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16 results about "Calcifuge" patented technology
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A calcifuge is a plant that does not tolerate alkaline (basic) soil. The word is derived from the Latin 'to flee from chalk'. These plants are also described as ericaceous, as the prototypical calcifuge is the genus Erica (heaths). It is not the presence of carbonate or hydroxide ions per se that these plants cannot tolerate, but the fact that under alkaline conditions, iron becomes less soluble. Consequently, calcifuges grown on alkaline soils often develop the symptoms of iron deficiency, i.e. interveinal chlorosis of new growth. There are many horticultural plants which are calcifuges, most of which require an 'ericaceous' compost with a low pH, composed principally of Sphagnum moss peat.
Dry-process cement clinker sintering device
The utility model provides a dry process cement clinker firing device which comprises a preheating mechanism, a decomposing furnace, a material spraying assembly, a rotary kiln and a cooling machine, the preheating mechanism is used for preheating raw materials, the decomposing furnace is connected with the preheating mechanism, the decomposing furnace is used for receiving and decomposing the preheated raw materials, the material spraying assembly is connected with the decomposing furnace, and the rotary kiln is connected with the cooling machine. The material spraying assembly is used for evenly spraying preheated raw materials into the rotary kiln, the rotary kiln is used for calcining the raw materials to form clinker, the rotary kiln sequentially comprises a shell, at least two heat insulation layers and a heat-resistant lining from outside to inside, and the cooling machine is used for cooling the clinker. Due to the fact that the material spraying assembly evenly sprays the preheated raw materials into the rotary kiln, the raw materials can be heated more sufficiently and evenly in the rotary kiln, the calcining process is more thorough, and the clinker quality is further guaranteed. In addition, due to the fact that the rotary kiln comprises at least two heat insulation layers, the heat insulation effect of the rotary kiln is better, and the calcination process is more thorough.
Owner:WEIHUI CHUNJIANG CEMENTS CO LTD
A device and method for producing low-sulfur and low-chlorine lime powder by calcining limestone powder
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.
Owner:天津中材工程研究中心有限公司 +1
A dicalcium silicate-calcium sulfoaluminate-calcium sulfo-silicate cement clinker and an industrialized preparation method thereof
The application discloses a kind of dicalcium silicate-calcium sulphoaluminate-calcium sulphosilicate cement clinker and its industrialized preparation method, it is related to building material technical field, method includes steps: S1, raw material preparation, calcareous, siliceous and sulphuric raw materials are proportioned according to proportion, raw material rate value is limestone saturation coefficient 0.9~1.0, aluminium sulphur ratio ≤2.2, aluminium silicon ratio ≤1.0;S2, preheating decomposition, raw meal is handled by multistage cyclone preheater and decomposition furnace, the temperature of first-stage cyclone preheater outlet ≤310 ℃, the middle part temperature of decomposition furnace 770±10 ℃;S3, calcination, material enters rotary kiln, sintering zone temperature 1200~1250 ℃, weak oxidation or neutral atmosphere in kiln;S4, quenching, kiln clinker is cooled by grate cooler, 15~25min is cooled to 100 ℃ below from 1200~1250 ℃;S5, crushing storage, after cooling clinker is crushed and is stored, finished product is obtained, solve the problem that existing dicalcium silicate-calcium sulphoaluminate-calcium sulphosilicate cement clinker is easily decomposed at high temperature, sintering temperature zone is narrow, industrialized mineral composition fluctuation is big and kiln system is easily crust blocking.
Owner:JIAHUA SPECIAL CEMENT
A method for dividing and identifying temperature working conditions of a decomposition furnace under waste co-processing
The application discloses a kind of decomposition furnace temperature working condition division and identification method under garbage collaborative disposal, its steps include:1) using WK-Means algorithm to carry out decomposition furnace temperature working condition division;2) using IPSO-SVM algorithm to carry out decomposition furnace temperature working condition identification.The application is aimed at the key parameter in the process of decomposition furnace temperature control under garbage collaborative disposal to carry out working condition division and identification, so as to improve the efficiency and accuracy of decomposition furnace temperature multi-working condition division and identification under garbage collaborative disposal.
