151 results about "Calcium formate" patented technology

The invention belongs to the technical field of nanocrystal nucleus early strength agents, and provides a damp and hot nanocrystal nucleus early strength agent, a tailing solidification filling material and a preparation method and application of the damp and hot nanocrystal nucleus early strength agent and the tailing solidification filling material. The invention discloses a molybdenum ore tailing slurry which is prepared from the following raw materials in parts by weight: 1 part of Portland cement, 4 to 6 parts of molybdenum ore tailings, 0.06 to 0.1 part of zeolite powder, 0.07 to 0.1 part of nanoscale attapulgite powder, 0.06 to 0.1 part of gamma-glycidyl ether oxypropyl trimethoxy silane, 0.03 to 0.1 part of potassium silicate, 0.04 to 0.1 part of sodium hydroxide, 0.06 to 0.1 part of calcium formate, 0.04 to 0.1 part of lithium metaaluminate and 1.25 to 1.75 parts of water. According to the technical scheme, the problem that a filling body prepared from an early strength agent in the prior art is low in early and later strength is solved, and meanwhile, the early strength agent is simple and convenient in preparation mode, low in cost and wide in application range.

The invention discloses a basalt fiber reinforced ceramic tile binder and a preparation method thereof, and belongs to the technical field of ceramic tile binders. The basalt fiber reinforced ceramic tile binder is prepared from the following raw materials in parts by weight: 30 to 35 parts of cement, 40 to 50 parts of quartz sand, 1 to 2 parts of basalt fiber, 5 to 8 parts of calcium formate, 1 to 3 parts of redispersible latex powder, 1 to 1.5 parts of organic silicon modified polyurethane and 0.2 to 0.5 part of cellulose ether. The basalt fiber reinforced ceramic tile binder prepared by the invention has the advantages of relatively low slippage distance, good tensile bonding strength, water resistance, high temperature resistance and freeze thawing resistance stability.

The invention relates to the field of safety monitoring, and particularly discloses a calcium formate production process safety monitoring method and system, which utilize a distributed control system to collect original production data, and ensure time consistency of all monitoring variables through data synchronization processing, thereby laying a foundation for subsequent analysis. Thirdly, performing feature engineering processing on the synchronized data, extracting features such as short-term and medium-term change rates, moving average values and standard deviations of temperature, pressure and stirrer current, constructing state features of the reaction kettle, and capturing dynamic operation information of the system; in order to predict potential risks, a trend prediction model based on deep learning is adopted, a historical temperature sequence is converted into a future temperature trajectory, and prospective pre-judgment on the temperature trend is provided; meanwhile, the current system health condition is evaluated in combination with a state recognition model, the risk level is determined through a decision tree model according to the abnormal score and the predicted temperature maximum value, and graded early warning is achieved.

The invention provides bridge concrete for extremely cold areas. The bridge concrete is prepared from the following raw materials in parts by weight: 320 to 400 parts of P.O 42.5-grade Portland cement, 9 to 16 parts of a composite anti-freezing agent, 12 to 22 parts of surface modified nano silicon dioxide, 85 to 130 parts of a mineral composite admixture, 950 to 1250 parts of aggregate, 0.7 to 1.6 parts of a polycarboxylic acid type air entraining agent and 1.8 to 5.5 parts of polypropylene fiber, wherein the composite anti-freezing agent is formed by compounding calcium nitrate, calcium formate and triethanolamine according to the ratio of (3.2-5.1): (1.9-4.2): 1, and the effective content of Ca (NO3) 2.4 H2O in the calcium nitrate is greater than or equal to 96%. Compared with the prior art, the composite anti-freezing agent has the following beneficial effects that the calcium nitrate provides early-stage anti-freezing, the calcium formate accelerates low-temperature hydration, and the triethanolamine serves as a dispersing agent to improve the synergistic efficiency of all the components.

