SU1201231A1 - Method of removing suspended substances stabilized with soluble glass from circulation water - Google Patents

Abstract

A METHOD FOR CLEANING WASTE WATER FROM SUSPENDED SUBSTANCES STABILIZED BY FLUID GLASS, including acidification followed by the introduction of coagulant, settling and separation of the solid and liquid phases, characterized in that, in order to increase the degree of purification, acidification of the acidic acid lines is performed by acidification of the acidic lines that are used in acidification by acid or by acidification in order to increase the degree of purification;

Description

The invention relates to methods for purifying circulating water from suspended substances stabilized by liquid glass in an alkaline medium, and can be used to brighten tail pulps from 1 concentrator 1x limits.

The purpose of the invention is to increase the degree of purification.

P RIM er 1. Circulating tail pulp of scheelite flotation with a content of 800: g / m suspended substances, peptized with liquid glass, with piH 1J (4), acidified by a known method with 10 M sulfate solution to pH 7.5 at acid consumption 480 g / m. After 15 minutes from the start of coagulation, aluminum sulphate at the rate of 200 g / m is introduced into the pulp and the pulp is settled for 5 hours. As a result, the solids content in the liquid phase is 58 g / m .

Example 2. Circulating tail pulp of mica flotation containing 600 g / m of suspended substances, peptized with liquid glass, with pH 10.8, is acidified by a known method with a 10 M sulfate solution with pH 8.0 at an acid consumption of 400 g / m. Through 15 The pulp is injected with flocculant-polyacrylamide and settled for 5 hours. As a result of settling, the solid content in the liquid phase is 86 g / m.

Example 3. The circulating pulp of scheelite flotation above

According to the proposed method, the composition is acidified with gasoline alkylation residues of the composition,%: HjSO4 91, sulfur-containing organic compounds 5.2, the rest is water, at a rate of 200 g / m Hj30, to pH 8.5. After the start of coagulation, aluminum sulfate is introduced into the pulp in an amount of 180 g / m. The pulp is settled for one hour, the solid content in the clarified part is 26 g / m. After 5 hours, it decreases to 18 g / m.

Example 4. The circulating pulp of mica flotation of the composition described above is acidified with sulfuric acid residues of composition, wt. %: H 30. 91, sulfur-containing compounds 5.2, the rest is water, at the rate of 300 g / m to a pH of 8.2. After the start of coagulation, trichloric iron 150 g / m is introduced into the pulp and the pulp is settled.

In the first hour of settling, the solid content in the clarified

part is 16 g / m, after 5 hours of settling, the solid content is reduced to 10 g / m.

As follows from the above data, the use is for connection. Sulfuric acid residues of alkylation of gasolines allow to achieve high cleaning performance of circulating pulps, and also makes it possible to reduce the consumption of sulfuric acid from 400-600 to 200-300 g / m and coagulant from 200 to 150 g / m3.

Claims (1)

METHOD FOR CLEANING WASTE WATERS FROM WEIGHTED SUBSTANCES, STABILIZED WITH LIQUID GLASS, including acidification with the subsequent introduction of a coagulant, settling and separation of solid and liquid phases, characterized in that, in order to increase the degree of purification, acidification is carried out with sulfuric acid residues. with