Owner:HEFEI UNIV OF TECH
Multi-objective optimized cement decomposing furnace intelligent prediction control method, device and equipment
PendingCN121596740AAdaptive controlSimultaneous control of multiple variablesFurnace temperatureGenetics algorithms
The invention provides a multi-objective optimization cement decomposing furnace intelligent prediction control method, device and equipment, and relates to the technical field of cement decomposing furnace control. The method comprises the following steps: respectively obtaining an f-CaO prediction value, an NOx prediction value and a decomposition furnace temperature prediction value at the next moment through an f-CaO prediction model, an NOx prediction model and a decomposition furnace temperature prediction model. Wherein the f-CaO prediction model, the NOx prediction model and the decomposition furnace temperature prediction model are respectively constructed on the basis of a CNN-P-sLSTM network, a CNN-minGRU network and a Reformer-KAN network, and are obtained through training of the CNN-P-sLSTM network, the CNN-minGRU network and the Reformer-KAN network. And on the basis of the f-CaO predicted value and the NOx predicted value at the next moment, the optimal solution interval of the state parameters is calculated through a multi-objective genetic algorithm NSGA-II. And performing intelligent control on the cement decomposing furnace based on the optimal solution interval of the state parameters and the temperature predicted value of the decomposing furnace at the next moment. The production cost and pollution emission can be reduced, and the quality of a cement finished product and the resource utilization rate are improved.
Owner:YANSHAN UNIV
Novel self-denitration carbide slag cement kiln production line
The utility model relates to the technical field of cement kiln denitration, and discloses a novel self-denitration carbide slag cement kiln production line which comprises a rotary kiln, a smoke chamber, a decomposing furnace, a C1 preheater, a C2 preheater, a C3 preheater, a raw material conveying system, a carbide slag conveying system, a drying crusher and a cyclone dust collector. An exhaust pipe of the C3 preheater is connected with a discharge pipe of the C1 preheater, an exhaust pipe of the C2 preheater is communicated with an inlet end of the drying crusher, the carbide slag conveying system is communicated with the exhaust pipe of the C2 preheater, an outlet end of the drying crusher is communicated with the cyclone dust collector, an exhaust pipe of the cyclone dust collector is communicated with a discharge pipe of the raw material conveying system, and the raw material conveying system is communicated with a discharge pipe of the cyclone dust collector. And an exhaust pipe of the preheater C1 is connected with a high-temperature fan. According to the utility model, the temperature of the inlet entering the drying crusher is increased, so that the initial reaction temperature of ammonia and nitrogen oxide in carbide slag is increased, and the automatic denitration effect of a production line system is realized.
Owner:SICHUAN ZHONGKEJUN ENERGY CONSERVATION & ENVIRONMENTAL PROTECTION TECH CO LTD
Low NOx-based X Method for controlling a decomposition furnace for full system oxycombustion, method and system for preparing cement clinker
Owner:TIANJIN CEMENT IND DESIGN & RES INST CO LTD
Method for recycling solid wastes used in cement production
The invention discloses a solid waste recycling material recycling method for cement production, which belongs to the technical field of cement production, and comprises the following steps of: dividing solid wastes into alternative raw materials, alternative fuels and mixed materials according to components, and respectively crushing, sorting and homogenizing; mixing the substitute raw material type solid wastes with natural raw materials according to a preset ratio, and adjusting the silicon rate, the aluminum rate and the saturation coefficient of lime to form a cement raw material; the alternative fuel type solid waste is dried, crushed and then conveyed to a rotary kiln or a decomposing furnace, and part of fossil fuel is replaced for high-temperature calcination; in the cement grinding stage, the mixed material type solid waste is mixed into clinker according to the mass percent of 5%-40%, and the mixed material type solid waste and the clinker are jointly ground into a cement finished product; organic matters in the solid waste are decomposed through a high-temperature and alkaline environment in the kiln, heavy metals are solidified, and emission indexes are monitored in real time; according to the invention, through solid waste classification treatment and multi-link cooperative utilization, recycling and disposal of various types of solid wastes are realized.
Owner:英德海螺水泥有限责任公司
System for producing lime from carbide slag
The utility model belongs to the technical field of industrial waste residue recycling, and particularly discloses a system for producing lime from carbide slag. The system is composed of a carbide slag warehouse, metering equipment, conveying equipment A, conveying equipment B, conveying equipment C, conveying equipment D, a homogenization metering system, a cyclone preheating system, a cyclone calcination decomposition system, a suspension cooling system, a lime warehouse, a homogenization metering system, granulation equipment, a calcium carbide production line and the like. The device disclosed by the utility model has the beneficial effects that the process flow is simple, the layout is compact, the suspension preheating decomposition calcining technology of cyclone preheating, pipeline type decomposition furnace and suspension cooling is adopted, continuous production can be realized, the production efficiency is high, the decomposition rate of carbide slag is greater than 98%, and the yield is high; according to the utility model, the calcium carbide slag suspension calcination technology is adopted, the unit product energy consumption of lime can be reduced, so that the unit energy consumption of calcium carbide finished products is reduced, the calcium carbide by-product furnace gas is adopted as the calcination fuel, the reasonable and full utilization of coal resources can be realized, and no extra coal resource consumption is caused.