The invention relates to a coal gangue-based temperature control and humidity control material for 3D printing and a preparation method thereof, two wastes of coal gangue and camellia oleifera shells are taken as main raw materials, the purpose of treating wastes with wastes is realized, the concept of circular economy is met, and the cost is low. Rapid hardening is achieved through calcium formate, rheology controllability is achieved through a rheology modifier, and the core problems of the 3D printing material in the aspects of printability and early strength are successfully solved. The functions of temperature control (phase change microcapsules) and humidity regulation (air entraining-fiber porous system) are integrated in a printing material, so that a printed building component becomes an intelligent environment regulator. Due to the addition of the camellia oleifera shell fibers, humidifying is assisted, the reinforcing and toughening effects are achieved, and the integrity and long-term durability of a printed component are improved.

The invention discloses a cement mortar reinforcing agent and a preparation method thereof, relates to the field of cement mortar reinforcing agents, and is characterized in that the limit ranges of the DEAIPA dosage (15-20 parts), the titanate coupling agent hydrolysis time (3-5 hours) and the main mixing reaction temperature (60-70 DEG C) are controlled. A titanate coupling agent is hydrolyzed at specific pH and temperature until the conversion rate of-SiOR groups is high, sodium polyacrylate adsorbs sodium bicarbonate to form CO2-loaded microspheres, then the CO2-loaded microspheres are mixed and reacted with raw materials such as calcium formate and DEAIPA at limited temperature, and finally the reinforcing agent is prepared. Ten groups of contrast experiments are designed for verification: 1-5 groups are conventional groups with parameters within a limited range, 6-9 groups are control groups with parameters exceeding the range, and 10 groups are traditional raw material blank groups. Experiments show that the 3-day / 28-day compressive strength and the total shrinkage rate of a conventional group are remarkably superior to those of an out-of-range group and a blank group, a nonlinear relation exists in the synergistic effect of parameters, and it is proved that the limited range has practical significance for improving the mechanical property and the crack resistance of the low-clinker cement.

The invention discloses a compound feed for weaned piglets and a preparation method thereof, relates to the technical field of feeds, and solves the problems of high stress, low food consumption, slow weight gain, intestinal damage, high diarrhea rate and low survival rate of weaned piglets. Each ton of compound feed for weaned piglets comprises the following raw materials: corn, broken rice, soybean meal, super steam fish meal, extruded soybeans, fermented soybean meal, peanut meal, flour, whey powder, glucose, white sugar, soybean oil, linseed oil, coconut oil, calcium formate, calcium hydrophosphate, amino acid, a vitamin additive, a trace element premix, composite dietary fibers, auxiliary materials and the like. The feed additive can improve the feed intake of piglets, protect the intestinal health of the piglets, enhance the immunity, relieve the weaning stress of the piglets, reduce the incidence rate of diarrhea and disease of the piglets and improve the weight gain rate of the piglets.

The invention discloses a method for preparing flow-state solidified soil by utilizing high-liquid-limit mucky shield muck, which comprises the following steps: firstly, preparing a composite curing agent by adjusting the formula proportion of industrial byproducts including carbide slag, slag, fly ash and phosphogypsum as well as calcium formate and sodium hexametaphosphate; secondly, the shield muck is pretreated, and pretreated slurry meeting the requirement is obtained; and finally, a composite curing agent is added into the pretreated slurry, the water content of the mixed slurry is controlled to be 130-160%, all components in the composite curing agent and the pretreated slurry are subjected to full contact reaction through stirring, and therefore the fluid-state solidified soil meeting the backfilling requirement is obtained. Calcium formate and sodium hexametaphosphate are introduced into a traditional industrial by-product curing agent formula, the rheological property of the slurry is dynamically regulated and controlled, and harmless treatment and resource utilization of the waste resource high-liquid-limit mucky shield muck are achieved.

The invention belongs to the technical field of building materials, and provides an early-strength cement-based grouting material and a preparation method thereof.The early-strength cement-based grouting material is prepared from, by weight, 500-600 parts of sulphoaluminate cement, 200-300 parts of Portland cement, 40-100 parts of lithium slag, 1-3 parts of a coagulant, 0.5-1 part of an early strength agent, 5-8 parts of a water reducing agent, 0.5-2.5 parts of a thickening agent, 0.3-0.9 part of a defoaming agent and 260-310 parts of water; the coagulant is sodium metaaluminate and / or potassium metaaluminate; the early strength agent is selected from one or more than two of lithium carbonate, lithium sulfate, calcium formate, calcium acetate, calcium propionate, calcium butyrate and nano silicon dioxide. According to the technical scheme, the problems of poor dispersion resistance and low early strength of a cement-based grouting material in a flowing water environment in the prior art are solved.

