Pretreatment method for raw material of coal-based needle coke
A needle coke and pretreatment technology, which is applied in tar processing, tar pitch/petroleum pitch/natural pitch processing, petroleum industry, etc. It can solve problems such as complex process, high investment cost, and unsatisfactory purification effect , to achieve the effect of simple production process, high coking yield and large-scale production
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Embodiment 1
[0039] The raw coal tar and the diluent washing oil are added to the stirring tank 1 according to the mass ratio of 1:1, and mixed thoroughly; the mixed liquid is pumped out by the raw material pump 2 and sent to the heated and pressurized filter tank 4, where the heated and pressurized filter tank The filter material layer laid in 4 is composed of diatomite and stainless steel filter screen, the particle size of diatomite particles is 70 mesh, the mesh number of stainless steel filter screen is 300 mesh, and the thickness of the filter layer is 5 cm; Inject filter kettle 4 into N 2 , pressurized to 0.2MPa, heated to 100°C, and the hot-filtered mixed solution was added to the three-legged centrifuge 9, the filter cloth mesh of the centrifuge was 800 mesh, and it was centrifugally filtered at a speed of 1000 rpm to obtain The diluent was distilled from the centrifuge at 260°C under atmospheric pressure to obtain pitch for the production of coal-based needle coke, with a content...
Embodiment 2
[0041] Add the raw coal tar pitch and diluent light oil into the stirring tank 1 according to the mass ratio of 1:1, and mix thoroughly; the mixed liquid is pumped out by the raw material pump 2 and sent to the heated and pressurized filter tank 4, where the heated and pressurized filter tank The filter material layer 5 of laying in 4 is combined by expanded perlite and stainless steel filter screen, and the particle size of expanded perlite particle is 100 orders, and the stainless steel filter screen order number is 300 orders, and the filter layer thickness is 5 centimetres; Pressure filter kettle 4 into N 2 , pressurized to 0.8MPa, heated to 180°C, and the hot-filtered mixed solution was added to the three-legged centrifuge 9, the filter cloth of the centrifuge was 800 mesh, and centrifugally filtered at a speed of 1000 rpm to obtain The diluent was distilled from the centrifuge at 260°C under atmospheric pressure to obtain pitch for the production of coal-based needle cok...
Embodiment 3
[0043]The raw material remixed soft asphalt and diluent light oil are added to the stirring tank 1 according to the mass ratio of 1:5, and fully mixed; the mixed liquid is pumped out by the raw material pump 2 and sent to the heated and pressurized filter tank 4, where it is heated and pressurized The filter material layer 5 laid in the filter kettle 4 is combined by diatomite and stainless steel filter screen, and the particle size of diatomite particle is 200 orders, and the stainless steel filter screen mesh number is 700 orders, and the filter layer thickness is 7 centimeters; The heated and pressurized filter kettle 4 is injected with N2, pressurized to 1MPa, heated to 150°C, and the hot-filtered mixed solution is added to the three-legged centrifuge 9. The filter cloth of the centrifuge is 1000 meshes, and the Centrifugal filtration at a speed of 100°C, and distill the diluent from the obtained centrifugate at 280°C under normal pressure to obtain pitch for the production...
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