Paper-making white mud based artificial stone preparation method

Abstract

The invention relates to a paper-making white mud based artificial stone preparation method, and belongs to the technical field of waste reuse. Paper-making white mud is used as a base material and milled and mixed with dolomite powder and medical stones to increase activity, citric acid is used for adjusting the alkalinity of mixture and acidizing the mixture, formation of micropores is increased, tetrabutyl titanate and silane coupling agents are added to modify the mixture, compatibility of the mixture and low-density polyethylene is enhanced, the mixture is mixed with the low-density polyethylene, so that the space among the micropores is filled with the low-density polyethylene, strength and water resistance are enhanced, the mixture is finally mixed with cement, bamboo fibers and the like, mixed materials function as micro-crystals, a space mesh structure is filled with the mixed materials, so that solid gel and fiber crystals grow, matrix compaction is increased, and finally, vibration, drying, demolding and maintenance are performed to prepare artificial stones. The paper-making white mud is sufficiently used, resource utilization of waste is realized, and the prepared artificial stones are simple to manufacture and low in cost.

Description

technical field [0001] The invention relates to a method for preparing paper-making lime mud-based artificial stone, and belongs to the technical field of waste recycling. Background technique [0002] Papermaking white mud comes from the white mud recovery stage of the alkali recovery workshop in the papermaking process; in the papermaking process, the pulping black liquor is extracted, evaporated and concentrated, and roasted in the alkali recovery furnace to obtain a melt, which is dissolved in water to form a green liquor, and then Lime is added to the green liquor for causticizing reaction to obtain white precipitate, which is white mud. According to the existing technology, about 1 ton of lime mud is produced for every 1 ton of pulp produced, and with the increase in the number and scale of alkali recovery systems newly built by pulp and paper enterprises in my country, the produced lime mud will increase and accumulate in a large proportion. [0003] At present, most...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the current disposal methods of papermaking lime mud are mostly landfill or stacking, which is easy to cause environmental pollution, waste of resources and social hazards, and at the same time, the production procedure of artificial stone is complicated and the production cost is high. The present invention Use papermaking white mud as the base material, grind and mix it with dolomite powder and rice wheat stone to increase the activity, then use citric acid to adjust its alkalinity, and at the same time acidify it to increase the formation of micropores, supplemented by adding tetratitanate Modified with butyl ester and silane coupling agent to increase the compatibility with low-density polyethylene, and then through mixing with low-density polyethylene, the low-density polyethylene is filled between the micropores, increasing the strength and Water resistance, finally mixed with cement, bamboo fiber, etc., the mixed product plays the role of microcrystalline nuclei, fills in the space network structure, makes the solid gel and fiber crystallize grow, increases the compactness of the matrix, and finally passes vibration, drying, and demoulding and maintenance, thereby preparing artificial stone, the present invention makes full use of papermaking lime mud, realizes the resource utilization of waste, and the artificial stone prepared by the present invention is simple to manufacture and low in cost