What are the performance characteristics of wear resistant elbows?

With the continuous development of science and technology, materials are also constantly innovating, and materials such as cast stone, cast steel, alloy and other materials have appeared one after another. Among them, the alumina ceramic lined with pipes has become one of the most widely used wear-resistant materials due to its high wear resistance, high hardness, oxidation resistance, good corrosion resistance and extremely high and low temperature strength resistance, accounting for about 80% of the world's special ceramics market share (wear-resistant materials).

The folding abrasion resistance is good, and the ceramic composite pipe is corundum ceramic (A-Al2O3) due to the inner wear-resistant ceramic elbow lining, and the Mohs hardness can reach more than HRC85. Therefore, it has high wear resistance to the grinding media conveyed by metallurgy, electric power, mining, coal and other industries. Confirmed by industrial operation:

Its wear resistance is ten times or even dozens of times that of quenched steel. Folding running resistance, SHS ceramic composite pipe due to the smooth inner surface and never corroded, does not have a convex spiral line on the inner surface of seamless steel pipe. After the test of the internal surface roughness and clear water resistance characteristics of the relevant testing unit, the smoothness of the inner surface is better than that of any metal pipe, and the clear resistance coefficient is slightly lower than that of seamless pipes.

Therefore, the pipe has the characteristics of low running resistance, which can reduce operating costs. Folded corrosion-resistant and anti-scaling, the ceramic layer of the steel is (A-Al2O3), which is neutral. Therefore, it has the characteristics of acid and alkali resistance and seawater corrosion resistance, and at the same time has the characteristics of anti-scaling.

Folding temperature resistance, due to the corundum ceramic (A-Al2O3), is a single stable crystalline structure. Therefore, the composite tube can operate normally for a long time in the temperature range of -50--700. The linear expansion coefficient of the material is 6-8 10-6 0c, which is about 1 2 of the steel pipe.

The material has good thermal stability.

The wear-resistant elbow ceramic composite pipe is light in weight and suitable. 50% lighter weight than cast stone pipes with the same inner diameter; It is 20-30% lighter than wear-resistant alloy pipes, and has good wear resistance and corrosion resistance, because of its long service life, so as to reduce the cost of supporting hangers, handling costs, installation costs and operating costs. According to the comparison between the project budget and the actual project of the relevant design institute and the construction unit, the project cost of the pipe is equivalent to that of cast stone, and the project cost is reduced by about 20% compared with the wear-resistant alloy pipe.

It is easy to install and construct because the pipe is light in weight and has good welding performance. Therefore, welding, flange, coupling and other methods can be used to facilitate construction and installation, which also causes the installation cost to be reduced.

The ceramic lined elbow r represents the bending radius of the elbow, the larger the r, the longer the elbow, and the larger the bend. The smaller the radius of the ceramic wear-resistant elbow, the smaller the bend, and the impact force is concentrated. The bending radius of the ceramic lining elbow is generally designed to be 5d-7d, which is beneficial to the quality of the wear-resistant elbow, with a longer service life and good wear-resistant effect.

The wear-resistant elbow is light in weight and easy to install.

The wear-resistant elbow is lined with wear-resistant materials with high hardness and good wear resistance and corrosion resistance.

The inner wall of the wear-resistant elbow is smooth and does not block the material.

Spherical elbow is widely used in the ash conveying industry, and its performance is more wear-resistant and does not block ash. The requirements for the production of spherical wear-resistant elbows are as follows:

1. The spherical elbow material is required to be high-quality carbon steel or; The material of the outlet powder pipe elbow and ball elbow is required to be seamless steel pipe or steel ball. All spare parts are required to be lined with corundum ceramic, and PN16 flanges are required to be left at both ends of the spare parts, which is convenient for the installation of the lined ceramics with dense and smooth surface, and no grooves, bubbles, wear-resistant layers and steel pipes are allowed. The inner lining wear-resistant ceramic layer is uniform, the wear resistance is good, the average thickness is not less than 4mm, the Mohs hardness is above, and the metal wall thickness is 8mm.

