Stainless steel rigid sintered wire mesh microporous material, BJATL company after more than 40 years of service for energy, aviation and aerospace technology, in order to solve the problem of high-temperature gas turbine blades and liquid rocket engine injector panels ablation heat protection. A porous structure and functional material with international advanced level developed on the basis of the development and research of divergent cooling technology and materials. It uses common metal braided wire mesh as raw material, and is prepared by composite process such as reasonable combination of multi-layer metal wire mesh layers and vacuum high-temperature sintering, which can not only retain the ideal uniform pore distribution and excellent fluid permeability of common metal braided wire mesh, but also obtain the unique overall rigidity and high mechanical strength of metal structural materials. It is the comprehensive embodiment of high-tech material technology. Therefore, it has not only achieved great success in the application of divergent cooling in the liquid rocket engine injector panel in the aerospace field, but also has been widely used in the extreme high temperature structure heat protection, resource recycling, separation and filtration, air distribution control, catalytic reaction, enhanced heat transfer, noise reduction and flame retardant and explosion prevention in modern industry. It has greatly promoted and promoted the continuous development and progress of the technological level in aviation, aerospace, petroleum, chemical industry, metallurgy, environmental protection, pharmaceutical, energy and machinery and other related industrial fields.

Due to the high technical content and wide application range, the development of high-performance sintered metal porous materials and their composite preparation technology on an industrial scale has been widely concerned by countries around the world, and has gradually been widely used in industry after the 1990s. At present, the industrial application of rigid sintered metal porous materials is mainly concentrated in the following four aspects:

1, for the extreme high temperature environment of heat protection structural material - wire mesh sintering porous divergent cooling material

Divergent cooling of porous materials is a new and efficient cooling technology to ensure that materials are not destroyed by ablation in the current extreme high temperature heat flow environment. It forms a continuous and stable cooling gas boundary layer with certain strength and thickness on the surface of the material through the forced penetration of the cooling gas inside the porous material. On the one hand, the boundary layer can block most of the high temperature heat flow into the surface of the porous material; on the other hand, the permeability conduction of the cooling gas on the large specific surface area inside the porous material also takes away part of the heat flow. Thus, the material is protected to work stably and reliably under extreme high temperature environments that are difficult for general solid materials to withstand. At the same time, the existence of the gas boundary layer can also play a certain role in protecting the oxidation, wear and corrosion of the material surface. Rigid sintered metal wire mesh porous material is an ideal divergent cooling material because of its uniform pore distribution, easy precise control of gas permeability, and high strength and stiffness required by structural materials. This material has now been successfully used in space liquid rocket engine hydrogen and oxygen injector panel, better solve the panel in the high temperature environment of 3500℃ ablation and thermal protection problems, for the further application of the material in other industrial fields laid the technical foundation.

2, fluid distribution control and fluidized bed orifice material

The control of fluid distribution, transmission and fluidization operation of powder materials are widely used in industrial processes, especially fluidization technology is an important means of mass transfer, heat transfer and chemical reaction in chemical processes. Among them, the control of the operating gas or liquid distribution state must use a breathable orifice material. Due to the characteristics of uniform pore distribution, stable flow and resistance control, high strength, large rigidity, easy combination installation and maintenance, good mass transfer, heat transfer and fluidization effect, high efficiency, high temperature resistance, corrosion resistance, wide range of applicable environment, rigid sintered metal mesh porous material as a fluid distribution control and fluidization bed orifice material. The operation flexibility is large, the process adjustment is convenient, the material is not easy to leak, can eliminate breakdown short circuit and blocking and other faults, long service life, is a new and efficient innovative technology.

At present, the rigid sintered metal mesh plate material has been widely used in the fluidization and concentrated phase conveying system of pulverized coal injection in blast furnaces, as well as in the industrial fields of drying, pulverizing and mixing.