This invention discloses a crude calcium formate crystallization system, relating to the field of chemical inorganic salt preparation technology. It includes several reaction vessels, a transfer tank, a purification system, a centrifuge, a concentration system, and a high-level tank. The reaction vessels, transfer tank, centrifuge, filter, and high-level tank are interconnected. Each reaction vessel has a first overflow hole at the top of its side wall. Each reaction vessel is connected to a calcium carbonate supply device and a formic acid supply device. The concentration system includes an evaporation device, a hot air distributor, and a hot air furnace. The purification system includes an overflow tank and a filter press. Each overflow tank has a second overflow hole at the top of its side wall. Each first overflow hole is connected to the overflow tank via an overflow pipe, and each overflow pipe is equipped with an overflow valve. The second overflow hole is connected to the filter press via a pipeline, and the filter press is connected to the evaporation device. The overflow tank is connected to the transfer tank, and a movable sealing plate is provided at the bottom outlet of the overflow tank. This invention can solve the problems of difficult impurity separation, resource waste, high energy consumption, and poor crystallization quality in traditional preparation processes.

The invention relates to the technical field of solid waste resource recycling, in particular to a curing agent for waste soil treatment and a preparation method and application thereof. The curing agent for waste soil treatment is prepared from the following raw materials in parts by weight: 30 to 40 parts of carboxyl-terminated hyperbranched polyester, 2 to 4 parts of calcium formate, 25 to 35 parts of polyacrylamide, 7 to 13 parts of hydroxypropyl methyl cellulose, 2 to 4 parts of calcium stearate, 8 to 12 parts of potassium carbonate, 2 to 6 parts of sodium hydroxide, 3 to 5 parts of organic silicon defoaming agent and 8 to 12 parts of organic bentonite. The method has the advantage that the solidification effect of the waste soil with high water content is improved.

The invention belongs to the field of building materials, and particularly relates to an anhydrous gypsum-based terrazzo floor material and a preparation method thereof. The anhydrite-based terrazzo floor material is prepared from the following raw materials: anhydrite, quenched stone, building gypsum, ash calcium, potassium sulfate, calcium formate, a water reducing agent, a defoaming agent, rubber powder and hydroxypropyl methyl cellulose. The invention relates to a building material, which is prepared from the following raw materials in parts by weight: 525 to 550 parts of anhydrite, 350 to 450 parts of quenched stone, 30 to 40 parts of building gypsum, 15 to 20 parts of ash calcium, 4 to 7 parts of potassium sulfate, 0.5 to 0.8 part of potassium acid calcium, 1.5 to 2.0 parts of water reducing agent, 0.4 to 0.6 part of defoaming agent, 0.10 to 0.15 part of hydroxypropyl methyl cellulose and 6 to 8 parts of rubber powder. The anhydrous gypsum-based terrazzo floor material is high in early strength and low in cost compared with a cement-based inorganic terrazzo in a construction period. The development of companies is facilitated, and the product is more competitive in the market.

The present application relates to the technical field of binder, in particular to a kind of anti-layering light super-flexible rock plate binder and preparation method thereof.The anti-layering light super-flexible rock plate binder includes the following raw materials by weight parts:portland cement 25.0-32.0 parts,sulfoaluminate cement 2.4-3.0 parts,heavy calcium 5.0-8.0 parts,ceramsite sand 35.0-60.0 parts,toughness resin sand 5.0-10.0 parts,dry powder anti-layering wetting additive 1.0-2.0 parts,calcium formate 0.5-1.0 parts,suspension stabilizer 0.2-0.5 parts,fumed silica 0.1-0.4 parts,bonding enhancer 0.5-1.0 parts,powder dispersant 0.08-0.2 parts,cellulose ether 0.34-0.4 parts,redispersible emulsion powder 6.0-10.0 parts,starch ether 0.05-0.1 parts,wood fiber 0.4-0.8 parts.The anti-layering light super-flexible rock plate binder has low bulk density and dry density, in addition, it also has the characteristics of high bonding strength, low elastic modulus and good flexible anti-cracking performance.

