 and Al2O3 total content of the fly ash is no less than 75 percent, and the lime is calcium quicklime or calcium hydrated lime; the geogrid (6) is high-density polyethylene uniaxial geogrid; the gunny bags (4) are jute gunny bags; and the protective net (5) is made of a flexible stainless steel material. The method has the advantages of stabilizing the slope, solving the stability problem of the fill slope, realizing waste utilization, afforesting the environment and preventing soil erosion by improving the structural protective system consisting of the loess and geogrid; and the method is suitable for improving the collapsible loess project in civil engineering and can be used for projects such as highway embankment filling, building foundation improvement, retaining wall reinforcement and the like.

The invention discloses a lightweight concrete exterior wall insulation building block and a production method thereof. The lightweight concrete exterior wall insulation building block is prepared by mixing the following raw material components in proportion by weight: 20-50 of cement, 20-40 of fly ash, 8-20 of fine sand, 1-8 of calcareous material, 5-16 of plant filler, 0.2-0.5 of adjuvant, 8-15 of water and 0.3-0.7 of foaming agent. The production method of the lightweight concrete exterior wall insulation building block comprises the following steps of: forming raw material slurry by uniformly mixing production raw materials in mixing proportion; adding the water to the foaming agent, and generating uniform and stable bubbles by using a foaming device; mixing the bubbles with the raw material slurry so as to prepare bubble concrete slurry; and casting the bubble concrete slurry into a mold and curing. According to the lightweight concrete exterior wall insulation building block and the production method of the lightweight concrete exterior wall insulation building block, the plant filler, such as sawdust or crop straw powder, is mixed, so that the weight is reduced, the flexibility is improved, and the improvement on the strength of a finished product and the cracking prevention are favored; and the bubbles are enabled to be uniformly distributed in the raw material slurry by adding the foaming agent, so that not only is the weight of the building block reduced, but also the heat preservation and heat insulation effects are improved.

The invention relates to a coarse-cereal dried bean curd roll and a preparation method thereof. The coarse-cereal dried bean curd roll is a bean product which is made by raw materials such as 45-85 percent of soy beans, 10-35 percent of black beans, 5-30 percent of green beans, 0-20 percent of peanuts and the like through steps of soaking, pulp grinding, pulp stewing, roll formation and drying. The coarse-cereal dried bean curd roll contains rich nutrients in various coarse cereals such as the black beans, the soy beans, the green beans and the peanuts, is rich in various vitamins, dietary fibers and minerals such as calcium, iron and the like and can promote the balance of dietary nutrition of people; when people eat the coarse-cereal dried bean curd roll for a long term, the effects of promoting blood circulation, reducing cholesterol, improving mental function, complementing calcium, preventing osteoporosis, preventing iron-deficiency anemia and the like can be achieved; the coarse-cereal dried bean curd roll is dark yellow and glossy, the rolls are even, the rehydration performance is good, the taste is flexible and unique, the roll is fragrant to taste and the aftertaste is long; and the yield of the process is high, the quality of the obtained product is high, the production cost is lower and the economic benefit is considerable.

The invention discloses a high iron aluminate-belite-sulfoaluminate cement clinker and a preparation method thereof. The high iron aluminate-belite-sulfoaluminate cement clinker comprises the following components in percentages by mass: 25 to 35% of C4A3S<->, 32 to 42% of C2S, 10% to 30% of C4AF and 15 to 25% of f-CaSO4; and besides, the cement clinker also comprises CT. The invention also discloses a preparation method for the cement clinker. The preparation method comprises the following steps: respectively subjecting a calcareous raw material, a salic raw material, a ferruginous raw material and a gypsum component to drying, crushing and grinding, and carrying out weighing and mixing in proportion, adding a certain amount of water and carrying out uniform mixing, carrying out press molding so as to obtain sample blocks, then carrying out calcination at 950 DEG C for 30 min, then immediately transferring the calcined sample blocks into a high-temperature furnace with a temperature of1275 DEG C to 1350 DEG C, continuing calcination for 30 to 60 min, and carrying out air-blast cooling so as to obtain the clinker. The preparation method provided by the invention gets rid of the modulus limit of traditional sulfoaluminate cement, and improves the content of free gypsum on the basis of high iron aluminate and high belite; and the clinker prepared by using the preparation method provided by the invention has mechanical properties capable of meeting requirements of sulfoaluminate cement 525, and has good wear resistance.

