51 results about "Dry basis" patented technology

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

A method for accurately and efficiently desodium of high-sodium coal, comprising the following steps: detecting the moisture M of the high-sodium raw coal to be treated t , calculating the total sodium content M of the wet basis coal sample Na , converting the total sodium content M of the dry basis coal sample Na , determining the Na2O content in the ash of the high-sodium raw coal to be treated; selecting the key factors affecting the desodium rate; establishing the relationship model between the key factors and the actual desodium rate; according to the Na2O content in the ash and the requirements of the standard, the desodium rate of the high-sodium raw coal to be treated is converted, and the Re target value is obtained; the Re target value is brought into the relationship model, and the selection and value of the key factors of the high-sodium raw coal to be treated during desodium treatment are obtained respectively, and finally the actual leaching desodium of the high-sodium raw coal to be treated is carried out to obtain low-sodium coal meeting the requirements. The method can accurately desodium, reduce cost, energy consumption and corrosion and pollution generated in the production process, and has important significance for guiding large-scale application of high-sodium coal desodium.

The invention discloses a process for reducing rare earth loss in value adjustment of phosphorus-containing rare earth feed liquid by using an iron phosphorus removal and segmented value adjustment method, and belongs to the field of rare earth hydrometallurgy. The process comprises the following steps: preparing iron, heating, adding carbon for material settling, controlling REO concentration, performing primary value adjustment, performing solid-liquid separation, performing secondary value adjustment and performing solid-liquid separation again. The method comprises the following steps: adding an iron material of which the stoichiometric ratio is 1-2 times that of a phosphorus-containing rare earth feed liquid into the phosphorus-containing rare earth feed liquid, raising the temperature to 50 DEG C or above, adding a carbon precipitation material to regulate the acidity to 0.1-0.6 mol / L, controlling REO to be less than or equal to 200g / L, regulating the pH to 0.5-2, carrying out primary phosphorus removal, separating to obtain iron phosphate slag with low rare earth content, and regulating the pH of clear liquid to 4-5 to further remove impurities; according to the method, the rare earth content in the value-adjusted slag is remarkably reduced, the dry basis CeO content of the primary value-adjusted slag can be as low as 1.61%, the rare earth yield is increased, the occupied area of a slag warehouse is reduced, recycling of phosphorus resources is achieved, and the production cost is reduced.

The present invention relates to a process for the decarbonation of limestone, dolomite or other carbonated materials, said process comprising calcining particles of carbonated materials (6) in a reactor (8) of a first circuit (2) up to a temperature range in which carbon dioxide contained in the particles of carbonated materials (6) is released to obtain particles of decarbonated materials (16) and setting the dioxygen content supplied to the reactor (8) such that a first gas (14) exiting the reactor (8) and circulating in the first circuit (2), comprises at least 40% of CO2 by volume on a dry basis and less than 60% of CO2 by volume on a dry basis, while operating the reactor (8) under nominal condition, in particular non-starting condition.

The invention discloses a cassia seed anthraquinone extraction process parameter optimization method based on machine learning, particularly relates to the field of medicinal material extraction processes, and is used for solving the problem that the same group of extraction process parameters are difficult to stably reuse due to fluctuation of different batches of cassia seed raw materials. The method comprises the following steps: by taking a dry basis free anthraquinone content index as a unique batch characterization parameter, retrieving a batch similar sample set to generate an initial parameter group, performing short-time probe extraction under the initial parameter group, collecting a primary stage sample solution, calculating a dry basis release to miscellaneous peak ratio, and comprehensively analyzing to obtain a net release coefficient; an optimization mode mark is generated according to the net release coefficient to limit a process window and operable rule strength, then a regression prediction model is trained in the limited window to output a target parameter set, an executable target parameter set is determined, and stability and reusability of process parameter optimization are achieved.

The invention discloses tailing-based autoclaved aggregate as well as a preparation method and application thereof, and belongs to the technical field of building materials. The tailing-based autoclaved aggregate is prepared from the following raw materials in percentage by mass based on the total weight of the dry basis of the aggregate: 66-70% of composite tailing powder, 21-25% of calcium-based solid waste and 5-9% of a composite adhesive, wherein the composite tailing powder is composed of iron tailings and gold tailings according to the mass ratio of 3: 4-1: 1, the composite adhesive comprises calcium sulfate dihydrate, hydroxypropyl modified starch and sodium polyacrylate, and the mass ratio of the three components is (3-6): (1-1.5): (1-1.5). The coarse aggregate for the concrete is prepared by compounding the gold tailings and the iron tailings together and adopting the composite adhesive composed of the calcium sulfate dihydrate, the hydroxypropyl modified starch and the sodium polyacrylate through the static pressure molding and autoclaved curing process, so that the problem that in the prior art, when tailing slag is adopted as the concrete aggregate, the coarse aggregate is not easy to deform can be effectively solved. And the strength and durability of the concrete cannot be ensured.

