DD158028A1 - PROCESS FOR PRODUCING CERAMIC MASS AND PRODUCTS - Google Patents

Abstract

The invention relates to the production of preferably heavy clay products, such as bricks and clinker. It is an object of the invention to increase the ability of the water to diffuse during drying, to compensate for the reduced Kolloidalcharakter by the leaning, to accelerate the silicating process and thus a Mullitausbildung and to deepen the redness of the product. The invention is characterized in that power plant filter ash with a volume fraction of more than 3% and red Schlaemme or Eisenschlaemme mixed with an amount of more than 0.2% by mass with the matrix and then subjected to a common further processing. According to a variant of the inventive solution of the described mass is added as a further component sand with a volume fraction of 3 to 25%.

Description

-A-

Title of the invention

Process for producing ceramic masses and products

Area of application of the invention

The invention is preferably for the production of heavy clay products, such as bricks, clinker; Cable hoods, sewer stoneware, expanded clay products. wherein the main component of the ceramic mass and the plasticizer form clays or clays applicable.

the known technical solutions

According to the solution described in WP 122814, it is known that, in order to influence the surface activity of the clay particles, the total capillarity, the diffusion capacity, the water content and / or the silicatization, additives are introduced into ceramic masses or raw materials during the firing process AS 1S71229 is known to use raw sludge as the basic mass and to add fly ash to this basic mass for the production of lightweight aggregates »

Object of the invention

It is the aim of the invention; to increase the overall capillarity of the unfired material and the diffusivity of the water and to positively influence the colloidal character of the material and its binding capacity in a processing-related sense by means of suitable additions in a certain amount. "

Presentation of the essence of the invention

The object of the invention is to be achieved by a certain combination of several additives. "As aggregates for the ceramic mass or the ceramic raw material, industrial waste products from coal-fired power generation plants and materials containing iron oxide or * iron hydroxide are used. The waste products of energy production plants are © known as filtering ash The strong iron oxides or "eisenhydroxidhaltigen waste products is it's red mud or iron sludges, the use of waste products of aluminum production, which are often referred to as Lautamasse or Bayer composition preferably j comes into consideration"

Both of the required Abprodukttypen should be introduced as required together or in admixture with other aggregates in the coarse ceramic materials as offset components, wherein the power plant filter ash in proportions> 3% by mass and the iron oxide or * iron hydrous materials in proportions "> 0.2 mass ~% of the total mass is used and the proportion of the sum of all waste products used should be> -5% by mass.

With regard to the influencing factors of the aggregates, the parameters of the overall

during processing the grading ranges present in the by-products, the energy sources adhering to the power plant ashes in the form of unburned constituents, and the colloidal and flux character of the waste iron oxide-containing hydroxides. "

By their interaction to multiple functions of the introduced in a mass Industrieabprodukte arise in such a way that the filtering ash the Gesamtkapillarität of the material and increases the diffusivity of water and has a positive effect during the firing process on the silica coating of the ceramic body by an increased mullite, and in that iron oxide / hydroxide-containing additives have a stabilizing effect on the Kolloidalcharakter and thus exert the binding capacity of the material and in the silicization of the ceramic cullet favors mullite formation and staining.

The described effects on the behavior of the masses and products can usually be achieved by offsetting the mass with the industrial wastes of the mentioned types. However, it is also possible, if appropriate, to use a plurality of by-products of a similar type or of additional different types, it being necessary for at least two of the additives used to be waste products of the aforementioned types.

The invention will be explained in more detail below by Ausführungsbeiispielen:

I * A klinkertori of chemical composition

^Fe 2 ° 3 MgO

7.83 % 3.55 % 0.80%

62 , 39 % Al ₂ O 22 30 % 1 , 62 % CaO 0 , 36 % O , 18 '% κ.ο 1 70 %

is 38 vol% _e a lignite fly ash of the chemical composition

GV 3.20% SiO ₂ 49.90% ^A1 2 ° 3 28.50 ^Fe 2 ° 3 7.00 % TiO ₂ 1.30 % CaO 4.20 MgO 2.00 % Na ₂ O 0.10 % ^K 2 ° 0.70 ^S0 3 3.30 %

and 5 % by volume of Lautamasse and processed in a clinker brickwork.

The product has the following parameters;

Tile Density: Shard Density: Compressive Strength: Frost Resistance: Ausflühungstufe; Water absorption: Color: Product quality:

Dry breakage rate:

1.48 kg / dm * 1.91 kg / dm 53.1 N / mm ²

9.8 %

maroon

Klinker VK .and Kkv standard

Energy reduction in the firing process: 15 %

2 »Klinkerton according to Example 1 with 35 volume"% of a lignite fly ash in accordance with Example l and 5 vol.% And 12 vol Lautamasse _e offset Magerungssand% and processed under the conditions of the technological heavy clay industry around at 1200 C burned

The broken piece has the following parameters

Bending strength: 17 .5 2 N / mm body density: 2 , 04 g / cm Water absorption: 9 2 o / h Ausblühneigungsstufe: 1 Frost resistance: j a Colour: . maroon

3. A bricklength of chemical composition

GV 4 1 Q ⁰ A SiO ₂ 72 , 83 % ^A1 2 ° 3 12 , 74 ^Fe 2 ° 3 4 , OD / o TiO ₂ 1 »07% CaO 0 80 MgO 0 QD ° / Na ₂ O 0 , 20 % K ₂ O 2 20

".'ird with 30 vol. % of a hard coal filter ash of chemical composition

GV 4.5 % SiO ₂ 49.2 % Al ₂ O ₃ 28 , 7 ^Fe 2 ° 3 / , O / yy TiO ₂ η.b _e CaO 3 ,8th MgO 2 1% Na ₂ O 0.8 % K ₂ O 2 , 0 SO ₀ η o c /

and mixed with 4 % by volume and processed under the technological conditions of the heavy clay industry and fired at 1100 ° C.

The broken piece has the following parameters:

Bending strength: 14.3 N / mm Shards of raw density: 1.85 kg / dm ³ Water absorption: 16.2 % Ausblühneigungsstufe: 1 Frost resistance: Yes Colour; maroon

Claims (2)

. ' - s ~ ο ο ο Erfindunqsansprüche , ", Process for the production of ceramic masses and product whereby for the production of the working masses clays or clays are mixed with two different industrial wastes and subjected to a common processing; characterized in that power plant filter ash in proportions greater than 3 vol «. % _G preferably 20-70 VoI _6% and red muds in proportions of more than 0, 2 voie%, preferably 2-8% by volume * mixed with the ceramic raw material and then 'seed of a common "processing undergo" 2, method according to item Ij, characterized in that using a mass according to point l as a further component, sand is used with a volume fraction of 3 to 25 % »