The present invention provides one comprehensive technology of utilizing eutrophic and algalbloom polluted precipitant in in-situ algae killing, ventilation and phosphate fixing. By means of the said technology, bed mud or bankside clay is used in treating algalbloom in low cost. The said technology can eliminate algae effectively, increase dissolved oxygen concentration in water, reduce H2S and NH3-N produced, improve water quality, speed the degradation of organic in water, increase calcium in water, make bottom matter loose and ventilating, minimize and fix water body, bed mud and deposited phosphor in algae cell for no further utilization by living things. The present invention may be used in comprehensive treatment of red tide in sea, water bloom in fresh water, etc.

The invention relates to a staged fracturing construction yield increment method for waterpower in a deep thickened oil deposit thick-bedded sandstone storage layer. The method comprises the following steps: identifying oil-free calcium interlayer, a soil interlayer and a physical property interlayer in a thickened oil thick storage layer; selecting the oil-free calcium interlayer, the sol interlayer and the physical property interlayer in different layer sections in a well as a staged fracturing interlayer so as to form a plurality of fracturing layer sections; keeping away from the staged fracturing interlayer; carrying out large-aperture perforation to a plurality of staged fracturing layer sections by cable transmission cooperated with perforation bullets; pre-treating the staged fracturing layer sections by bio-enzyme depolymerization liquid; and carrying out staged fracturing construction to staged fracturing pipe columns inside layers in a well. According to the invention, staged uniform transform of a thickened oil layer is realized; fracturing effect is improved; single-well fracturing yield increment amplitude is increased; and a fracturing measure validity period is prolonged.

The present invention is directed to a homeopathic complex for use in the treatment of various diseases or disorders, including use as an anti-infective agent and / or in the regeneration of diseased or damaged tissue. Ideally, the anti-infective homeopathic complex of the invention may comprise a homeopathic tincture or dilutions thereof of Hepar sulphuris calcareum or other similar profiled Calcarea or Sulphur salt or acid, Lachesis muta or other remedy with a similar profile, Mercurius Solubilis or similar mercury containing remedy and Silica or other silica containing compounds.

The invention discloses a kind of minimum inflation high magnesium moderate heat cement, a production method therefor and applications thereof. The cement is prepared from calcium raw materials, silicon materials, aluminum raw materials, iron raw materials, magnesium raw materials, correction raw materials and clinker activating agents through two-grinding and one-burning process. The content of MgO in the clinkers is raised to 6-9%, the content of periclase is controlled to 2-8%, the minimum inflation performance of periclase can be used fully, the contraction of mass concrete can be compensated, concrete cracks can be decreased, and therefore the volume stability and safety of concrete are raised.

The invention discloses an ecological fish farming method in a rice field, which comprises the following steps of rice field preparation, rice field transformation, fish farming facility preparation, rice seedling transplantation, biosorption, rice field disinfection, irrigation, fertilization, stocking fish seed selection, stocking fish fry disinfection, stocking and feeding management, wherein annular field fish ditches dug through the rice field transformation are V-shaped ditches arranged on the inner sides of ridges around the rice field; the biosorption utilizes a biosorption agent to adsorb heavy metal in rice field soil and irrigation water; and stocking fish seeds are selected from eight-beard catfishes. The invention further discloses rice produced by rice plants planted in the rice field using the ecological fish farming method. According to the method and the rice, an effective usable area of the rice field is increased significantly; pollution of the heavy metal such as lead and cadmium is reduced; integral benefits of fish farming in the rice field are improved; the ecological rice contains rich protein, more microelements such as iron, magnesium and calcium, and vitamin C, has no chemical pesticide residual, and is green and environment-friendly; and the content of the heavy metal such as lead and cadmium is very low.

