Clay dispersant and preparation method thereof

Abstract

The invention belongs to the technical field of material science, in particular to a clay dispersant and a preparation method thereof. The clay dispersant comprises, by weight, the following raw materials: 15-35 parts of a surfactant; 5-10 parts of a diffusion agent; 8-12 parts of a penetrant; 4-8 parts of a reinforcing agent; 20-30 parts of a stripping agent; wherein the surfactant is a mixture of arachidonic acid amidopropyl hydroxysulfobetaine, trihalogenated N-carbonyl aniline, C14H29(OCOCH(CH3))2OSO3K, stearic acid and sodium hexametaphosphate according to a mass ratio of 3:5:5-10:10:15;the clay dispersant has strong dispersing capability on soil, the surface tension of the soil can be greatly improved, and the clay dispersant can play an emulsifying role in a wide pH value range; the clay dispersant can quickly react with the soil within 5 seconds, so that the viscous soil can be quickly peeled off under the strong decomposition effect, the loss of a shield machine is reduced,and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to a clay dispersant and a preparation method thereof. Background technique [0002] In the process of shield tunneling, the most common problem is that high-clay geological strata are encountered. The clay not only affects the shield tunneling, but also the argillaceous siltstone stratum is softened by water and the excavation of the cutterhead is formed by the accumulation of mud masses attached to the cutterhead. And on the corbels of the cutter head, mud cakes are formed after continuous rolling, which may cause a sharp drop in the torque of the cutter head and wear of the cutter, or cause difficulty in excavation, induce gushing in water-rich strata, and even cause landslides and serious damage to the shield machine . [0003] Chinese patent CN107559015A discloses a shield mud cake treatment method without opening the warehouse, determining a reasonable st...

AI Technical Summary

Problems solved by technology

[0002] In the process of shield tunneling, the most common problem is that high-clay geological strata are encountered. The clay not only affects the shield tunneling, but also the argillaceous siltstone stratum is softened by water and the excavation of the cutterhead is formed by the accumulation of mud masses attached to the cutterhead. And on the corbels of the cutter head, mud cakes are formed after continuous rolling, which may cause a sharp drop in the torque of the cutter head and wear of the cutter, or cause difficulty in excavation, induce gushing in water-rich strata, and even cause landslides and serious damage to the shield machine

[0003] Chinese patent CN107559015A discloses a shield mud cake treatment method without opening the warehouse, determining a reasonable stop position to check the air tightness of the soil warehouse, and then reducing the solid soil content in the soil warehouse and establishing The semi-air pressure balance mode of the soil bin stabilizes the face of the cutter head, and then injects dispersant into the soil bin and the cutter head for soaking. The dispersant penetrates into the slime and decomposes to make the mud cake wrapped on the cutter head and the wall of the soil bin Shedding, and agitation with the rotating cutter head, so that the mud cake in the soil bin is fully and evenly soaked and stirred to disturb the shedding; the dispersant used is shield mudstone dispersant FXY-5, sodium hexametaphosphate, and Kondak HYF -94, BT-T mudstone dispersant, ZKY-202 mudstone dispersant; these dispersants have certain restrictions on the use conditions, and it is difficult to produce effects under the action of acidity or alkalinity, and the pH value range used is basically limited to above 6 ; and the action time is long, it takes at least 50 minutes for the mud cake to completely decompose