498results about How to "Downgrade" patented technology

The invention discloses a vertical sinter ore cooling machine capable of efficiently recycling the sensible heat of sinter ores, which pertains to the technical field of sintering equipment and is used for preventing air leak in the cooling course of sinter ores and effectively recycling the sensible heat of the sinter ores. The technical proposal of the invention is that: the cooling machine consists of a feeding part, a cooling part and a conveying part; the cooling part comprises a vertical closed body, a hot wind pipeline, a blower, as well as a hopper, an upper sealing valve, a pre-storing chamber, a lower sealing valve, a heat exchanging chamber, a wind distributing board, an isopiestic wind chamber and a discharging channel which are in sequence arranged on the body from top to bottom; an annular wind chamber is arranged between the pre-storing chamber and the heat exchanging chamber; the annular wind chamber is communicated with the hot wind pipeline; the isopiestic wind chamber is communicated with the blower; and wind shields and ore falling openings are distributed evenly on the wind distributing board . The vertical sinter ore cooling machine has the following advantages of: 1. an air leak rate near to 0; 2. improved gas-solid heat exchange efficiency of the cooling machine; 3. raised quality of the recycled hot air; and 4. being beneficial to increasing the utilization rate of exhaust-heat boilers. Based on the advantages, the vertical sinter ore cooling machine is expected to be used commonly as an upgraded replacement of the existing sinter cooling machine.

The invention relates to a CrNiMo high-strength pinion steel and a preparation method thereof. The pinion steel comprises the following chemical components in percentage by mass: 0.19%-0.25% of C, 0.17%-0.37% of Si, 0.70%-1.00% of Mn, at most 0.030% of P, at most 0.030% of S, 0.85%-1.25% of Cr, 0.40%-0.70% of Ni, 0.30%-0.40% of Mo, 0.015%-0.050% of Al, at most 2.5*10<-4>% of H, 30*10<-4>%-80*10<-4>% of N, at most 15*10<-4>% of T.O, and the balance of Fe and inevitable impurities. The invention also provides a preparation method of the pinion steel. The nickel molybdenum alloy is added to improve the heat treatability of the material, thereby ensuring the mechanical properties of the material. The hardenability of the material is enhanced, and the material satisfies the performance requirements for large module pinions.

The invention relates to a method for producing a low-activation martensitic steel for a fusion reactor by melting. The method comprises: step one, a charging material is smelted in a vacuum induction furnace: (1) when a vacuum degree is between 0.1 and 10 Pa, argon gas is passed through the vacuum induction furnace till the vacuum degree is between 0.005 and 0.08MPa, and a smelting temperature is between 1450 and 1650 DEG C; (2) alloys are added in sequence: firstly, pure Fe is melted; Cr and W are added into the furnace; then Ta and V are added into the furnace, and finally C and Mn are added into the furnace; simultaneously, the level of an oxygen content in the pure Fe is observed; before Cr is added, a little of C is added into the furnace for carrying out deoxidation treatment; (3) on-line detection is carried out to the compositions of alloy elements; the alloy elements are added according to a detection result; and (4) after the compositions are qualified, a mixture is cast under the vacuum at a casting temperature of between 1450 and 1550 DEG C. Step two, according to the compositions and the inner quality level of a cast ingot which is obtained by vacuum induction and melting, whether the cast ingot is remelted and refined in a vacuum electroslag remelting furnace or a common electroslag remelting furnace with argon protection. Step three, a needed CLAM steel bar material is prepared by the production of forging, cogging and hot rolling. The method has the characteristics of simple smelting operation, stable process and low production cost; the compositions and impurities of the produced CLAM steel meet the design requirement; and the method has no aliquation of the compositions and tissues and high degree of purity and is suitable for the application of the fusion reactor.

The invention discloses a method for recovering fine mud cassiterite. The method comprises the following steps of dispersing a fine mud cassiterite mineral in an agitator by using sodium hexametaphosphate as a dispersing agent, grading the fine mud cassiterite mineral by using a high frequency fine screen, recovering the graded fine mud cassiterite mineral through gravity separation by using a fine mud cassiterite table concentrator to obtain fine mud rough concentrates in different particle sizes, and combining the fine mud rough concentrates in different particle sizes and performing floatation recovery on the fine mud cassiterite to obtain a cassiterite concentrate. By the method, the fine mud cassiterite can be effectively recovered, and the fine mud cassiterite concentrate of which the cassiterite grade is 45.87-46.21 percent and the recovery rate is 52.51-56.75 percent can be obtained under the condition that the fed mineral has the cassiterite grade of 0.37-0.45 percent.

The invention provides an agent for reverse flotation of iron ore and a combination use method. The agent is composed of pH regulator sodium hydroxide, desorption agents, inhibitor causticity corn starch, activator calcium oxide and fatty acid collectors and is characterized in that the desorption agents are composed, by weight, of 40-42 parts of water glass, 4-6 parts of carboxymethyl cellulose and 7-9 parts of polycarboxylate. When the desorption agents are used, all raw material components are dissolved respectively according to the weight proportion and mixed, water is added, and therefore a desorption agent solution with the mass concentration of 0.04-0.06% is prepared. The desorption agents are applied to a reverse flotation process including one-time rough separation, one-time fine separation and three-time scavenging and a stage agent addition manner is adopted, so that the selective inhibition function on iron minerals by inhibitors in an original reverse flotation process is obviously enhanced, selectivity of the collectors is obviously enhanced, the tailing grade is reduced, the metal recovery rate is improved, fine-grain metal losses are reduced, emission reduction, yield increasing and efficiency increasing are achieved, the resource utilization rate is improved, and a new approach is provided for improvement of the micro-fine-particle iron ore reverse flotation technical index.

