SU692668A1 - Method of producing self-hardening or heat-hardened composition for making moulds and cores - Google Patents

Description

beT coagulation of the binder with acute. lacquer, which leads to a decrease in absorption properties.

Quartz sands, spent molding sand, crushed quartzite, chamotte, zirco, new and olivine sands, and the common refractory liner and bentonite can be used as refractory filler.

As inorganic mineral substances used in the esrj OKi as bulk materials, Portland cement, additive-free, working: blending, resistant alumina and other cements of cement, gypsum cement, which is a dry cement with cement, is used with cement, cement, cement, dry cement, gypsum, which is a dry cement, cement with cement, dry cement, cement and other cement, gypsum, which is a dry gypsum with cement with a cement, a cement, a cement with a cement, a cement, a cement, a dry cement, a cement, a cement, a dry cement, a cement with a cement, a dry cement, a cement with a cement, a dry cement, a cement, a cement, a dry cement, a cement with a cement, a cement, a cement, a cement, a dry cement, a cement, a cement, a dry cement, a cement, a cement, a cement, a cement, a cement, a cement, a dry cement, a cement, a cement, a dry cement, a cement, a cement, a cement, a cement, a cement, a cement, a dry cement, a cement, a cement, a cement, a cement, a cement, and a cement will be used. 5: 0.5 to 1.0: 6.0, better than all of his vyssjo full-time gypsum with an alumina base; as well as high strength gypsum. As an organic water-soluble binder, vegetable-derived materials: sr LIQUID, sugar-free waste, is used. mash (ADD). The pH value of these materials is above 7.0. They can be used both as separate composites t6vT as well as complexly, for example: Hydrol with ADB, FAC with PRS, FIB with patocby II FAC, etc.,

if necessary, the mixture can be added with: coal, ffSfC, Pei, dextrin-, graphite, asbestos, mylbnaft, krntak t. Petrov a, sub residues (CO), ethyl silicate, urea, hydrated lime, podmilny lye, dibutyl tilatal with white spirit, keraine, CaCPj,, FeSO., Sazod, NaF, CaF, NagSiFe, Na, Cr2O7,, NaCE, NajjCO NaNOg, NaNOj.

; Said additives may be introduced either together with solids or with liquid components.

The mixtures prepared according to the proposed method have the following 5th recommended composition, weight. %: Inorganic mineral materials in bugs in with yo ohm in ide2.0 - 15.0

0Activated

alkalization of organic waters ortransitional materials of vegetable origin in liquid form 2.0 - 8.0 Refractory-. filler. Rest

With the introduction of limestone peyoobrazovateli (DS-RAS, K4NR, Petrov contact, etc.) mixtures can be psucheny in the liquid-mobile state.

After the introduction of the alkalized water-soluble organic binder with the other (dry) ingredient and the completion of the stirring process, the mixture is ready to have a pH (by stretching) between 8 and 15.

Table 1 shows the compositions of the mixtures prepared according to the proposed method (mixtures 1,2,5,6,9,11,13, 14) and the compositions of the mixtures prepared by the prototype (mixtures No. 3.4, 7.8.10 , 12.15).

Comparison of the properties of mixtures, the compositions of which are listed in Table 1, is shown in Table 2.

Thus, the method of preparation of the mixture according to the present invention allows to significantly increase the strength characteristics of the forms and rods ...

-Table.

2.0 5.0 2.0

dog

- pds dog

H) dog is a plastic self-hardening mixture, CSH is a liquid self-hardening mixture, PDS is a plastic long-lived mixture.

18,00,15 1,0 2,01,8

28.70.04 24.0 10.66.4

. The table summary one

Table 2,

20.0

1.5 24.0

692668

Continuation of table 2