Tunnel sintering kiln

1.Kiln Body Structure

The total length of this kiln is 68m, divided into 34 standard units, and the unit length is 2m/section. According to material, temperature and process flow, it is divided into preheating zone, firing zone and cooling zone. The kiln body is made of metal frame and refractory insulation material masonry through strict craftsmanship. The metal frame is an assembled unit structure, which is welded and drawn by high-quality steel; the surface of the kiln body is inlaid with painted decorative steel plates, which is beautiful and elegant; each unit is connected by bolts.

The masonry part of the kiln wall is built with high-grade lightweight refractory insulation materials. The lining body below 1000°C is made of high-quality light materials such as light-weight high-alumina and poly-light-high-alumina, and the lining in the temperature zone above 1000°C uses light mullite bricks; the kiln exterior wall masonry uses aluminum silicate wool according to different temperatures. Board and felt insulation, not only good thermal insulation, energy saving, but also long service life. A 20mm expansion joint is reserved between each unit masonry and filled with high-aluminum fiber blanket.

The kiln adopts a flat ceiling structure, and the ceiling height is set in different sections, which can not only meet the safe operation of the products, but also reduce the temperature difference between the upper and lower sides. At the same time, this structure is also convenient for the adjustment of various systems in the kiln. There is a sand seal structure between the kiln wall and the kiln car, and a pair of sand hoppers are installed along the length of the kiln. The steel frame of the kiln car is provided with a 5mm thick sand-sealing steel plate. The sand-sealing groove is a “U”-shaped structure.

2. Kiln Car Operation System

The frame of the kiln car is welded by section steel, the wheels are made of cast steel, the axles are made of 45# steel, and the bearings are made of special high-temperature clearance bearings for kilns. The bearing is resistant to high temperature, has a long service life, and does not need to be filled with any lubricating oil.

In order to reduce the heat storage of the kiln car and save energy consumption, the masonry of the kiln car adopts a brick-wool mixed structure. The high-temperature lightweight thermal insulation bricks around the kiln car are made of high-temperature adhesive, the middle part is filled with high-temperature refractory fiber cotton, and the surface layer is covered with cordierite-mullite cover. Phenomenon. The curved seal between the steel frame of the kiln car and the steel frame is sealed by asbestos rope.

According to the process requirements, in addition to setting up the inner lane of the kiln, one return lane and two ferry lanes are also set up. The whole kiln is equipped with automatic hydraulic propeller and manual in and out kiln car system. The outer carriage return line is manually pushed and pulled back, and there are artificial push and pull shuttles on the ferry tunnel.

3. Combustion System

The control mode of the combustion system of the whole kiln is the proportional control of the actuator, and the combustion-supporting air adopts the hot air of the tail-cooling heat exchanger as the combustion-supporting air.

Burner product features:

a. Adopt the current market energy-saving products;

b. Complete combustion and high combustion efficiency;

c. It can achieve high-intensity combustion, and the volumetric heat intensity can reach 1.2×104kcal/m3

d. High speed, long range, stable flame, no coking, no clogging.

e. The combustion is sufficient, no black smoke is emitted, and there are few pollutants in the combustion products, which are lower than the national environmental protection indicators.

Can Be Customized