RU2087441C1 - Fusing agent - Google Patents

Abstract

FIELD: building industry. SUBSTANCE: fusing agent containing frit prepared from a mixture of quartz sand, soda ash and slag has additionally borax. Frit is prepared from the mixture that contains, wt.-%: quartz sand 19-36; soda ash 31-42; cupola slag 22-50. Fusing agent has the following components, wt.-%: borax 2-5, and the indicated frit - the rest. EFFECT: improved quality and properties of agent. 3 tbl

Description

 The invention relates to the production of building materials.

 A known composition for the manufacture of artificial stones, including ground granular slag, soda melt, blast furnace slurry in the following ratio of components, wt.

Ground granulated slag 42-66
Soda melt 4-8
Blast furnace slurry 30-50
The reasons that impede the achievement of the required technical result is that the steaming temperature of the finished products 95 ^o C provides only a chemical hardening process, as a result of which the oxides that are part of the ground granulated slag, blast furnace sludge, such as Fe ₂ O ₃ , MnO, MgO , Al ₂ O ₃ , FeO are not involved in the hardening process, which reduces the strength and water absorption of products.

 Known binder containing dust entrainment of lime kilns, burnt spent molding sand foundry, cupola granules "hump" waste production of aerated concrete products in the following ratio of components, wt.

44-43 Calcined Waste Foundry Mix
Cupola grashlak 14-18
"Pink" ablation of lime kilns
The disadvantage when using the specified binder is that to obtain the necessary strength of the products requires autoclaving.

 Closest to the invention in composition is fluff for the manufacture of ceramic products, including silica sand, soda ash, phosphorus slag in the following ratio, wt.

Sand quartz 15-30
Soda ash 30-35
Phosphorus slag 35-65
The disadvantage of flooding is high water absorption, high temperature, long firing time of products, low strength characteristics of the products obtained. The technology for the production of ceramic products using the described melt to reduce water absorption requires surface glazing, which greatly complicates the process and requires double high-temperature firing of products. Low strength characteristics of products in this case are associated with insufficient firing temperature.

The objective of the invention is to obtain flux for the production of building materials and artificial stones based on SiO ₂ having physical and mechanical properties close to natural materials.

 The technical result of the invention is to reduce water absorption, temperature and firing time of products and increase their mechanical strength.

 The specified technical result is achieved in that the melt, including the frit obtained from a mixture of silica sand, soda ash and slag, additionally contains borax, and the frit is obtained from a mixture containing, by weight.

Quartz sand 19-36
Soda ash 31-42
Cupola slag 22-50
in the following ratio of components, wt.

Borax 2-5
Indicated frit rest
The novelty of the invention is the introduction to the composition of flume cupola slag in the amount of 22-50 wt. and borax 2-5 wt. Cations contained in cupola slag with an average field strength (FeO type) increase the flexibility of the glassy framework that forms after firing, which reduces the likelihood of cracks in the finished products. And contained in the slag Al ₂ O ₃ is a glass former.

When the ratio of Na ₂ O / CaO at level 1, which is created by content smoothly in the proposed percentage of calcined soda and cupola slag, provides a high relative bond strength in the glassy frame. The presence of MgO and MnO in the slag increases the strength of the melt.

 Borax lowers the firing temperature of products and increases the wetting ability of the melt. If the borax in the mixture contains less than 2 wt. then the wetting ability decreases sharply (2-3 times). If borax contains more than 5 wt. the viscosity of the flux decreases and the glassy framework in the finished product is not formed.

 If cupola slag in the mixture contains less than 22 wt. This reduces the number of oxides involved in the formation of the glassy skeleton in the finished product, which leads to a decrease in the strength properties of the silicate product. Excess cupola slag, more than 50 wt. leads to a decrease in the viscosity of flux, which degrades the strength properties.

The melting is prepared according to the following technology: quartz sand (SiO ₂ content _of not less than 95%), soda ash (Na ₂ O 58%), cupola slag of foundry production is crushed, sieved, dosed, fritted at 1450-1500 ^o C and granulated in water. The resulting granulate is crushed and added to the borax.

 The composition of the frit is given in table 1, the composition of the melt is given in table 2.

 Example.

 Based on the compositions of fusion indicated in Table 2, samples of tiles 150 x 150 x 10 mm in size of the following composition were prepared, wt.

Ground quartz sand (0.1 mm fraction) 60
Annealed foundry molding sand (SiO ₂ content _of at least 95%) 20
Melon 20
To ensure crude strength, 20% aqueous solution of water glass is added to the prepared mixture in an amount of 5% in excess of 100% of the mixture. The resulting mixture was pressed at a specific pressure of 25 MPa. After pressing, the products were dried at a temperature of 100 ^° C and calcined at a temperature of 850 ^° C for 30 minutes.

Indicators of physical and mechanical properties of the samples are given in table.3
According to the data given in table 3, tiles from a mixture based on the proposed melt have better properties compared to the prototype.

Claims (1)

 A melt comprising a frit obtained from a mixture of silica sand, soda ash and slag, characterized in that it additionally contains borax, and the frit is obtained from a mixture containing, by weight. Quartz sand 19 36
Soda ash 31 42
Cupola slag 22 50
in the following ratio of components, wt. Borax 2 5
Indicated Frit

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