49results about How to "Guarantee the breeding effect" patented technology

The invention discloses high-strength nodular cast iron QT900-6 which consists of the following elements in percentage by weight: 3.2-3.7% of C, 2.4-2.8% of Si, less than or equal to 0.2% of Mn, less than or equal to 0.03% of P, 0.005-0.02% of S, 0.8-1.4% of Cu and the balance of Fe and unavoidable trace elements. The high-strength nodular cast iron QT900-6 has high compressive strength, high yield strength and excellent mechanical property.

A spheroidizing treater for producing spheroidal graphite cast iron is carried out by adjusting bearing rod head and dam seam and controlling iron-water and nodulizer contact. It adopts waste-heat one-step method and controls spheroidizing reactive time and strength; the spheroidizing agent consists of Mg<=20%, RE<=3% and Si<=65%. It's simple, cheap and can be used for large-scale continuous production.

The invention relates to the technical field of iron casting melting, in particular to a melting technology for a thin-wall ferrite nodular iron casting. The melting technological process comprises the following steps of feeding melting, ingredient fine adjustment, molten iron pretreatment, molten iron refining, spheroidizing treatment and inoculation treatment. According to the technology, the feeding sequence is controlled, so that it is ensured that crystal type cores in cast iron are not be severely damaged by fire, and sufficient crystal type cores are provided for spheroidizing of graphite in molten iron in the later period; the method of adding SiC at the same time is adopted in the pretreatment process, the molten iron is made to sufficiently absorb SiC through electromagnetic stirring force of electric furnace melting, and the pretreatment effect is ensured; the thrice inoculation treatment technology is adopted in the inoculation treatment process, and therefore the inoculation effect on the molten iron is sufficiently ensured; and casting is finished within a short time after molten iron spheroidizing treatment, and the metallographic structure of the casting is ensured.

The present invention provides a method for culturing fish with net cage. Firstly the whole framework of net cage layout is set according to the condition of inland river water and reservoir area water. A frame is installed on the framework. Then a large net cage is installed on the framework. Filter economic fish are cultivated in the large net cage. Finally intensive culture net cages are installed in the large net cage. Bait throwing type fishes are cultivated in the intensive culture net cages. The method for culturing fish with net cage according to the invention adopts the tridimensional inter-culturing mode of different water layers with the fishes with different food habits according to the ecological principle. The bait throwing type fishes are cultivated at the upper layer of the filter economic fish which can eat the excrement and residual bait of bait throwing type fishes. The effects of pollutant discharge amount reduction and environment protection at the state that the cultivation effect of prior fish is guaranteed. The method of the invention also has the advantages of easiness, easy learning, strong adaptability and easy generalization.

The invention provides a temperature control device in seawater breeding pond water reflow treatment. The temperature control device comprises a reflow water tank, a breeding pond and a heat exchange pump; the temperature control device is characterized in that a heat storage water tank and a plurality of heat exchangers are additionally arranged; one water outlet of the heat exchange water tank is communicated with a solar water heater through a water pump; the water outlet of the solar water heater is communicated with a water inlet of the heat storage water tank; another water outlet of the heat storage water tank is communicated with a heat source main pipe through a water source heat pump; the heat source main pipe is communicated with a plurality of heat source branched solenoid valve pipelines; each reflow branch pipe is communicated with the liquid inlet of the corresponding heat exchanger; the liquid discharge port of each heat exchanger is communicated with a reflow port of the breeding pond; each heat source branched solenoid valve is communicated with the water inlet of the corresponding heat exchanger through a heat source branch pipe; the water outlet of each heat exchanger is communicated with a reflow main pipe through a reflow branch pipe; and the reflow main pipe is communicated with the reflow port of the heat storage water tank. The temperature control device provided by the invention has the advantages that no seawater desalination phenomenon exists in reflow water indirect heat exchanging, and the seawater breeding effect is ensured, and moreover, the solar energy and the water source heat pump are complementary.

The invention relates to the field of as-cast high-strength high-elongation synthetic nodular cast iron. The invention relates to as-cast high-strength high-elongation synthetic nodular cast iron anda preparation method thereof. The nodular cast iron is characterized in that under the as-cast condition, the nodular cast iron meets performance requirements that the tensile strength Rm is larger than or equal to 700 MPa, and the percentage elongation A after fracture is larger than or equal to 10%; the matrix is a pearlite-ferrite mixed matrix; the content of pearlite is 55%-75%, a spheroidizing grade is 1-2, a graphite size grade is 6-7, the nodular cast iron is composed of elements, by mass, 3.5%-3.7% of C, 2.9-3.3% of Si, less than or equal to 0.2% of Mn, less than or equal to 0.035% ofP, less than or equal to 0.02% of S, 0.5%-0.7% of Cu, 0.55%-0.75% of Ni, 0.030%-0.065% of Mg and the balance of Fe and trace elements. The method has the beneficial effects that scrap steel and raw material pure iron are adopted for recarburization, base iron is smelted in a medium-frequency induction furnace, then pretreatment, spheroidizing treatment and inoculation treatment are conducted, final pouring is conducted, and QT700-10 is achieved under the as-cast condition.

