338results about How to "Improve granulation effect" patented technology

The invention provides a process technology for granulating blast-furnace slag and utilizing waste heat. The process technology is characterized by comprising the following steps of: performing primary cooling and triple granulation on high-temperature molten slag from a blast furnace in a slag primary cooling device to form fine granules with diameter of less than 3mm and temperature of about 800-1,000 DEG C; discharging the fine granules through a high-temperature slag discharge valve; entering a slag basket and conveying to the upper part of a slag secondary cooling device; falling to the lower part of the slag secondary cooling device along a plurality of layers of baffle heat exchange components which are arranged in the slag secondary cooling device; and cooling to about 200 DEG C and discharging through a low-temperature slag discharging valve, wherein waste heat of normal pressure steam of 200 DEG C can be recovered by the slag primary cooling device; and waste heat of hot circulating air of over 600 DEG C can be recovered by the slag secondary cooling device. The invention provides equipment for granulating blast-furnace slag and utilizing waste heat. The equipment mainlycomprises the slag primary cooling device, the slag secondary cooling device, a waste heat boiler and the like. The process technology and the equipment have the advantages of good granulation effectof the molten slag, small and uniform size of slag granules, almost zero new water consumption and low environmental pollution.

The invention discloses an afterheat recovery system and an afterheat recovery method of dry granulating liquid slag. The system comprises a granulating cabin, a moving bed and an afterheat recovery system, the inner surface of the granulating cabin is provided with a granulating cabin water cooling wall, the center of the top of the granulating cabin is provided with a slag pipe, the slag pipe extends into the granulating cabin, the lower part of the tail end of the slag pipe is provided with a centrifugal granulator, the centrifugal granulator is connected with a motor arranged at the lower part of the centrifugal granulator, the lateral side of the centrifugal granulator is provided with an air supply pipeline, an annular air opening is formed between the centrifugal granulator and the air supply pipeline, the lower part of the granulating cabin is provided with the moving bed, the inner surface of the moving bed is provided with a moving bed water cooling wall, the top of the moving bed is provided with an air outlet, the bottom of the moving bed is provided with a slag discharge device, an air inlet device is arranged above the slag discharge device, the afterheat recovery system comprises a primary dust remover, an afterheat boiler, a secondary dust remover, an exhaust fan and a chimney which are connected in sequence, and the primary dust remover is connected with the air outlet arranged at the top of the moving bed. The system and the method effectively solve the problems of heat recovery and furnace slag granulation of equipment such as a blast furnace.

The invention relates to liquid blast furnace slag granulation method and device thereof, belonging to the technical field of blast furnace utilization in the metallurgy industry. The device comprisesa diversion trench, a slag dropping hole, a granulation device, two or more granulation nozzles and a slag discharging hole. The invention realizes dry process quenching granulation adopting high-speed gas and solid phases carrying solid granules as granulation media, impacting liquid blast furnace slag to crushing, and quenching and solidifying into small granules. In the granulation device, thediversion trench is built by refractory materials and is arranged at the top of the granulation device, the lowest point of the diversion trench is provided with the slag dropping hole which is communicated with the granulation device, the upper part of the granulation device is provided with the granulation nozzles, and an included angle between the outlet axes and the vertical direction of thegranulation nozzles is more than 0 degree and is less than or equal to 90 degrees. The granulation nozzles can be arranged at one side or are symmetrically arranged or circularly arranged by using a center perpendicular line of the slag dropping hole as the center of a circle. The invention strengthens the granulation effect and lowers the power consumption and the equipment investment of the granulation device by utilizing the capacity of crushing the liquid blast furnace slag by a gas-solid two-phase strong jet flow.

The invention relates to a high-ore-matching-ratio brown iron ore sintering technology. The weight ratio of brown iron ore and powdered iron in raw material proportion is (5-19):1, the moisture content of the first mixing is controlled to be 7%-8%, the mixing time lasts for 2-3minutes, and the temperature of the mixture is 50-62 DEG C; the moisture content of second mixing pelletizing is controlled to be 7-9%, the pelletizing time lasts for 2-3.5minutes, and the temperature of materials is 52-65 DEG C; the thickness of grate-layer materials in distribution is 20mm, and a sintering material layer is 780-900mm thick; the ignition temperature for sintering is1050-1150 DEG C, and the ignition time lasts for 1.8-2.2minutes; and the negative pressure for sintering is 12-15kpa, the machine speed is 0.9-1.2m/min, the vertical sintering speed is 29-34mm/min, the air leakage rate is no more than 40%, the cooling negative pressure is 11-14kpa, the temperature of a cooling section of a sintering machine is reduced to 250 DEG C below. By using the high-ore-matching-ratio brown iron ore sintering technology, energy is saved, consumption is reduced, cost is decreased and benefit is increased.

