80results about How to "Improve sintering yield" patented technology

Provided is an additive composition for metal sintering, which comprises an alkali metal compound that is added together with calcium carbonate constituting a melting accelerator for lowering the melting point in the process of sintering iron ore or the like, in such a way as to be able to economise on a heat source such as coal or coke which is necessary for the sintering of the iron ore, reduce the melting point of the sintered ore and enhance sintering efficiency by means of a chemical mechanism wherein the additive composition is additionally used together with the alkali metal compound during the sintering of the iron ore; the alkali metal compound being one or more compounds selected from the group consisting of lithium(Li), potassium(K), and sodium(Na).

The invention discloses a negative micropressure ignition system for a sintering machine bellows. A trolley is located over the upper end of the bellows, an igniter is separately arranged over the top of the trolley, the upper part of the bellows is opposite to the lower end of the trolley via a duct, and the lower part of the bellows is connected with the upper part of a bellows pipe through a first graphite packing. A vibrating motor is mounted on one sidewall of the bellows pipe, an observation hole with an observation hole cover is arranged at the middle of the bellows pipe, the upper end of a double-layered cindervalve is connected with the lower end of the bellows pipe through a second graphite packing, and the lower end of the double-layered cindervalve is connected with a discharge pipe through a third graphite packing. A wear-resistant bellows-connecting pipe which communicates with the cavity of the bellows pipe is mounted on the other sidewall of the bellows pipe, and is connected with one end of a wear-resistant elbow through connecting flanges, the other end of the wear-resistant elbow is connected with the upper end of a vertical connecting pipe through a resistance balance valve, and the lower end of the vertical connecting pipe is connected with an axial air duct and a big flue through a cover. The negative micropressure ignition system can realize gas-material separation, effectively control the sintering thickness of sinter, increase the grade of sinter and reduce the production cost.

The invention discloses a low-carbon low-emission sintering method based on coupled injection of multiple gases. Based on the difference of heat storage capacities of parts at the heights of differentmaterial layers, areas from thermal insulation completion to a waste gas temperature rising point of a material surface of a sintering machine are sequentially divided into a low heat storage capacity area, an intermediate heat storage capacity area and a high heat storage capacity area according to the temperature intervals smaller than 1250 DEG C, 1250-1300 DEG C and 1300-1350 DEG C, and high heating value gas with the injection heating value being larger than 30 MJ/Nm<3>, an intermediate heating value gas with the injection heating value being 15-30 MJ/Nm<3> and low heating value gas withthe injection heating value being smaller than 15 MJ/Nm<3> are separately injected to the three areas. The low-carbon low-emission sintering method effectively couples the differences between the heating capacity requirements and the gas quality of different areas of the sintering material layer, realizes heating capacity balanced distribution of the material layers at different heights, forms a beneficial ore-forming condition, greatly improves the sintering quality and the quality index, meanwhile, effectively expands the coverage area of gas injection, further reduces the solid fuel consumption, increases the emission reduction ratio of pollutants such as NOX, SO2 and COX, and realizes the low-carbon low-emission sintering.

The invention relates to a method for manufacturing a high-power annular inductor, comprising the following steps: manufacturing an annular magnetic core, manufacturing an inductance coil and assembling to obtain a finished product. The high-power annular inductor manufactured by adopting the method comprises the annular magnetic core and the inductance coil. The annular magnetic core comprises more than three semi-arc shaped magnetic blocks along the circumference, wherein each semi-arc shaped magnetic block is equally divided into upper and lower halves; the surface of each semi-arc shaped magnetic block is coated with an insulating layer with a thickness of 0.2-0.5mm; the joints of the combined upper and lower semi-arc shaped magnetic blocks are arrayed in a mutual staggered way; the inductance coil is a spiral ring coil winded from a hard wire; the spiral ring coil is combined together with the semi-arc shaped magnetic blocks; and the annular magnetic core is sleeved coaxially and impregnated and cured into the whole product. The method overcomes the problems that the powdery magnetic core of the traditional annular inductor is restricted in size and can not be made from the large-area hard wire, the annular inductor is enabled to develop towards high power, and the requirement on the inductance inductor in the modern power electronics field is met.

The invention relates to a self-aligning sintering clamp and method for a semiconductor laser chip. The clamp comprises a pedestal, a guide rail support, and a press block. The pedestal is provided with a positioning card slot matched with a heat sink. Two sides of the press block are provided with symmetric positioning racks. The guide rail support is vertically disposed on the pedestal, and is provided with symmetric suspension arms. The interior of each suspension arm is provided with a positioning guide rail. The positioning racks of the press block can be sleeved by the positioning guide rails, and move up and down in the positioning guide rails. The bottom end of the press block is provided with a press column. When the press block moves downwards, the press column compresses a chip on the heat sink. The invention also provides the method for sintering the semiconductor laser chip through the above clamp. The clamp is simple in structure, is low in cost, can achieve the self-aligning, and is convenient for operation and observation. The method can achieve the quick batch sintering of the semiconductor laser chips and heat sinks, and remarkably improves the sintering yield of the clamp.

