SU1456374A1 - Method of clarifying waste water of fluorspar production - Google Patents

Abstract

The invention relates to the field of chemical technology, in particular to the intensification of the processes of sedimentation of solid suspensions from industrial water production, can be used in enterprises operating on industrial waters, in particular in the technology of producing fluoride salts, and allows to increase the degree of clarification. In order to carry out the process, the effluent of the fluoride spat production is treated with an organic reagent-fccoculum, the product of saponification of the concentrate of bi- and polyfunctional acids of the C14-Cd-sodium hydroxide fraction or monoethanolamine, preferably in the amount of 4-80 mg / l. The residual content of suspended substances in clarified water is 2-5 mg / l. . . 1 3.p. f-ly. with S WITH

Description

one

The invention relates to chemical technology, in particular, to the intensification of processes for the deposition of solid suspensions from industrial water production, and can be used in enterprises operating in industrial waters, in particular, in technology for producing fluoride salts.

The aim of the invention is to increase the degree of clarification.

Example. In a cylinder with a capacity of 1 l, wastewater of a fluorspar production is placed with a suspended matter content of 21.0 g / l, pH 5-10, temperature 5-90 C. Then

An organic reagent is introduced into the cylinder - the product of saponification of the concentrate of bi- and polyfunctional acids of the Cs-MF fraction with sodium hydroxide or monoethanolamine in the amount of 4-80 mg / l.

These reagents are obtained by reacting a concentrate of isotope, di-, and non-saturated acids (or bi- and polyfunctional, obtained by purifying synthetic fatty acids fractions with aqueous solutions of bases, and aqueous solutions of sodium hydroxide or monoethanol amines are used as bases.

cl

05

with

one

The iso-, keto-, di-, and unsaturated acids concentrate is a mixture of acids according to the fractional composition of the following chemical composition:

Acid number,

mg KOH / H, 230-285

Essential, number,

mg KOH / G15,5-18

, Carbonyl number, mg KOH / G 21-36

Iodine number, g

JI / IOQ g25-35

Mass dol,%:

don't get em4,6-7,0

Dicarbonic

acid acids

15-19 40-43

The water with the reagent is stirred, settled, and the rate of "precipitation of particles of the solid phase and the content of suspended solids in clarified water is determined. They are 3.2–4.2 m / h and 2–5 mg / l, respectively.

In parallel, the wastewater treatment of the fluorspar production is carried out by a known method using as organic

ethoxylated polyamine additives. The content of suspended substances in clarified water is 0.3-0.5 g / l.

From the comparative data on the known and proposed methods, it follows that the latter makes it possible to reduce the content of explosive substances in clarified water from 0.3-0.5 g / l to

3-5 mg / l by using a cheaper and more affordable reagent.

Claims (2)

1. A method for clarifying sewage from a fluorine spat production by treating an organic reagent п п ок тем ул тем отлич отлич, characterized in that the product of saponification of the concentrate of bi- and polyfunctional acids of the fraction GM-CJ sodium hydroxide is used as an organic flocculant reagent wm monosolumine. 2. Method POP1, differing from the fact that the organic reagent-flocculant is introduced in the amount of 4g-80 mg / l. .