A method for intensifying limonite sintering has the advantage of changing the property of the moisture of the mixture by adding sucrose solution with weight concentration being 4-10%. The solution has certain viscosity which is reduced with the increase of the temperature. In the processes of mixing and granulating, the mineral powder with fine grains is well adhered to the surfaces of pellets, thus intensifying limonite granulating, improving the intensity of the pellets of the mixture and achieving the aims of intensifying limonite sintering, improving the quality of sintered minerals and reducing solid fuel consumption. The method has better effects especially on the limonite with finer grain sizes. The sucrose has the greatest characteristic of totally reacting in the process of sintering and leaving no residues in the sinter, thus having no impact on the quality of the sinter.

The invention discloses a slag buffering system with a flow control function. The slag buffering system comprises a slag ladle shell, stopper rods, stopper rod control mechanisms and slag falling pipes. A slag inlet is formed in the upper portion of the slag ladle shell, and a plurality of water openings are formed in the bottom of the slag ladle shell. The slag falling pipes with flow meters are arranged at the lower portions of the water openings. Each water opening is correspondingly provided with a stopper rod. The stopper rods are arranged over the corresponding water openings. The stopper rod control mechanisms are used for controlling the circulation area between the stopper rods and the water openings. Slag flows into a slag ladle from a slag inlet above the slag ladle and is stored in the slag ladle, and the slag flows out of the slag falling pipes from the water openings in the bottom of the slag ladle. The flow of the slag is controlled by controlling the circulation area through cooperation of the stopper rods and the water openings. The flow meters are arranged on the slag falling pipes to detect the flow of the slag, and detection signals are fed back to the stopper rod control mechanisms. According to the slag buffering system, the temporary slag storage function and the flow control function are achieved, the following pelletization process can be continuously and stably conducted on the slag, and the slag buffering system can be widely applied to a slag pelletization waste heat recycling system.

The invention discloses a recovery method of steel slag residual heat and system thereof. The system is composed of a steel slag flow distributor, a water-cooling granulation wheel, a first fluidized bed, a weigher, a vibration sieve, a hot slag particles bunker, a second fluidized bed, a dedusting device, a blower and a residual heat boiler in sequence. The method is that, pouring high-temperature liquid slag into the steel slag flow distributor, the steel slag flown out of the steel slag flow distributor falling onto the water-cooling granulation wheel and being crushed and throwing out to fall into the first fluidized bed for exchanging heat with air, hot slag particles discharged from the first fluidized bed is stored in the hot slag particles bunker after going through the weigher and the vibration sieve, and discharging when the temperature is cooled to 350 DEG by a heat exchanger of the second fluidized bed. High-temperature air discharged from the first fluidized bed and the second fluidized bed enters the residual heat boiler for exchanging heat after dedusting. The invention can reduce energy consumption in steel production, graining effect of the steel slag is good, which is benefit for following degradation of free CaO and magnetic separation of wasted steel.

A sinter mixture granulating method comprises following steps: 1) a blending ore is applied as a granulating raw material; 2) the blending ore is segmented into two parts according to a particle fraction of 3.0-4.0 mm. The blending ore whose particle fraction is less than 3.0-4.0 mm is subjected to a primary and a secondary mixing granulation with other conventional ingredients of preparing a sinter mixture. 3) the particles obtained from the secondary mixing granulation are added into the blending ore having the particle fraction greater than 3.0-4.0 mm obtained by the segmentation before, and subjected to a tertiary mixing granulation. The method can improve granulating effects for the sinter mixture, improve permeability of a material layer in a sintering process, optimize a sintering state and reach an ideal producing technique index finally.

The invention relates to the steel slag recovery and reclamation processing technology. The invention provides a disruption method of converter steel slag, which is characterized in that the steel slag is poured into a dross box in a hot slag splashing workshop under the temperature of 1050 to 1150 DEG C, little water is sprayed to reduce the temperature, after an isolation layer is formed, the slag is poured and water is sprayed continuously time and again, and then the broken steel slag is obtained after warming up stuffily. The steel slag processed through the method of the invention has the advantages of good graining effect and performance, and the method and the process are advanced, the investment on the system is low, the operating cost is low, and the economic effect is obvious.

