A kind of preparation method of bauxite positive flotation tailings pressure filtration separation filter cloth

Abstract

The invention relates to a manufacturing method of pressure filtration separation filter cloth for direct flotation separation tailings for bauxite and aims at solving the problem that the amounts of suspended matter in water and a filtrate of the separation tailings are large. A first layer is polypropylene multifilament plain woven filter cloth which is a square, fixed edges are formed in the upper and lower edges and the left and right side edges of the square respectively, trapezoidal grooves are formed in the centers of the fixed edges at the left and right sides respectively, fixed holes are formed in the upper fixed edge and the fixed edges at the left and right sides respectively, a circular center hole is formed in the center of the square, a second layer is arranged on the first layer and consists of interior and exterior parts, the exterior part is a square ring, the interior part is a circular ring arranged in the center of the exterior part, the edges of the square of the first layer and the edges of the square ring of the second layer are aligned to each other and sewn together by virtue of a four-wire sewing machine, and the circular ring of the second layer is arranged on the periphery of the circular center hole of the first layer and is sewn together with the periphery of the circular center hole of the first layer by virtue of a three-wire sewing machine. According to the manufacturing method disclosed by the invention, the amounts of suspended matters in the water and the filtrate of the separation tailings both meet the production requirements, the squeezing time is short, and the working efficiency is high.

Description

technical field [0001] The invention relates to a method for manufacturing a bauxite positive flotation tailings press filter separation filter cloth. Background technique [0002] Use bauxite waste slag to produce concentrate through positive flotation process. The aluminum-silicon ratio of bauxite waste slag is 2.00-3.50. There are two stages of dehydration: the first stage, tailings sedimentation tank dehydration, the dehydration rate is 35%-45%; the second stage, press dehydration with HZMGF500 / 2000-U filter press, this filter press is used for tailings dehydration , the required moisture content is 16%-20%, the aluminum-silicon ratio of the product tailings is 1.20-1.50, and the particle size distribution of the tailings is unique, of which -10μm40~45%, 10-19μm13~18%, 19-38μm15~20%, 38 -75μm5~10%, 75-150μm8~12%. Since all the system water in the positive flotation process is self-recycled, it is required that the float in the filter press filtrate be 1.0-1.5 g / L durin...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a method for making bauxite positive flotation tailings press filtration separation filter cloth, which can effectively solve the problem of high water content in the tailings and high floating matter in the filtrate. And single-layer, single filter cloth material and production process of the filter press, it is difficult to meet the secondary dehydration needs of the tailings

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