A kind of brine mud backfilling method

Abstract

The invention provides a brine-mud backfilling method which comprises the following steps of (1) selecting a blowoff chamber and a brine return well, (2) extracting brine mud, (3) injecting the brine mud, and (4) recycling brine and washing pipes and wells. According to the brine-mud backfilling method, production cost is low, operation is simple, the size of the top of a solution cavity of a mine is expanded, the phenomena of well blocking and pipe blocking are avoided, environment is protected, the mine can be utilized for a long time, and more brine is produced.

Description

technical field [0001] The invention relates to a method used in the salt making process, in particular to a brine mud backfilling method. Background technique [0002] With the rapid development of the chemical industry and the improvement of people's living standards, the requirements for salt quality have also increased. brine contains Ca 2+ , Mg 2+ , SO 4 2- If brine purification is not carried out, the impurities brought into the finished salt will affect the quality of the salt, which cannot well meet the requirements of some special industry raw material salt. In order to improve the effective production time and improve the product quality of salt, brine purification process must be adopted Removal of Ca in raw brine 2+ , Mg 2+ , SO 4 2- and other impurity ions, and the use of brine purification process will inevitably produce calcium magnesium mud waste residue. [0003] Salt-making enterprises have not been able to find an ideal way to deal with the waste ...

AI Technical Summary

Problems solved by technology

[0005] This method has been greatly improved in the brine mud backfill technology, but there are still the following deficiencies: first, the method is only applicable to the salt mud treatment method of sodium sulfate type brine; second, the clarification and stratification of salt mud takes time due to stratification , which is not conducive to continuous production and mud discharge, and the concentration of the remaining salt mud after stratification is too high, which will increase the load on the mud tank agitator, causing the agitator to stop and other phenomena, even if it is diluted with fresh water when returning to the well, it is easy to cause drainage The mud pipeline is blocked; the third is that the cleaning and brine mining time is short, and the long-term slag discharge will easily cause the salt mud to overflow after the mine is filled, causing pollution, and it is time-consuming, laborious and costly to find a new rock salt solution mine