The invention discloses an automatic control method for the water content of a sintering mixture and belongs to the technical field of sintering. The automatic control method includes the specific steps that S100, the water content of a mixture in the first mixing process is controlled, and a target water content H1 is firstly set; it is detected that the water content of the mixture after first mixing is H'1; and when |H'1-H1|>=0.1%, the water adding amount in the mixture sintering correcting process is W'1; and S200, the water content of the mixture in the second mixing process is controlled, and a target water content H2 is firstly set; it is detected that the water content of the mixture after second mixing is H'2; and when |H'2-H2|>=0.1%, the water adding amount in the mixture sintering correcting process is W'2. By adjusting the water adding amount W1 during first mixing and the water adding amount W2 during second mixing in the mixture sintering process, the total water adding amount W0 in the mixture sintering process is controlled. According to the automatic control method for the water content of the sintering mixture, the accuracy and objectivity of operation are improved, and the water distribution precision of the sintering mixture is improved.

The invention discloses a cutter blank forming technology of a ceramic surgical blade. The cutter blank forming technology of the ceramic surgical blade sequentially includes the following execution steps that firstly, slurry is ground, ball milling frequency is 30 Hz, and ball milling time is 24 hours; secondly, tape-casting slurry is prepared, and the viscosity is required to be 8000-12000 MPa.s; thirdly, a blank strip is prepared, the rotation speed of a tape-casting machine is 20 mm/min, and the thickness of the generated blank strip is 0.35+/-0.02 mm; fourthly, lamination isostatic pressing forming is conducted, multiple laminations are stacked at equal thickness, isostatic pressure is 25-30 MPa, and the water temperature is required to be 85+/-3 DEG C; fifthly, punching forming and sintering are carried out, sintering temperature is 1350-1380 DEG C, and sintering time is 2 hours; sixthly, appearance inspection is conducted. The cutter blank forming technology of the ceramic surgical blade is high in production efficiency, high in density, bending strength and Vickers hardness of the formed cutter blank, high in sintering yield and high in cutting edge sharpness.

The invention discloses a method for estimating the moisture content of a mixture on a sintering machine according to the water addition volume, and belongs to the technical field of sintering. The estimated moisture content of the mixture on the sintering machine is H3 which is calculated according to a formula which is shown in the description. By means of the method, the moisture content of themixture on the sintering machine in the later period can be estimated according to the water addition volume of the mixing process in the former period, operating personnel conveniently adjust the water addition volume in the sintering and mixing process according to the technological conditions of the moisture content of the sintering mixture, and then the water addition volume is conveniently optimized in the sintering and mixing process.

The invention discloses a vanadium tailings large-scale utilization and production method. The method includes the following steps that a, sintering raw materials are prepared; b, material mixing is conducted, wherein the prepared sintering raw materials are evenly mixed; c, pelletizing is conducted; d, the mixed sintering raw materials are distributed on a sintering pallet to be ignited and sintered, and sintered ores are made; e, a CaC12 solution is sprayed on the produced finished sintered ores through a spray system; f, the finished sintered ores are transported into a blast furnace to be smelt. Compared with an existing method, by means of the method, a low-melting-point sintering phase can be formed in the sintering process, the sintered ore phase structure is improved, the sinter product ratio is increased, the problems that it is difficult to conduct discharging, and discharging is uneven due to the fact that vanadium tailings are small in bulk specific weight and large in moisture can be effectively solved, the sintering material mixing accuracy is improved, the harmful element sulphur in the vanadium tailings can be removed in the sintering process, and secondary solid waste resource circulating and recycling are guaranteed. The problem of environmental pollution brought by long-time stacking of the vanadium tailings is further solved.

The invention discloses a pre-dechlorinating-sintering treatment technology for high-chlorine metallurgical waste and incineration fly ash. The technology comprises the processes that high-chlorine metallurgical dust sludge, waste incineration fly ash and carbonaceous fuel are mixed uniformly and then pressed into block masses after the water content is balanced by adopting chlorine-containing wastewater; the obtained block masses are arranged in an oxygen-deficient atmosphere to be subjected to roasting pretreatment, and roasting block masses are obtained; and the roasting block masses serveas an iron ore sintering bottoming material to participate in sintering. According to the technology, pollution of chlorine and dioxin in the solid waste sintering process is reduced through roastingpretreatment, resource utilization of components such as Fe, Ca and C in the solid waste such as the high-chlorine metallurgical dust sludge and the waste incineration fly ash is achieved, and meanwhile reuse of the chlorine-containing wastewater is achieved.

The invention discloses a high-performance strontium permanent magnetic ferrite preparation method. The method comprises 1, adding nanometer bismuth oxide, nanometer cobaltous oxide, nanometer zinc oxide and nanometer germanium oxide into nanometer strontium carbonate, nanometer ferric oxide, nanometer calcium carbonate and nanometer silica as raw materials, and carrying out sanding, 2, carrying out pre-sintering, 3, adding nanometer lanthana oxide, nanometer cerium oxide, nanometer gadolinium oxide, nanometer bismuth oxide, nanometer cobalt oxide, nanometer germanium oxide, nanometer zinc oxide, a grain boundary modifier, a dispersant, a coupling agent, nanometer cesium carbonate, nanometer aluminum oxide, nanometer calcium carbonate and nanometer silica into the pre-sintered product, carrying out mixing to obtain a uniform mixture, replacing strontium by lanthanum, cerium, gadolinium and bismuth, replacing iron ions by cobalt, zinc or germanium and carrying out sanding, 4, carrying cooling molding, and 5, carrying out sintering in a combustion furnace. The method greatly improves permanent magnetic ferrite saturation magnetization, magnet coercive force, remanent magnetism and stability.

