Blast Furnace

Blast furnace technology has been the main method of producing iron for decades. A blast furnace is a round shaft with a refractory lining that is 100 to 200 feet high and has an inner diameter of 20 to 45 feet. The wall lining is usually 2 feet or more thick and contains over 2,500 tons of refractory material. Blast furnaces produce iron by exposing iron ore, iron particles and sinter to high temperatures and carbon monoxide (a reducing agent). Coke is the main fuel.

The preheated air from the hot blast furnace is also injected into the furnace through the tuyere. The tuyere surrounds the furnace at the top of the furnace, where incomplete coke combustion occurs. Burning releases a considerable amount of heat and creates very hot carbon monoxide reduction gases, reducing the amount of gas swept upward through the ingredients. Iron oxide reduction begins when the ore is in contact with the reduced gas, and it is usually carried out in stages to form metal iron with high carbon content. Iron gathers in the furnace to form a molten pool. Since there is no opportunity to repair refractories during operation, the length of blast furnace activity time mainly depends on the service life of refractories.

Lite offers complete refractory packages that are proven to maximize the service life of the furnaces. From the bottom of the furnace through the hearth and chimney, the refractory design will vary due to the conditions of use and destructive forces in each area of the furnace. Lite will work closely with you to ensure that all requirements are met, and choose the appropriate material (75% high alumina brick, 65% high alumina brick  or high strength refractory brick) used in each part of the furnace. Several alternatives are available, depending on the cooling design and activity objectives of the furnace.

Design plan and construction drawings

Design scheme: our company has a design company with first-class qualification, and the designer has 30 years of experience in kiln design. After the drawing is completed, three experts (civil engineer, construction engineer and operating engineer) will carry out the final review of the drawing to ensure that there will be no mistakes in the construction of the kiln.
Construction drawing: The dimensions of each place are marked on the construction drawing, and the name, size and quantity of the refractory used are marked. Any experienced construction worker can understand the drawings and follow the construction without any mistakes.

Evaluation and preparation of refractory materials

Rotary kiln is very common in the refractory industry. Common uses include calcined clay, high alumina bauxite, magnesia, high iron sand, magnesia chrome sand, magnesium aluminum spinel, dolomite and activated lime.
Recommended by LITE The calcined belt is lined with corundum mullite bricks, and the outer layer is light mullite brick. The top of the preheater is made of hanging bricks, and the rest is made of refractory castable. The brick type is small and the masonry is simple.

Construction procedure

According to the characteristics of the tunnel kiln, the construction procedures are as follows:

(1) underground part
Total flue, inspection tunnel and tunnel kiln foundation;
(2) Track installation
Install the kiln inner track, make a model car, and water the secondary concrete;
(3) kiln wall
The kiln wall is built up to the arch bricks, including the installation of sand sealing grooves and sand pipes;
(4) Install the fan
Cast the fan foundation and install all the gates of the fan and kiln;

Construction procedure

(5) kiln arch
Brickwork arches and some walls and dense tops above the arched bricks;
(6) Installation of kiln outer track
Installation of kiln outer track, trolley machine, return winch, kiln door, etc.;
(7) Kiln lining brick
Masonry kiln car lining brick;
(8) Inspection
Comprehensive inspection, cleaning, and preparation for delivery acceptance.

Acceptance and trial

1. Conduct a comprehensive inspection of the appearance quality of the kiln masonry to see if there is any crack, settlement or deformation phenomenon;

2. Remove the foreign matter in the air passage, the air outlet, the pedestrian hole, the sand sealing groove, the sanding pipe, the inspection well, the inspection road, and the outer wall and the brick column and the expansion joint;

Acceptance and trial

3. Whether the expansion joint is filled with insulation material, and whether the closed hole should be closed tightly;

4. Whether the sand sealing groove is added to the sand according to the regulations;

5. Whether the mechanical kiln door and the damper lift are flexible, and whether the closing is tight and airtight.

Daily production of 600 tons of activated lime rotary kiln

This series of kilns is an ideal sintering equipment of active lime in China, with high output, high activity, suitable for steelmaking. It is capable of burning oil, burning gas and burning coal. The daily output is 80 tons -600 tons, and the technology is mature and reliable. Maximum service temperature 1050-1100 degrees Celsius

Company Introduction

Henan Lite Refractory Material Co, Ltd is a forerunner in the kiln industry, is also a specialized kiln company with large-scale and the powerful technical force in China, which integrates scientific research, design, manufacture construction, installation, commissionin of thermal and technical advice. Lite now has 500 employees, among which there are 80 senior economists, senior engineers, engineers, accountants, assistant engineers and other management and technical personnel,and 72 professional technicians. It has 18 sub-sections as the Kiln Design Institute, Kiln Engineering Deparment, Construction Company, Electronic Control Company, Kiln Equipment Machinery and Project Dept etc. In the past 20 years, the company conducts the wide cooperatio and exchange with 58 domestic famous scientific research institutes and universities, and with their help it has constructed more than 2,000 different types of industrial kilns for 30 provinces, cities and autonomous regions in China. Among them there are more than 60 kilns, it absorded the advanced technology and experience of the foreign successful kilns to improve the labor intensity and the working environment to achieve the purpose of saving energy and reducing consumption. It has achieved a prominent social and economic efficiency, receiving good comment and appraisal from customers both at home and abroad.

24 hours after sale service

1.Free design proposal.

2.We can provide accessory facilities for kiln furnaces.

3.We have a professional construction team that can help you build together.

4.The warranty is 3-5 years. You can contact us whenever you have any questions.

5.From the design project construction and construction trial, we can also be responsible for the entire production line operation.