264 results about "Lime" patented technology

The invention relates to the technical field of lime shaft kilns, in particular to a full-automatic Kawasaki rotating lime shaft kiln device, and aims to solve the problems that during combustion of an existing lime shaft kiln, due to the fact that flame heat is concentrated on a local part, a disordered and uniform temperature field cannot be formed, and the calcination temperature of limestone is not uniform; limestone processing is achieved through the combustion mechanism on the supporting seat, the soaking assembly in the thermal insulation shell guides materials and cooperates with the combustion assembly for preheating, a flame jet device of the combustion assembly jets flames, the flames act with heating gas blown out by the high-pressure air pump to form a uniform temperature field, and the material guiding plate guides the materials to enter the rotating processing part. And the processing component disperses the materials through the rotating and material uniformizing assembly, so that the limestone is uniformly heated, and the uniform effect during limestone calcination is improved.

The invention relates to the technical field of building materials, in particular to a cementing material for a fabricated wall prepared from multi-element solid waste and a preparation method of the cementing material. The preparation method comprises the following steps: 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurized gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of the metakaolin to the bentonite to the superfine calcium carbonate in the first mixture is 3: 2: 1; the mass ratio of the vermiculite to the expanded perlite to the glass beads in the second mixture is 2: 2: 1. Through the synergistic excitation effect of Ca < 2 + > and Na < + > and the addition of the first mixture and the second mixture, the cementing material forms a more stable microstructure. A hydration product SEM figure shows that C-S-H and C (N)-A-S-H gel are symbiotic to form a three-dimensional network, pores are filled with needle-like ettringite crystals, and in combination with the brucite phase anchoring effect, the mechanical properties, such as strength and durability, of the material are remarkably improved.

The invention relates to the technical field of rotary kiln processes, and provides a method for reducing nodulation in a lime rotary kiln, which comprises the following steps: S1, raw material pretreatment; s2, controlling the environment in the kiln; s3, optimizing the structural design of the kiln body; and S4, cleaning and maintaining in the kiln. According to the technical scheme, through the process steps of proportioning the raw materials, calculating the calcining temperature in a kiln, adjusting the stockline of a cooler to be 1.5 m, starting to discharge ash, and ending when the stockline of the cooler is 0.5 m, the CaO range of block ash is reduced by 11.44%, the SiO2 range is reduced by 1.52%, the activity range is reduced by 94.88 ml, the CaO range of surface ash is reduced by 6.95%, the SiO2 range is reduced by 0.54%, and the activity range is reduced by 100 ml; the data verifies that the quality of the finished product ash subjected to multi-fuel combustion in the rotary kiln is relatively stable after the new method is adopted.

The invention relates to the technical field of river sludge solidification, in particular to a river dredging sludge solidification treatment device which comprises a box body, a sludge pipe is fixedly installed on the box body, a mixing assembly is fixedly installed at the end, located in the box body, of the sludge pipe, a solidification assembly is fixedly installed on the box body, and the solidification assembly is located below the mixing assembly; external lime powder enters the lime pipe in an air blowing mode, sequentially passes through the air shell and the particle pipe and enters the uniform distribution pipe, the lime powder is sprayed to the bottom of the mixing tank through the powder nozzles on the surface of the uniform distribution pipe to complete distribution of the lime powder, and then the output end of the distribution motor drives the crankshaft to rotate. The sliding rod drives the abutting plate to move downwards, the abutting plate drives the soft rubber sealing plug to move downwards, the soft rubber sealing plug is separated from the inner wall of the mixing tank, sludge flows in along the inner wall of the mixing tank and makes contact with lime powder at the bottom to be fused, the water content of the sludge is reduced, the sludge is pretreated, and the subsequent chemical curing effect is improved.