This invention, entitled "A Method for Detecting Raw Calcium Carbide in Calcium Carbide Slag," belongs to the field of chemical analysis and testing technology. The technical problem to be solved is that existing technologies suffer from poor accuracy in gas volume measurement, complex equipment, low safety, and inaccurate measurement results due to carbon dioxide interference. The key points of the technical solution are: taking a dry calcium carbide slag sample and determining its initial mass M0; drying the sample to constant weight under an inert atmosphere and determining its dry basis mass M1; mixing the sample with water under an inert atmosphere to react completely with residual calcium carbide; drying the mixture to constant weight under an inert atmosphere and determining its post-reaction mass M2; and calculating the residual calcium carbide content in the sample based on the mass difference between the dry basis mass M1 and the post-reaction mass M2, combined with the stoichiometric relationship of the reaction between calcium carbide and water.

The invention relates to the technical field of clean utilization of coal, in particular to a method for preparing high-concentration gasified coal water slurry from full coal slime and a special composite additive. The composite additive is formed by compounding a dispersing agent and a stabilizing agent according to the mass ratio of 1: 1-2: 1, the dispersing agent comprises sodium lignin sulfonate, sodium poly (naphthaleneformaldehyde) sulfonate and sodium polystyrenesulfonate, and the stabilizing agent comprises polyvinyl alcohol, polyacrylamide and carboxymethyl cellulose. The preparation method comprises the following steps: grading coal slime, and mixing with water; performing ultrasonic treatment on the slurry; and adding the composite additive accounting for 0.2-0.5% of the mass of the dry basis coal slime, and stirring to obtain the coal slime. Through the synergistic effect of ultrasonic treatment and the composite additive, the contradiction between high viscosity and poor stability during slurry forming of the coal slime is solved, and the prepared coal water slurry is high in concentration (greater than or equal to 64%), low in viscosity (600-1200 mPa.s) and good in stability (72 h drainage rate lt: 5%), and is particularly suitable for gasification raw materials.

The invention relates to the technical field of adsorption detection, and discloses an imidazolium resin adsorption kinetic parameter online identification method and system.The method comprises the steps that 1, flow, inlet and outlet water concentration, conductivity, temperature and pH value are synchronously collected, and apparent ion strength is obtained through the conductivity; step 2, performing mass balance based on the flow, the inlet and outlet water concentration and the resin dry basis mass to obtain a real-time track of the average adsorption capacity of the resin; step 3, constructing counter-ion coupling isothermal driving force and screening a quasi-balance section; 4, solving isothermal coupling parameters by combining a quasi-balance relational expression; 5, calculating an overall mass transfer coefficient point by point; step 6, simultaneously solving an outer membrane mass transfer proportionality coefficient and an in-hole mass transfer coefficient under two levels of flow; and step 7, constructing a core parameter group and outputting a consistency judgment result identifier. According to the method, online identification and consistency judgment of the adsorption thermodynamic parameters and the mass transfer kinetic parameters of the imidazolium resin are realized.

A manufacturing method for a starch-containing composition that is not prone to collapsing shape in a liquid during heat cooking, is highly lusterless, and has excellent appearance which utilizes an extruder including a feeder for loading a food material and a die for discharging the food material after kneading and shaping. The screw has a first flight, a kneading, and a second flight section, and the barrel has a bend section at the first-half of the second flight section of the screw. A composition containing at least 3.0 mass % insoluble dietary fiber, at least 10.0 mass % starch, at least 3.0 mass % protein, and a dry-basis water content of at least 25 mass % is prepared.; The composition is then heated under pressure, kneaded, and depressurized until the degree of gelatinization is lowered by at least 6 mass %.