The invention is an intelligent theft-robbery resistant and fatigue-driving resistant system for a vehicle, and relates to the collecting, analyzing, confirming and alarming of information of a driver and the vehicle and automatic braking control of the vehicle. The system comprises a vehicle speed sensor (VSS), an engine working senor, a vehicle-mounted information machine, a wireless (mobile) communication network, a data (information) processing center, an ignition circuit control switch of an engine, a vehicle automatic braking device, a 110 alarm center, an accident center of an insurance company and information of a vehicle owner. When the vehicle is in theft and robbery, the controlled state of the vehicle can be judged by comparing the head portrait of the driver with the driving license of the driver and confirming the owner of the vehicle; if the vehicle is not controlled, the data (information) processing center issues braking control instruction and alarming information that the vehicle is stolen, and the vehicle can realize remote control and prompt alarming by automatic braking and (or) disconnecting the ignition circuit of the engine. The system in the invention is applicable to various vehicles (ships).

The invention relates to a calcium treatment method for molten steel in steelmaking, which is the method for carrying out calcium treatment in two process steps in the steelmaking process route flow, and the steelmaking adopts the process route of pretreatment of molten iron plus smelting in a converter plus refining in an LF furnace plus RH refining plus continuous casting; the whole steelmaking process route adopts two times of calcium treatment; the first calcium treatment is to feed a calcium line into the molten steel to carry out the calcium treatment after finishing the LF treatment in the process step of refining in the LF furnace; and the second calcium treatment is to feed the calcium line into the molten steel to carry out the calcium treatment after finishing vacuum treatment in the process step of the RH refining. The application of the calcium treatment method for the molten steel in the steelmaking can respectively control the mass fractions of total oxygen and sulfur in a steel ball to be (5-20) multiplied by 106 and (2-30) multiplied by 106 respectively, most of inclusion in the steel ball is spherical, the equivalent diameter of the inclusion is (1-10) mu m, the qualified rate of the fault detection of a steel plate after rolling is larger than 99%, the B type inclusion grading is reduced as a whole, the proportion of the grade below grade 1 is 97%, and the control level of the inclusion is significantly improved.

The invention belongs to a process for treating oil field produced water and belongs to the field of oil field produced water treatment, in particular relates to the process for treating the oil field produced water. In the process, at least a regulating water tank, an air flotation device, a pipeline mixer, a nitrogen power reactor, a sedimentation tank and an ultrasonic filter are adopted and the oil field produced water is treated by adopting a mode of combining air flotation oil and suspended matter removal, nitrogen preparation and ultrasonic filtration. The process for treating the oil field produced water has good treatment effect, high oil removing efficiency, corrosion resistance and low cost and has good effect in the actual application.

The invention relates to a method for sorting and pre-enriching lean hematite by using X-ray radiation. The invention belongs to the technical field of mineral processing. The method comprises the steps that: copper-containing ores are crushed to a size below 150mm by using a crusher; the crushed material is sieved by using a sieving machine with a mesh size greater than or equal to 20mm; on-sieve material is delivered to an X-ray radiation sorting machine through a feeder; a sorting threshold is set in the control system of the X-ray radiation sorting machine according to the iron content in crude ore; and after the sorting of the X-ray radiation sorting machine, concentrate and tailings are obtained. The method provided by the invention is domestically initiative. Target component grade of processed ore is low, mechanical and automation degrees are high, ore-sorting cost is saved, the grade of selected material iron of a concentrator is greatly improved, and equipment utilization rate is substantially improved. Also, the process provided by the invention has the advantages of reasonable technology and stable running. With the method, industrialization of lean hematite pre-sorting can be easily realized, and concentrator economic and technical indicators and comprehensive benefits can be greatly improved.

The invention relates to the technical field of liquid crystal display, in particular to a structural improvement on a directly-down-type backlight source, and provides a light source with quantum dots. The light source comprises a substrate, a lamp bar and light mixing bodies arranged around the lamp bar are installed on the substrate, quantum dot stick blocks are arranged at the tops of the light mixing bodies, light emitted by the lamp bar is refracted by the quantum dot stick blocks to go out, and the light outgoing faces of the quantum dot stick blocks are curved surfaces. The invention further provides a manufacturing method of the quantum dot stick blocks and the novel directly-down-type backlight source assembled with the quantum dot stick blocks. According to the light source with the quantum dots, due to the fact that the light outgoing faces of the quantum dot stick blocks are the curved surfaces through the structural improvement on the quantum dot stick blocks, the light diffusion angle formed after the light emitted by the lamp bar passes through the quantum dot stick blocks is increased, and finally the light outgoing angle of the light source is increased.

The invention relates to an integrated approach to enriching nickel from nickel oxide laterite ore, comprising the following steps of: breaking the nickel oxide laterite ore into 100-320-mesh specification by a vertical mill; and feeding into a multistage cyclone to successively dry, calcine and reduce; meanwhile, injecting coal, coke or carbon black solid reductant into the multistage cyclone for prereduction roasting, wherein the amount of the added coal, coke or carbon black solid reductant accounts for 1-13wt% of the nickel oxide laterite ore; circulating and returning smoke discharged by prereduction roasting back to the vertical mill for drying materials; carrying out water quenching and wet ore grinding to the reduced materials; and carrying out magnetic separation under the magnetic field intensity of 3000-5000 Gaussians to obtain nickel ore concentrates of which the grade is 5-15wt%. The method can be used for processing different types of nickel oxide laterite ore and has the characteristics of strong adaptability to raw materials, flexible production technology and products, high nickel and cobalt recovery rate, low energy consumption, environment-protection performance and the like.