1. Wet spraying forming lining of wear-resistant ceramic material.

◆ The technology uses high-strength synthetic materials, composite ultra-fine powder, special additives, composite additives and other raw materials, carefully formulated according to the principle of the most compact accumulation, adopts mechanized spraying process, and is equipped with high-quality anchors as skeleton, and skillfully combines advanced inorganic synthesis technology with directional mesh reinforcement method to form a working lining with special performance.

◆ Process technology and performance characteristics of lining materials:

(1) with high mechanical strength and rigidity

The Rockwell hardness of the lining material is HRA80-90, far more than wear-resistant steel and stainless steel, and the service life will not be reduced due to material erosion during use.

(1) Excellent wear resistance

The wear resistance is equivalent to 26 times of anchor steel and 17 times of high chromium cast iron. Under the same working conditions, the service life of the equipment shall not be extended by more than several times.

(2) Excellent thermal shock stability.

Because the lining material has an advanced combination and the use of directional mesh skeleton reinforcement, it effectively prevents damage and peeling caused by thermal stress.

(3) Good high temperature mechanical properties and corrosion resistance.

Due to the adoption of advanced inorganic synthesis technology, the strength of the lining material increases continuously with the increase of temperature in the range of 200-1200 ℃, which effectively ensures the chemical stability and mechanical properties of the material at high temperature.

(4) The construction speed is fast, and the overall sealing of the lining is good.

Mechanized spraying not only improves the efficiency of the operation, but also ensures the uniformity of the lining material and the consistency of the lining structure due to the continuous operation.

◆ Application examples:

Anti-wear spraying of large flue of sintering machine: Angang Xinpu Iron and Steel Company Jiyuan Iron and Steel Group Co., Ltd. Jiangsu Shente Iron and Steel Company Changzhou Dongfang Special Steel

Pellet Hard Furnace Spraying: Xinjiang Da'an Iron and Steel Company Linzhou Heavy Machinery Iron and Steel Company Angang Group Yongtong Company Shandong Jiangxin Iron and Steel Company

◆ See Table 4 below for technical indicators

2, Toughened wear-resistant ceramic material plastic forming lining

◆Technical features:

(1) With high-quality synthetic materials, composite ultra-fine powders, microcrystalline accelerators, and self-made binders as the base material, through the most compact particle gradation combination, the combination system of polymerization and chemical bonding is achieved.

(2) Adopt non-directional fiber and directional net skeleton double toughening and reinforcement measures.

(3) The method of combining manual coating and vibration compaction.

◆ Lining characteristics.

(1) early strength, high strength. More than 50% higher than the early strength and age strength of conventional wear-resistant castables.

(2) Excellent wear resistance, 50 times that of plain carbon steel and more than 20 times that of high manganese steel.

(3) The lining has good volume stability and no macro defects in long-term use at working temperature, which effectively suppresses the abnormal expansion and corrosion of lining materials caused by dust-containing process airflow.

(4) The use temperature can reach 1200 ℃, and at this temperature, the strength continues to increase.

(5) After the construction is completed, it can be put into use for 24 hours without special maintenance measures, and the strength can reach more than 70% of the maximum value.

(6) It is suitable for wear-resistant and corrosion-resistant lining with short maintenance period and quick repair, especially under the working conditions near the dew point of nitrogen and sulfur oxides, the corrosion-resistant effect is obviously better than that of traditional wear-resistant and acid-resistant cement.

◆ Application examples:

Sintering machine flue, desulfurization flue and elbow, cyclone dust removal pipeline, coal mill powder pipeline, circulating fluidized bed boiler horizontal flue, thermal kiln flue, etc.

◆ See Table 4 for technical indicators

3, metal-ceramic materials integrated anti-wear technology

◆ Features of integrated anti-wear technology

(1) According to the working conditions and design requirements, scientific selection and preparation can meet the performance of wear-resistant refractory corrosion-resistant ceramic composite materials.

(2) The ceramic composite material is reasonably and scientifically packaged on the treated metal surface to form an integral component, and the packaged high-performance ceramic material is the working layer of the component.

(3) the packaging process can be carried out in the use of the site, can also be prefabricated in the manufacturer.

(4) After the package is completed, the overall component should be processed according to the nature of the ceramic composite material used to strengthen the performance of the material.

(5) This technology is conducive to the rapid replacement of parts on site, and the pre-assembly and strengthening process greatly extends the service life of the parts.

◆ Examples of application parts:

(1) For the distribution chute on the top of the blast furnace, the protective layer of ceramic material with high temperature resistance and erosion resistance is packaged on the outer surface of the bottom of the chute body, and the structures such as supporting plate and rib plate are added to the key parts such as goose head body, which effectively prevents the occurrence of serious deformation, fracture, falling off and other accidents of the chute, reduces the number of replacement of the chute, and improves the equipment utilization efficiency.

(2) Wear-resistant ceramic elbow: By encapsulating ultra-high strength wear-resistant ceramic coating with appropriate thickness in the welded elbow and tee lining as a protective layer, the problem of wear-resistant lining of special-shaped metal pipe fittings is better solved, and the problem of wear-resistant lining of special-shaped metal pipe fittings can be pre-made for standby and replaced with damage.

◆ The technical indicators of ceramic composite materials used are shown in Table 4.

4. Casting molding process of high-performance wear-resistant and corrosion-resistant ceramic materials

◆ Process characteristics

(1) The use of high-performance synthetic raw materials, inorganic synthesis technology, composite admixture plasticization, special fiber addition and other advanced technologies to ensure the construction performance of pouring and the use of the molded lining.

(2) It is suitable for the use environment with complex working conditions, large operation volume and high performance requirements, such as blast furnace slag flushing ditch, which requires the ditch lining material to resist erosion, wear resistance and thermal impact resistance.

◆ See Table 4 for material technical indexes

Table 4 Technical indicators of wear-resistant ceramic materials