SU1066714A1 - Liquid self-hardening mixture - Google Patents

Abstract

LIQUID SELF-TERMING MIXTURE for the manufacture of casting molds and cores, including a refractory filler, water glass, ferro-slag slag, neutralized black water and water, characterized in that, in order to increase the rate of hardening, strength and gas permeability while maintaining optimum vitality, the mixture additionally contains substance based on polyoxyethyleneglycol ethers of monoethanolamides of synthetic fatty acids fraction (synthmd-5) in the following ratio of ingredients, wt.%: 5.0-5.5 Liquid glass 4-6 Ferroch rum slag 2.5-3.0 Water Contact black 0.075-0,300 neutralized Substance based on l with: polyoxyethylene glycol ethers 1 "gonoethanolamides of synthetic fatty acids of fraction Gff) -Sy

Description

The invention relates to foundry and can be used to make foundry molds and cores.

A liquid self-hardening mixture is known, including quartz sand, a hardener, wood sand, water glass, fibers, a surfactant and water .tl5.

However, this mixture has an unstable survivability and low strength.

A self-hardening self-hardening mixture is known, including quartz sand, water glass, ferrochromic slag, water and salts of synthetic fatty acid f2j.

The disadvantages of this mixture - insufficient permeability and high work knockout.

Closest to the proposed technical essence and the achieved effect is a liquid self-hardening mixture, including quartz sand, ferrochromic slag, water glass, neutral neutral black, mylocafeet and water 3,

However, this mixture has an insufficient rate of hardening and strength, and when casting molds and rods, gas defects are possible in castings.

The aim of the invention is to increase the speed of hardening, strength and gas permeability while maintaining optimum survivability.

This goal is achieved by the fact that a liquid self-hardening mixture for the manufacture of casting molds and cores, including a refractory filler, water glass, ferrochrome slag, black neutralized contact and water, additionally contains a substance based on polyoxyethyleneglycol ethers of monoethanolamides synthetic fatty

fp - / 6 (sintamid b

acid fraction C, "- C with the following ratio of ingredients, may.%:

Liquid glass 5-5,5 Ferrochrome slag 4-6 Water2.5-3.0

Contact black neutralized 0.075-0.3 Substance based on polyoxyethyleneglycol j monoethanol esters of synthetic synthetic fatty acids C / 15 -C, (syntamide-5) 0.005-0.01

Refractory

filler 94-96 The preparation of the mixture is carried out in a batch mixer or a continuous action.

The mixture is prepared as follows.

First, dry components are loaded into the mixer (quartz peso and ferrochromic donkey) and mixed for 30-60 seconds, then the liquid glass composition consisting of liquid glass, water, black neutralized and sintamide-5 is loaded into the mixer. The subsequent stirring is carried out for 3-5 minutes, and the mixture is poured into a stubble box or onto a model.

Sintamide-5 is a non-ionic surfactant. The content of oxyethylene groups in syntamide-5 is 42%, the ash content in the form of results | 0.7%, moisture content 7%, iron content 0.005%.

Sintamide-5 is used according to Spec. 02-10.02.70 ;,

Examples of mixtures are presented in table. one

Table 1

Contact black neutralized

I Mylonaft

0.2 0.3

Physico-mechanical and technology. Compressive strength, kgf / cm

As follows from the table. 2, the mixture has good fluidity, the optimum properties are given in table. 2. Table 2

high durability

30 hardening and gas permeability. .

Claims (1)

LIQUID SELF-CURING MIXTURE for the manufacture of foundry molds and cores, including refractory filler, liquid glass, ferro Chrome slag, neutralized black contact and water, characterized in that, in order to increase hardening speed, strength and gas permeability while maintaining optimal survivability, the mixture additionally contains a substance based on polyoxyethylene glycol ethers of synthetic fatty acids of the fraction C ^, - C, _th ( syntamide-5) in the following ratio of ingred- ents, May.%: Liquid glass 5.0-5.5 Ferrochrome Slag 4-6 Water 2.5-3.0 Contact black neutralized 0,075-0,300 9 Based substance ω polyoxyethylene gly- esters monoethanolamides cz synthetic fat acid fractions ο ζ * C _u -C ^ (syntamide-5) 0.005-0.010 Refractory filler 94-96