The utility model relates to the technical field of limestone processing, in particular to lime block grinding equipment, which not only can screen lime blocks and crush large lime blocks so as to improve the working efficiency, but also can purge the device after lime powder is discharged so as to avoid waste caused by residual lime powder in the device. Comprising a feeding mechanism; the device further comprises a grinding mechanism, a screening mechanism, a discharging mechanism and a blowing mechanism, the grinding mechanism is installed on the feeding mechanism and grinds lime blocks, the screening mechanism is installed on the grinding mechanism and screens the lime blocks, and the discharging mechanism is installed on the grinding mechanism and accelerates discharging of lime powder. The purging mechanism is installed on the feeding mechanism and purges the interior of the device.

The invention provides a low-nitrogen combustion decomposing furnace and a lime calcining system, and belongs to the technical field of limestone calcining, specifically, the low-nitrogen combustion decomposing furnace comprises a decomposing furnace body used for calcining and decomposing limestone, and a furnace chamber of the decomposing furnace body is divided into a material collecting area, a hot carbon reduction area and a combustion decomposing area; materials, combustion-supporting gas and fuel enter the decomposing furnace body in two ways, and the proportion of the materials, the combustion-supporting gas and the fuel entering the decomposing furnace body in the two ways is controlled, so that a hot carbon reduction area and a combustion decomposing area are formed in a furnace cavity of the decomposing furnace body. For example, the proportion of combustion-supporting gas in the combustion decomposition area is more, so that materials can be fully combusted, while the proportion of the combustion-supporting gas in the hot carbon reduction area can be reduced, so that insufficient combustion is carried out in the area, and meanwhile, suppression and reduction are carried out through fuel, so that nitrogen oxide passing through the area is subjected to reduction reaction to become carbon dioxide and nitrogen to be discharged; the content of nitrogen oxide is greatly reduced, and the nitrogen oxide treatment procedure of the subsequent exhaust process is reduced.

The invention discloses a method for preparing a cementing material from tailings, and relates to the technical field of comprehensive utilization of mine tailings, and the method comprises the following steps: S1, classifying the tailings into fine tailings and coarse tailings; s2, iron impurities are removed from the fine tailings, and the fine tailings are ground to obtain tailing micro powder; s3, the coarse tailings are subjected to low-intensity magnetic separation, high-intensity magnetic separation and flotation, and feldspar is obtained; s4, calcining and grinding feldspar to obtain feldspar powder; s5, uniformly mixing feldspar powder, tailing micro powder, gypsum and slaked lime to obtain a mixture; s6, mixing water glass, NaOH and water to prepare an alkali activator solution; and S7, adding the alkali activator solution into the mixture, intensely stirring, and carrying out medium-temperature maintenance to obtain the cementing material. According to the method, the tailings are subjected to grading treatment, the fine tailings and the rough tailings are subjected to targeted processing, mineral components of the tailings are fully utilized, the comprehensive utilization rate of the tailings is remarkably increased, and accumulation of the tailings is reduced.

The invention provides a comprehensive analysis method for compaction quality of a lime treated soft soil roadbed based on intelligent compaction. The method comprises the following steps: S1, acquiring vibration modulus data corresponding to a plurality of detection units respectively; s2, calculating a compaction degree passing rate and a stability passing rate based on the vibration modulus data corresponding to the plurality of detection units, obtaining a uniformity passing rate by adopting a multi-scale variation structure analysis method, and calculating an abnormal aggregation index through a DBSCAN clustering algorithm; s3, determining the weight of each index, wherein the weight comprises the weight of the compaction degree passing rate, the weight of the uniformity passing rate and the weight of the stability passing rate; s4, calculating a compaction quality value based on each index and the corresponding weight; s5, the roadbed compaction quality grade is judged based on the compaction quality value, and roadbed repairing is conducted based on the roadbed compaction quality grade and the abnormal aggregation index. Compared with the prior art, the method has the advantages of improving the spatial resolution and defect identification precision of uniformity detection of the roadbed compactness and the like.

