SU1440884A1 - Binder - Google Patents

Abstract

This invention relates to mineral formulations in the living and can be used in the pulping industry in the manufacture of concrete products. The purpose of the invention is to increase the strength in dilute solutions of hydrofluoric acid and reduce the cost. The i sting contains, in wt.%: Bauxite slurry 20-40, sulphite-alcohol bard 0.3-0.8, neutralized fluoro-hydrite 17-40, lime 4.7 -.9.2, alumino-gelite cement the rest. Samples have a strength after 28 days of curing 42.5-49.6 MPa, after 80 days of storage in a 5% solution of hydrofluoric acid 46-53 MPa. 2 tab. S

Description

ABOUT

sc

00 4iib

11 and 1) brilliance (given to compounds MHHepajTbHf.ix g {their) and can be used in terms of irogplivnosti in the manufacture of concrete products.

The aim of the invention is to increase the strength of dilute solutions of hydrofluoric acid and reduce the cost.

The wafer is prepared by mixing the Q components in a predetermined ratio.

Neutralized fluoride is prepared from fluorine-gypsum cryolite production waste. Fluorine waste is the following j5 mixture, wt%:

Anhydrous

Calpi sulfate 75 - 82

Concentrated

sulfuric acid 10-15 20

Sorbed fluoride

hydrogen1-13

Uncomposed

fyuorit and others. 1.38-3.9 25

In order to further use the fluorhydric waste, it is necessary to neutralize the excess amount of acids in order to obtain a component of the hydrate containing granules of 1.0 to 3.5%, depending on the amount of added additives. Before being introduced into the trencher, it is ground before passing through a P08 sieve.

The introduction of fluorine hydrite, which has abrasive properties, makes it possible to replace part of the expensive alumina-cement and to increase the strength of the cement.

The lime injected into the hammer interacts with the sulfuric acid remaining in the fluorine hydrate and is a hardening catalyst, which results in a shorter setting time.

The compositions in the field and its properties in comparison with the prototype are given in table. 1 and 2,

As can be seen from table 2, the samples from the binder according to the invention have a higher corrosion resistance.

Formula- and inventions

In the ground, including alumino-earthy cement, bauxite sludge and sulphite-spirits bard, this is due to the fact that, in order to increase the

mainly of anhydrous sul-30 ™ strength in dilute calcium solution (anhydrite. For Pax hydrofluoric acid and

ihydrite containing granules 1.0 - 3.5% depending on the amount of additives added. Before being introduced into the trencher, it is ground before passing through a P08 sieve.

The introduction of fluorine hydrite, which has abrasive properties, makes it possible to replace part of the expensive alumina-cement and to increase the strength of the cement.

The lime injected into the hammer interacts with the sulfuric acid remaining in the fluorine hydrate and is a hardening catalyst, which results in a shorter setting time.

The compositions in the field and its properties in comparison with the prototype are given in table. 1 and 2,

As can be seen from table 2, the samples from the binder according to the invention have a higher corrosion resistance.

Formula- and inventions

In the ground, including alumino-earthy cement, bauxite sludge and sulphite-spirits bard, this is due to the fact that, in order to increase the

This fluorinated waste is loaded into the repulpator and dispersed with a working solution for 15 minutes. The pulp from F: T - 1: 3 is supplied to thicken up to - 18.1 - 19.0 kN / m at 60 - 90 ° C; 2 hours and is fed to a neutralizer. Various additives (limestone, marble-Q dust, red flame) are used to neutralize the acid gc-tt and the sigarpag pulp. Mixed mass fsh11-tru | 1t at t 60 ° С until the moisture content of the cake HP exceeds 20-21%, then granuli rush and soup t. Acidity

cost, it additionally contains neutralized fluoride - waste cryoline production, and lime in the following ratio of components, wt.%:

Bauxite slime 20 - 40 Sulfite-alcohol bard 0.3-0.8 Neutralized fluoride 17 - 40 Lime-4,7 - 9,2

Aluminum cement Cement

14408RA

Table 1

KoNmoHp-HTbiStructure, wt.%

Proposed Prototype

.-... l..J.-L LTl-L-LAl yumo ate 3 and with th

cement25 50 65 20 36 50

Bauxite slime 74.5 49.2 34.7 30 40 20

Sulfite-alcohol

bard0.8 0.8, 3 0.8 0.5 0.3

Neutralized

fluoroanhydrite - - - 40 17 25

Lime --- 9,26,5 4,7

..Table 2

Co-Strength, MPa, after

tawa

28 days. Exposure in 5% of 28 days. Exposure in 5% rastnormal-solution of NR, sunormally-thief HF, days

HIM

hardness- 30 60 80 hardness- 30 60 80 neither

Prototype-Hosted

138.5 38.0 36.2 30.6 -42.5 42.3 43.6 46.0

246.5 47.0 44.2. 38.7 49.6 49.5 52.0 53.0 3- 41.5 40.6 39.6 32.8 46.8 45.4 46.4 48.0

Compiled by V. Bolshov Editor T. Lazorenko Tehred A. Kravchuk Proofreader S.

Order 6140/27 Circulation 594Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. - - I g P-4- -MP ig | - - T- ..

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Formulas - and inventions 25 A binder, including aluminum-iron cement, bauxite sludge and sulphite-alcohol stillage, characterized in that, in order to increase the strength in dilute solutions of hydrofluoric acid and reduce cost, it additionally contains neutralized fluorohydride waste cryoline production, and lime in the following ratio of components, wt. %: Bauxite sludge 20 - 40 Sulphite spir- merchandise barda 0.3 - 0.8 Neutralized fluorohydride 17-40 Lime 4.7 - 9.2 Aluminiferous cement Rest