A method for increasing the output of a sintering process comprises the following steps: dividing a sintering mixture into a first part and a second part; mixing quicklime with the first part to form a quicklime doped sintering mixture; laying the quicklime doped sintering mixture on a sintering support table to form a first sintering subbed on the sintering support table; laying the second part on the first sintering subbed to form a second sintering subbed on the first sintering subbed; and sintering a sintering bed formed through the stacking of the first sintering subbed and the second sintering subbed.

The invention discloses antioxidant nickel paste as well as a preparation method and application thereof. The anti-oxidation nickel paste comprises nickel powder, ceramic powder, an adhesive, a dispersing agent and a solvent, wherein the nickel powder is nickel oxide. According to the present invention, the nickel oxide is used for replacing nickel metal in the MLCC inner electrode slurry, so that on one hand, the problem that base metal is prone to oxidation is not considered, the upper limit value of the glue discharging temperature is widened, the high-temperature glue discharging is achieved, and decomposition of organic additives is promoted, so that the residual carbon rate after glue discharging of the MLCC is reduced, the oxidation problem in the glue discharging process of an inner electrode is reduced, and internal defects are reduced, an obvious positive effect on the improvement of the subsequent sintering yield and the improvement of the reliability is realized; and on the other hand, a finally obtained MLCC product can still keep good electrical performance.

The invention relates to sintered ore containing sintered fly ash balls. The sintered ore containing the sintered fly ash balls comprises the following raw materials in percentage by weight: 65 to 75percent of uniformly mixed ore, 15 to 20 percent of return ore, 3 to 6 percent of fuel, 5 to 10 percent of flux, 1 to 15 percent of sintered fly ash balls with the particle size being more than or equal to 3mm, and 0.05 to 0.98 percent of adhesive. The preparation method comprises the following steps of rolling sintered fly ash; preparing the sintered fly ash balls; uniformly mixing the uniformlymixed ore, the return ore, the fuel, the flux and the sintered fly ash balls with the particle size being not less than 3mm; sintering; conventionally cooling and screening; and preparing the sinteredore for later use. According to the sintered ore containing the sintered fly ash balls and the preparation method provided by the invention, the sintering fly ash can be comprehensively utilized, nopollution is caused to the environment, the cost is low, and the performance of the prepared sintered ore can meet the use requirement.

The invention belongs to the technical field of ferrite, and particularly relates to a manufacturing process of a special-shaped ferrite core. The manufacturing process comprises the steps of (1) conducting punch forming, specifically, selecting soft magnetic ferrite particle powder, and preparing a sealed blank or a connected blank designed by the process on a vertical forming machine or a high-speed rotary forming machine by adopting a mold in a bidirectional punching manner; (2) sintering; (3) cutting and grinding; (4) carrying out ultrasonic cleaning; and (5) inspecting. According to the process, the phenomenon that a conventional preparation method for preparing the special-shaped magnetic core element is prone to causing product deformation can be overcome, the thinking frame that the special-shaped magnetic core element can only be formed in a vertical pressing mode but cannot be formed in a side pressing mode is broken through, and the process is achieved through a density compensation method. The manufacturing process is easy to operate, convenient to process and easy to industrialize, the special-shaped magnetic core element with high dimensional precision can be manufactured, the percent of pass is greatly increased, the cost is saved, and the manufacturing process has high industrial utilization value and is worthy of popularization and application.

The invention discloses a sintering oxygen enrichment system. The sintering oxygen enrichment system comprises an oxygen production pressure adjusting station; medium-pressure oxygen is fed to a sintering factory through a pipe network after being adjusted the pressure by the oxygen production pressure adjusting station, and is conveyed to an oxygen adjusting valve through a pipe at the sintering factory; an oxygen flow meter is mounted in front of the oxygen adjusting valve; and then, the oxygen is conveyed to an oxygen quick cutting valve through a pipe, is conveyed to a gas mixer through a pipe, and is fed in two combustion assisting fans through pipes. The sintering oxygen enrichment system has the following beneficial effects: the sintering oxygen enrichment system facilitates to reduce the internal circulation reverse ore rate and increase the sintering yield, and can increase the sintering yield by above 10%; meanwhile, an oxygen-enriched ignition process is adopted to prominently improve the sintering ignition quality and to achieve obvious effects on increment of sintering ores, energy conservation and improvement of the product quality; and in addition, for sintering factories using blast furnace gas and difficult to obtain other calorific value gas to ignite, the oxygen-enriched ignition technology is adopted to also achieve prominent improvement effects.