The utility model relates to the technical field of lime powder processing impurity removing devices, in particular to a lime powder processing impurity removing device which is characterized in that iron ore in lime is adsorbed by starting a magnetic attraction mechanism in the lime conveying process and discharged, lime powder is discharged into a screening mechanism, and the screening mechanism is used for screening the lime powder. The auxiliary mechanism and the screening mechanism are started to be matched to screen the lime powder, and the auxiliary mechanism adsorbs scrap iron in the lime powder and discharges the scrap iron, so that the practicability of the equipment is improved; comprising a crushing mechanism; the crushing mechanism and the magnetic attraction mechanism are installed above the conveying mechanism, the magnetic attraction mechanism is located on the right side of the crushing mechanism, the rolling mechanism is located on the right side of the conveying mechanism, the rolling mechanism is installed at the top end of the screening mechanism, and the auxiliary mechanism is installed at the top end of the screening mechanism; the auxiliary mechanism is located on the right side of the rolling mechanism.

The present invention provides a production method for reducing the incidence of edge cracks of Q235 wide and thick slabs, comprising the following steps: (1) converter smelting, with an iron-steel ratio of 850 kg / t, and adding silicon-manganese alloy and ferrosilicon weak deoxidation during the steel tapping process; (2) adding fluorite, lime, calcium carbide, and Taiwan aluminum to LF for strong stirring to promote sufficient pre-melting of the slag, diffusion deoxidation, and then power supply to form white slag, with the LF outlet composition controlled as follows: C: 0.15-0.18%, Si: 0.15-0.30%, Mn: 0.55-0.65%, P≤0.035%, ALs: 0.007-0.015%, S≤0.010%; (3) continuous casting process :A. The cross-section of the slab casting machine is 300mm×2200mm, and the casting speed is 0.80m / min; B. An immersion nozzle with an outlet inclination angle of 12°, an area of ​​4500 square millimeters, and an insertion depth of 110-140mm is adopted; C. Low melting point, low alkalinity, and low viscosity mold slag is used to slow down heat transfer; D. Weak cooling is adopted for secondary cooling water distribution; E. The side taper of the crystallizer is 1.2%; F. The sum of the inner and outer arcs of the wide surface taper of the crystallizer is controlled at 1.6-2.4mm, and the inner and outer arcs are both controlled at 0.8-1.2mm. The method of the present invention can reduce the incidence of subcutaneous cracks on the edge of Q235 wide and thick slabs to below 1%.

The present application relates to the technical field of building materials, in particular to a thermodynamic modified material for grotto rock mass fissure grouting and a preparation method thereof, which comprises the following components in a mass ratio: lime-based material 100-200 parts; quartz sand 30-50 parts; metakaolin 30-70 parts; calcium aluminate expansive agent 10-20 parts.The present application has the advantages of optimized thermal conductivity, controlled thermal expansion coefficient, improved microstructure and comprehensive performance.The thermal conductivity of the lime-based grouting material is higher than that of traditional tung oil materials, reducing thermal stress concentration caused by temperature gradient;the thermal expansion coefficient can be changed from negative to positive by adjusting the water-cement ratio and the amount of expansive agent, and tends to be close to the limestone rock mass, reducing the risk of interface peeling;the optimized material has higher crystallinity and denser structure, reducing microfissures and improving heat conduction efficiency;while maintaining high mechanical strength and durability, the material realizes directional modification of thermodynamic properties, providing technical support for long-term preservation of grottoes.

The invention provides a light-transmitting brick based on a low-temperature light burning process and a preparation method thereof, and the method comprises the following steps: according to a formula of a ceramic body, mixing Danshan sand, high-whiteness water mill tailings, lime particles, high alumina and barium carbonate, adding water, and carrying out ball milling to obtain barren slurry; carrying out spray granulation on the barren slurry to obtain barren powder, and calcining the barren powder in a preset low-temperature range to obtain a semi-finished product of a light calcined material; grinding the light calcined material semi-finished product to obtain light calcined material powder; mixing rubbed stone mud and ultra-white mud according to a formula of a ceramic green body, then performing slurrying to obtain slurry, mixing the light calcined material powder with the slurry, and then performing ball milling to obtain green body slurry; granulating the green body slurry to obtain green body powder, and treating the green body powder to obtain the light-transmitting brick. According to the invention, the light transmission performance, the firing yield and the product strength of the green body are improved, and the deformation rate during later high-temperature firing is reduced.

