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How Should Refractory materials Resolve Overcapacity?

Le 21 octobre 2016, 10:09 dans Humeurs 0

To resolve the overcapacity, the first is "swelling" in theory the second is to expand the market demand. Under the condition of the refractories market shrinking, expanding market demand is not possible. In a shrinking market, in order to survive to spell price for users, manufacturing enterprises conduct a disorderly competition. So only need "swelling", and "swelling" can only be taken to eliminate market backward production capacity. Therefore, how should refractory materials get rid of overcapacity, the key point to make rectification in transformation and upgrading, environmental governance, resource control, etc. The following four aspects as the analysis of current situation of the development of refractory industry, and corrective actions of refractory industry.

1. Refractory enterprises need transfer and upgrade to energy saving, environmental protection, improving quality and reducing costs, and the automatic production

At present, the refractory enterprises existing problems are: serious pollution, harm to people's livelihood, high energy consumption, waste of resources, hard to recruit workers, large intensity, product sales of low-margin, difficult to accept payments and loss ratio is widening. Transformation and upgrading must conduct zero emission to environmental. Products are pollution-free, the service life is long, production equipment is automation development. Save people, save electricity, save maintenance, safety in production to reduce production costs, enhance product competitiveness. In the implementation of new environmental laws and severe overcapacity in the fierce competition, not to conduct environmental protection zero emissions, automated production equipment, high-quality development and cost reduction is no way out. Through the transformation and upgrading, energy saving, environmental protection, improving quality, cost reduction to occupy the market, promote the market elimination backward capacity.

2. Refractory enterprises layout need to go joint, mergers and reorganization enterprise of transformation and upgrading

At present, due to a lot of enterprises, small and scattered pattern, exacerbate overcapacity and disorderly competition, lack of enterprise market power. To guide joint coordination with strength enterprises merging to form large enterprise groups, to promote healthy development of the industry.

3. Refractory enterprises need to transfer and upgrade from the supplier  to service provider

In constant innovation and development of science and technology, the management is also constantly innovation transformation.  

What Installation Steps Does Ceramic fiber module have ?

Le 20 octobre 2016, 11:25 dans Humeurs 0

The installation steps of Ceramic fiber module:

1. Scrap rust: before construction, steel structure party need scrap rust to the furnace wall copper plate, in order to meet the welding requirements.

2. Wiring: according to the design drawings as shown in the ceramic fiber module arrangement, pay off on the wall board, mark the welding points of anchor bolt arrangement.

3. Welding bolts: according to the design, welding the corresponding length of bolt on the furnace wall board according to the requirements of welding, when welding, should take protective measures to the bolt thread part, shall not  splash down welding slag to the part of the bolt screw thread, and ensure the welding quality.

4. Smear high-temperature and anticorrosive coating layer: according to the provisions of the design drawings, on the wall plates and bolts' root evenly welds high temperature anticorrosive coating layer, the coating thickness according to 3 kg/m2. When brushing, should take the protection measures to bolt thread part, must not splash down coating to the part of the bolt screw thread.

5. Tile carpet installation: laid the first layer of fiber blanket, and then laid the second fiber blanket, a stagger volume of joints should be no less than 100 mm. For the convenience of construction, furnace roof tile need make rapid card to make temporary fixed.

6. The installation of module

7. The installation of compensate carpet


8. Lining repair: finish the whole lining installed, from top to bottom for renovation.

Nature of Conjugate Decides High Temperature Structure Strength of Magnesia Brick

Le 19 octobre 2016, 09:39 dans Humeurs 0

Due to good high temperature performance of magnesia brick, strong alkaline slag resistance, is widely used in steel industry of the steelmaking furnace lining, the ferroalloy furnace, metal mixer, non-ferrous metallurgy industry furnace, building materials of lime kiln, glass industry regenerator grid body of heat exchanger, refractory industry of high temperature calcination kiln and tunnel kiln, etc. The refractoriness of magnesia brick reaches up to above 2000 , and refractoriness under load is with the melting point of combination phase and generates liquid phase under high temperatures result happening changes. General magnesia brick's load softening temperature is at 1520 ~ 1600 .

Magnesia brick's linear expansion rate at 1000 ~ 1600 is generally 1.0% ~ 2.0%, in refractory products, the thermal conductivity of magnesia brick is next only to carbon brick, it reduces with the rise of temperature. Under the condition of 1100 water-cooled, the number of magnesia brick's thermal shock is only 1 ~ 2 times. Magnesia brick has strong basic slag resistance capability to CaO and iron oxygen, but weak acid slag resistance ability to SiO2, so when using, is not direct contact with silica brick, and generally will be separated with a neutral brick. Under normal temperature, the conductivity of the magnesia brick is very low, but at high temperature, the conductivity will not be ignored. Performances of magnesia brick, because of the different raw materials, production equipment, technology measures, have a large difference. The  differences between the  rul starting temperature of magnesia brick and collapse temperature is not big, it has bigger difference with silica brick, it is because the main phase composition of magnesia brick is periclase, but periclase crystal is not crystalline network skeleton within magnesia brick, but was cemented by combination.


Therefore, the nature of the combination decides high temperature structure strength of magnesia brick. In ordinary magnesia brick, although periclase grain melting point of magnesia brick is higher, but there are around 1500 molten silicate phase existing, and the viscosity of liquid phase viscosity under high temperature is very small, so the differences between the load deformation temperature of common magnesia brick and collapse temperature is not big, but has bigger difference with refractoriness. And high purity magnesia brick's rul start temperature can reach 1800 , mainly due to the combination of the periclase grain is forsterite or dicalcium silicate, and eutectic solution's melting temperature it and MgO formed is high, the strength between crystal lattice is big and plastic deformation under high temperature is small, crystal particles combination is good. 

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