Method for preparing cement-based grouting material from phosphorus solid wastes through wet grinding technology

Abstract

The invention discloses a method for preparing a cement-based grouting material from phosphorus solid wastes through a wet grinding technology. The method comprises the following steps: carrying out grading crushing on 50-150 parts of phosphorus tailings, and sieving the crushed phosphorus tailings to obtain phosphorus tailing powder; crushing 50-90 parts of phosphorus residues through a crusher to form phosphorus residue powder; adding 6-12 parts of phosphogypsum, 0.5-0.8 parts of a grinding aid, 5-10 parts of an alkali activator and 50-65 parts of water to the phosphorus residue powder, placing the obtained mixture in a ball mill, carrying out ball milling, and ageing the ball-milled mixture for 2-5h to obtain a slurry; and taking 100 parts of cement, 0.8-1.5 parts of a water reducer, 5-8 parts of an expanding agent and 1.0-1.8 parts of an antifoaming agent, adding the phosphorus tailing powder and the slurry, and uniformly stirring all above materials in a stirrer to obtain the cement-based grouting material. The phosphorus solid wastes are adopted as a main raw material, wet grinding is adopted to substitute dry grinding, and the phosphorus tailings are adopted as aggregates, so the close packing and micro-aggregate effects are realized through particle size control, the potential activity of raw materials is fully displayed, and the cement-based grouting material has the advantages of good compactness, low energy consumption and low production cost, and can be applied to industries and building engineering.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a method for preparing cement-based grouting materials by using a phosphorus solid waste wet grinding process. Background technique [0002] At present, the phosphoric acid production in my country mainly adopts the wet process phosphoric acid process, and the solid phosphorus waste is the solid waste generated during the production of phosphate rock, including: phosphorus tailings, phosphorus slag, phosphogypsum, etc. [0003] Phosphorus tailings are solid wastes that cannot be utilized during the flotation of phosphate ore concentrates. Although my country's phosphate rock reserves are relatively large, the main feature is "more low-grade ore and less rich ore". According to the requirements of phosphoric acid production process conditions, most of the phosphate rock needs to be enriched by ore dressing to meet the production of phosphoric acid and high-concentrati...

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Problems solved by technology

Because grouting materials have high requirements on structural compactness, the particles in grouting materials need to be designed according to the principle of compound particle grading, such as the large-volume steel slag grouting material of CN103641424, which has poor structural compactness

CN102515651 A kind of cement-based grouting material and its preparation method, using cement as the main cementitious material, the cost is relatively high

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