The application relates to an aerated concrete prepared from granite waste rock powder and a preparation method thereof. The aerated concrete of the application takes granite waste rock powder (skeleton effect), calcium carbide slag (calcic material), clay (sintering promotion), red mud (gel filling) and coal gangue (siliceous material) as core raw materials, replaces traditional natural sandstone and lime, realizes industrial solid waste resource utilization, conforms to the development direction of green building materials, and significantly reduces the dependence on natural resources.

The application discloses a device and a production method for producing low-sulfur and low-chlorine lime powder by calcining limestone powder, and belongs to the field of limestone powder production and steelmaking. The decomposition furnace is divided into a high-temperature oxygen-deficient combustion region, a first limestone decomposition region and a second limestone decomposition region. A high-temperature oxygen-deficient CaO-free environment is created in the high-temperature oxygen-deficient combustion region, so as to promote the volatilization of residual KCl and NaCl, and then the residual KCl and NaCl are discharged through bypass air release technology. Limestone is added in the first decomposition region for decomposition, and combustion-supporting air is added in the second limestone decomposition region for strengthening combustion effect. In this way, the decomposition rate of limestone can be improved, the quality of steelmaking lime can be improved, and the steelmaking cost can be reduced.

The invention discloses a process and effect evaluation method for a top section of a modified Ordovician limestone confined aquifer, and the method comprises the steps: analyzing, studying and judging the hydrogeological conditions of a mine, analyzing the water disaster factors of a treatment range or region, and calculating a water inrush coefficient, so as to facilitate the arrangement of a scheme; a water-bearing layer of the project is thoroughly modified into a water-resisting layer, so that the laneway project located at the layer is in a water-free state; a full-coverage three-dimensional arrangement mode that multiple layers of horizontal holes and top-lifting layer-penetrating holes are combined is adopted, an upper layer and a lower layer are staggered and distributed in a plum blossom shape, drilled holes are formed in multiple layers in a three-dimensional mode, and multiple layers of bedding horizontal holes and layer-penetrating inclined holes are formed in a combined mode. The technical method and route for modifying the top layer of the high-pressure-bearing Ordovician aquifer into the water-resisting layer through full-space complete grouting are achieved, the production technical problem is solved, and the domestic technical blank is filled up.

The invention provides a preparation method of goethite-boron complex minerals for soil improvement, and belongs to the technical field of preparation of artificial minerals for soil improvement, the preparation method comprises the following steps: 1, mixing solutions; 2, stirring the mixed solution; 3, dropwise adding a sodium hydroxide solution; step 4, centrifugal washing; 5, drying the precipitate; and 6, grinding and screening. According to the goethite-boron composite artificial mineral prepared through the method, the boron loss rate is reduced, the boron slow release performance is improved, the ecological environment effect is improved, the boron fertilizer utilization efficiency is improved, iron nutrition is synchronously provided, and the iron deficiency symptom of calcareous soil is relieved.

The application provides a heat transfer device of a heavy ash powder flow cooling alkali machine, which comprises a screw rod and a blade, the inner cavity of the blade is communicated with the inner cavity of the screw rod, a pipe fitting is arranged on the blade, and movable blocks are screwed into the two ends of the pipe fitting. The application can change the contact area between the inner wall of the two ends of the pipe fitting and the material by changing the screwing depth of the movable blocks in the pipe fitting, so that the heat exchange efficiency can be further improved.

