Preparation method for fine rubber powder

Abstract

The invention provides a preparation method for fine rubber powder. The preparation method comprises the steps of raw material treating, grinded material mixing, grinding, wet sieving, dehydrating, drying, dry sieving and packaging. According to the preparation method for the fine rubber powder provided by the invention, pre-crushed coarse granular rubber blocks and water are sufficiently mixed, and then are grinded in a circulating mode in a closed assembly line, and automatic drying, sieving and packaging of rubber powder are realized. The preparation method is high in degree of automation, is low in cost, and can be used for preparing ultrafine-grain fine rubber powder without pollution. The fine rubber powder prepared by the preparation method is combined with the surface of a raw rubber group so as to be in canine-tooth-alternating embedding, and therefore, net-shaped contact area is greatly increased in a spatial three-dimensional direction, combination of rubber powder and virgin rubber can be remarkably improved, and combination strength, toughness and wear resistance of glue are greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of rubber powder production, in particular to a method for preparing fine rubber powder. Background technique [0002] At present, my country's rubber recycling technology basically stays at the stage of reclaimed rubber, while the reclaimed rubber technology has long been eliminated abroad, and the production of rubber powder is generally the mainstay. The production of rubber powder represents the development direction of the world's rubber recycling technology, and it has become the consensus of the world's rubber industry. The smaller the particle size of rubber powder, the larger its specific surface area, and the better its physical and chemical properties when reused. It is a worldwide problem to prepare high-quality fine rubber powder with low cost and high efficiency. [0003] At present, the production of rubber powder basically adopts two preparation processes: dry method and freezing method. T...

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Problems solved by technology

However, the rubber powder prepared by the wet method needs to be dried after grinding, especially the traditional wet grinding. Since the rubber powder is simply mixed with water and then directly ground, the dryness of the wet rubber powder produced by grinding is generally 10%-20. %, adding a large amount of drying burden for the subsequent drying. According to actual production statistics, the production of each ton of rubber powder needs to consume 100 kWh of electric energy and 80 cubic meters of natural gas. The energy consumption is very high. According to actual production statistics, if wet rubber powder For every 1% increase in relative humidity, the subsequent drying cost needs to increase by 5%, but the amount of water in the rubber powder should not be added too little. In actual production, the weight ratio of wet rubber powder to water for rubber powder prepared by wet method is generally About 1:5, otherwise it will not achieve the effect of eliminating the high temperature and odor generated during the crushing process and reducing the damage to the rubber molecular structure

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