Smart refractory solutions

Höganäs Bjuf provides refractory solutions that perform better, last longer, and give you lower refractory cost per ton of clinker produced – especially if you are burning alternative fuels.

Here are some examples and challenges about how Höganäs Bjuf can improve the refractory lining of you cyclone system.

Large cyclone diameters

Increasingly large cyclone diameters make it difficult to keep bricks in place in the vertical sections. To meet this challenge, Höganäs Bjuf developed the CY brick, which has an interlocking profile that allows adjacent bricks to support each other.

Higher operating temperatures

Higher operating temperatures, particularly in the lower cyclones, require use of refractories with high refractoriness and high strength. With higher temperatures, corrosive vapors can penetrate higher into the cyclone system, so alkali- and chloride-resistant refractories should be used.

Build-ups

Build-ups reduce cyclone efficiency, and their removal ultimately requires a production stop. Regardless of the method used, removal is dangerous work. The best option, however, is a refractory that eliminates or minimizes build-ups, such as Denscast Sicto. In very severe problem areas, this solution can be advantageously combined with air canons.

Alkali & chloride penetration

Chemical attack – in the form of alkali penetration – is unavoidable in cement production. The worst damage occurs in lower cyclone stages and riser ducts, kiln inlets and even recliners. Alkali- and acid vapors infiltrate the refractory linings and attack the binding phase at temperatures as low as 600-700°C, thus endangering the lining.

The safest, most cost-effective method to deal with this is to reduce the amount of insulation used, in order to move the vapor’s ‘dewpoint’ outside the shell of the cyclone. If refractory and cyclone external shell temperatures remain above 100°C, ambient moisture and chemical vapors will not condense.