This invention provides a method, apparatus, and equipment for predicting the amount of hydrated lime input outside the furnace in a two-stage combined desulfurization process, relating to the field of desulfurization control technology. The method includes: acquiring desulfurization operating parameters, including coal quality characteristics, the amount of limestone input in the boiler, the actual amount of hydrated lime input in the desulfurization tower, the actual SO2 concentration at the boiler outlet, and the actual SO2 concentration at the desulfurization tower outlet; using the desulfurization operating parameters as input, determining the desulfurization operating condition category corresponding to the desulfurization operating parameters through a pre-trained desulfurization operating condition prediction model; and calling the hydrated lime input prediction model corresponding to the determined desulfurization operating condition category, using the amount of limestone input in the boiler, the actual SO2 concentration at the boiler outlet, and the pre-determined target SO2 concentration at the desulfurization tower outlet as input, and predicting the target amount of hydrated lime input in the desulfurization tower through the hydrated lime input prediction model. This invention is based on modeling for combined in-furnace and out-of-furnace desulfurization, realizing the prediction of the amount of hydrated lime input outside the furnace.

The application discloses a suspension calcining system with a CO2 partial pressure reduction function and a method for preparing high-activity lime, and belongs to the technical field of lime stone calcination. The system comprises a pretreatment unit, a calcining unit, a cooling unit, a dust removal unit, a CO2 treatment unit and a product bin. The steps for preparing high-activity lime are as follows: after crushing the lime stone raw ore, the lime stone powder is added into a lime stone powder feeding bin, is fed into a cyclone preheater for three-stage preheating, is added into a suspension calcining furnace for calcination, air is introduced into the bottom of the calcining furnace during the calcination process, and the powder is ensured to be in a suspension state at all times; the powder after the calcination is sent into a cyclone cooler for three-stage cooling, and high-activity lime is obtained. In the process of preparing high-activity lime, the powder is heated more uniformly, the heat transfer efficiency is higher, the flowing gas timely discharges the CO2 generated by the decomposition, the CO2 treatment equipment is used for separation, the lime stone decomposition is moved to a positive direction, the decomposition speed is accelerated, and the decomposition efficiency is improved.

The invention relates to a comprehensive utilization method of copper tailings, which comprises the following steps: S1, carrying out mineral separation on the copper tailings to obtain alunite, sulfur concentrate, middlings and quartz tailings; performing flotation on the quartz tailings to obtain high-purity quartz and flotation quartz; s2, the middlings in the step S1 and flotation quartz with the weight not lower than 90% are mixed, silicon oxide and iron oxide are separated, and a mixture is obtained; s3, mixing the mixture in the step S2 with the neutralized slag and limestone, and roasting at 1000-1450 DEG C to obtain cement clinker; the neutralization slag is solid waste generated after acid wastewater and / or waste gas are / is neutralized by lime. According to the method disclosed by the invention, the effective components in the middlings and the quartz tailings after the copper tailings are beneficiated can be efficiently utilized to obtain the cement meeting the quality requirement of GB 175-2023, so that the copper tailings and the neutralization slag are massively absorbed, the resource shortage is effectively relieved, the environmental problem caused by solid waste stockpiling is reduced, and the ecological benefit, the economic benefit and the social benefit are remarkable.

The utility model relates to the technical field of calcium carbonate production, in particular to a raw material flushing device for calcium carbonate production, which comprises a base and a washing screen drum mechanism, the top of the base is fixedly connected with a butt joint frame, the washing screen drum mechanism is rotatably connected with the butt joint frame, a screen plate and a material receiving frame are slidably connected to the top of the base, and one side of the material receiving frame is rotatably connected with a regulation and control plate. The feeding hopper is movably arranged at the top of the base, the regulating module is arranged at the top of the base and used for driving the sieve plate to vibrate in a reciprocating mode, and the driving module is arranged at the top of the base. According to the limestone cleaning machine, the top of the base is connected with the material receiving frame in a sliding mode, the feeding hopper transversely moves in a reciprocating mode to evenly feed limestone into the material receiving frame, the material receiving frame moves downwards in a reciprocating mode and is impacted by the transverse plate to promote mud to fall off, the limestone is fed to the top of the screen plate to screen away most of marl, and most of the marl is stripped before cleaning; the subsequent cleaning effect is optimized, the cleanliness of limestone is higher, it is guaranteed that produced calcium carbonate is good in quality, and use is convenient.

