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64 results about "Pellet Product" patented technology

Method for utilizing iron containing metallurgical dust

The invention relates to a method for utilizing iron containing metallurgical dust, which comprises that: steel-making sludge, metallurgical dust-removing powder and iron scale are mixed; the mixed raw materials are sent into a rotary kiln and dried, and the drying temperature is determined according to moisture content of the raw materials and controlled to be between 300 and 500 DEG C; the dried materials are cooled by a cooler, the cooled materials are added with 5 to 10 percent of caking agent by weight, and the material and the caking agent are fully stirred evenly by a wheel-rolling mixer; and finally, the mixture is pressed into cooled agglomerated pellet products by a twin-roller machine, the pressure of the twin-roller machine is more than or equal to 500 Kg/cm<2>, and the cooled agglomerated pellet products are prepared into finished products after separation by a vibration sieve. The method has the advantages of low production energy consumption, high product strength, low moisture content and good quality, and can realize full effective utilization of resources; and the finished products of cooled agglomerated pellets can be directly used as a cooling agent and a slag former in steel making, can improve smelting effect and achieve functions of cooling and slag forming, and can be also used for blast furnace process.
Owner:SHAOGUAN QUJIANG SHENGDA EQUIP & MATERIALS

Method for reinforcing preparation and reduction of carbon-containing pellets in iron ore

The invention relates to a method for reinforcing preparation and reduction of carbon-containing pellets in iron ore. The method for reinforcing preparation and reduction of the carbon-containing pellets in the iron ore comprises the following steps that (1) the iron ore, a reducing agent, a bonding agent and an additive are prepared according to a certain proportion; (2) prepared mixtures are sent into a ball mill to be crushed, fine ground, evenly mixed and the like, so that fine-sized evenly-mixed materials are obtained; (3) pelletizing or briquetting is conducted by means of the fine-sized evenly-mixed materials, so that the carbon-containing pellets in the iron ore are obtained; and (4) the prepared carbon-containing pellets in the iron ore are subjected to reducing roasting treatment, and thus metallized pellet products can be obtained. According to the method for reinforcing preparation and reduction of the carbon-containing pellets in the iron ore, in the way that the raw materials including the iron ore, the reducing agent, the bonding agent, the additive and the like enter the mill simultaneously after being prepared, the dual effects of fine grinding and sufficient and even mixing of the raw materials are achieved at the same time in the single ore grinding procedure, and the procedure links of fine grinding raw materials separately in advance, then preparing the raw materials in proportion and finally conducting even mixing of traditional operation are greatly simplified; and the quality of the carbon-containing pellets in the iron ore is remarkably improved, and the subsequent reduction process is reinforced.
Owner:CENT SOUTH UNIV

Trimetazidine dihydrochloride sustained control release pellet and preparation method thereof

InactiveCN102133195AUniform sizeHigh true sphericityOrganic active ingredientsPharmaceutical non-active ingredientsTrimetazidine DihydrochlorideControlled release
The invention relates to trimetazidine dihydrochloride sustained control release pellet and a preparation method thereof. The sustained control release pellet structurally comprises a blank pellet core, a trimetazidine dihydrochloride medicine layer and a sustained control release coating layer from inside to outside; the preparation method comprises the following steps: preparing the blank pellet core by a centrifugal coating pelletizer, putting the blank pellet core in the centrifugal coating pelletizer under a motion state, then spraying mixed liquor of adhesive and wetting agent by a spray gun until the blank pellet core is wetted, uniformly spreading the raw trimetazidine dihydrochloride on the wetted blank pellet core through a powder supplying device to obtain a medicine-containing pellet, and carrying out sustained control release coating on the exterior of the medicine-containing pellet, thus obtaining the trimetazidine dihydrochloride sustained control release pellet. The invention is suitable for preparing the trimetazidine dihydrochloride sustained control release pellet, the preparation process is simple, and a prepared pellet product is scientific and reasonable in structure, uniform in granularity and good in release degree.
Owner:王国栋

Method for preparing oxidated pellets from pure hematite concentrate

A method for preparing oxidated pellets from pure hematite concentrate includes the following steps: after the hematite concentrate is preprocessed until the specific surface area is larger than or equal to 1300cm2.g-1, compound additive which accounts for 0.5 to 1.6 percent by weight of the total amount of hematite concentrate is added, damp milling is then carried out, pelletizing, drying, preheating and roasting are sequentially carried out after damp milling, and thereby the finished oxidated pellet product is obtained. The compound additive is the mixture of humic acid, calcium peroxide and paigeite, the mixture is ground to the grain size of negative 0.074mm after mixing, and the percentage by weight is not lower than 95 percent. The method solves the problems in the preparation of oxidated pellets from the hard-to-pelletize, hard-to-roast hematite concentrate, such as poor pellet quality, high preheating and roasting temperatures, long time, low finished pellet product strength. The method is simple, the quality of the prepared hematite concentrate pellets is high, the preheating and roasting temperatures are low, the time is short, and the method is suitable for the preparation of the oxidated pellets from the hematite concentrate, particularly the preparation of the oxidated pellets from hard-to-pelletize, hard-to-roast spiegeleisen concentrate. The method can realizeindustrialized production.
Owner:CENT SOUTH UNIV

