Inner enamel production process and equipment selection:
1. Production process:
Inner liner sandblasting, wet glazing, one coating and one firing, sintering process temperature 830-860 ºC, drying temperature around 70-120 ºC, sintering time: can be infinitely adjusted according to product requirements. The maximum product can reach above 800 ºC for 10-12 minutes.
2. Production process: Inner liner sandblasting, inner liner coating, enamel drying, sintering
3. After the sandblasting of the inner liner is completed, it is manually placed at the coating station. After coating is completed, it is manually transferred to the conveyor chain and automatically enters the drying room for drying. It is manually inspected and processed before entering the sintering furnace for automatic sintering and is manually removed from the furnace. (The handling equipment shall be provided by the customer)
4. Equipment selection
Complete set of liner sandblasting machine, liner coating machine, sintering furnace, drying furnace, and conveyor chain.
4, Structure and configuration of inner liner sandblasting equipment:
1. Equipment parameter description:
(1) Abrasive: Alloy steel sand.
(2) Total land area: approximately 12 meters by 6 meters.
(3) Human machine separation: Each workstation has safety and reliable control measures, and there are prominent safety signs at each workstation.
(4) Transportation method: Two way unpowered overhead crane transport trolley; Simultaneously process 3 pieces, with upper and lower piece areas on both sides
(5) Sandblasting treatment:
The inner wall of the liner is sandblasted using a 3-gun automatic sandblasting machine;
Three different spray angle nozzle spray guns are used in combination at three workstations to complete sandblasting or soot blowing treatment (top head sandblasting, side sandblasting, bottom head sandblasting, and sandblasting and soot blowing treatment);
Adopting a pressure wheel to automatically position and fix the workpiece, and the spray gun automatically lifts and rotates;
(6) Abrasive recycling method: mechanical automatic separation and recycling;
(7) System control:
Adopting PLC screen control;
It can be automatically controlled throughout the entire process or manually controlled step by step;
Touch screen setting, the operator selects on the touch screen based on the incoming material in front, so that the subsequent workstations can automatically adjust the type;
(8) Sandblasting quality standards:
Meet the coating standards;
According to ISO 8501-1 standard testing, the cleanliness after sandblasting reaches Sa2.0-2.5 level;
According to the ISO 8503-1 standard, the roughness after sandblasting is Rz25-125mm (depending on the coating thickness).
(9) Dust emissions comply with national environmental standards: dust emission concentration ≤ 1mg/m3, environmentally friendly, unorganized emission standards, can be directly discharged from the workshop.
(10) The operating noise of the equipment is less than 85dB.
(11) Equipment power requirements: three-phase AC 380V ± 10% 50Hz (+0.5 Hz -1 Hz), power supply TN-S (three-phase five wire L1 L2,L3,N,PE); Power ≤ 25Kw.
(12) Compressed air: oil content ≤ 0.01mg/m3, water content ≤ 1.3 g/m3 (atmospheric dew point reaches -20 ºC~-23 ºC), dust content ≤ 3mg/m3; 0.8Mpa,39m³/min; The compression system has a power of approximately 260 kW.
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