Uses: In addition to being used in coal-fired power plants in ash removal, slag discharge pipes, powder feeding, powder return pipes, and desulfurization pipelines, wear-resistant elbows are also widely used in the following industries:

Mining: coal water slurry, coal slime, mine filler, pulverized coal in the coal industry;

Metallurgy: blast furnace coal injection, slag transportation and other pipelines for ironmaking in iron and steel plants; CAO zinc sand transportation pipeline, steelmaking conveying ferroalloy, furnace refining and other preferred wear-resistant elbows.

Cement plant: raw slurry transportation, pulverized coal transportation, elevator blanking, finished cement pneumatic conveying, loading and unloading of finished cement in rotary kiln wet production line, concrete conveying wear-resistant elbow.

Chemical plants: pulverized coal transportation pipelines, silicon powder and other raw materials transportation wear-resistant elbows metal mines: concentrate and tailings transportation wear-resistant elbows;

Metal mines: conveying wear-resistant elbows for concentrates and tailings;

Shape wear-resistant 10,000-spherical wear-resistant elbow wear-resistant, corrosion-resistant in power plants, steel mills, cement plants.

Wear-resistant elbow purchasers do not understand the specifications and models of wear-resistant elbows, as a wear-resistant elbow manufacturer Yuchang has a detailed explanation of wear-resistant elbow models, and you can learn more about the basic knowledge of wear-resistant elbows.

1. Wear-resistant elbow arrangement and procurement need to provide wear-resistant elbow material, specification and model. Wear-resistant elbow materials include corundum ceramic, high-chromium wear-resistant steel, high-temperature tortoiseshell mesh, etc. Wear-resistant elbows need to be designed according to the actual working conditions.

2. Specifically explain the wear-resistant elbow model, which includes angle, bending radius, Qikai steel pipe thickness, and ceramic thickness. For example, 90° wear-resistant elbow DN150*8 R=1000 ceramic thickness 4mm 26 pieces. The angle of the elbow is 90 degrees, and there are other 60 degrees, 45 degrees and 30 degrees, the diameter of the elbow is 150mm, the thickness is 8mm, R represents the bending radius of the elbow 1000mm, and the thickness of the ceramic lining is quietly dismantled 4mm.

This kind of ceramic elbow is designed with an outer diameter of 180mm, and cannot be designed with a diameter of 159mm, which cannot ensure the diameter.

3. Table of commonly used models of wear-resistant elbows.

Wear-resistant elbow is a kind of steel, and people who don't know how to do it will not pay attention to this material, but the ceramic market and power plants are quite concerned about it, because the wear-resistant elbow is inseparable from many factories. With the development and progress of the industry, the continuous innovation of materials, wear-resistant elbow is a new product under innovative technology, today, wear-resistant elbow has become the most extensive wear-resistant material, especially wear-resistant elbow has many excellent characteristics, so that it is the leader in wear-resistant materials. It is widely used not only in Japan but also in foreign factories.

Let's take a look at what its features are.

Wear-resistant elbow shed features:

1. Good wear resistance. The hardness HRC of the super-hard wear-resistant alloy is greater than or equal to 46, and it has good wear resistance and thermal stability.

2. Excellent impact resistance, metal bonding performance, and thermal shock resistance. In particular, the KMTBCR28 bimetallic composite wear-resistant elbow has a completely metallurgical combination of the joint surface of the two metals, which is safe and reliable to use. The thermal expansion coefficient of the two is comparable, and there will be no expansion, contraction and cracking.

The outer wall of the elbow is made of steel pipe, and the inner lining is made of ultra-hard wear-resistant alloy, which not only has the wear-resistant and corrosion-resistant characteristics of high-alloy products, but also has high mechanical properties and high impact resistance.

