T/SDGSY 15-2023 Circulating fluidized bed boiler with high-strength wear-resistant castable material

Scope

Scope: This document specifies the definition, product classification, technical requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of high-strength wear-resistant castables for circulating fluidized bed boilers. This document applies to high-strength wear-resistant castables for circulating fluidized bed boilers. Main technical content: 5 Technical requirements: The physical and chemical properties of high-strength wear-resistant castables shall comply with the requirements specified in Table 1. Table 1: Physical and chemical properties Indicator NMJ-11 NMJ-10 NMJ-9 Al2O3/% ≥75 ≥75 ≥65 Bulk density (g/cm3) 110℃ Ă— 24h ≥2.75 ≥2.70 ≥2.65 1000℃ Ă— 3h ≥2.80 ≥2.75 ≥2.70 Compressive strength/MPa 110℃ Ă— 24h ≥100 ≥80 ≥70 1000℃ Ă— 3h ≥140 ≥110 ≥100 Flexural strength/MPa 110℃ Ă— 24h ≥15 ≥11 ≥10 1000℃ Ă— 3h ≥20 ≥13 ≥13 Heat expansion rate (%)/1000℃ Ă— 3h ±0.3 ±0.3 ±0.3 Room temperature abrasion resistance/cm3 1000℃ Ă— 3h ≤4 ≤6 ≤6 Thermal shock stability/cycles 1000℃, water-cooled ≥25 ≥25 ≥20 Fire resistance/℃ / ≥1750 ≥1750 ≥1700 Initial setting time/min / ≥45 Final setting time/min ≤240 Thermal conductivity/[W/（m·K）] Reference value at 1000℃ 2.0~2.5 1.3~1.7 1.3~1.7 Recommended maximum operating temperature/℃ 1600 1550 1450 6 Test methods Sample preparation: Follow the provisions of GB/T 4513.5. Determination of Al2O3 content: Follow the provisions of GB/T 6900. Bulk density test: Follow the provisions of GB/T 4513.6. Compressive strength test: Follow the provisions of GB/T 5072. Flexural strength test: Follow the provisions of GB/T 3001. Heat expansion rate and recommended maximum operating temperature test: Follow the provisions of GB/T 5988. Room temperature abrasion resistance

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