A recycling method for cold-pressing small particle oil shale into pellets
A technology for cold-pressing into pellets and oil shale, which is applied in the petroleum industry, special forms of dry distillation, coke ovens, etc., can solve the problems that small particles of oil shale cannot be used, and dry distillation equipment refines oil, etc., and achieves significant social and economic benefits. , avoid waste, improve the effect of utilization
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Embodiment 1
[0027] The recycling method of small grain oil shale cold-pressed ball of the present invention, the detailed steps of this recycling method are as follows:
[0028] A, the preparation of binding agent: represent with weight percentage, binding agent is made up of raw material clay 25%, 525 cement 25% and water glass 50%, at first take pottery clay, 525 cement and water glass according to the raw material composition ratio of binding agent, will The three raw materials weighed are placed in a mixing bucket for stirring, stirred for 2 hours, and the binder for oil shale is obtained after stirring evenly;
[0029] b. The small particle oil shale with a particle size of ≤8mm first enters the drum screen for classification, and the small particle oil shale with a particle size of ≤3mm is discharged through the outlet of the drum screen, and then enters the silo through the conveyor belt; 3mm< particle size≤8mm Small particles of oil shale are discharged through the discharge port ...
Embodiment 2
[0033] Embodiment 2: basically the same as Embodiment 1, the difference is:
[0034] In step a: the binder is composed of 22% of raw clay, 26% of 525 cement and 52% of water glass, and stirred for 1.5h;
[0035] In step b: directly put the small-grained oil shale with a particle size of ≤8mm into a two-stage crusher for crushing, and crush it into oil shale with a particle size of ≤3mm and directly enter the silo;
[0036] In step c: the addition of the binder accounts for 10% of the total weight of the small particle oil shale to obtain an oil shale sphere (the oil shale sphere is elliptical, after testing: the strength is 172kg / cm 2 , with a porosity of 32%);
[0037] In step d: drying in a drying kiln, the drying temperature is 100° C., and the drying time is 14 hours.
Embodiment 3
[0038] Embodiment 3: basically the same as Embodiment 1, the difference is:
[0039] In step a: the binder is composed of 28% of raw clay, 27% of 525 cement and 45% of water glass, and stirred for 1.2h;
[0040] In step b: directly put the small-grained oil shale with a particle size of ≤8mm into a two-stage crusher for crushing, and crush it into oil shale with a particle size of ≤3mm and directly enter the silo;
[0041] In step c: the addition of the binder accounts for 5% of the total weight of the small particle oil shale to obtain oil shale spheres (the oil shale spheres are elliptical, after testing: the strength is 168kg / cm 2 , with a porosity of 33%);
[0042] In step d: use a drying kiln for drying, the drying temperature is 110° C., and the drying time is 13 hours.
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Abstract
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