3. Good heat resistance and corrosion resistance The matrix of cemented carbide material has strong heat resistance and corrosion resistance, and can show good corrosion resistance and wear resistance in high temperature or corrosive environment. Under the action of wet, corrosive medium and particle erosion, it is more suitable to use ultra-hard wear-resistant alloy in cast state; However, under dry conditions where abrasive wear is the main failure mode, an ultra-hard wear-resistant chain metal material with martensitic matrix obtained by heat treatment is selected.

4. The compound cost is low, and it is high-quality. The wear-resistant pipe is manufactured by the international advanced lost foam casting process, with high yield, good product compactness, uniform thickness and stable quality.

5. It is extremely convenient to transport, install and use. Bimetallic composite wear-resistant pipes can be connected by flanges, quick connectors, direct welding, etc. And because of the high impact resistance of the composite pipe, when local blockage occurs in the maintenance of the pipeline system, it can be knocked and hammered at will, and it can also be cut, unloaded, welded, installed, and repaired at will.

In the industry, all kinds of wear-resistant elbows are deeply loved by the boss by virtue of their characteristics, and the cost is not high, which makes it the best choice for wear-resistant materials. Similar industrial materials, wear-resistant elbows are far ahead, and are widely used. Industrial materials are often labeled as polluting, but the biggest advantage of wear-resistant elbows as a new type of material is that they do not pollute the environment.

The wear-resistant elbow has a long service life, which also saves a lot of costs for the factory, and it is safe to use. Therefore, both bosses and workers use wear-resistant materials to favor wear-resistant elbows.

You can get it for free

Rongfeng ceramics in Pingxiang City, Jiangxi Province.

The ceramic wear-resistant elbow is manufactured by high-tech production process - self-creeping combustion high-temperature clutch synthesis method. The pipe is composed of corundum ceramic, transition layer and steel pipe from the inside to the outside, and the ceramic layer is formed at a high temperature of more than 2200 to form dense corundum porcelain (Al2O3), which forms a firm bond with the steel pipe through the transition layer.

The composite pipe gives full play to the high strength, good toughness, impact resistance, good welding performance of the steel pipe and the high hardness, high wear resistance, corrosion resistance and good heat resistance of corundum porcelain, and overcomes the characteristics of low hardness, poor wear resistance and poor ceramic toughness of the steel pipe. Therefore, the composite pipe has good wear resistance, heat resistance, corrosion resistance, mechanical impact and thermal shock resistance, good weldability and other comprehensive properties, and is an ideal wear-resistant and corrosion-resistant pipe collapse rough road for conveying granular materials, grinding, corrosive media, etc.

Lined with wear-resistant corundum ceramic wear-resistant elbow:

The wear-resistant elbow of the backpack is composed of an elbow and a filling cover that is buckled at the outer wall of the elbow, the elbow is a cavity elbow with open openings at both ends, ribs are arranged on the outside of the circumferential wall on both sides of the elbow axis, the length of the rib is the same as the length of the elbow, the arc is the same as the arc of the elbow, the filling cover is wrapped outside the convex outer wall of the elbow, the two sides of the filling cover are connected with the ribs, and the filling cover is filled with wear-resistant corundum material.

The new sealing cover and elbow are made of steel pipes, so that the space for filling wear-resistant materials is uniform, and the filler is not easy to fall off after filling. The thickness of the filler is as high as 100mm or more, the wear-resistant effect is good, and the long service life greatly reduces the number of replacement and repair of wear-resistant elbows, reduces the cost, and reduces the labor and momentum of workers.

There are many manufacturers of wear-resistant elbow production, but the quality is uneven, so we must choose a professional manufacturer.

Design, manufacturing and technical properties, chemical composition, physical properties and packaging and transportation load of ceramic wear-resistant elbows lined with ceramics DL T680-2015 "Technical Conditions for Wear-resistant Pipelines in the Power Industry" requirements.

Backpack wear-resistant elbows.

Ceramic wear-resistant elbows.

