Complex modifying additive for production of construction ceramic products from low-plastic clays. RU patent 2518614.

FIELD: construction.

SUBSTANCE: complex modifying additive for production of construction ceramic products from low-plastic clays comprises a mixture from an organic plasticiser of clayey raw materials and a water-retaining cellulose-containing additive at the ratio of 1:(0.05±0.01) accordingly, at the same time the mix contains a plasticiser from the group of polymethylene naphthalenesulfonate.

EFFECT: reduced costs for fuel and energy resources.

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The invention relates to the production of building ceramics and can be used in the manufacture of a brick, ceramic stones, tiles by a method of plastic forming of viscoplastic and omaranabradley clays with high career humidity.

It is known that the humidity of the charge used for the production of building ceramics plastic molding method should not exceed 18-20%. Since the main component of the charge - clay may have humidity in the range of 22-30%of the required techniques and/or substances that link it to excessive moisture. For these purposes traditionally use dried clay and lime - as water-retaining additives. While drying clay requires coolant flow, in addition, operation of the drying cylinder is labor-intensive and energy-intensive redistribution of production of ceramic products. Application of lime leads to belousovova plaque in the finished product, which is unacceptable for the front of building products. In addition, in the process of burning of ceramic products possible carbonization of calcium, which leads to "dutikov" and loss of strength of finished products. Thus, reduce the moisture content of the clay raw materials reach the drying drums with the use of fuel and energy resources, either through the use of lime with its inherent shortcomings are evident in the finished product.

The present invention is saving fuel and energy resources by eliminating redistribution drying of raw materials before forming ceramic products, as well as the exclusion of the shortcomings of products from clay with a career high humidity due to the use of lime. To solve the set tasks developed a comprehensive modifying additive, containing a mixture of organic plasticizer clay raw materials and water retention cellulose additive in the ratio 1:0,05±0.01 respectively, the mixture contains plasticizer from the group polyethyleneglycoladipinate.

Improving the quality of the clay raw materials through the introduction of modifying additives at the stage of its preparation, mixing with other components of the charge is a new direction in the production of building ceramics. Related to polyethyleneglycoladipinate additives of series "LITOPLAST M", known as thinners raw sludge in the production of Portland cement clinker for cement, began to apply at plastic moulding bricks (Svirkova, Ovewrcome, Everlovin "Construction materials, may 2012, p.32-33, 90-92) [1]. However, as follows from [1], additives "LITOPLAST M" is used as thinners clay raw materials, and information that the introduction of clay furnace additives LITOPLAST 5M in the amount of 0.3% leads to decrease molding humidity mass on 4% while maintaining plasticity (14) is not confirmed by industrial tests Hrabovska brick factory. Humidity obtained from this mass of timber amounted to 18-19%, which implies that the test clay had low, in the range of 21%, career humidity. It is also established that depending on the plasticity of used clay additives series LITOPLAST M enter in the quantity of 0,1-0,5% of the mass batch. This is due to the terms of ease of introduction of the additive in the clay raw materials, since in the conditions of large-tonnage production of ceramic products, the introduction of small quantities of additives in calculation, for example, per ton of clay-containing mixture, is a technological issue, not having decided that, to achieve a high quality additive interaction with clay difficult.

The claimed invention is a comprehensive Supplement in the form of a mixture where the main component that holds the clay excessive moisture, is a cellulose additive. Organic plasticizer, selected from the class polyethyleneglycoladipinate, increasing a plasticity of the clay raw materials, is both a diluent cellulose-containing additives. A mixture of organic softener and water retention cellulose additive in the ratio 1:0,05±0.01 respectively reduces the relative molding humidity clay substance by proceeding in the preparation of the clay of physical-chemical processes, thus restoring properties of complex modifying additives ensure the coherence of the ceramic material. Declared the complex allows reducing career humidity clay raw materials for a value of 5 to 7%. The ratio of plasticizer to water retention Supplement 1:0,05=1=0,01 determined experimentally and following reason. When injected into the clay with high humidity modifying additives that have a ratio of plasticizer to water retention addition of less than 1:0,04, excessive water contact will not. In this situation it is necessary to increase the number of input modifying additives that is economically inexpedient. With the introduction of clay modifying additives that have a ratio of plasticizer to water retention addition of more than 1:0,06, there is a possibility of drying of clay that will lead to increase of water consumption in the manufacturing process and increased wear of molding equipment.

