Construction spraying method of refractory spray coating

 

The spraying methods of refractory spray coatings are divided into three types: wet method, dry method and flame method.

1.Wet spraying refers to the spray surface of refractory spray coating after adding water or liquid binder. Wet spraying is divided into four types: mud method, wet method, semi-dry method and pseudo-dry method. The mud method is to mix the refractory mixture into a slurry before spraying, and is mainly used for thermal gunning of furnace lining; the wet method is to stir the refractory mixture into pumping mud and then spray; the semi-dry method is to add the refractory mixture first A small amount of water is stirred evenly. When it is delivered to the nozzle, the remaining water is added and then sprayed; the false dry method is to stir the refractory mixture evenly through a mixer, and then send it to the nozzle to add water for spraying.
2. Dry spraying means to spray the mixed refractory spray coating directly to the sprayed surface through the jet nozzle, which is mainly used to repair the furnace.

3. The flame spraying method is that the mixed refractory spray paint is transported to the nozzle by the high-speed flow of oxygen in the pipeline, and then sprayed together with the combustible gas. The material advances during combustion and is sprayed onto the sprayed surface in a molten state. This method is mainly used to repair the furnace lining by thermal spraying, without damage to the original furnace lining, the spray coating is easy to be sintered, and has a long service life.

Article Source:Construction spraying method of refractory spray coating

Company name ：Luoyang Wanhao New Material Co., Ltd.

More Refractory Products: http://www.wanhaorefractory.com/en/product.html

Website: http://www.wanhaorefractory.com/


 


评论

发表评论

此博客中的热门博文

Advantages and disadvantages of fire clay brick

图片
According to production process, fire clay brick is divided into machine made brick and handmade brick. According to structures, fire clay brick is divided into solid brick and hollow brick, and hollow brick can be divided into load-bearing brick and nonbearing brick. Fire clay brick is made at different shapes according to different using requirements. Advantages of fire clay brick： 1. Fire clay brick is environmentally friendly and belongs to resource recycling bricks, so we can rest assured use fire clay brick. Fire clay bricks won’t be harmful to our health. 2.Fire clay brick has advantages of fireproof and heat insulation. Used clay brick can be used as concrete so that to save a lot of resources. 3.The price of fire clay brick is not as expensive as that of other fire bricks. Light weight brick is more expensive than fire clay brick. Besides, fire clay brick is very cheap and very durable 4. Fire clay brick has good moisture-proof function, it also has the a...
阅读全文

Installation of ladle slide gate and nozzle

图片
1.Before installing the upper steel ladle, first check the use of the water block brick. When the pit or crack occurs, use the repair refractory material to repair it, and then proceed to the next step. 2. Take the water pipe test, check the gap between the nozzle brick and the brick and the positioning of the nozzle brick. It is forbidden to manually remove the head of the water inlet and install it. 3. After checking the appropriate, remove the nozzle brick and apply refractory mud evenly on the outer wall of the upper nozzle brick. The thickness of the refractory mud is controlled at about 10mm (according to the actual clearance). When the gap between the nozzle and the brick is large, the asbestos cloth can be used. The head of the nozzle is evenly wound separately. 4. When installing the water inlet, the nozzle brick should be smoothly fed into the brick. During operation, avoid the gap in the lower part of the nozzle brick. 5. The water inlet must be re...
阅读全文

Blast furnace accident: six reasons for the freezing of the hearth

图片
1. The furnace is out of order. In many cases, the blast furnace condition is abnormal due to poor quality of the raw fuel or improper basic operating system. 2. Operational errors The prelude to the freezing of the hearth is the furnace cool. It is normal for the blast furnace temperature to fluctuate within a certain range, and the cool furnace that causes the hearth to freeze is often caused by improper operation. 3.A large amount of cooling water leaks into the hearth. 4. Long-term rest or sealing furnace Long-term rest is a common cause of freezing of the hearth even if there is no water leakage from the cooling equipment. 5. Equipment accident If the test is not enough before the start of the furnace, it will often cause equipment accidents. 6. The quality of raw fuel deteriorates. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, bla...
阅读全文