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Study on the Preparation and Features of Coal Pitch-Alcohol-Water Slurry

Author: LiuXiao
Tutor: WangLi
School: Shandong University of Science and Technology
Course: Mineral Processing Engineering
Keywords: The industrial alcohols coal asphalt water slurry Grinding Fluid type Slurry performance Clean fuel
CLC: TQ536
Type: Master's thesis
Year: 2008
Downloads: 18
Quote: 0
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Abstract


Industrial alcohols, coal tar pitch water slurry from coal pitch powder, alcohols, water, and minor amounts of additives mixed the like fluid fuel. As a new type of fuel, it has a low ignition point, high combustion efficiency, produce less ash, strong environmental advantages. Firstly, the study of of industrial alcohols coal tar water slurry preparation technology. Experimental results show that the ratio of each material interested slurry a major impact on the fluidity of the aqueous slurry of industrial alcohols coal pitch, slurry viscosity, the slurry stability and pulping studies, taking slurry costs and the calorific value of the fuel that water slurry of coal tar ethanol coal tar content of about 50% ethanol content of 18% -19% 31% -32% of the water content of coal water slurry in methanol coal tar bitumen content of 45% - 50%, 20% -25% of the methanol content, the best performance of all aspects of the water content of about 30%; wet grinding using simple batch feeding mode operation, ideal grinding up to 92.33%, -200 mesh material yield pulp and liquidity; dispersant wet grinding preparation of the industrial alcohols coal tar water slurry can reduce the viscosity of the slurry to improve the efficiency of the grinding; coal tar pitch dry mill ethanol coal tar water slurry, methanol, coal tar water the pulp grinding kinetic equation were: R (t) = 100exp [- (-0.11268 0.00132 · d 1.09279 ) · t (1.85974-0.26352 · 1nd) ] ; R (t) = 100exp [- (-1.3564 0.43454 · 1nd) · t (-0.42203 0.195241 · 1nd) ]; R (t) = 100exp [- (-0.02975 0.02908 · d 0.67972 ) · t (-0.12083 0.13259 · 1nd) ] on the basis of the slurry preparation process research, the paper also carried the performance of industrial alcohols coal pitch water slurry paste . Experimental results show that, to change the material ratio of the slurry, can change the rheology of the slurry, the slurry by the slight bulging plastic into approximate Newtonian fluid yield pseudoplastic fluid; reasonable control of the amount of the dispersing agent to be added can be reduced slurry Table Concept viscosity, change the slurry type of fluid, to improve the performance of the slurry fuel, wherein the naphthalene-based sulfonate surfactant aqueous slurry of industrial alcohols, coal tar pitch has good dispersion properties, MC dosage of the aqueous slurry of ethanol coal pitch 1% of the bitumen quality of the coal, the slurry viscosity of 85.5 mPa's, good fluidity; complex dispersant can reduce industrial alcohols coal pitch aqueous slurry of pulp viscosity and enhance stability and control pulp costs, but the selected monomer dispersion type of agent with the right ratio, MC and lignin calcium sulfonate complex with the complex ratio of 5:5 slurry viscosity 154.5 mPa's, can be stable for about three weeks, liquidity and stability more desirable; polymer organic compounds can effectively increase the stability of the aqueous slurry of industrial alcohols, coal tar pitch, to solve the problem of the stability of the slurry, of carboxymethyl cellulose do stabilizers improve the slurry stability of the most obvious, slurry stand for four months does not produce hard precipitation; relative to ordinary coal-water slurry fuel, ignition of industrial alcohols coal pitch water slurry, high calorific value, more complete combustion, high combustion efficiency, combustion ash, environmental benefits .

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CLC: > Industrial Technology > Chemical Industry > Processing and utilization of coal chemical and coal > Coal processing and utilization
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