About Us
ZHENJIN REFRACTORIES develops, produces, and sells innovative refractory products and lining systems that are adapted to the latest types of plant and comply with environmental legislation. Modern refractory concepts for the lime industry benefit from the advantages offered by shaped and unshaped products. ZHENJIN REFRACTORIES has the expertise and the products to design and implement individual concepts at any time. From the raw materials through design and product development to application and service – including the recycling of consumed materials – we carry out the assigned tasks competently and completely customer-oriented. And of course, service before and after installation is part of our comprehensive service package.
As opposed to rotary kilns, shaft kilns are static production systems in which the raw material (limestone in various particle sizes) is fed into the kiln from the top, from where it moves downwards through the kiln shaft purely by gravity. By introducing heat energy (fuel), a chemical reaction (dissociation) takes place, whereby the limestone (CaCO3) is split up into lime (CaO) and carbon dioxide (CO2).
Although shaft kilns in different versions and sizes are used in a wide range of industries (lime, sugar, soda, iron & steel, etc.), what they have in common is that their refractory linings always consist of several layers. Usually, these consist of several insulating layers, the permanent lining, and the wear lining. Similarly, the zones in a shaft kiln can generally be divided into the preheating, calcining, and cooling zones.
As the filled shaft kiln basically represents a column of limestone that reaches up to the feeding area and is permeated by a flow of hot combustion gases, the stresses of the refractory lining are somewhat different to those in a rotary kiln. Due to the heat transition through the different refractory layers, and the specific temperature limits of the insulating materials, the insulating layer is usually built up of one to three plies. The purpose of the insulating layer is to reduce the shell temperature to a specified maximum value.
2. Lime rotary furnaces
For constructional as well as production-related reasons, the rotary kiln is subjected to a wide range of thermal, chemical, and mechanical influences.
Particularly the increasing use of alternative fuels leads to extremely high thermochemical and thermomechanical stresses in the refractory lining.
3. Products
Magnesia—alumina spinel bricks
Spalling resistant high alumina bricks
GUIMO abrasion resistant bricks
Magnesia-chrome bricks
High alumina castable
dense tissue structure
flexibility corrosion
strong peeling resistance
excellent thermal shock resistance
flexibility corrosion
high temperature stability enhance
high strength
low abrasion
You can consult online or write an email, We deal with your needs immediately
Songlou Industrial Zone, Xinmi City, Henan, China
