Phosphorus fine pulp DRA performance evaluation of the experimental device research and application
|Keywords||Phosphate concentrate slurry DRA Evaluate Experimental device|
Slurry pipeline transportation is a liquid (usually water) as a carrier through the pipeline conveying granular materials. Concentrate and tailings metal mine and nonmetal mines, thermal power plant fly ash, pulverized coal coal washing, filling pit mining tailings and water conservancy sand and other granular materials include water mixture is the slurry. Compared to other modes of transport, slurry pipeline transport method has many advantages. DRA is such an additive, it can be added to the fluid will greatly reduce the energy dissipation in the turbulent conditions, so that the fluid resistance is reduced, traffic flow improve. This flow drag reduction phenomenon has been widely used in the field of fire, military, water conservancy, oil pipeline, and achieved good results. Currently, research in this area target is to continuously improve its drag reduction efficiency at the same time, as far as possible to enhance its shear stability and reduce the cost. Phosphorus concentrate slurry DRA experimental evaluation, the evaluation experimental design; achieved primarily through the following process, through questions, design conditions control, laboratory operations, data processing, validation process, concluded to Experimental evaluation process. The study design and the actual production of a Filter Evaluation of the DRA can be applied to the pulp and other non-homogeneous liquid conveying means, the apparatus has a certain measurement accuracy and good experimental stability, can be played on the DRA Screening stable role in the evaluation. To solve this problem, the researchers repeated visits to the production site, the researchers selected the experimental pipeline design and measurement instrumentation, based on the analysis of research data. Design aqueous heterogeneous fluid flow experiments can be performed with a certain measurement accuracy means for performing a series of experiments. Can learn from the stability testing of the experimental apparatus, good stability of the self-designed experimental device, the fluctuation range of the maximum error of only 1.5%, the set of device can meet the measurement accuracy requirements of the experiment. The drag reducing agent selected for the single-component test different concentrations DRA test experiment, mainly under the same experimental conditions, was found by experimental analysis to filter out of the three additive from the low concentration to the high concentration, the concentration of the more more long-duration high resistance reduction effect is more obvious, and reduce the resistance, from a comparative point of view the additive B to enhance the effect of the flow is the most obvious, and can be increased to a maximum flow of 45.59% (concentration of 50ppm); the additives C for longest, in still for 26 minutes to enhance the flow rate of 14.21% (concentration of 50 ppm). Experiment can be preliminary selection of additives for the B, C, and optimal concentration of 50ppm. The project is expected to enable the the phosphate concentrate transmission capacity increased to 10 million tons, and annual savings of transportation costs 3,000,000 DRA conditions from wet process phosphoric acid output value, reduce the cost of production of phosphoric acid, and choose no precedent with the promotion and application value.