Preparation method of mesophase carbon microspheres with different particle sizes

The invention relates to a preparation method of mesophase carbon microspheres with different particle sizes. Green pellet products of the mesophase carbon microspheres are obtained by adding asphalt type substances containing high quinoline insoluble matters and high toluene insoluble matters into asphalt, adjusting the composition of raw materials, and performing solvent extraction, filtration, separation and drying on a condensation polymerization reaction product. The preparation method disclosed by the invention has the advantages of simple preparation of the raw materials, low price, high yield of the mesophase carbon microspheres, uniform particle size distribution, and adjustable and controllable particle size. In addition, the byproduct asphalt can be used as soaker asphalt or can be used for preparing spinning asphalt with a high softening point, and the problems of low value of the byproduct and further influence on the cost of the carbon microsphere products can be solved. An extraction, separation and pre-drying integrated process has the advantages of reducing investment in equipment and instruments, shortening process flows, being easy to produce and operate, realizing the closed separation process and being environment-friendly.
Owner:BAOWU CHARCOAL MATERIAL TECH CO LTD

Method for producing metallized pellets through iron mine tailings

The invention relates to a method for producing metallized pellets through iron mine tailings. The method mainly comprises the following technology steps that a powder depolymerization and scattering machine is adopted for crushing and scattering the caked iron mine tailings; the iron mine tailings and dried iron containing dust mud are mixed according to the proportion of 1:9-3:7; 1-4% of bentonite and 0-5% of coked dust removing ash or pulverized coal are prepared in the mixture in the second step, and sufficient uniform mixing is conducted through a powerful mixing machine; a certain proportion of water is added in the mixture, and 10-16 mm of green pellets are manufactured through a disc pelletizing machine; after being dried through a chain grating machine, the green pellets are conveyed to a rotary kiln or a rotary hearth furnace to be preheated and roasted at the high temperature, and metalized pellet products are finally obtained and serve as high-quality raw materials for blast furnace iron making or electric furnace steel making. According to the method, the iron mine tailing resource hard to treat is comprehensively utilized, meanwhile, the production cost of the iron containing dust mud metalized pellets is reduced, and very obvious economic benefits and environment benefits are achieved.
Owner:INST OF RES OF IRON & STEEL JIANGSU PROVINCE

Density control equipment for aquatic puffed pellet feed

The invention discloses density control equipment for aquatic puffed pellet feed. The equipment includes a cutting device, a buffer feeding device and a sealed pressurizing device, wherein the cutting device is used for cutting puffed pellet feed discharged from a puffing cavity into pellets; the buffer feeding device is used for buffering the falling pellets, and the sealed pressurizing device is used for performing pressurization, sealing and volume-weight increasing on the pellets falling in the sealed pressurizing device; the sealed pressurizing device comprises a sealed pressure stabilizing chamber, an impeller body, a spindle and a drive component; the lower end of the sealed pressure stabilizing chamber is provided with a discharge hole; a plurality of blades are arranged on the impeller body, and the blades are provided with sealing pieces matched with the sealed pressure stabilizing chamber; a pressurizing chamber is formed between every two adjacent blades; and a sealed pressurizing space is formed among a cutter housing, the buffer feeding device, the sealed pressure stabilizing chamber and the impeller body. According to the density control equipment for aquatic puffed pellet feed, positive pressure air is introduced into the sealed pressure stabilizing chamber to make pellet texture denser, the volume-weight is increased, and required heavy pellet products are finally obtained.
Owner:嘉兴润阳机械有限公司

Composite binder and powder pellet obtained through same

The invention relates a composite binder and a powder pellet obtained through the same, in particular to a binder used for preparing a powder pellet, especially a magnesium oxide pellet binder, and the pellet of the binder. The composite binder and the powder pellet are characterized in that the composite binder comprising sodium carboxymethylcellulose, humic acid, corn starch, acrylic resin, syrup, polyvinylpyrrolidone, polyacrylamide, sodium silicate and slaked lime is prepared; a magnesium oxide powder raw material is mixed with the composite binder to obtain a mixed material; then the mixed material is subjected to pellet pressing, drying and sintering, and then a finished pellet product is obtained; and the magnesium oxide powder raw material is high-purity magnesium oxide, and the MgO chemical component of the magnesium oxide powder raw material is larger than 92 wt%. The powder pellet or the magnesium oxide pellet obtained through the composite binder is high in strength and not prone to being broken in the electric smelting process, the preparation technology is simple and can be directly applied to industrial mass production, and furnace condition deterioration and environmental pollution which are caused by the fact that powder directly enters a furnace are avoided; and the magnesium oxide pellet prepared through the binder can be directly used for preparing electric smelting magnesia.
Owner:EAST CHINA UNIV OF SCI & TECH