The invention relates to a branch flotation technology for collophanite, which comprises the following steps: crushing and grinding silicon calcium collophanite ores, and then adding water and mixing into slurry, and guiding the slurry to flow into a flotation groove; adding a regulator and a collecting agent for mixing the slurry, and then pouring into a reverse flotation system for performing reverse flotation, wherein products in the groove are reverse flotation concentrates; grading the reverse flotation concentrates into coarse fraction and fine fraction; pouring the coarse fraction partinto a desilicification reverse flotation groove, adding a desilicification regulator and a desilicification collecting agent for mixing the slurry, and then pouring into a desilicification system for performing reverse flotation, wherein products in the groove are desilicification reverse flotation concentrates; pouring the fine fraction part into a normal flotation groove, adding a normal flotation pH (Potential of Hydrogen) regulator, the regulator and the collecting agent for mixing the slurry, and then performing normal flotation, wherein foam products of the normal flotation are normal flotation concentrates; mixing the normal flotation concentrates with the desilicification reverse flotation concentrates, thereby forming the final phosphorus concentrates; and concentrating, filtering and drying, thereby obtaining phosphorus concentrates. The branch flotation technology for collophanite has the advantages that the separation efficiency is high, the technic index is excellent, the content of MgO in the obtained phosphorus concentrates is lower, the quality of the concentrates is high, and the comprehensive cost of the final product of the phosphor concentrates is lower.

The invention discloses a treatment method for blow-filling a foundation on islands and reefs in South China Sea with carbonate sand. The method comprises the steps that 1, construction and measurement are conducted; 2, a conveying pipe is laid; 3, a dredge boat sucks seabed carbonate sand; 4, a microorganism bacteria solution and a nutrient solution are prepared; and 5, materials are sufficiently aerated and stirred in a mixing tank. The treatment method has the beneficial effects that a microorganism curing agent is added into the mixing tank, so that microorganisms and the carbonate sand are sufficiently stirred and mixed in the mixing tank, then the mixed carbonate sand blow-fills a reef, and then the processed foundation is formed. In this way, after a period of time, the strength, deformation and stability of the processed foundation formed by the mixed carbonate sand all meet the engineering construction requirement, and other redundant foundation treatment measures are not needed. The treatment method has the remarkable characteristics that construction is convenient, the project cost is low, the construction period is remarkably shortened, and pollution to the environment is avoided.

The invention discloses a three-axis test sample preparation device of low-strength microorganism calcareous sand and an application method thereof. A sample preparation device assembly comprises a mold barrel, a three-axis instrument base and a compaction device. The mold barrel comprises two pieces of splitting molds, a lower test sample cap and a rubber plug. Upper and lower ends of the mold barrel are matched with the rubber plug and the lower test sample cap respectively. The two pieces of splitting molds are hooped through a tightening ring sleeve. A rubber sealing strip is stuck on a vertical section of each splitting mold. Each splitting mold is provided with an exhausting hole. No squeezing disturbance on the test sample is caused by preparation, sampling and sample filling processes of microorganism soil, and reliable static and dynamic characteristic parameters of the low-strength microorganism calcareous sand can be obtained. The application method of the test sample preparation device comprises the steps of assembling the mold barrel, filling a sand soil sample, grouting and reinforcing microorganisms, mounting and removing the mold barrel on a three-axis instrument and the like.