Owner:NANJING GOLDEN CEMENT TECH ENG CO LTD
A method of controlling the color of high iron content calcined clay
The present application belongs to the technical field of inorganic non-metallic material, and particularly relates to a method for controlling the color of calcined clay with high iron content. The method comprises a clay raw material suspension preheating system (1), a clay raw material suspension calcination section system (2) and a calcined clay suspension cooling system (3). The clay raw material suspension preheating system (1) is connected with the clay raw material suspension calcination section system (2), and the clay raw material suspension calcination section system (2) is connected with the calcined clay suspension cooling system (3). The present application does not need to control the atmosphere in the calcination and cooling stages, and the process flow is simple. In the cooling stage, the heat of the high-temperature calcined clay can be efficiently recovered through the ambient air, and the recovered high-temperature air can be used as combustion-supporting air for fuel combustion in the decomposition furnace, so that the heat consumption is greatly reduced. When the iron content of the clay is higher than 5%, the color of the calcined clay can also be kept gray, and the magnetite with high added value can be obtained.
Owner:CHENGDU DESIGN & RES INST OF BLDG MAT IND CO LTD
Cement calcination harmless process based on waste cathode carbon block alternative fuel
The invention discloses a cement calcination harmless process based on waste cathode carbon block alternative fuel, which comprises the following steps: after electrolytic aluminum waste cathode carbon blocks are subjected to magnetic separation to remove iron and are ground into 80 mu m sieve residue less than or equal to 12 percent, pre-mixing with pretreated Bayer process red mud (Al2O3 is more than or equal to 18 percent by weight and Na2O is less than or equal to 6 percent by weight) according to a mass ratio of 100: (3-8) to form composite fuel; the fuel is sprayed into a decomposing furnace through a multi-channel combustor, and stays at 860-900 DEG C for more than or equal to 5 seconds to replace 15-35% of fire coal; after combustion, the raw material stays for 25-40 minutes in a high-temperature zone of 1420-1450 DEG C of the rotary kiln, so that fluorine ions react with Al2O3 in the red mud to generate a Na3AlF6 mineral phase; the kiln tail flue gas is suddenly cooled to below 180 DEG C within 0.8 second through a quench tower to inhibit dioxin, and then carbide slag (Ca / F molar ratio is 1.5-2.2) is sprayed to remove residual fluorine; and returning the defluorinated dust to the raw mill for cyclic utilization. According to the technology, the fluorine curing rate is larger than or equal to 95%, the dioxin emission is smaller than or equal to 0.025 ng-TEQ / Nm < 3 >, the clinker coal consumption per ton is smaller than or equal to 95 kgce, and the problems of pollution control and energy efficiency optimization in the waste cathode carbon block fuelization process are solved.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Energy-saving operation method of preheating and pre-decomposing system for cement production
The invention relates to the technical field of preheating and predecomposition in cement production, and discloses an energy-saving operation method of a preheating and predecomposition system for cement production. Energy saving is achieved through cooperative control of raw material components and the temperature of the preheater. According to the raw material component control, 2.02.5% by mass of specific coal gangue is added into the raw material, the initial decomposition temperature of calcium carbonate is reduced by utilizing the chemical characteristics of the specific coal gangue, and advanced decomposition of the raw material in a C1C4-level preheater is promoted. According to the preheater temperature control, the outlet temperatures of C1C4-grade preheaters are actively increased to about 340 DEG C, 520 DEG C, 640 DEG C and 800 DEG C respectively, so that the total decomposition rate of raw materials before the raw materials enter a C5-grade preheater is greatly increased. On the basis, the C5 outlet temperature can be reduced to about 840 DEG C on the premise that the kiln-entering decomposition rate is not changed, and the energy input of the decomposing furnace is reduced. The system heat distribution is effectively optimized, the problem of high energy consumption caused by excessive dependence on a decomposing furnace in the prior art is solved, and the fuel consumption of a unit product is remarkably reduced.