The present application relates to the technical field of steelmaking auxiliary materials, in particular to a method for improving the balling rate of molybdenum oxide composite briquetting, in which process, in order to control the material temperature and overcome the problem of reaction heat release in the material, raw dolomite or limestone particles which are not easy to react with water are used to replace the traditional inhibitor lime, and the chemical reaction heat production is effectively controlled; the briquetting process provided by the present application adjusts the conventional one-time stirring and mixing to twice stirring, dry ice is added for cooling during the stirring process, and each time after stirring, standing is carried out, and through the above measures, the problem of material heating caused by the heat generated by material stirring and chemical reaction and then causing the problem of cracked briquetting after briquetting can be effectively solved. The balling rate of the molybdenum oxide composite briquetting for steelmaking produced by the process reaches more than 90%, the breaking strength is greater than 600N, and the falling strength is more than 15 times / (0.5m).

The utility model relates to the technical field of calcium oxide flue gas dust removal equipment, and discloses flue gas dust removal equipment for calcium oxide production, which comprises a box body, a gas inlet pipe arranged on one side of the box body, an exhaust pipe arranged on the other side of the box body, an ionizer control cabinet arranged at the top of the box body, and a plurality of distribution plates connected with the ionizer control cabinet, a dust collecting plate controller is arranged on one side of the ionizer control cabinet and fixedly connected with a connecting wire, the connecting wire is fixedly connected with a dust collecting plate, an upper support is arranged at the top of the dust collecting plate, a lower support is arranged below the dust collecting plate, a concentration plate is arranged on one side of the lower support and rotationally connected with a connecting shaft, and a spring is arranged on the outer side of the connecting shaft in a sleeving mode. One end of the connecting shaft is rotatably connected with a striking plate which is in frictional contact with a synchronizing shaft, and one end of the synchronizing shaft is fixedly connected with a motor; therefore, the impact force in the striking process is effectively absorbed, the force directly acting on the connecting part of the dust collecting plates is reduced, and the risk of fracture of the connecting part is greatly reduced.

The invention belongs to the technical field of mineral flotation, and particularly relates to a low-alkali low-calcium comprehensive utilization method for high-clay copper-molybdenum sulfide ores, which comprises the following steps: replacing lime with part of sodium hydroxide, reducing calcium ions in ore pulp from the source, complexing calcium ions in alkaline ore pulp by using a novel high-entropy dispersing agent and a combined dispersing agent in a low-alkali ore pulp environment, and reducing the content of calcium ions in the alkaline ore pulp. The problem of copper-molybdenum metal loss caused by the fact that ore pulp floccules wrap monomer copper-molybdenum minerals under the high-alkali condition is solved, efficient enrichment of copper and molybdenum under the low-alkali medium is achieved, and the molybdenum-copper ratio of the flotation concentrate is greatly increased compared with that of conventional copper-molybdenum mixed flotation concentrate. In addition, according to the method, the dispersion effect of the copper-molybdenum flotation tailings is good, comprehensive recycling of kaolin is achieved, the resource utilization rate is increased, the discharge amount of fine-grain tailings is reduced, and favorable conditions are provided for forming an effective dry beach in a tailings pond.

The present application relates to the technical field of mineral flotation reagent, in particular to a chalcopyrite flotation composite collector and application thereof; the chalcopyrite flotation composite collector is prepared by mixing a first collector and a second collector at a mass ratio of 5-7:1.0-1.5; the prepared first collector is applied to the field of chalcopyrite flotation, and has good flotation performance and higher selectivity, and significantly improves the recovery rate of chalcopyrite flotation; the obtained second collector contains multiple sulfur-containing and oxygen-containing functional groups in the molecule, has good collecting ability and selectivity for chalcopyrite, and can significantly improve the flotation recovery rate of chalcopyrite; in addition, the mutual cooperation between the first collector and the second collector can further improve the recovery rate and grade of chalcopyrite; under the condition of adding a small amount of lime, a copper concentrate with high copper grade is obtained, the pH value of tailing backwater is also greatly reduced, the alkalinity standard requirement of direct discharge of backwater is met, and the sustainable development of the environment is beneficial.