The invention provides an alga-calcium-mineral air purification medium. The air purification medium is mainly prepared from, by weight, 42-48.44 parts of alga mineral powder, 4.2-9.8 parts of calcium powder, 0.8-1.2 parts of catalysis powder, 2.4-3.0 parts of mineral modifiers, 36-48 parts of liquid-phase media and 1.5-1.8 parts of photocatalyst. The raw materials are subjected to pre-stirring, hole forming and granulating, polishing and oxidation, primary drying, photocatalyst surface treatment and secondary drying to form particle medium carriers. The air purification medium has the advantages that the absorption-catalysis-purification performance is outstanding, the preparation process is mild and free of rigorous requirements, product application is flexible, and an air purification device with de-odoring, deodorization, taste removal or bacteria resistance and mildew-proof functions by applying appropriate matched application components.

The invention relates to a high-calcium freshwater fish ball and a preparation method of the high-calcium freshwater fish ball, belonging to the technical field of the processing and the producing of food. The minced fillet and the fishbone mud are taken as raw materials. The preparation method comprises the following steps of: adding shop fat with a certain quantity and the other auxiliary materials, chopping in a mixing way, forming fish ball, curing fish ball and the like. On the basis that the peculiar taste of the fish ball is guaranteed, the high-calcium freshwater fish ball provided by the invention is rich in elasticity, and has the loose, soft, fine and smooth mouth feel when being eaten, and the pursuing of modern people to nutrition health can be met. The problems that the calcium is sufficiently ingested by people, and the problem that the fish bone generated when the freshwater is deeply processed is not well used in the prior art can be solved, the additional value of the fish bone can be improved, a feasible technical scheme can be provided for the treatment of the fish bone, and the considerable economic benefit can be brought to the enterprises.

The invention discloses flour rich in protein. The flour rich in protein is composed of, by weight, 100-110 parts of wheat flour, 20-30 parts of wheat germ flour, 20-30 parts of soybeans, 1-2 parts of Chinese chestnut leaves, 2-3 parts of tomato leaves, 3-4 parts of pericarpium citri reticulatae, 1-2 parts of liquorice, 2-3 parts of ginkgo leaves, 8-10 parts of osmanthus fragrans, 12-16 parts of Chinese toon sprout, 11-15 parts of sea sedge, 20-25 parts of kudzu vine roots, 22-26 parts of cassava, 30-35 parts of Chinese walnuts, 10-15 parts of kulit udang, 1-2 parts of food additives, and appropriate water. According to the flour rich in protein, the wheat flour, the wheat germ flour and the soybean are used as main raw materials, the flour is rich in nutrient, supplements various nutrient elements needed by a human body, and further has the effects of improving the immunity of the organism, delaying senescence of the human body, preventing tumors and the like. The added raw materials are rich in protein, the kulit undang not only is rich in calcium and good protein but also has obvious effects of being anticancer, reducing blood fat and blood pressure and the like. The added Chinese walnuts contain much protein and unsaturated fatty acid which is essential to human nutrition, so that arteriosclerosis is prevented, fatigue and pressure are effectively relieved, and the functions of moistening lung, nourishing vitality, nourishing blood, relieving asthma, moistening dryness, reducing phlegm, removing deficiency-cold and the like are achieved.

The invention provides bread. The bread is prepared from the following ingredients: high-gluten flour, sour dough, water, olive oil, fresh yeast and table salt; and the bread is especially prepared from the following ingredients in parts by weight: 29-30 parts of high-gluten flour, 50-51 parts of sour dough, 15-16 parts of water, 3-4 parts of olive oil, 1 part of fresh yeast and 1 part of table salt. The bread has the following beneficial effects: firstly, ingredients of the fermented milk are natural and relatively high in protein and calcium contents, so that nutritive values of the bread products are increased; secondly, the proteins are broken down by self-metabolisms of the lactobacillus floras in the fermented milk so as to produce amino acid flavoring precursors to benefit flavor-improvement of the bread, and textural structure of the bread is improved by extracellular polysaccharides produced by the metabolisms; thirdly, a diversified microbial environment is created by co-fermentation of the lactobacillus floras in the fermented milk with the industrial yeasts, so that growth of miscellaneous bacteria is inhibited and shelf lives of the food products are thereby prolonged; and fourthly, no food additive is added into the bread, so that a bread product which is natural, healthy and relatively good in taste is prepared.

