CS220275B1 - Composition for manufacturing products from burnt brickmaker's shatter - Google Patents

Abstract

Adding piopolice dio production blends which contain combustible substances will allow them burnout without damaging the product and without special adjustments to the burning aggregate and the technologist burning.

Description

The invention relates to: brick products suitable for building structures! and other works using cullet products.

Brick products are produced by shaping brick materials, drying and firing them.

One of the most important properties of brick products along with strength is the bulk density of the shard. The volume of the weight is directly proportional to the thermal conductivity of the brick material and the size of the heat loss by the peripheral structures of the brick products formed.

It is an effort to reduce the bulk density of the bricks by producing holes, but also by selecting or modifying the product mixtures containing the combustible substances that burn with, and reduces the bulk density of the shards and hence the article.

The problem is non-burnout in the solids of pressed organic substances. Also, in the case of burning, rapidly evaporating organic substances, which do not have enough diffuse paths from the drying, are also damaged in the drying process. Defects are caused by the small permeability of the gas outlet on the bottom or: out.

More often, there is a defect of black cores, which in many cases prevents the use of raw materials with a higher content of fossil solid fuel or add it to brick clay in the term of coal or clinker.

The problem is usually solved by adjusting the firing mode, mainly by increasing the firing time with stamina at appropriate temperatures, while creating a strong oxidative burning atmosphere. Both methods have a negative impact on the fuel consumption of the firing and on the performance of the furnace unit and can only be fired with lumps of less pressed fossil fuels.

The above-mentioned drawbacks are eliminated when used in a production mixture containing up to 20 wt. 10 to 60% by volume of finely divided porous additives with the advantageous fly ash produced by the pulverized coal combustion.

The fine-grained ingredients (ash) by their granuldmetry and porosity dispersed in the production medium mean that the lining will already be porous and thus gas-permeable on both sides. Toi, during firing, facilitates oxygen access from an oikolite atmosphere to solid fuel particles in the dryer, oxidizing it, and leaving the combustion gases.

The addition of popočky to refractory mixtures for the production of bricks is known worldwide and in our country.

They are added to brick raw materials for the purpose of sharpening raw materials or to try to utilize the residual heat content and also to lighten the brick shard.

It is not known to use ash as an agent to burn brick solids with a higher solid fuel content. I

The production mixtures containing organic substances according to the invention may comprise: solid fossil fuels (all types of coal), wood, otherwise solid plant substances.

Examples of use of production mixtures

Solid brick made of a kind of plastic) achieves a compressive strength of 20 MPa at a bulk weight of 1850 kg. m ^-5 at firing time 72 hours

Ked 'do. 15% of low-calorie brown coal blend, increase the firing time to 80 hours. and we get bricks with a strength of 15 MPa with a density of 1710 kg. m ^-5 .

By adjusting the production mixture to contain 65% clay, 15% dust: lignite and 20 percent fly ash or ground pulp, the burning time is reduced to 74 hours to give bricks with a strength of 15 MPa and a density of 1590 kg. m ~ ³ .

If we use a raw material that contains 17% of the combustible content of organic matter in the amount of combustible material, we obtain a solid brick with a strength of 15 MPa and a density of 1580 kg. m ^-3 , but the required firing time is up to 100 hours. >

After adjusting the production mixture to contain 75% * of said raw material and 25% fly ash or sludge from brown coal scrubbing, we obtain 20 MPa strength products with a bulk density of 1520 kg. m ~ ³ , and it is only 72 hours to burn them.

If the production mixture contains other organic substances, e.g. wood (sawdust), straw, corn husks, wood peel, wastes from polyethylene and other polymeric organic substances (polypropylene, polystyrene) will contribute to the permeability of the drier in a similar way as in the examples, fine grain porous additives, except sludge from washing of brown coal, finely ground brick pulp, ground slag, sewage sludge and others.

Claims (1)

SUBJECT Mixture for the manufacture of bricks of baked clay by plastic production as well as dry and semi-dry cutting, characterized in that it contains up to 20 wt. 10 to 60 percent by volume of the fine-grained porous additives, preferably the flakes produced by the pulverized coal combustion.