The invention provides a mixing method for sintering production. The mixing method comprises the following steps that 1, iron ore powder, solvent and fuel are conveyed into a strong mixing machine, water is added, and mixing of the first stage is carried out; 2, the material obtained after mixing of the first stage is conveyed into a first cylinder mixing machine, water is added, and mixing of the second stage is carried out; 3, the material obtained after mixing of the second stage is conveyed into a second cylinder mixing machine or a cylinder pelletizer, water is added, mixing of the third stage is carried out, and a mixed material is obtained. By the adoption of the vertical strong mixing machine, the occupied area can be reduced, moreover, the sintering strength of sintered ore can be improved, the yield of the sintered ore is increased, energy is saved, emission is reduced, and multiple advantages are brought to increase of profits of sintering factories.

The invention provides a method for improving the quality of high-chromium vanadium and titanium sinter and belongs to the technical field of ferrous metallurgy. The method mainly comprises the steps that sintering return mines, high-chromium vanadium and titanium concentrate fines, ordinary iron ore concentrate powder, boron iron ore concentrate, metallurgical lime, magnesite, coke powder and other sintering raw materials are subjected to secondary atomization injection and blowing blending, wetting and pelletizing at a certain proportion; then distribution, ignition and sintering are conducted; and finally grain settlement and screening are conducted to obtain the high-chromium vanadium and titanium sinter good in metallurgical performance. The method has the characteristics of being simple in process, high in raw material adaptability, high in production efficiency, low in cost and the like. The quality of the high-chromium vanadium and titanium sinter and the sintering production efficiency can be improved remarkably; the method has important realistic significance for development and utilization of the high-chromium vanadium and titanium sinter and has wide application prospects.

The invention relates to the field of medicinal preparations, and particularly relates to racecadotril granules and a preparation method thereof. The racecadotril granules are prepared from the following raw materials by weight: 0.1-2 parts of racecadotril, 93-99 parts of an excipient, 0.02-2 parts of a corrigent, 0.01-0.1 part of an adhesive and 0.05-1 part of a suspending agent. The racecadotril granules are prepared by suspending racecadotril in the adhesive and dissolving partial sucrose in the adhesive, so that bitter taste of a drug can be covered. The prepared racecadotril granules have relatively good granulation effect, and increase compliance of children.

The invention discloses organic-inorganic compound fertilizer capable of improving a soil environment. The fertilizer is prepared from raw materials in parts by weight as follows: 20-40 parts of urea, 5-15 parts of calcium ammonium nitrate, 10-20 parts of precipitated phosphate fertilizer, 6-16 parts of monopotassium phosphate, 10-20 parts of potassium sulfate, 40-60 parts of fermented chicken manure, 5-15 parts of fermented pig manure, 2-6 parts of bamboo powder, 2-8 parts of shell powder, 10-20 parts of tapioca flour, 5-15 parts of corncobs, 4-8 parts of modified fly ash, 5-12 parts of oil shale powder, 2-4 parts of montmorillonite powder, 2-6 parts of borax, 1-2 parts of sodium silicate, 0.5-1.5 parts of ammonium molybdate, 0.4-0.9 parts of zinc carbonate, 0.1-0.8 parts of magnesium sulfate and 0.5-2 parts of sodium naphthalene acetate. The fertilizer contains very rich nutrients and can decrease the release speed of organic nutrients, effectively enhance soil fertility, effectively improve the soil structure and make hardened soil loose.

The invention provides a general flavanone capsule of desmodium styracifolium and a preparation method and application thereof, wherein the general flavanone capsule of the desmodium styracifolium comprises total flavanone of the desmodium styracifolium, which is an alcohol extract of the desmodium styracifolium, and pharmaceutically acceptable medicinal excipients. The general flavanone capsule of the desmodium styracifolium disclosed by the invention has the characteristics of being explicit in effective material basis, controllable in quality standard, good in drug dissolution degree, good in quality stability, significant in pharmacology and drug efficacy, less in dosage, safe and convenient to take, and completely applicable to industrial massive production.

The invention discloses a method for increasing grade of sinter, belonging to the metallurgy industry field. The method is used in the production technology of the sinter as follows: in a primary mixing step, roasted flux is used for replacing the existing raw flux in raw materials which comprises the following components according to weight percentage: 70-85% of iron-bearing raw material, 4-6% ofcalcined lime with 75-81% of CaO, 2.5-4.5% of calcium carbide with 65-70% of CaO, 6-8% of slaked lime with 52-54% of CaO, 1-1.5% of light burning magnesium oxide powder with 80-95% of MgO and 3-5% ofSiO2, 5-7% of pulverized coal or coke powder and 30-32% of return fines. The method can effectively increase the grade of sinter and reduce the production cost.

