Graphite bipolar plate for fuel cell and manufacturing process therefor

[0048] Preparation example 1-4 of diabase fiber powder

[0049] Preparation Example 1-4 The coke particles were selected from Anyang Yuding Metallurgy Co., Ltd., the dolomite was selected from Lingshou County Dongfeng Dolomite Co., Ltd., and the carbon nanotubes were selected from Beijing Deke Daojin Technology Co., Ltd., the model is CNT104.

[0050] Preparation Example 1: Mix diabase ore, coke grains and dolomite at a mass ratio of 1:0.3:0.2, melt at 1450°C, and draw at a speed of 3m/min to make a fiber intermediate. During the process, the carbon nanotubes are atomized and sprayed onto the surface of the fiber intermediate at a pressure of 6 MPa. The thickness of the carbon nanotubes is 0.1um, dried at 120°C for 2 hours, and crushed to obtain diabase fiber powder. The chemical composition of the dolomite is shown in Table 1. The mass ratio of calcium oxide and magnesium oxide in dolomite is 2:1, the fixed carbon content in coke particles is 84%, the sulfur content is 0.8%, the volatile matter is 2%, and the ash content is 13.5%. %, the calorific value is 4602kcal/kg, the particle size of diabase and dolomite is 20mm, and the particle size of coke particles is 60mm.

[0051] Table 1 Chemical composition of diabase

[0052] wt SiO 2

[0053] Preparation example 2: Mix diabase ore, coke particles and dolomite at a mass ratio of 1:0.4:0.3, melt at 1480°C, and draw at a speed of 3.3m/min to make a fiber intermediate. In the process, the carbon nanotubes are atomized and sprayed onto the surface of the fiber intermediate at a pressure of 8 MPa. The thickness of the carbon nanotubes is 0.2um, dried at 130°C for 1.5h, and crushed to obtain diabase fiber powder. The chemical composition of greenstone is shown in Table 1. The mass ratio of calcium oxide and magnesium oxide in dolomite is 2:1, the fixed carbon content in coke particles is 84%, the sulfur content is 0.8%, the volatile matter is 2%, and the ash content The calorific value is 13.5%, the calorific value is 4602kcal/kg, the particle size of diabase and dolomite is 50mm, and the particle size of coke particles is 90mm.