Declared additive can be introduced in quantity from 0,1 to 0,4% by weight of the mixture, facilitating the formation of the manufactured products, contributing to the more dense packing of particles in moulding mass, increase the mechanical strength of semifinished and finished products, and reduction of open porosity and water absorption, despite the fact that the declared Supplement meets technology of its introduction. New technical result achieved when using the claimed invention consists in that in the process of preparation of the clay raw materials complex reduced his career humidity and improved ductility provided technology of introduction of modifying additives.

For preparation of complex modifying additives as organic plasticizer clay used a thinner raw sludge in the production of Portland cement clinker for cement of mark "LITOPLAST M" on THE other 5743-047-58042865-2009 and Superplasticizer C-3 on THE other 6-36-0204229-625. As water retention cellulose-containing additives used hypromellose brand RUTOCEL 55RT (receiver array) LLC "Bang and Bonsomer" (www.bangbonsomer.com), and polyacrylamide brand Agocel S-2000 to The International Community for Dryimix Mortar (www.dryimix.info/industry-directory/polyacrylamide). For sample preparation of clay with a number of plasticity GOST 9169-75 to 15 were used:

- Krasnodar clay, the number of plasticity - 6-7, career humidity - 23-25%, production of LLC "Krasnodar brick plant", Krasnodar; - batch "Lake", containing clay - 60%, nagling - 40%, the number of plasticity - 9-11, career humidity - 25-30%, produced by PJSC "SBK" Sonera Kiev region

Modifying additive prepared in the laboratory. 100 g of dry plasticizer added 5 g dry water-retaining additives with a constant mechanical stirring within 5-10 minutes. Samples for tests was formed in the size 50 x 50 x 50 of clay source composition: without modifying additives and with the addition of 0.3% prepared modifying additives. After drying the samples were annealed at temperatures of 1000 C and tested on: compressive resistance, water absorption, porosity. As shown in table results of comparative tests of clay samples with addition and without it, it is revealed that the input of complex modifying agents using a mixture of organic plasticizer clay raw materials and water retention cellulose additive reduces water absorption samples, porosity of 1% to 2%, increases mechanical strength from 10% to 50%. Introduction declared modifying additives allows to produce plastic molding of viscoplastic and omaranabradley clays with high career humidity, products complying with GOST 530-2007. Similar data were obtained in the testing of samples at a ratio softener and water-retaining additives 1:0.04 and 1:0,06 respectively.

Thus, the use of complex modifying additives in the production technology of construction ceramics eliminates the redistribution of drying of raw materials before forming, saving fuel and energy resources, and to eliminate the defects of products from clay with a career high humidity due to the use of lime.

Comprehensive modifying additive for manufacture of building ceramics from maloplastichnyj clay

Name clay

Type of additive

Water absorption, %

Porosity, %

Breaking load, kgf

Ultimate compressive strength, kgf/cm 2

The Charge Of "Lake"

The Charge Of "Lake"

C-3+Agocel S-2000

The Charge Of "Lake"

"LITOPLAST M + Agocel S-2000

The Charge Of "Lake"

C-3+400 Rutocel

The Charge Of "Lake"

"LITOPLAST M + 400 Rutocel

Krasnodar clay

Krasnodar clay

C-3+Agocel S-2000

Krasnodar clay

"LITOPLAST M + Agocel S-2000

Krasnodar clay

C-3+400 Rutocel

Krasnodar clay

"LITOPLAST M + 400 Rutocel

Comprehensive modifying additive for manufacture of building ceramics from maloplastichnyj clays containing a mixture of organic plasticizer clay raw materials and water retention cellulose additive in the ratio of 1:(0,05±0,01), respectively, with the mixture contains plasticizer from the group polyethyleneglycoladipinate.