The invention discloses a material for improving impervious and self-healing functions of concrete and a preparation method of the material. The material is prepared from 8-10 parts of polypropylene fibers, 30-35 parts of a magnesium expansion material, 30-35 parts of an active low-carbon cementing material, 10-15 parts of a mineral admixture active exciting agent, 3-5 parts of sodium carbonate, 1-2 parts of calcium formate, 3-5 parts of a catalyst and 1-2 parts of a penetration enhancer. The polypropylene fiber is monofilament or reticular modified polypropylene fiber, the length is 6-19mm, and the diameter is 18-48; the active low-carbon cementing material is one or more of granulated blast furnace slag micro powder or I-grade fly ash; the catalyst is an aluminate compound and is used for accelerating the reaction process of active substances, calcium ions and water. The water penetration resistance of the concrete is remarkably improved by exciting the activity of the active low-carbon cementing material in the concrete, pores and cracks in the concrete can be effectively filled, and the self-repairing and healing capacity of the concrete is improved.

The invention relates to the technical field of chemical production, and provides a gypsum-based inorganic cementing material and a preparation method and application thereof.The gypsum-based inorganic cementing material is prepared from, by mass, 30%-50% of anhydrous gypsum, 20%-30% of semi-hydrated gypsum, 5%-10% of quick lime and 5%-30% of aluminum sulfate or alums, and the sum of the mass percentages of all the components is 100%. Calcium formate or calcium nitrate accounts for 5-10%, copperas accounts for 0-10%, and sodium metaaluminate accounts for 0-10%. According to the gypsum-based inorganic cementing material as well as the preparation method and the application thereof provided by the technical scheme, the core technical bottleneck of environmental problems caused by massive stockpiling of industrial byproduct gypsum and poor water resistance of products is effectively solved, and high-added-value resource utilization of the industrial byproduct gypsum is realized.

The invention relates to the field and particularly discloses multifunctional marble dry-mixed mortar which is characterized by comprising cement, marble, an expanding agent, a water reducing agent, rubber powder, a water repellent, a stabilizer, calcium formate, a defoaming agent and fibers. The dry-mixed mortar has the advantages that the marble is adopted to replace sand to serve as aggregate and is reasonably matched with the cement, the rubber powder, the fibers, the calcium formate, the expanding agent, the water repellent and the like, the obtained dry-mixed mortar keeps a stable structure in a low-temperature environment, and the service life is prolonged; high flexibility and tensile strength are achieved, and cracks can be reduced; the marble adopts continuous grading and is matched with the water repellent, the stabilizer and the like, so that gaps in the mortar can be effectively filled, a compact waterproof structure is formed, moisture permeation is prevented, and the mortar has better applicability in a humid environment or a part with a waterproof requirement.

The invention relates to a method for creating an excavation on a construction site and subsequently backfilling it using the excavated soil obtained during the creation process, containing 1 to 15 wt.% organic matter, wherein the excavated soil is mixed with limestone flour, an activator selected from calcium formate, calcium acetate and / or calcium aluminate, water and a hydraulic binder to obtain a temporarily flowable, self-compacting backfill material (ZFSV), wherein the amount of activator is adjusted to the proportion of organic matter in the excavated soil.

The present invention provides an early strength material comprising calcium formate powder, wherein, in the volume cumulative particle size distribution of the calcium formate powder determined by laser diffraction scattering method, 90% of the particles have a particle size (D90) of less than 1200 μm.