Owner:NINGXIA QINGTONGXIA CEMENT CO LTD
Process method for producing calcium carbide
The invention relates to a process method for producing calcium carbide, which comprises the following steps of: powdering limestone blocks, calcining by a preheater and a decomposing furnace to obtain high-quality high-temperature lime powder, metering by a metering device, conveying the high-quality high-temperature lime powder and metered semi-coke powder blocks to a mixing stirrer, uniformly stirring to obtain high-temperature materials, continuously conveying the high-temperature materials to a ball press machine, and carrying out ball press molding on the high-temperature materials. According to the invention, the result is incomparable to that of the traditional equipment and the production process, and the method has the advantages of little dust, high utilization rate of heat energy and electric energy, and high productivity.
Owner:米长山
Retired wind power blade cement clinker, and preparation method and application thereof
The application provides a retired wind power blade cement clinker, a preparation method and application thereof. The method comprises the following steps: crushing solid waste raw materials; the solid waste raw materials comprise retired wind power blades, carbide slag, red mud and iron tailings; the proportioning of the solid waste raw materials is determined according to a preset rate value; the solid waste raw materials are measured according to the proportioning; the carbide slag, the red mud and the iron tailings are uniformly mixed to obtain a mixture; the mixture is ground into raw materials; the raw materials are homogenized and preheated; the preheated raw materials enter a decomposing furnace for decomposition, and coal powder and retired wind power blade powder are sprayed into the decomposing furnace; calcination is performed to obtain the cement clinker. The technical problem solved is how to prepare a cement clinker, so that the retired wind power blades and other solid waste raw materials can be effectively utilized, carbon emission is reduced, the land occupation pollution problem of the retired wind power blades is solved, the additional heat source can be provided in the adding process, the use amount of coal resources is saved, obvious energy saving and environmental protection benefits are achieved, and the production cost of a cement enterprise is reduced.
Owner:CHINA BUILDING MATERIALS ACADEMY CO LTD
A two-stage calcination and carbon dioxide recovery system and process for magnesite
ActiveCN121782850BReduce temperature loadSolve lossCarbon compoundsRotary drum furnacesCombustion chamberDust control
The application discloses a magnesite two-stage calcination and carbon dioxide recovery system and process, relates to the technical field of efficient utilization of magnesite, and aims to solve the problem of how to realize efficient and low-consumption calcination of high-quality magnesia and efficient recovery of carbon dioxide in a same process system. A rotary kiln is arranged in a rotary kiln combustion chamber, and the combustion chamber is used for heating the outer wall of the rotary kiln by gaseous fuel; the outlet end of the rotary kiln is communicated with a gas-solid separation chamber; magnesite powder is decomposed in the rotary kiln to generate carbon dioxide gas, which is led out by an induced draft fan through the gas-solid separation chamber, and micro-negative pressure in the kiln is maintained. High-temperature dust-containing carbon dioxide enters a downstream A1 carbon dioxide cyclone gas-solid separator for gas-solid separation. After heat exchange, cooling and dust removal, the high-temperature gas is transported to a carbon dioxide liquefaction and solidification treatment system; the solid material outlet of the gas-solid separation chamber is connected to the feeding port of a suspension decomposition furnace through a high-temperature airtight conveying device, and a decomposition furnace main combustion chamber is arranged at the bottom of the suspension decomposition furnace.
Owner:YINGKOU JINHONGYUAN MEI LU CERAMICS CO LTD
Process method for preparing lime and co-producing sulfur by using all-solid waste gypsum of cement kiln
PendingCN121405380ACalcium/strontium/barium carbonatesRotary drum furnacesClinker (waste)Process engineering
The invention provides a process method for preparing lime and co-producing sulfur by using cement kiln all-solid waste gypsum, and relates to the technical field of solid waste treatment and carbon dioxide capture and mineralization utilization. According to the method, a novel dry cement clinker kiln production system is subjected to nine targeted modifications (including independent operation modification of a decomposing furnace air pipe, additional arrangement of a material distributing and batching device, optimization of a rotary kiln lining, building of a waste heat recovery and tail gas utilization system, additional arrangement of an oxygen enrichment device, additional arrangement of a CO2 trapping system and the like); calcium oxide (the purity is greater than or equal to 97%), calcium carbonate (the purity is greater than or equal to 98%) and sulfur (the purity is greater than or equal to 99%) are synchronously prepared under the condition of 1300 + / -10 DEG C to 1350 + / -10 DEG C through the steps of pretreatment, precise feeding, calcination reaction and the like. According to the method, full-amount resource utilization of the solid waste gypsum is achieved through existing cement kiln equipment, the investment and operation cost is reduced, the comprehensive energy consumption is reduced by 30% or above compared with a traditional process, the sulfur market gap is made up, and the cement kiln utilization rate is increased.
Owner:CARBON SILVER (HEBEI XIONGAN) NEW ENERGY TECHNOLOGY CO LTD