JB/T 10731-2017Wet limestone ball mills for desulfurization (English PDF)

3.1 Type

The types of mill are shown in Figures 1 and 2, in which the specific structure is not specified.

Figure 1 Wet overflow limestone ball mill for desulfurization

Figure 2 Wet grate limestone ball mill for desulfurization

3.2 Model

The model designation of mill shall meet the requirements of GB/T 25706, as follows:

Example 1:

The wet overflow limestone ball mill for desulphurization with a cylinder diameter of 2,700mm and a cylinder length of 6,000mm is designated as:

MST-2760 limestone wet ball mill for desulphurization

Example 2:

The wet grate limestone ball mill for desulphurization with a cylinder diameter of 2,700mm and a cylinder length of 5,500mm is designated as:

MSGT-2755 limestone wet ball mill for desulphurization

3.3 Basic parameters

The basic parameters of mill shall meet those specified in Tables 1 and 2.

Table 1 Basic parameters of wet overflow limestone ball mill for desulphurization

Model Cylinder diameter mm Cylinder length mm Effective volume of cylinder m3 Maximum ball load t Working speed r/min Power of main motor kW Ore discharge granularity

µm Production capacity t/h Reference weight of machine t

MST-1535 1500 3500 5.2 8 26.3~30.4 <=75 <=44 1~1.9 13.2

MST-1842 1800 4200 9.1 13 22.2~27.2 <=110 2~3.5 32

MST-2150 2100 5000 15.1 22 22.2~25.2 <=200 4~6.5 43

MST-2254 2200 5400 18.0 26 21.7~24.5 <=280 6~8 52

MST-2458 2400 5800 23.2 34 20.8~23.5 <=355 9~11 58

MST-2558 2500 5800 24.9 38 20.3~23.6 <=400 10~12 60

MST-2760 2700 6000 30.4 44 19.6~22.2 <=500 13~15 66

MST-2765 2700 6500 33.4 50 19.6~22.2 <=560 14~17 70

MST-2965 2900 6500 38.33 55 18.9~21.4 <=630 17~20 82

MST-2970 2900 7000 41.28 62 18.9~21.4 <=710 19~21 85

MST-3264 3200 6400 46.45 66 18.0~20.4 <=800 22~25 97

MST-3270 3200 7000 50.8 75 18.0~20.4 <=900 24~28 100

MST-3280 3200 8000 58.1 85 18.0~20.4 <=1000 27~30 102

MST-3480 3400 8000 65.96 94 17.4~20.2 <=1120 33~37 110

MST-3675 3600 7500 69.7 100 17.0~19.2 <=1250 36~40 131

MST-3680 3600 8000 74.35 110 17.0~19.2 <=1400 38~44 134

MST-3685 3600 8500 79 117 17.0~19.2 <=1600 40~48 137

MST-4080 4000 8000 92.65 133 16.1~18.6 <=1800 50~57 162

MST-4085 4000 8500 98.4 145 16.1~18.6 <=2000 57~61 172

MST-4090 4000 9000 104.23 155 16.1~18.6 <=2100 60~65 179

Note 1: The reference weight of machine does not include the weight of main motor and reducer.

Note 2: The production capacity in the table refers to the estimated value assuming that the grindability index of limestone is WiB=9~11, the feeding granularity is <=20mm, the ore discharge granularity is <=44µm, and the pass rate is 90%.

Table 2 Basic parameters of wet grate limestone ball mill for desulphurization

Model Cylinder diameter mm Cylinder length mm Effective volume of cylinder m3 Maximum ball load t Working speed r/min Power of main motor kW Ore discharge granularity

µm Production capacity t/h Reference weight of machine t

MSGT-1838 1800 3800 8.20 11 23.2~27.2 <=110 <=44 3 33

MSGT-2145 2100 4500 13.60 18 22.2~25.2 <=200 5 44

MSGT-2245 2200 4500 18.16 24 21.7~24.5 <=280 7 51

MSGT-2450 2400 5000 20.00 27 20.8~23.5 <=380 10 57

MSGT-2755 2700 5500 27.86 37 19.6~22.2 <=500 14 68

MSGT-2960 2900 6000 35.35 47 18.9~21.4 <=630 18 80

MSGT-3268 3200 6800 49.30 66 18.0~20.4 <=1000 27 110

MSGT-3675 3600 7500 68.80 92 17.0~19.2 <=1400 40 135

Note 1: The reference weight of machine does not include the weight of main motor and reducer.

Note 2: The production capacity in the table refers to the estimated value assuming that the grindability index of limestone is WiB=9~11, the feeding granularity is <=20mm, the ore discharge granularity is <=44µm, and the pass rate is 90%.

4.1 Basic requirements

4.1.1

The mill shall meet the requirements of this standard and manufactured according to the drawings and technical documents approved by established procedure.

4.1.2

The technical requirements of raw materials, purchased parts and processing, assembly and installation not specified in this standard shall meet the requirements of national standards and relevant general professional standards.

4.1.3 Service conditions

ambient temperature: -5°C~40°C;working system: continuous.

4.1.4

The cutting parts, weldments, castings, forgings and painting of the mill shall comply with the requirements of JB/T 5000.9, JB/T 5000.3, JB/T 5000.6, JB/T 5000.8 and JB/T 5000.12 respectively.

4.1.5

The anti-corrosive treatment shall meet the requirements of HG/T 20678 and HGJ 229.

4.2 Complete machine performance requirements

4.2.1

The main technical parameters of the mill shall comply with the requirements of this standard and be applicable to the system process requirements.

4.2.2

The oil return temperature rise of the main bearing shall not exceed 15°C, and the maximum oil return temperature shall not exceed 55°C.

4.2.3

Dynamic and static pressure main bearings are recommended for mills with cylinder diameter greater than or equal to Phi2,400mm; rolling bearings may be adopted for mills with cylinder diameter less than Phi2,400mm.

4.2.4

The lubricating device of the mill shall operate reliably. If it is equipped with a lubricating station, the oil pump motor and the main motor shall be provided with electrical interlocking device which shall send a signal in case of fault in the lubricating system, so as to ensure that the main motor stops automatically; and alarm signal devices for oil temperature, oil pressure, oil volume and differential pressure shall be equipped. The lubricating system shall be equipped with safety devices such as safety valve, pressure gauge and thermometer. The inclination of the oil return pipeline shall not be less than 1:40.