The utility model discloses a drop point marking device for tracking and identifying a flying rock trajectory in foundation pit blasting, and aims to solve the problems that a shovel and white lime are used for marking in existing foundation pit blasting, local thick and thin marking lines are not uniform, and great material waste is caused. The device comprises a storage hopper and a discharge port formed in the bottom end of the storage hopper, a fixing plate is fixedly connected to the bottom end of the storage hopper, racks are fixedly connected to the left side and the right side of the upper surface of the fixing plate, an arc-shaped groove is formed in the lower surface of the fixing plate and communicates with the discharge port, and two side plates are fixedly connected to the left side and the right side of the lower surface of the fixing plate. By arranging the storage hopper, the rack and the rolling wheel, when the lime marking device is used, lime is poured into the storage hopper, then the device is pulled to rotate around the rolling wheel, and the lime in the storage tank can uniformly fall on the ground at the moment, so that the marked lime white line is more uniform, the waste of materials is avoided, and the lime marking device is very convenient to use.

The application relates to the technical field of building materials, in particular to a cementing material for preparing an assembled wall body from multiple solid wastes and a preparation method; the cementing material is prepared from 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurization gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of metakaolin, bentonite and superfine calcium carbonate in the first mixture is 3:2:1; the mass ratio of vermiculite, expanded perlite and glass beads in the second mixture is 2:2:1. The cementing material has a more stable microstructure through the synergistic activation of Ca and Na, and the addition of the first mixture and the second mixture. 2+ and Na + The C-S-H and C(N)-A-S-H gels form a three-dimensional network, needle-shaped ettringite crystals fill pores, and the anchoring effect of brucite phase is combined, so that the mechanical properties, such as strength and durability, of the material are significantly improved.

The application discloses a method for carbonization coating solidification / stabilization of industrial solid waste building material utilization. The method is as follows: crushing, grinding and screening industrial solid waste and high calcium solid waste or raw / cooked lime; mixing industrial solid waste with high calcium solid waste or raw / cooked lime; adding water into a carbonization reaction container for multiple times, and uniformly dispersing; introducing CO2-containing gas into the bottom of the carbonization reaction container to react with the dissolved high-quality solid waste calcium source, so that the generated calcium carbonate crystals grow on the surface of the industrial solid waste, the industrial solid waste is coated and solidified, and after being static, solid-liquid separation is performed, the content of pollutants in the liquid is determined, and it is ensured that secondary water pollution is not caused, and meanwhile, the solid is dried and dispersed to obtain the carbonization coating modified industrial solid waste product; and the dispersed modified industrial solid waste product is used as aggregate to prepare sustainable low-carbon concrete, and curing and form removal are performed, and the sustainable low-carbon concrete is obtained. The method has the characteristics of low cost, high strength, simple operation and solidification and stabilization of all types of pollutants.

The invention relates to the technical field of lime production, in particular to a double-hearth shaft kiln material level automatic adjusting system and method based on image processing, and the system comprises a high-temperature industrial endoscope, a lens alignment refractory brick, a PLC control system, a differential supporting plate discharging device and a hydraulic system; the lens alignment refractory brick is arranged on the side wall of the top of the kiln chamber and coincides with the horizontal center line of the kiln chamber. The high-temperature industrial endoscope is arranged on the opposite side of the lens alignment refractory brick to ensure that a complete limestone charge level can be contained in the visual field of the lens, and the lens alignment refractory brick is located at the vertical position in the visual field of the lens, so that the axis of the lens coincides with the horizontal center line of the kiln chamber; the differential supporting plate discharging device is located under a discharging port of the shaft kiln, 6-8 supporting plates are evenly arranged in the circumferential direction, and each supporting plate can independently conduct vibration discharging. According to the method, the height of each area of the material surface is calculated and adjusted in real time, so that the limestone material surface is smoother, the calcination time of each part of the limestone material is more uniform, and the underfiring rate and the overfiring rate are reduced.