Alkaline residue processing method using slurry

Abstract

The invention discloses an alkaline residue processing method using slurry, and the processing method comprises the following steps: the first step, a cofferdam is constructed, and an annular water seepage ditch is dug around the cofferdam; the second step, a water gun or a water cannon is arranged beside an alkaline residue pool, and water is injected into the alkaline residue pool to dilute alkaline residue in the alkaline residue pool into alkaline residue slurry; the third step, the alkaline residue slurry in the alkaline residue pool is conveyed into a mixer through a mud slurry pump; the fourth step, fly ash is put into a ash pool and is diluted with water into slurry, the slurry is conveyed into the mixer through a residue slurry pump to mix with the alkaline residue slurry, and the mixed slurry is conveyed into the cofferdam of the first step through a booster pump; and the fifth step, water content of the slurry in the cofferdam is reduced to design requirements of engineering soils through use of a strong drainage method, and the water discharged from the cofferdam into the annular water seepage ditch is pumped back to the ash pool or / and a mud pool for cycle use. The engineering soils prepared according to the alkaline residue processing method using the slurry, can be used for general-engineering backfill soil, building-foundation-engineering backfill soil, soft foundation treatment engineering soil and highway construction engineering soil.

Description

technical field [0001] The invention relates to a method for treating alkali slag, in particular to a method for using slurry to treat alkali slag. Background technique [0002] Alkali slag is the waste residue discharged during the process of making alkali by ammonia-soda method. The annual production of alkali by ammonia-soda method in my country is about 6 million tons. Due to the characteristics of the ammonia-soda method soda ash production process, 0.3-0.5 tons of soda slag is produced for every 1 ton of soda ash produced. In order to solve the problem of a large amount of alkali slag discharge, the traditional method is to use cofferdams or / and dig ponds to discharge alkali slag, which not only occupies a large amount of land, but also causes serious pollution to the environment. How to make use of alkali slag to turn waste into wealth is a subject of constant research by those skilled in the art. [0003] Relevant reports disclose a method of using alkali slag mix...

AI Technical Summary

Problems solved by technology

But the weak point of its existence is: 1, because the alkali slag in the lower part of the alkali slag pool or the cofferdam is not dry all the year round and is in a colloidal state, so the excavator can only excavate along the edge of the alkali slag pool or the cofferdam. Not only does it bring safety hazards to the excavation operation, but also because the alkali slag lifted by the excavator head is in the form of colloid, the loading capacity of the excavator head is reduced, which greatly reduces the work efficiency

2. The transportation of alkali slag by vehicles is likely to cause the scattering of alkali slag along the way and bring pollution to the environment along the way

3. The alkali slag carried to the designated place will cause secondary pollution to the local environment due to the effect of wind force during the process of flattening and drying and mixing with fly ash or clay