The invention relates to a positive flotation method of low grade refractory phosphate ores. The method comprises the following specific steps: 1. crushing and grinding ores: grinding raw ore according to the grinding density of 1:1 to -0.074mm of 55-60% tailings discarding fineness; 2. performing positive flotation: firstly, roughing, namely adding depressant sodium carbonate, big modulus sodiumsilicate and collector ZJ oleic acid composite, stirring to obtain roughing concentrate, roughing middlings and roughing tailings; secondly, concentrating, namely adding big modulus sodium silicate in the roughing concentrate to perform 3-4 times of concentrations and obtain concentrating middlings and phosphorus product concentrate; thirdly, scavenging, namely adding ZJ oleic acid composite in the roughing tailings to perform 2-3 times of scavengings and obtain scavenging middlings and tailings; and 3. regrinding and reprocessing, namely further dissociating ores, and reprocessing to obtain tailings and residual phosphorus concentrate. The invention is characterized in that the ore grinding cost is low, the dosage of reagents is low, the ZJ oleic acid composite is easy to prepare and is convenient to use, the separating effect of phosphorus ores and gangue mineral is obvious, the separation indexes are good, etc; and the method is especially suitable to be used in the flotation of silicon-poor deposition-calcium phosphorite type phosphate ores with a concentration of P2O5 of less than 20%.

The invention relates to a three-in-one acidification unblocking agent for oil well unblocking and an application method thereof. The acid liquid formula is prepared from the following ingredients inpercentage by weight: 18 to 26 percent of polyorganic acid, 15 to 20 percent of precipitation inhibitors, 5 to 8 percent of iron ion chelating agents, 4 to 7 percent of anti-swelling agents, 6 to 9 percent of corrosion inhibitors, 3 to 6 percent of hydrogen fluoride, 2 to 5 percent of demulsifiers, 3 to 6 percent of acid sludge inhibitors, 3 to 6 percent of water locking prevention agents and thebalance of clean water. During the preparation, all ingredients are added into an anti-corrosion reactor according to the weight parts; the stirring is performed for 40 to 50 minutes at the normal temperature; a finished product is obtained after the uniform dissolution. The main functions of pre-acid, host acid and post-acid in the conventional acidification liquid are integrated; inorganic scales such as mud filtering cake, calcium matters and iron matters and organic scales such as colloid matter and asphalt matter in the stratum can be effectively dissolved; the secondary settlement damageon a reservoir cannot be caused. The three-in-one acidification unblocking agent can also be used as the acidification unblocking agent for pressure reduction and injection increase of an oil field water injection oil.

The invention discloses a nutrient composition for enhancing shell hardening speed of shrimp and crab. The composition comprises the following components in percentage by weight: 1-50% of calcium gluconate, 1-40% of shell factor, 1-40% of immunity enhancement factor and 1-40% of traditional Chinese medicine anti-stress factor. The nutrient composition contains a plurality of active ingredients indispensable for aquatic animal growth, effectively enhances calcium, increases shell hardening speed, effectively improves the immunity of the shrimp and crab organisms, supplements indispensable mineral matters and microelements in a shrimp and crab culturing water body, accelerates the shell hardening of the shrimp and crab, prevents the failure of the shrimp and crab shelling and has the advantages of no toxic or side effect or medicament residue, convenient use and low cost.