The invention discloses a road base material prepared from industrial waste and construction waste and a preparation method of the road base material, and belongs to the technical field of building materials. The material is prepared from recycled aggregate and an industrial waste residue-based cementing material, the recycled aggregate is formed by mixing building demolites and decoration wastes according to the mass ratio of 7: 3 and grading the mixture into a continuous particle size of 5-30 mm; the industrial waste residue based cementing material is formed by mixing and grinding 40-55% of nickel slag, 20-30% of refining slag, 15-20% of carbide slag and 10% of phosphogypsum, and the specific surface area is larger than or equal to 450 m < 2 > / kg. During preparation, the recycled aggregate, the cementing material and polyaluminum chloride accounting for 0.5-1.5% of the dry basis mass of the cementing material are subjected to dry mixing, water accounting for 9-11% of the total mass of the solid raw materials is added for wet mixing, and then compaction and maintenance are performed to obtain a finished product. According to the invention, cement is completely replaced by industrial waste residue, and natural aggregate is replaced by construction waste, so that efficient resource utilization of solid waste is realized; the obtained material has the advantages of high early strength, small dry shrinkage, good freezing resistance and low cost, and completely meets the requirements of road base engineering.

The invention provides a preparation method of infant rice flour. The preparation method comprises the following steps: crushing rice and sieving to 100 meshes; the preparation method comprises the following steps: weighing a rice flour base material with a certain dry basis mass, adding distilled water to prepare slurry with a substrate concentration of 20-40%, pre-gelatinizing for 10-15 minutes, putting into a water bath of 45-65 DEG C, adding alpha-amylase when the temperature of the slurry is reduced to a set value, magnetically stirring for 25-40 minutes, and deactivating enzyme at 85-95 DEG C for 10-15 minutes to obtain an enzymolysis sample; and diluting the sample until the substrate concentration is 20%, and controlling the water content of the product to be 4-6% by adopting a spray drying mode to obtain the infant rice flour. The starch structure is regulated through enzymolysis, and an efficient drying process is combined, so that the solubility, the reconstituability and the digestibility of the rice flour are remarkably improved, the taste and the dispersity are improved, and the preparation method is suitable for processing infant nutritional foods.

The invention belongs to the technical field of blast furnace ironmaking, and relates to an iron ore value evaluation method, which specifically comprises the following steps: taking dry iron ore actually used in production as a reference material, determining the content of each chemical component in to-be-evaluated iron ore and the reference material, and evaluating the value of the iron ore according to the chemical component difference between the to-be-evaluated iron ore and the reference material. According to the evaluation method provided by the invention, the whole-process cost elements are integrated, the quantitative evaluation model based on the component difference is established, the evaluation method fits actual production and operation, a scientific basis is provided for the addition amount of the flux and the fuel, an expected reference is provided for the recovery of the slag and the coal gas, and the method has a wide application prospect.

The application provides a seabuckthorn pomace multi-step extraction and drying parameter optimization method based on mixed integer programming, and relates to the technical field of agricultural product deep processing. The method first obtains the process parameters of seabuckthorn pomace after pretreatment, the initial dry basis moisture content and the initial target active ingredient content; based on the pretreatment parameters, the mass transfer intensification factor and the structural thermal stability coefficient are calculated through a physical property mapping model; then, combined with the preset final product target active ingredient retention rate, a mixed integer programming model is constructed to minimize the weighted sum of the total drying time and energy consumption, the model is solved, and the optimal drying process protocol is generated; finally, drying is performed according to the protocol, and whether the final product moisture and target active ingredient retention rate meet the standards are verified. The application realizes the co-optimization of the pretreatment-drying whole process, significantly improves the retention rate of heat-sensitive components while ensuring the drying efficiency, and provides an intelligent technical solution for high-value utilization of seabuckthorn pomace.

This invention provides processes and systems for converting biomass into high-carbon biogenic reagents that are suitable for a variety of commercial applications. Some embodiments employ pyrolysis in the presence of an inert gas to generate hot pyrolyzed solids, condensable vapors, and non-condensable gases, followed by separation of vapors and gases, and cooling of the hot pyrolyzed solids in the presence of the inert gas. Additives may be introduced during processing or combined with the reagent, or both. The biogenic reagent may include at least 70 wt %, 80 wt %, 90 wt %, 95 wt %, or more total carbon on a dry basis. The biogenic reagent may have an energy content of at least 12,000 Btu / lb, 13,000 Btu / lb, 14,000 Btu / lb, or 14,500 Btu / lb on a dry basis. The biogenic reagent may be formed into fine powders, or structural objects. The structural objects may have a structure and / or strength that derive from the feedstock, heat rate, and additives.