The invention relates to a breeding method of masu salmons, relating to a breeding method of fishes. The method solves the technical problem that existing introduced masu salmons are featured with genetic drift, weak resistance, germplasm differentiation and quality degradation caused by small group and inbreeding. The method comprises the following steps: 1, establishing an F1-generation family; 2, cultivating the F1-generation family; 3, constructing a self-reproducing system in an F2-generation family and an F2-generation group; 4, breeding the F2-generation group by a three-stage elimination method; 5, constructing an F3-generation group and breeding by the three-stage elimination method; 6, constructing an F4-generation group and breeding by the three-stage elimination method; 7, constructing an F5-generation group and breeding by the three-stage elimination method; and 8, constructing an F6-generation group and breeding by the three-stage elimination method to finish breeding the masu salmons. The masu salmons obtained by using the method are featured with full body color, high growth speed and high postnatal survival rate.

The invention relates to the technical field of marine diesel engines, and particularly relates to a smelting method for the cylinder cover of a marine diesel engine. The smelting method comprises the following steps of: proportioning, smelting original molten iron, performing spheroidization treatment, performing primary inoculation treatment, performing secondary inoculation treatment, and pouring. During smelting, a certain amount (about 0.25%) of Mn is added, so as to ensure that the content of pearlites meets technical requirements while ensuring the strength of castings; 1.3-1.8% of T-1 type spheroidizing agent is used for performing inoculation twice, and stream inoculation is performed during the secondary inoculation, so that the spheroidization rate can be increased, the spheroidization degeneration of the castings can be prevented, and the inoculation effect can be ensured; and moreover, the T-1 type spheroidizing agent is a heavy-rare-earth ferrite type spheroidizing agent capable of effectively stabilizing ferrite, ensuring the low content of rare earth, and greatly reducing the shrinkage trend of the castings.

The invention provides a coastal saline-alkali soil ecological improvement system. The system comprises an ecological regulation pond, a culture pond, a platform field, an alkali discharge ditch and a shallow groundwater extraction system, the ecological regulation pond and the alkali discharge ditch are connected with the alkali discharge ditch and a river through ditches, the ecological regulation pond performs rainy season fresh water accumulation and individual rainy year water draining, and the culture pond performs underground water or fresh water supplementing and aquaculture. The platform field is paved with different kinds of straw according to different distances with the pond, the shallow groundwater extraction system provides power by means of blending of wind energy and solar energy to extract shallow groundwater continuously day and night. The invention further provides a matched high-yield cotton planting method. Accordingly, adversity stress of saline-alkali, drought and water logging of coastal saline-alkali soil is significantly changed, and normal growth and development of cotton are promoted; meanwhile, the pest and disease damage is significantly lowered, management is conducted more conveniently, the cotton yield is significantly increased, the cotton quality is significantly improved, and the cotton planting earnings of farmers are directly increased.

The invention provides a kind of as-cast high-strength and ductility synthetic nodular cast iron QT800-5 and a preparation method thereof. The as-cast high-strength and ductility synthetic nodular cast iron QT800-5 comprises, by mass, 3.70-3.95% of C, 3.3-3.5% of Si, less than or equal to 0.2% of Mn, less than or equal to 0.035% of P, less than or equal to 0.02% of S, 0.5-0.7% of Cu, 0.55-0.75% ofNi, 0.035-0.65% of Mg residues, and the balance Fe and microelements. The preparation method of the as-cast high-strength and ductility synthetic nodular cast iron QT800-5 comprises the following steps of mixing and smelting; alloying; pretreatment and spheroidizing; and inoculation treatment and pouring. The preparation method comprises the steps of smelting base iron melt in a medium-frequencyinduction furnace through steel scrap recarburization; adding silicon iron and cathode copper to conduct alloying; bringing in alloying elements nickel through a spheroidizing agent; conducting pretreatment, spheroidizing and inoculation treatment; and finally conducting pouring. The as-cast high-strength and ductility synthetic nodular cast iron QT800-5 prepared through the method has high strength, good ductility and toughness and excellent comprehensive performance.

The invention provides a breeding task management method, a breeding task management device, breeding task management equipment and a breeding task management system. The breeding task management method comprises: acquring the real-time task performance of a bred object; Creating a breeding task corresponding to the real-time task performance; And pushing the breeding task. According to the breeding task management method, the breeding task management device, the breeding task management equipment and the breeding task management system, the corresponding breeding task is created according tothe real-time task performance of the bred object, real-time monitoring is achieved, a production manager can be reminded to deal with sudden and accidental breeding tasks in time, and therefore the breeding effect is guaranteed.