The invention discloses an anti-freezing flexible fire preventing and extinguishing spraying material for the surface of a strip mine coal seam and a preparation method thereof.The anti-freezing flexible fire preventing and extinguishing spraying material for the surface of the strip mine coal seam is prepared from a component A, a component B and a component C. The component A is prepared from, by mass, 16-25% of styrene-acrylic emulsion, 0.2% of 702 antioxidant and the balance water; the component B comprises 4-15% of polyvinyl alcohol, 3-5% of polyacrylamide, 1-3% of magnesium chloride and the balance of water; and the component C comprises 50-60% of Portland cement, 20-25% of fly ash, 10% of calcium formate, 4% of sodium carboxymethyl cellulose and 1% of ammonium polyphosphate. The spraying material disclosed by the invention is good in ductility, the elongation rate exceeds 30%, and the spraying material has a very good sealing and oxygen isolating effect on the open-pit mine step slope exposed coal seam, so that a film with cohesiveness and flexibility is formed.

The invention discloses a preparation method of a rapidly-solidified micro-expansion mining filling material and a continuous filling process, and relates to the technical field of filling materials. The preparation method comprises the following steps: mixing cement, gypsum, an early strength agent, an accelerator, an expanding agent, calcium formate, sodium gluconate and polypropylene fibers to obtain a mixed dry material; mixing the mixed dry material with water to obtain slurry; foam generated by foaming liquid through foaming is introduced into the slurry, and foam concrete slurry is obtained; and molding and curing the foam concrete slurry to obtain the filling material for the rapid-solidification micro-expansion mine. The quick-setting micro-expansion mining filling material prepared by the invention has excellent water resistance and mechanical properties. In addition, due to the filling effect of the foam and the expansion effect of the expanding agent, the prepared rapid-setting micro-expansion mining filling material further has low density, the demand quantity of the filling material during filling can be reduced, and then the filling cost is reduced.

The invention relates to a high-molecular polymer cement coating for roof waterproofing and a preparation method of the high-molecular polymer cement coating, and belongs to the technical field of waterproof coatings. Wherein the polymer emulsion is prepared from the following raw materials in parts by weight: 40 to 55 parts of acrylate emulsion, 2 to 4 parts of carbon black, 5 to 10 parts of 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 8 to 16 parts of modified fiber and 20 to 35 parts of deionized water; the cement paste is prepared from the following raw materials: 60-75 parts of Portland cement, 10-20 parts of quartz powder, 5-12 parts of ground calcium carbonate, 4-8 parts of cellulose ether, 1-3 parts of calcium formate, 2-6 parts of polycarboxylic acid and 30-35 parts of tap water. The high-molecular polymer cement coating has extremely high tensile strength, impact resistance and cracking resistance, the polymer emulsion and the cement paste are mixed to form an interpenetrating network structure, the high-molecular polymer cement coating has flexibility and weather resistance of an organic polymer and strength and durability of inorganic cement, and the mechanical property, durability and construction performance of the high-molecular polymer cement coating are improved.

This invention discloses a calcium formate drying device, a calcium formate production device, and their operating method, belonging to the field of calcium formate production technology. The calcium formate drying device includes a hot air duct and a normal temperature air duct, both equipped with cyclone separators. A screening device is connected to the outlet of the first cyclone separator, and the screening device is connected to the normal temperature air duct. The calcium formate production device includes a reaction system, a transfer tank, a centrifuge, a mother liquor system, a drying system, and a hot air system. The operating method of the calcium formate production device includes feeding calcium carbonate powder and formic acid into each reaction vessel for mixing and reaction; the reacted material is temporarily stored in the transfer tank, then pumped into the centrifuge for solid-liquid separation; the separated solid calcium formate is dried by the drying system; the separated mother liquor, after impurity removal, is partially reused in the reaction vessel, and the remainder is evaporated in an evaporation vessel. This invention features continuous production, thorough impurity removal, and good energy-saving effects.

