6results about How to "Stable process flow" patented technology

The invention belongs to the technical field of composite material preparation, and particularly relates to a tungsten infiltrated copper composite material and a preparation method thereof. According to the invention, through a multi-scale through pore network formed by'prefabricated material construction ', molten copper liquid can be rapidly filled along a large pore channel and fully permeates into the tail end of a small pore, so that the defect of'black core' generated by closed pores is thoroughly avoided. According to the prepared composite material, the tungsten phase and the copper phase respectively form a stable and communicated three-dimensional network, so that the unification of high conductivity (greater than or equal to 60% IACS), high strength and toughness (hardness greater than or equal to 100 HB) and excellent arc ablation resistance is fundamentally and synergistically realized, and the long-standing limitation of'impossible performance triangle 'is effectively broken through. And the process is high in integration level, green and remarkable in strengthening effect, and process simplification, environmental protection strengthening and performance improvement are achieved at one stroke. The advantages of raw materials and process cost are outstanding, the industrialization prospect is wide, and the relationship among high performance, designability and mass productivity is perfectly balanced.

The utility model relates to the technical field of urea granulation, in particular to a fluidized bed granulation device for urea granule production, which comprises a fluidized bed body, one side of the fluidized bed body is fixedly connected with a first blanking plate, and one side of the fluidized bed body is provided with a base. A first vibration frame is installed at the top of the base, a first screening net is fixedly connected into the first vibration frame, a second screening net is installed in the vibration frame, a rotary drum granulator is arranged on one side of the base, a support is arranged on one side of the rotary drum granulator, a second vibration frame is slidably connected to the top of the support, and a third screening net is fixedly connected into the second vibration frame. A first driving assembly is installed at the top of the base, a second driving assembly is installed at the top of the support, and the fluidized bed granulation device for urea particle production has the advantages that the product particle size qualification rate is increased, the technological process is stabilized, and efficient screening and grading are achieved.

This invention discloses a method for preparing and applying environmentally functional materials rich in persistent free radicals. The preparation method includes: mechanically crushing and sieving agricultural waste, washing it with deionized water, and drying it to constant weight; mixing the obtained agricultural waste powder with alkali at a specific mass ratio, adding deionized water, stirring uniformly at room temperature to promote a complete reaction, and then transferring the mixture to a crucible for drying; and pyrolyzing the precursor in a tube furnace under a nitrogen atmosphere to finally obtain biochar material with a high content of persistent free radicals. This invention utilizes a three-step method of "raw material pretreatment - alkali modification - controlled-temperature pyrolysis" to efficiently transform widely available and low-cost agricultural waste into structurally stable and high-performance environmentally functional materials. The process is simple, low-cost, and environmentally friendly, showing good practicality and promising prospects for widespread application.

The invention belongs to the technical field of laser cladding, provides a graphite rod ceramic coating for epitaxial support of a semiconductor wafer and a laser cladding preparation method of the graphite rod ceramic coating, and is used for solving the problems of low bonding strength, low density and the like of a ceramic layer on the surface of an existing graphite substrate. The graphite rod ceramic coating for epitaxial supporting of the semiconductor wafer comprises a graphite substrate, and a transition layer, a ceramic middle layer and a ceramic functional surface layer are sequentially arranged on the outer side of the graphite substrate. According to the method, the bonding strength between the ceramic coating and the graphite rod substrate can be improved, meanwhile, the problems of pores, cracks and the like of the ceramic coating are effectively solved, the density of the ceramic coating is finally improved, the high insulation, high wear resistance and high cleanliness of the ceramic coating are improved, and the method is suitable for high-end semiconductor manufacturing.

The utility model belongs to the technical field of continuous casting, and particularly discloses a tundish side slag discharging system which comprises a tundish body and a supporting table, one side of the tundish body is communicated with a conical slag disc, the conical slag disc is communicated with a slag discharging sliding nozzle, the slag discharging sliding nozzle is located on one side of the conical slag disc, and a slag overflowing hopper is arranged on the supporting table. The slag overflowing hopper is located below the slag discharging sliding nozzle, one side of the slag overflowing hopper communicates with a slag overflowing hopper sliding nozzle, a flow guide groove is fixedly connected to one side of the supporting table and located below the slag overflowing hopper sliding nozzle, supporting rods are arranged on the two sides of the flow guide groove, a first limiting rod is arranged between the two supporting rods, and connecting rods are fixedly connected to the bottoms of the two supporting rods. The two connecting rods are each provided with a second limiting rod, and the first limiting rods are located above the second limiting rods. In the continuous production process, the capacity of the slag overflowing hopper is monitored in real time, and the slag overflowing hopper is replaced in time, so that the overall production efficiency and the product quality are improved, the stability of the continuous casting process is ensured, and unplanned shutdown caused by the slag discharging problem is reduced.

The invention relates to the technical field of flotation agents, in particular to a steric hindrance group mixed flotation agent and application of the steric hindrance group mixed flotation agent to flotation separation of quartz and feldspar. According to the technical scheme, the steric hindrance group mixed flotation agent is composed of dodecyl dimethyl benzyl ammonium bromide (BDAB) serving as a collecting agent and sodium dodecyl benzene sulfonate (SDBS) serving as an inhibitor, and the mass ratio of the sodium dodecyl benzene sulfonate to the dodecyl dimethyl benzyl ammonium bromide is 1: 1.1-1: 1.5. According to the neutral flotation method, efficient separation of quartz and feldspar can be achieved under the normal-temperature condition, and environmental pollution and equipment corrosion are avoided; the adopted composite flotation agent is low in toxicity, good in water solubility and small in dosage, the separation selectivity is remarkably improved through sequential addition and steric hindrance synergistic effect, high-grade quartz and feldspar concentrate can be obtained through one-time flotation, the technological process is simple and stable, implementation is easy, and the method is suitable for resource utilization of silicate tailings.