The embodiments of the invention relate to the field of feeding equipment and disclose a feeder, a feeding control device of the feeder and a feeding control method of the feeder. According to the feeding control device of the feeder, disclosed by the invention, the feeder comprises a containing bucket and a feeding unit. The feeding control device comprises a main control module, a range sensor,a network module and a power supply module, wherein the main control module is electrically connected with the feeding unit; the range sensor is electrically connected with the main control module, isarranged above the containing bucket and is used for detecting a spatial height between the surface of a feed in the containing bucket and the range sensor; the network module is electrically connected with the main control module; and the power supply module is electrically connected with the main control module. When the spatial height is greater than a preset height, a to-be-fed signal is sentto a remote device through the network module by the main control module; and when variance of the spatial height is smaller than preset variance in a preset duration, a to-be-serviced signal is sentto the remote device through the network module. Compared with the prior art, feed feeding conditions and the amount of the feed remaining in the containing bucket can be monitored in real time.

The invention relates to the field of metal materials, and discloses a nucleating agent for improving pearlite. The nucleating agent comprises the chemical components of, by weight, 0.49-0.51 part of silicon carbide, 0.025-0.035 part of tin, 0.025-0.035 part of antimony, 0.4-0.5 part of silicon-manganese-chrome special nucleating agent, and 0.07-0.09 part of strontium-silicon. The invention further discloses a method for improving the pearlite by the nucleating agent. The method specifically comprises the following steps that first, the silicon carbide accounting for 0.5+/-0.01% of liquid iron is added into the surface of the liquid iron, and stirring is conducted for 3+/-1 min, wherein the temperature of the liquid iron is 1450+/-50 DEG C; second, 0.03+/-0.005% of the tin, 0.03+/-0.005% of the antimony and 0.45+/-0.05% of the silicon-manganese-chrome special nucleating agent are added into a liquid iron transfer ladle, and the elements are transferred into a pouring ladle after being poured into the iron liquid; and third, 0.8+/-0.01% of strontium and silicon are adopted for metal-stream inoculation in the whole process of pouring. According to the nucleating agent and the method, it is ensured that the pearlite at a thin wall is larger than 95%, and the physical property of a cylinder can be improved effectively.

The invention discloses a high-strength gray iron casting smelting method. Gray iron casting smelting is performed with scrap steel, pig iron and foundary returns as raw materials. The smelting method includes the specific steps that ferromanganese and the 10% pig iron are added into a medium-frequency induction electric furnace; then, carbon agents and the scrap steel are added at the same time; smelting is performed till the size of molten iron in the induction electric furnace is reduced by 3/4 through smelting; smelting is performed while silicon carbide is added, so that base iron is formed; the base iron is heated so that temperature can be raised; the induction electric furnace is adjusted to be in a heat-preservation state, and standing lasts for 5-10 minutes; and silicon and zirconium inoculant and final molten iron are punched into iron discharging ladles, and then the silicon and zirconium inoculant and the final molten iron are punched into a cast cavity so that casting can be performed. The method replaces a traditional method that alloyed elements such as copper or tin need to be added, manufacturing cost is reduced, and the foundary returns can be conveniently managed. The method that the silicon carbide and furnace burden are smelted at the same time is adopted for pre-processing the molten iron, and the pre-processing effect is guaranteed. The efficient silicon and zirconium inoculant is adopted so that the inoculation effect is guaranteed, and more than 80% of A-type graphite is obtained from the casting body metallographic phase.

According to the preparation method of the large-tonnage nodular iron casting, the number of balls is large, spheroidization is uniform, spheroidal graphite distortion is small, and the deformation amount of the casting in a casting state is small. The preparation method creatively adopts a ladle-to-ladle spheroidization to adjust the temperature so that the temperature can be controlled, and a four-time composite inoculation block technology is adopted; the number of large-tonnage ductile iron graphite nodules in a cast state is remarkably increased, and finally it can be guaranteed that the number of cast nodules is large, spheroidizing is uniform, deformity is avoided, and the mechanical property is guaranteed; meanwhile, the compacted blocky inoculant is adopted to inoculate the molten iron before and after spheroidizing, slow-release inoculation is achieved through multiple times of slow release, the molten iron fully exists in a temperature and concentration fluctuation area, and therefore the graphite nodules are numerous, round and uniform; according to the method, the spheroidal graphite can be stably obtained, the distortion is small, and the high elastic modulus can be obtained, so that the deformation of a casting in an as-cast state is reduced.

The invention belongs to the technical field of aquaculture equipment, and particularly relates to a caisson device for cultivating filter feeding shellfishes. The caisson device comprises a caisson main body, an opening and closing cover is mounted at the front end of the caisson main body, side holes are formed in the inner side of the caisson main body, an inflating pipe is arranged at the inner side of the caisson main body, and an air outlet is formed in the upper end of the inflating pipe. Attachment plates are arranged at the inner side of the caisson main body, positioning holes are formed in the inner sides of the attachment plates, breeding grooves are formed in the inner sides of the attachment plates, and exchange holes are formed in the inner side of the caisson main body. Through the arrangement of the side holes, water exchange between the interior of the caisson main body and the external environment is achieved, so that circulation of the water in the caisson main bodyis ensured; through the arrangement of the exchange holes, water exchange with the external environment can be achieved, dirt produced in the growth and development process of the filter feeding shellfishes can be discharged in time, and therefore the culture effect of the filter feeding shellfishes is guaranteed.