The invention discloses a method for preparing cement by using modified lithium slag composite multi-source solid waste, and belongs to the technical field of building materials and solid waste resource utilization. The core of the method is that the lithium slag is subjected to'targeted curing-gradient excitation 'modification: firstly, an aluminum salt solution is adopted for pretreatment, and soluble lithium ions are specifically cured to eliminate the hydration inhibition effect of the soluble lithium ions; then co-grinding with calcined magnesium oxide, and adding sodium silicate and calcium sulfate whiskers step by step for gradient excitation; the modified lithium slag, granulated blast furnace slag, fly ash, Portland cement clinker, desulfurized gypsum / phosphogypsum composite gypsum and the like are subjected to synergistic grinding, then a composite exciting agent composed of solid water glass, triisopropanolamine and calcium formate is added, and the cement is prepared through homogenization. According to the invention, the problem of performance degradation under the condition of high doping amount of the lithium slag is fundamentally solved, the prepared cement has the outstanding advantages of normal coagulation, high strength (especially later strength) and small dry shrinkage, and high value-added resource utilization of the multi-source solid waste is realized.

The invention relates to the technical field of road engineering construction, and particularly discloses a ceramic tile adhesive as well as a preparation method and application thereof. The ceramic tile binder comprises sulphoaluminate cement, gypsum, aggregate, rubber powder, a polymer emulsion, an inorganic additive, a waterproof agent, a water reducing agent, a defoaming agent and an air entraining agent, wherein the inorganic additive comprises palygorskite powder, microcrystalline glass powder, calcium formate and calcium nitrite; the polymer emulsion comprises a water-based acrylate emulsion and an ethylene-vinyl acetate copolymer emulsion. The ceramic tile binder has good water resistance, excellent bonding performance and low temperature resistance, the problems that an existing ceramic tile binder is poor in water resistance, low in bonding strength and poor in low temperature resistance are effectively solved, and a new design thought is provided for design of the ceramic tile binder.

The utility model discloses anti-blocking filtering equipment for processing trimethylolethane, which comprises a filtering box, a bracket is fixedly arranged in the filtering box, and a collecting hopper is fixedly arranged on the bracket and is used for collecting impurity liquid; and the rotatable filter cartridge is arranged in the collecting hopper and is used for filtering a trimethylolethane reaction solution. According to the anti-blocking filtering equipment for trimethylolethane processing, the problem that in the existing trimethylolethane processing process, due to the fact that suspended solids such as sodium formate or calcium formate are prone to being attached and accumulated on the surface of the filter cylinder, the filtering efficiency is reduced is solved.

An oral care composition is disclosed comprising tetracalcium phosphate and a water-soluble calcium source; wherein the water-soluble calcium source comprises calcium chloride, calcium nitrate, calcium acetate, calcium lactate, calcium formate, calcium malate, calcium propionate, calcium butyrate, calcium bicarbonate, calcium glycerophosphate, calcium gluconate, calcium ascorbate, calcium glycinate or mixtures thereof; and wherein the composition is an aqueous composition and the water content is at least 5% by weight of the composition.

The application discloses a kind of concrete for TBM lining in-situ 3D printing and preparation method thereof, belong to civil engineering materials field.It includes by weight parts: 6000 parts cementitious material, 5400-6600 parts quartz sand, 1290-1350 parts water, 0.6-0.9 parts hydroxypropyl methyl cellulose, 24-36 parts polycarboxylic acid water reducing agent, 6-9 parts calcium formate, 12-18 parts xanthan gum, 300-540 parts MgO expanding agent, 75-105 parts polyoxyalkyl alcohol shrinkage reducing agent, 40-80 parts steel fiber, 120-180 parts Fe3O4 nanoparticles.The cementitious material is mixed by Portland cement and sulphoaluminate cement, and the mass ratio is 1:(0.67-1.5).The concrete has low water-binder ratio, excellent extrudability, fast initial setting and high early strength, and can realize continuous, high-strength and integrated in-situ 3D printing construction of TBM tunnel lining.

Provided is a concrete composition containing a binder, a curing accelerator for a hydraulic material, and water, wherein: the binder content is 300 kg / m3 or more; the water-binder ratio is 55% or less; the added amount of the curing accelerator for a hydraulic material is 1-50 kg / m3; and the curing accelerator for a hydraulic material contains 20.0-80.0 mass% of calcium formate, 15.0-70.0 mass% of an inorganic calcium compound, and 0.5-30.0 mass% of an inorganic sulfate excluding calcium sulfate.