This invention discloses a multi-parameter linkage control method for the extraction stage of Coix seed oil, belonging to the field of Coix seed oil extraction technology. Specifically, it includes: collecting the cumulative flow rate of solvent entering and leaving the extraction tank and calculating the real-time solvent holding amount; collecting the overall weight of the extraction tank, subtracting the empty weight and solvent holding amount to obtain the real-time dry basis weight; collecting the absorbance of the extract and multiplying it by the solvent holding amount, inputting it into a dissolution quality prediction model to obtain the predicted value of the dissolved Coix seed oil quality, and then calculating the predicted dissolution rate; when the real-time dry basis weight is greater than the lower limit threshold of dry basis weight and the predicted dissolution rate is less than the lower limit threshold of dissolution rate, calculating the change in solvent holding amount, and discharging or replenishing solvent according to the positive or negative change, until the solvent holding amount recovers and the predicted dissolution rate is recalculated; repeating the above steps until the real-time dry basis weight is less than or equal to the lower limit threshold of dry basis weight, and then discharging the residue. This invention achieves dynamic adjustment of solvent holding amount, avoids starch gelatinization, and improves the extraction rate.

The invention belongs to the technical field of solid waste recycling and soil improvement, and relates to a method for preparing a saline alkali soil conditioner from sludge composted materials, which comprises the following steps: firstly, adding 0.1-0.2% of calcium acetate into lignocellulose pre-hydrolysate, precipitating to remove macromolecular lignin which is easy to cause surface precipitation, and then adding the calcium acetate into the lignocellulose pre-hydrolysate; the modified eluting agent rich in micromolecular hydrophilic lignin and organic acid is obtained; then, mixing the eluting agent with sludge composted materials according to a liquid-solid ratio of (3-5): 1 for leaching, and synchronously and efficiently removing heavy metals and soluble salts; after leaching, carrying out solid-liquid separation to obtain a purified composted material; and finally, compounding the compound with desulfurized gypsum and humic acid according to a dry basis mass ratio of (30-50): (20-40): (10-30), aging and granulating to obtain the saline alkali soil conditioner. The method treats wastes with wastes, is low in cost, can deeply remove heavy metals and salts, can obviously reduce the pH value of soil, improves organic matters, promotes plant growth, and realizes the dual goals of safe utilization of sludge and improvement of saline-alkali soil.

The invention relates to the technical field of carrier preparation, and discloses a preparation method of an alumina carrier and the alumina carrier prepared by the preparation method. The method comprises the following steps: mixing pseudo-boehmite with water, an extrusion aid and a peptizing agent, molding, and then carrying out first drying and roasting; the mass ratio of H to A is 0.5-1, and the mass ratio of H to A is equal to (the mass of water + the mass of pseudo-boehmite * (1-the dry basis coefficient of pseudo-boehmite)-the mass of pseudo-boehmite * the dry basis coefficient of pseudo-boehmite * the pore volume of pseudo-boehmite) / (the mass of pseudo-boehmite * the dry basis coefficient of pseudo-boehmite * the pore volume of pseudo-boehmite); the M / N mass ratio is 1.5-6%, and the M / N mass ratio is equal to (the mass of the peptizing agent * the concentration) / (the mass of the pseudo-boehmite * the dry basis coefficient of the pseudo-boehmite) * 100%. The method has the advantages of simple process, easy control of operation conditions, easy industrial implementation and low cost, and can be used for preparing the alumina carrier with high pore distribution concentration ratio.

The application relates to the technical field of coal sample analysis, in particular to a method and device for determining a critical difference of 3mm storage and inspection coal sample inter-laboratory comparison, wherein the method comprises the following steps: taking a dry basis as a reference, respectively determining detection difference values of 0.2mm analysis samples prepared by a sending laboratory and a receiving laboratory, and calculating a 1.2T value according to detection items and index ranges, wherein T is a reproducibility critical difference specified in a corresponding detection standard; and comparing the detection difference values with the 1.2T value, wherein if the detection difference value is less than or equal to the 1.2T value, it is determined that the 3mm storage and inspection coal sample inter-laboratory comparison is qualified, otherwise, it is determined that the 3mm storage and inspection coal sample inter-laboratory comparison is unqualified. Therefore, the method solves the problems that related technologies use a square root of 3T as a critical difference of 3mm storage and inspection coal sample inter-laboratory comparison, the allowed range is widened, most of the comparison samples can pass the determination, and the sensitivity of the comparison result to detection abnormalities and quality fluctuations is reduced.

