Method for treating and utilizing large-particle waste sand in waste liquid generated in process of preparing alkali by ammonia-alkali method

• Main Authors: YUAN LI, ZHANG RAN, WANG GUODONG, WANG XIAOYA, LI TIANRUO, DONG HUI, YIN WEI, LI MIN, ZHU SHENGXUE
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, ORTHE LIKE; FIXED CONSTRUCTIONS; LIME, MAGNESIA; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a method for treating and utilizing large-particle waste sand in alkali waste liquid produced by an ammonia-alkali process, which comprises the following steps: treating large-particle waste sand, reducing the content of soluble salt in the waste sand by washing, controlling the content of soluble salt in the waste sand to be less than or equal to 2%, designing the mix proportion of lime cement soil of the waste sand, and replacing soil in the lime cement soil with different amounts of waste sand. The mass ratio of admixture lime to cement in each group of test design is not changed, and the content of soil is gradually reduced corresponding to the proportion gradient of waste sand; performing a compaction test on each group of materials with different target water contents to obtain the maximum dry density and the optimal water content of the sample; determining an optimal ratio of a waste sand replacement interval of the waste sand lime cement to a waste sand lime cement material, wh