Pelleting device for processing food

The invention relates to a pelleting device for processing food. The pelletinng device comprises a feeding hopper, wherein a stirring shaft which is driven by a motor to rotate is inserted into the feeding hopper, a forming plate with a plurality of cylindrical holes is arranged below the feeding hopper, a box body is arranged below the forming plate, a left circle formation template and a right circle formation template which are driven by an air cylinder are respectively arranged on the left side and the right side in the box body, the left side wall and the right side wall of the box body are respectively provided with a plurality of knocking blocks, the lower end of the box body is provided with an oblique bottom surface, a plurality of impurity drain holes are formed in the oblique bottom surface, a waste chute is arranged below the box body and below the impurity drain holes, a circle formation discharging opening is formed below the box body, a curing rotation box is arranged below the circle formation discharging opening, and a heating layer is arranged at the outer side of the curing rotation box. The pelleting device is simple in structure and reasonable in design; not only can the product quality be improved, but also the circle formation rate is high, and a product is not prone to scatter. The pelleting device is suitable for producing different pellet products and also can be used for producing dumpling stuffing.
Owner:DALIAN DONGLIN FOOD

Preparation method of hollow pellet containing boron zirconium alloy burnable poison

ActiveCN103160706AIncrease fuel consumptionSolve technical problems that are difficult to form with steel moldsOptical rangefindersNuclear energy generationZirconium hydrideSuperhard material
The invention provides a preparation method of a hollow pellet containing boron zirconium alloy burnable poison. The method is as below: mixing boron carbide particles with size less than 5mum with a zirconium hydride-2 powder; pressing the mixture by a steel mold into a hollow pellet blank; and conducting dehydrogenation sintering and machining on the hollow pellet blank, so as to prepare a hollow pellet product containing boron zirconium alloy burnable poison. The hollow pellet containing boron zirconium alloy burnable poison prepared by the method provided by the invention has thickness less than 2mm, density higher than 95% and opening pore rate less than 2%, satisfies relevant technological requirements of pellet containing boron zirconium alloy burnable poison used in reactors; the method solves a technical problem that a powder containing a superhard material is difficult to be molded by a steel mold, and greatly improves molding precision and utilization rate of pellet containing superhard particle material; and compared with rubber molding preparation of a solid boron carbide zirconium alloy combustible poison pellet, the method reduces consumption of the raw material zirconium hydride by more than 60%.
Owner:NUCLEAR POWER INSTITUTE OF CHINA

Method for directly reducing and producing metallized pellets by utilizing sensible heat of high-temperature oxidized pellets

The invention belongs to the technical field of metallurgy, in particular to a method for directly reducing and producing metallized pellets by utilizing sensible heat of high-temperature oxidized pellets. The method comprises the following steps: preparing high-temperature oxidized pellets by adopting a single-chain grate-rotary kiln process, and utilizing the sensible heat of the high-temperature oxidized pellets to directly carry out reduction reaction with a reducing agent (coals); then, adopting normal-temperature reducing coal to carry out heat exchange and cool, and obtaining metallized pellet products and a dried reducing agent (including destructive distillation cokes) after magnetic separating. The method can be used for recycling the destructive distillation cokes and recycling high-purity coal gas; the recycled destructive distillation cokes can be used as a reducing agent; the high-purity coal gas can provide energy resources for an oxidized pellet rotary kiln and a muffle type deep-reduction rotary kiln without additionally introducing energy resources for heating. The method can reduce coal consumption by 40%-60%; and the burnt high-purity coal gas can be used for reducing carbon emission, saving energy and protecting environment.
Owner:泉州寰锋冶金技术有限责任公司

Method for reducing high-density metallized pellet

The invention relates to a method for reducing a high-density metallized pellet, belonging to the technical field of metallurgy. The method comprises the following steps: (1) preparing a pellet by proportionally and uniformly mixing iron ore powder to be reduced, carbon powder to be contained and a bonding agent; (2) preparing a material to be reduced by proportionally mixing the pellet and a reducer; (3) putting the material to be reduced into a reduction container, then transferring into a reduction kiln, and performing reduction reaction at 1220-1260 DEG C for 6-8 hours; and (4) after the reaction, naturally cooling the material in a kiln car to 200 DEG C, separating the reducer tailing and the metal pellet, performing surface sanding, and cleaning to obtain the high-density metallized pellet product of which the density is 3.8-4.2 t / m<3>. According to the method provided by the invention, the original kiln reduction operation is not changed, the reduced iron does not need to be crushed and subjected to cold briquetting, the production cost can be lowered, the energy consumption can be reduced, the steel making application is facilitated, the production process is stable, and the metallization rate is improved. Thus, the method provided by the invention has favorable application prospects.
Owner:江苏靖隆合金钢机械制造有限公司
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