The invention belongs to the field of medicine, and discloses a spirulina tablet. The spirulina tablet comprises following ingredients, by weight, 75 to 88% of spirulina powder, 4 to 10% of xylooligosaccharide, 4 to 10% of isomaltulose, 0.5 to 2% of hydroxypropyl methyl cellulose, 0.5 to 1% of polyethylene glycol 6000, 2 to 5% of carboxy methyl starch, and 0.2 to 1% of magnesium stearate. According to the spirulina tablet, hydrophilia of xylooligosaccharide, isomaltulose and polyethylene glycol 6000 are used; a preparation method is optimized; a common problem of existing spirulina tablet products that disintegration parameters are not qualified is taken as a key point, and is solved. In addition, the spirulina tablet is smooth in surfaces, is stable in quality, is convenient for carrying and taking, and is capable of improving immunity.

The invention discloses a centrifugal slag granulation and waste heat recovery system. A 'dry-type' treatment method is adopted for slag, and a large quantity of water resources can be saved. According to the centrifugal slag granulation and waste heat recovery system, high-temperature slag is subjected to segmented heat recovery, and the first segment is primarily cooled in a water-cooled wall mode at first; and meanwhile the high-temperature slag is subjected to slag throwing treatment with a slag throwing structure, cold slag and hot slag can be mixed in the slag throwing process, adhesionof the hot slag is prevented and meanwhile agglomeration can be facilitated. By means of the centrifugal slag granulation and waste heat recovery system, after the high-temperature slag is subjected to the first segment of slag throwing agglomeration and heat recovery, the second segment of ball-milling tank heat recovery and crushing procedure is conducted; and meanwhile the absorbed heat is conveyed to a steam boiler and used for generating steam. By adoption of the centrifugal slag granulation and waste heat recovery system, the heat recovery efficiency of the slag is improved, and the pelletization effect of the slag is effectively improved. The first segment of heat recovery and the third segment of heat recovery are series-connection low-temperature heat recovery, and the heat recovery efficiency is effectively improved through segmented recovery of the heat.

The invention discloses a preparation method of polyethylene wax micropowder. The preparation method comprises the following steps of: (1) melting and conveying raw materials, i.e., polyethylene wax feed liquid is prepared by adopting a heating device, the polyethylene wax feed liquid is conveyed to an atomizer inside a spray granulation tower by using a heat-insulation gear pump through a pipeline, and the pipeline and other parts of the atomizer, except a spray hole, need to be subjected to integral heat insulation; (2) compressing and atomizing air, i.e., compressed air provided by an air compressor is conveyed into the atomizer through another pipeline and is matched with the polyethylene wax feed liquid with the pressure, the polyethylene wax feed liquid is sufficiently atomized, and the atomized fogdrops are cooled and solidified into micropowder in the granulation tower; and (3) collecting a product, i.e., the cooled and solidified micropowder is collected by using a collecting device to obtain the product. The invention further discloses a spray granulation system which is used for preparing the polyethylene wax micropowder. The preparation method disclosed by the invention is low in energy consumption, simple and convenient to operate and safe and reliable; and the prepared product has small granularity.

The invention relates to a new additive for iron ore sinter, which can greatly improve sintering granulating effect, increase sintering mineralization rate and strength, lower production cost, and improve production efficiency. The invention is characterized in that the new additive for iron ore sinter is composed of 60% of calcium oxide, 2% of silicon dioxide, 2% of Al2O3, 4% of magnesia, 1% of ferric oxide, 1% of calcium chloride and 30% of calcium carbonate. The above materials are uniformly mixed, and then free moisture is dried by a vapor dryer, the water content is 49%, finally, the materials fine grinded by a globe mill to form the new additive for iron ore sinter. The invention can improve the production of sintering granulating 3mm to 5mm granulation pellet from 24% to 36.7%, the fine granulation is reduced obviously, the sintering granulating effect is improved significantly, the sintering mineralization rate and strength are increased notably, thereby lowering production cost and improving production efficiency.

This invention discloses low-temperature amalgam for round exhaust. The low-temperature amalgam is composed of: Sn 15.5-79.5 wt.%, Sb 0.5-20 wt.%, Zn 0-20 wt.%, Cu 0-5 wt.% and Hg 18-60 wt.%. Compared with present techniques, the low-temperature amalgam in this invention has such advantages as accurate spherical body, high surface hardness and mechanical hardness, high melting point, difficult Hg volatilization and precipitation, smooth rolling and high friction tolerance, and is suitable for manufacturing lamp using round exhaust with satisfying photoelectric indexes.