3, high precision, high reliability of microporous filtration materials

The rigid sintered metal wire mesh porous material is used for the purification and filtration of gas and liquid, which has the characteristics of high filtration accuracy, large flow capacity, small resistance loss, high pressure strength, uniform and stable pore. Its typical composition structure is 3 ~ 6 layers, which are mainly divided into three parts: protective layer, filter layer and support layer. The filter material not only has the higher filtration accuracy of the filter layer, but also has the higher strength and stiffness of the supporting layer. In particular, the filter layer is designed as the outer layer of the combined structure, the filter mechanism is mainly based on the surface filter, and the mesh hole is smooth, the thickness of the blocking filter layer is very small, so that it has excellent backwashing and regeneration performance, can be used repeatedly for a long time, especially suitable for continuous and automated operation process, which is not comparable to any other filter material. The filter material is easy to form and process, and can be used in many industrial fields such as petroleum, chemical, textile, food, pharmaceutical, environmental protection, hydraulic machinery and electric power to purify and filter its fluid materials and working media. Such as high temperature gas purification, sewage filtration, catalyst separation, hydraulic oil filtration, liquid medicine and food and beverage fine filtration, dyes, ink, paraffin and sulfur and other chemical products industrial filtration and so on.

4, high reliability flame retardant and explosion-proof material

In many industrial fields involving combustion processes and combustible gases, with the development of combustion technology and the improvement of power levels, the requirements for control and control element reliability related to system safety are also increasing. The new type of explosion-proof flame-retardant material has the advantages of uniform pore distribution, high permeability and high strength through the design of reasonable metal mesh laminated structure and sintering at high temperature under vacuum (or protective atmosphere). The new explosion-proof flame-retardant element is used in the safe flame-proof breathing device, and the alarm reaction time of the flame-proof flame-proof device can be effectively shortened due to the improvement of gas permeability, so the safety and reliability performance and service life of the device can be greatly improved.

At present, a variety of series of sintered metal wire mesh microporous explosion-proof flame-retardant components have passed the inspection of Tianjin explosion-proof testing Center, and obtained the inspection certificate, which can meet the explosion-proof needs of various mixed gases. It can be predicted that the application and promotion of new sintered metal mesh microporous explosion-proof flame-retardant components will bring huge economic and social benefits to related industrial fields.

At present, our company's products in the field of sintered metal mesh porous materials are mainly divided into three levels:

1, sintered metal mesh microporous material filter elements, mainly used to replace the existing filter equipment in the filter paper, filter cloth, ceramic and wound metal wire and other traditional filter elements, as well as some imported equipment in the sintered metal filter elements.

2, sintered metal mesh microporous material filter element as the main body of the monomer filtration equipment and its application technology, mainly used for the renewal of existing filtration equipment.

3, with sintered metal mesh microporous material filter elements as the core, the development of continuous operation and automated operation of complete sets of filter systems, as well as system integration application technology.

Mature technologies and products have been developed and applied in the following aspects:

• Production and preparation of high-performance sintered porous metal filter elements, filter plates and other high-efficiency filter elements;

• Complete equipment and application technology for automatic backwashing continuous liquid/solid separation and filtration system;

• Complete technology of ultra-high speed pulsed air automatic backblowing continuous gas/solid purification and dust removal system;

• High strength and high efficiency fluidization flow distribution control technology and preparation of sintered metal porous plates;

• Preparation of fluidized metal microplates for oxygen-enriched coal injection in blast furnace;

• Heavy oil catalytic cracking external oil slurry purification and filtration technology and complete equipment;

• Separation and recovery technology and equipment of precious metal catalyst;

• Diesel/residual oil/wax oil hydrofining raw oil purification and filtration technology and complete equipment;

• Purification and filtration technology of chemical materials such as liquid sulfur and liquid amine.

• Product technologies under development include the following:

• High temperature dust removal and desulfurization technology of gas and gas;

• Industrial water purification and recycling treatment technology;

• Dry coal washing fluidized gas distribution plate preparation and uniformity control technology;

• Oil sand control and reinjection water purification treatment technology;