DE3204233A1 - Process for the firing of clay roof tiles - Google Patents

Abstract

In the process according to the main patent application, plate-shaped ceramic blanks, preferably clay roof tiles, are fired in refractory cassettes. The firing takes place with solid fuel, which is arranged between the cassette floors and the goods to be fired. In the new process, it is proposed to arrange an excess of fuel, exceeding the heat requirement of the respective cassette, in the cassette and to fire at least one further ceramic product also, in the same kiln, with the excess fuel.

Description

Method of firing Tondac bricks

subsequent

changed

The registration refers to the burning of @ondachziegeln as well plate-shaped ceramic objects in refractory stove cassettes by applying of solid fuel on the cassette floors as in patent application no. 31 O9 1q66 suggested. However, there is also a need for other ceramic materials Material that does not require the use of a sas3ette (e.g. brick, clinker, stoneware pipes etc.) can also be burned with coal or solid fuel.

According to the state of the art, the burning of such products is in cleanly so far unsatisfactorily solved in the particular tunnel kilns of Oil and gas can be converted to coal-fired. Here the material to be fired and the Furnace systems are contaminated with ash, resulting in major disadvantages. A mission There is hardly any ash-rich coal and solid fuels under the given circumstances perform The object of the invention is therefore to specify a method in the case of brick and stoneware products largely with solid fuel, e.g. also Ash-rich coal can be burned in a clean manner. As a further task According to the invention, the new process should also allow an excess in the oven to generate heat and to use it outside the oven, e.g. for drying purposes or Electric power generation.

The invention also aims to emit dust from the exhaust gas flow of the furnace to be kept low compared to the now heated with fine or dust coal Ovens. This is done by using unground nut or coarse charcoal on the one hand achieved and on the other hand due to the good shielding of this carbon or Ash residues in the stove cassette from the furnace gas flow. Thus a whirlwind and Entrainment of dust particles is essentially very low, which means expensive dust removal systems usually become superfluous on the furnace system.

To solve the problem is from the use of cassette for burning started from roof tiles or other plate-shaped ceramic products according to patent application no. 31 09 146.6 which are essentially on their edges are arranged in the stove cassettes and thus a good vertical heating gas discharge from the bottom of the cassette.

The tests with the method according to the main application have shown that it is possible to use the entire combustion heat as solid fuel between the overlying cassette base and usable trimmings in the cassettes before firing to store.

According to the invention, an excess of solid fuel is proposed to store in the cassette floors opposite their thermal heat requirements, so that others non-fuel-containing cassettes can be burned with their contents. Further Uncassetted products such as brick, roof tiles or stoneware pipes can also be used burned in the furnace according to this proposal in a clean manner without the effect of ash will.

The invention makes the use of ash richer, also of inferior quality Solid fuels possible. But it also sets no accents in the planning of such Plants because there is a strict separation of production lines for different products is no longer necessary as previously aimed. The innovation will also the independent generation of electricity from excess energy from the furnace system advantageous.

The cassette bottoms form a large stove area which despite the Burning excess fuel only results in a low load on the hearth. For firing a cassette filling with e.g. 50 kg firing material, approx.

2000 EF / kg fired good 100,000 KJ of fuel filling on the hearth cassette base required, for which approx. 7 kg of ash-rich lignite are sufficient. One fills the cassette but with 14 kg of lignite you can use the same amount of unassembled fuel of a second kind in the oven.

Claims (1)

A N S P R Ü C H E Claim 1 method for burning clay roof tiles and other plate-shaped firing material which is vertically on its edges in refractory (e.g. U-shaped) cassettes are set and stacked for burning are characterized in that at least a part of the in an oven Cassettes more solid fuel between the cassette bottoms and before the firing process the material to be burned is stored as fuel for burning in the respective The material to be burned in cassettes is required for the burning process and with the excess heat with at least a second brick or ceramic product in the The same oven is burnt in a cassette or not in a cassette. Claim 2 The method according to claim 1, characterized in that the Excess heat developed from the excess fuel in the oil is burnt outside the furnace will. -2- page to claims claim 3 method according to claim 1 and 2 characterized in that the fuel fillings are preferably on the cassette bottoms consists of coarse-grained fuel of one or more components and these be distributed qualitatively programmed in the furnace cross-section.