What are some of the most commonly used refractory material for kiln liner?

1) Refractory bricks are made up of sintered magnesia, magnesia-carbon bricks and tapping socket bricks.

2) Unshaped refractory material includes magnesia brine, magnesia binder dry, magnesia gunning materials, tap filler and cold and heat-conductive filler.

Heavy mullite Brick: 1630-1700, including mullite, corundum Mullite and refired fused bricks. ;Silicon brick: 1630-1680, including ordinary products, hot-blast furnace silica brick, dense silica brick, silica brick and mullite brick; corundum brick: 1600-1800 degrees, including sintered corundum, fused corundum brick, corundum silicon carbide brick Etc. Magnesia bricks are available in temperatures between 1540 and 1700 degrees. This includes ordinary magnesia, magnesia Chrome bricks (direct-bonded magnesia Chrome bricks), fused magnesia Chrome bricks etc. ; dolomite bricks, zirconia bricks, graphite carbon bricks;

There are two types of refractories used in lead blast furnaces:

1.Water-jacket cooling is used to cool the bottom and walls of the lead blast furnace. This cooling can be divided into two types: vaporization cooling or water cooling. The inner wall is protected by a layer of slag hung over the surface. Only masonry, magnesia or clay brick, is used as refractory material for the siphon mouth, the slag pipe, and the slag trench.

2. Lead blast furnaces are usually half-water jackets. Four aspects can be distinguished in the application of refractory material: the upper portion of the body of the blast furnace is generally lined with bricks of clay, while the lower portion is built with magnesia and magnesia-chrome bricks. The tuyere is where the fuel is burnt and the materials are all melted. Slag and metal corrosion to the furnace lining can be very serious. Only refractory bricks can be used to maintain production. The cold plate is therefore cooled with water jackets or water and the furnace lining protected by high alumina or fused magnesium chrome bricks. The bottom and hearth of the furnace are responsible for collecting liquids and separating the lead slag. The non-working layer consists of clay bricks and the working lining consists of magnesia, chrome or chrome magnesia bricks.

Use magnesia- or magnesia-chromium-fire resistant ramming material, such as potbottoms or ship shapes to prevent lead penetration. On the outer side of the furnace, the siphon air outlet as well as the heat preservation frontbed are located. As a general rule, refractory bricks made of magnesium and magnesiachromium are used for lining. Clay brick is used for the non-working layer. The front bed for heat preservation is usually heated by electric heating. Its structure is similar to that of a small electric heater.

2. Vertical distillers are used to extract metallic Zinc from refractory Zinc concentrate. Vertical tanks, horizontal tank and electric furnaces are used to produce metallic zinc directly. Zinc can be extracted using sulfuric acid and electrolysis. The vertical tank is made up of a distillation room, combustion chamber and air duct. It is matched to the condenser, combustion chamber 41 and crude zinc rectification.

The selected refractory blocks should meet the following requirements: high thermal conductivity, high fire resistance, high load-softening temperature, high temperature structure strength. Good air tightness. The distillation chamber is usually built using silicon carbide bricks. Refractory bricks must be precisely measured. Bricklaying joints must be as small and as tight as possible. In normal conditions, special mud is used to line the entire working lining to ensure airtightness and overall stability. This will also prevent zinc vapor leakage. Clay bricks shall be used to build the outer walls of combustion chambers, air ducts and furnaces. The service life of the furnace is between 3-5 years. The crude zinc rectification oven 40 and the rectification turret 41 are divided into two towers, a cadmium and lead tower.