This invention relates to the field of metallurgical pelletizing technology, and discloses a method for batching highly reducible pellets based on secondary iron-bearing resources. The method includes the following steps: 80.0 to 84.77 parts by weight of secondary iron-bearing resources, 13.0 to 16.25 parts by weight of iron concentrate, and 1.5 to 2.5 parts by weight of light-calcined magnesia are mixed at high shear to obtain a mixed dry powder; the mixed dry powder is fed into a pelletizer, and a calcium-boron double-crosslinked lignin hydrosol containing 0.73 to 1.25 parts by weight of dry basis components is sprayed to obtain green pellets; the green pellets are then sequentially subjected to hot air flow drying, preheating treatment, and solid-phase roasting to obtain pellets, which are then cooled. In this invention, the hydrosol forms a physical barrier layer at the interface of the light-calcined magnesia particles, slowing down the penetration of free water molecules into the interior and inhibiting the volume expansion caused by magnesia hydration; the residual boron ions from solid-phase roasting decompose into the iron mineral crystals penetrate into the interior, causing lattice distortion and reducing the reduction activation energy.

The invention discloses a comprehensive evaluation method for the cost performance of an acidic material added to a blast furnace, which comprises the following steps: step 1, obtaining the TFe, SiO2 and CaO contents of the acidic material, the non-tax price and dust content of a dry basis to a factory, the corresponding components and the non-tax price of sintered ore, coke and pulverized coal, and the corresponding components and the non-tax price of the sintered ore, the coke and the pulverized coal; the blast furnace ore consumption, the coke ratio, the coal ratio, the coke return end ratio, the processing cost, the slag binary alkalinity, the desulfurization CaO consumption and the molten iron reduction SiO2 consumption are controlled; step 2, substituting acidic material parameters into a furnace charge structure, adjusting the proportion, keeping the binary alkalinity of furnace slag unchanged, and calculating the net charging price, the charging comprehensive grade and the theoretical ore consumption; 3, accounting iron-containing material, fuel and processing cost according to a cost model, and summing to obtain pig iron cost; and 4, repeating the step 2 to the step 3, and sequencing according to the pig iron cost from low to high. According to the method, the limitation of a traditional ton price method is overcome, comprehensive evaluation on the cost performance of the acid material is achieved, and furnace burden optimization, cost reduction and benefit improvement are facilitated.

The application discloses a kind of active carbon adsorption saturation degree test methods, comprising the following steps: according to the dry base volatile content of test active carbon sample, determine the conversion coefficient K of this kind of active carbon;Conversion coefficient K is between 20-30 certain fixed value;According to conversion coefficient K and the dry base volatile content of field active carbon sample, the reduction amount of field active carbon sample iodine adsorption value is calculated;According to the reduction amount of field active carbon sample iodine adsorption value and the iodine adsorption value of new carbon, the current iodine adsorption value of field active carbon sample is calculated, which corresponds to the adsorption saturation degree of field active carbon sample.The active carbon adsorption saturation degree test method of the application utilizes the characteristics that volatile components increase after active carbon adsorbs organic matter, by testing the volatile component content in active carbon, and by specific calculation, the current iodine adsorption value of active carbon is obtained, which simplifies the analysis steps, reduces the difficulty of field analysis, improves the detection efficiency and popularization degree.

To provide soluble solid personal care products containing sulfate-free surfactants, particularly soluble solid cleansing articles, and more specifically, soluble solid fibrous cleansing articles. [Solution] A soluble solid cleansing article is disclosed, comprising (a) a polymer structuring agent in an amount of about 5% to about 60% by weight on a dry basis, and (b) a surfactant system comprising a taurate surfactant, including an acyl taurate surfactant, in an amount of about 13% to about 90% by weight on a dry basis, and an amount of about 10% to about 54% by weight on a dry basis. A melt composition for producing a soluble solid cleansing article is also disclosed. This disclosure provides a soluble solid article, particularly a soluble solid fibrous article, containing a taurate surfactant, especially when polyvinyl alcohol (PVOH) is used as the polymer structuring agent.