The invention relates to a flotation technology of a middle-low-grade silica-calcia bearing phosphate rock. The technology is implemented by the following steps that: after collophanite is processed by crushing and ore grinding until monomer separation occurs, a reverse flotation and de-magging system is used for carrying out flotation and de-magging work; desliming is carried out on rough concentrate after the flotation and de-magging process; a coarse ore particle product after desliming enters the reverse flotation and de-magging system to carry out flotation and desilicication work; and a fine ore particle product enters the reverse flotation and de-magging system again and the flotation and de-magging work is carried out on the fine ore particle product again by adding inorganic salt for condensation of fine particles and reducing the rotating speed of a flotation machine impeller. In the prior art, after desliming of the middle-low-grade silica-calcia bearing phosphate rock, lots of fine ore particles can be obtained and the grade is low; and the processed fine ore particles can not added to the concentrate or gangue directly. However, with the technology, the problem that the sludge can not be processed after the desliming work of the dual-reverse flotation process of the middle-low-grade silica-calcia bearing phosphate rock can be solved. Meanwhile, the flotation foam can be improved; the sorting feature can be improved; and the reagent dosage is reduced.

The invention relates to non-autoclave primary health care (PHC) pipe pile concrete. The concrete is characterized by being prepared from the following raw materials: a binding material, a water reducing agent, water, coarse aggregate, and fine aggregate, wherein the binding material is prepared from the following raw materials by mass ratio: 3.0-8.0% of rich calcareous material, 25-40% of rich siliceous material and the balance of cement; the water reducing agent accounts for 0.4-0.8% of weight of the binding material; the water cement ratio of the concrete is 29-31%; the sand ratio is 33-35%; the volume-weight is 2480-2500kg / m<3>. The rich calcareous material and the rich siliceous material are compounded at a ratio of 1:4 or 1:6; the cement is excited to hydrate for the second time; the early strength is improved; the C80 strength grade requirements can be met by one-time atmospheric pressure steam maintenance for 6 hours; the performances, such as the volume stability, the carbonizing resistance, corrosion of reinforcement, the chloride penetration resistance, the freeze-thaw resistance, the acid corrosion resistance, the salt corrosion resistance and the like of the PHC pipe pile concrete are improved and changed, and the late durability of the concrete is improved.

The invention relates to a silica-calcia low-grade collophanite positive and inverse floatation process, which comprises the steps: 1 silica-calcia low-grade collophanite ores are broken up and grinded to enable phosphate minerals and gangue mineral monomers to dissociate, then are added with water to mix size, enter positive and inverse floatation, get rid of impurities in ores, and improve grade of phosphorite. Compared with the prior art, the silica-calcia low-grade collophanite positive and inverse floatation process has the advantages that the content of only one kind of gangue minerals can be reduced by adopting direct floatation and single inverse floatation, can reduce the contents of silicate minerals, carbonate minerals and iron and aluminum silicate minerals, can obtain low magnesium low power half oxide low silicon phosphate concentrate by adopting the silica-calcia low-grade collophanite positive and inverse floatation process, successfully achieves mineral processing enrichment of collophane calcium collophanite, and can improve use rate of phosphorus resource. The silica-calcia low-grade collophanite positive and inverse floatation process overcomes the defects that an existing floatation process can not be applied for mineral processing of silica-calcia collophanite which is high in content of high power half oxides.

A method to produce a series of ferrotitanium by smelting the titanium material in Panxi area. The technology steps are as following: the titanium material in Panxi area, calcareous metallurgy accessories and calcium-sodium treatment reagent will be delivered into the revolving burner, they will be warm-up fast, and then will be delivered into blendor by connecting barn to be uniformly mixed. And then aluminium, iron system material, auxiliary reducers and potassium chlorate will be orderly added in from the batch bin, when the material and the auxiliary material in the blendor have been uniformly mixed, they will drop into the smelting furnace, which has been warmed up, by the connecting barn, the igniter will be added in, and the inhibiting agent will be added when the reaction get over for about 2-3 minutes, they will be cooled for 20-40h, and at last the residue and the ferrotitanium will be separated. The ferrotitanium product will enter warehouse after being checked and paclaged. The material source of this patent is assured, and the production technology is on the safe side, the product quality of the ferrotitanium made by it is stable, and it fulfills the different needs of all kinds of steel industry, so it the myth that the Panxi vanadium-titinium magnetite can not produce high ferrotitanium because the impurity of it is high, and it fills up the blank in our country.