Wear-resistant elbows are widely used in the ash conveying industry, and their performance is more wear-resistant and does not block ash. The production requirements for spherical wear-resistant elbows are as follows: 1. The material of spherical elbows requires high-quality carbon steel or; The material of the outlet powder pipe elbow and ball elbow is required to be seamless steel pipe or steel ball.

All spare parts are required to be lined with corundum ceramics, and the two ends of the spare parts should be covered and mined to retain PN16 flanges, which is convenient for the installation of the lining ceramics with dense and smooth surface, and no grooves, bubbles, wear-resistant layers and steel pipes are allowed. The inner lining is uniform and wear-resistant, with an average thickness of not less than 4mm, a hardness of more than Mohs and a wall thickness of 8mm. The strength of the ceramic-lined composite steel pipe is not less than 1100kg m3, the density of the ceramic layer is not less than, the compressive shear strength is 15-20MPa, and the compression feed strength is 300-350MPa.

The outer surface of the spare parts is coated with anti-rust treatment, and the color is black.

(1) Performance comparison.

1.Wear-resistant inter-pressure ceramic patch has excellent wear resistance, 10mm inter-pressure ceramic patch has been used continuously for more than 15 years, and the wear resistance of our company's special ceramics is equivalent to 200 times that of manganese steel and 150 times that of high-chromium cast iron, and the wear resistance is excellent. The application of wear-resistant elbow in the milling system greatly reduces the wear and tear of the equipment, according to more than ten years of on-site operation experience, the annual wear and tear and durability time are at least 15 years, reducing the frequency and cost of maintenance.

2.The wear-resistant elbow is lined with ceramic with high strength, high hardness and light weight.

The Rockwell hardness of wear-resistant ceramics has been determined to be HRA80-85, which is much higher than that of wear-resistant steel and stainless steel. The density is only half of that of steel, and the weight of the ceramic elbow is only 1 3 of the wear-resistant steel elbow, which is easy to install and replace. The inter-pressure ceramic sheet pipe can be made of a smooth transition elbow, which greatly reduces the impact of pulverized coal, minimizes the wear of the pipeline, and prolongs the service life of the wear-resistant pipeline.

The arched ceramic piece can only be in the form of shrimp waist, and the impact of pulverized coal on the outer arc of the elbow is large, and it is easy to wear and leak, and the thickness of the porcelain sheet increases, which greatly increases the weight of the wear-resistant pipe.

3.It has good heat resistance and corrosion resistance.

Interlaminated ceramic sheets are attached to the inner walls of pipes and elbows with a high-strength structural adhesive. The high-strength structural adhesive has high bonding strength, high temperature resistance and aging resistance, and many boiler manufacturers use this adhesive for ceramic mounting in the burner. And the steel bowl is fixed by mutual pressure ceramic patch, which plays a double-layer reinforcement role, and the installation process is simple and the reliability is excellent.

Ceramics are inorganic materials, which do not occur oxidation and rust, and are resistant to acid and alkali corrosion. Compared with arched porcelain tiles, the ceramic tiles are more solid.

4.The inner wall is smooth and does not block the powder.

The inter-pressed porcelain tiles are sintered at high temperature, the structure is dense, and the surface is smooth after grinding and deburring. The mounting process is carried out in strict accordance with the work instructions to ensure the smooth transition of the porcelain tiles, the height difference does not exceed, and the inner wall of the bend pipe after the ceramic is mounted is smooth and smooth without blocking the powder.

b) Comparison.

The thickness of the inter-pressure porcelain tile is only 10mm, and the arched ceramic piece should be 25mm, and the square wear-resistant pipe arch porcelain tile is more than half more than the inter-pressure ceramic piece, which virtually increases the cost of the pipeline, so the inter-pressure porcelain tile has more advantages in the first place.

To sum up, both wear-resistant inter-pressure ceramic patches and arched ceramic patches are the most cost-effective in terms of performance and performance!