This disclosure relates more particularly to calcium sulfate-based suspensions useful, for example, for making gypsum boards for building construction, as well as methods for using them, for example, for making gypsum boards; in one aspect, this disclosure provides a calcium sulfate suspension composition comprising calcium sulfate basically present in the form of one or more hydrates, the calcium sulfate being present in an amount in the range of 70-99.8% w / w on a dry basis, calculated as stucco; and a cationic starch present in an amount of 0.10-10% w / w of the amount of calcium sulfate as stucco on a dry basis, the cationic starch being substituted by amine and / or ammonium groups and having a %N value in the range of 0.10% pa 2% w / w, and an RVA viscosity value of at least 100 cP at 65 °C and 16% w / w; and water, in a sufficient quantity to form a suspension; the disclosure further provides gypsum-based materials useful as building materials, for example, for use as building boards in the construction of building walls and ceilings.

Disclosed is a soluble solid cleansing article comprising: a) a polymer structuring agent in an amount of about 1% to about 60% by weight, on a dry basis; and b) a surfactant system comprising a sulfonate-containing anionic surfactant in an amount of about 5% to about 90% by weight, on a dry basis, wherein the article contains less than 5% glutamate anionic surfactant and is substantially free of sulfate-based surfactants. The soluble solid article of this disclosure can achieve a reduction in precipitates, in particular when such a soluble solid shampoo article is used with hard water.

The application discloses a method for distinguishing coal types for power generation boilers, which comprises the following steps: first, obtaining the dry ash-free basis volatile matter V daf , the received basis volatile matter V ar , the dry ash-free basis carbon C daf , the dry ash-free basis hydrogen H daf , the dry ash-free basis oxygen O daf , and the air dry basis moisture M ad ; second, calculating the coal type coefficients k1 and k2; and third, distinguishing the coal type. The application can distinguish the type of the coal sample only by using the conventional coal quality detection results, and the method is simple.

This invention provides a method for preparing sulfate-resistant concrete. The method includes: adding 8% to 12% PBL powder to freshly mixed ordinary Portland cement concrete; wherein the PBL powder is prepared by grinding phosphogypsum, magnesite, and limestone in a dry basis mass ratio of 4:2:1. By adding 8% to 12% PBL powder to ≥C30 ordinary Portland cement concrete, even after the corrosive medium sulfate has penetrated into the concrete, a sulfate attack reaction will not occur. Therefore, even in highly corrosive environments, it is not necessary to adopt engineering measures such as waterproofing layers, reducing the corrosivity of environmental water, drainage, soil replacement, lowering the groundwater level, and setting up protective layers as specified in DL / T5801—2019 "Technical Specification for Application of Sulfate-Resistant Concrete".

This application discloses a method for the synergistic mineralization of carbon dioxide from fly ash-based multi-component solid waste and its application, relating to the fields of industrial solid waste resource utilization and carbon dioxide mineralization and storage technology. The method involves mixing type F fly ash and steel slag powder with Bayer process red mud to obtain a multi-component solid waste mixed slurry. Based on the total dry weight of the three raw materials (100%), the Bayer process red mud content is 11%-23%, the steel slag powder content is 22%-40%, and the type F fly ash content is 44%-75%. The flue gas to be treated is passed into the mixed slurry at 40-60℃ to carry out a mineralization reaction. The CO₂ content in the flue gas is 10-20 vol%. The reaction is stopped when the pH reaches neutrality through online monitoring. Solid-liquid separation yields the mineralized product. This method fixes more than 60 kg of CO₂ per ton of solid waste, which is 35.33% higher than the binary system. The mineralized product can be applied to underground filling, saline-alkali land treatment, and roadbed engineering, achieving high-value utilization of solid waste.

The invention discloses a carbon content calculation method and system based on intelligent coal quality parameters. The method comprises the following steps: acquiring batch coal samples from the same mining area or with stable coal quality characteristics; determining the air-dry-basis ash content and the air-dry-basis carbon content of a plurality of samples in the batch of coal samples by adopting a standard method; performing linear regression analysis on the measured data of the air-dry basis ash content and the air-dry basis carbon content, and establishing a linear relational expression between the air-dry basis carbon content and the air-dry basis ash content; determining the air-dry basis ash content of the similar coal samples to be detected; and substituting the measured air-dry basis ash content into the obtained linear relational expression, and calculating to obtain the air-dry basis carbon content of the coal sample to be measured. According to the method, the linear relation between the air dry basis ash content and the carbon content of the coal is established, so that the carbon content can be calculated only by measuring the ash content. The detection process is simplified, the cost and time for measuring the carbon content are remarkably reduced, and the technical problems in frequent detection and long-term carbon emission accounting are solved.