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Application of Magnesia in Foundry Binder(2)

Application of Magnesia in Foundry Binder(2)

2020-09-28

As magnesium oxide is a magnesite ore that is calcine and then ground into powder, When the calcination temperature is 750-850 ℃, the content of magnesium oxide can become 75%-85%, of which only 60%-65% is active magnesium oxide. The activity of magnesium oxide gradually decreases with the extension of storage time. As the activity of magnesium oxide is an important basis for batching, it is necessary to know the activity of magnesium oxide when leaving the factory before batching. After leaving the factory and using for several months, the activity needs to be tested again. If it is left for too long, magnesium oxide will become magnesium hydroxide due to moisture, and the caked magnesium hydroxide has almost no activity, so it cannot be used, but it can be regenerated.

Mixing Equipment Used in Solid Agents Production(1)

Mixing Equipment Used in Solid Agents Production(1)

2020-09-28

With the continuous enrichment of the variety of solid preparation powder products, the types of mixers, as one of its main production equipment, have also become varied.

Cold Briquetting From Fine Ore(1)

Cold Briquetting From Fine Ore(1)

2020-09-28

The ore powder treatment and processing used in ferroalloy smelting generally adopts pellet and sintering process, and the pellet is divided into pelletizing and pelletizing according to the pelletizing method. According to whether the pellets are roasted at high temperature and consolidated at low temperature after forming, they can also be divided into high temperature roasted, pre-reduced pellets and cold pressed pellets. At present, most of the fine ore treatment processes tend to pre-reduce and roast pellets. Cold-pressed pellets have the characteristics of low engineering investment, simple process flow, low labor cost and wide selection of powder particle size range, which cannot be replaced by other processes, especially in some enterprises with small investment scale and small powder ore treatment capacity.

Application of Magnesia in Foundry Binder(1)

Application of Magnesia in Foundry Binder(1)

2020-09-18

Synthetic organic binders for casting, such as furan resin and phenolic resin, are easy to release carcinogens due to incomplete combustion and pyrolysis during high-temperature molten iron pouring. Here we will discuss the environment-friendly and cheap inorganic binder magnesium oxychloride. The main component of its material is light burned active magnesium oxide, i.e. Magnesite ore. Its matching material magnesium chloride is a by-product of salt making industry. The combination of these two materials is inorganic hydrate material and has been used in many industries

Optimization of Silo of Vertical Intensive Mixer

Optimization of Silo of Vertical Intensive Mixer

2020-09-18

The mixing of powder materials is very common in industrial production and occupies a very important position in the production process. It is widely used in metallurgy, pharmacy, construction and other aspects. Vertical high intensive mixer is an important equipment in mine material production system. Horizontal mixer has been used for a long time, but its mixing effect is poor and energy consumption is very large. The vertical multi-propeller high intensive mixer being developed lacks design theory and experience, and there are many key technologies to be overcome. According to EDEM discrete element simulation method, the movement process of the mixer bin is simulated, and the rotation parameters of the mixer bin are optimized to improve the mixing effect and service life of the mixer.

Cold Briquette With Chrome Ore Fines

Cold Briquette With Chrome Ore Fines

2020-09-18

At present, the main raw materials for smelting ferrochromium alloy are chromium lump ore and chromium fine ore. Due to the requirement of air permeability of furnace burden in the smelting process, chromium lump ore is usually more suitable for smelting. However, with the large demand for resources in the contemporary ferrochromium alloy industry, there are fewer and fewer chromium ores suitable for direct furnace entry and the price is getting higher and higher. At the same time, with the increase of chromium ore mining and the decrease of crude ore grade, the output of chromium fine ore is getting higher and higher. In smelting, compared with chromium lump ore, chromium fine ore is easy to lead to poor thermal permeability of ore and cannot be directly put into the furnace, but it has better characteristics than chromium lump ore in other aspects, such as high taste and low price.

Binder for Coke Powder Cold Briquetting-Sodium Silicate

Binder for Coke Powder Cold Briquetting-Sodium Silicate

2020-09-08

Coke is the main fuel in iron-making industry, but coke is fragile and there are a lot of cheap coke powder. However, the high content of coke powder in iron-making fuel will inevitably affect the air permeability in the furnace during iron making, so it is necessary to block coke powder. At present, coke powder can only be made into blocks by agglomeration method, and the key technology is the development of molding binder. Common binders include inorganic binders, such as hydrated lime, Portland cement and bentonite, which only make the green ball strength of coke powder pellets meet the use requirements, but the dry ball strength cannot meet the use requirements. In addition, there are industrial wastes, such as sulfurous acid pulp waste liquid, which contains sulfur, which will cause harm to iron-making and will not be used in general. Pure organic binder, expensive. Sodium silicate is rich in resources and low in price.

Powder Mixing in Planetary Mixer

Powder Mixing in Planetary Mixer

2020-09-08

Planetary mixer is a kind of fixed container batch spiral mixer. It relies on the spiral rotation and revolution in the inverted conical container to make the powder in the container undergo three-dimensional convection, shear and diffusion mixing.

Application of high-strength aluminum iron briquette

Application of high-strength aluminum iron briquette

2020-09-08

As one of the main deoxidizers in steelmaking process, Al-Fe alloy has strong deoxidizing and purifying effects, which can improve the morphology of inclusions and reduce the content of gas elements in molten steel. However, the requirements for aluminum-ferroalloy are very high and strict in terms of production technical standards and quality. Due to the complex production process, high energy consumption, high pollution and the improvement of environmental protection requirements in the production of aluminum-iron alloy briquette by medium frequency induction furnace, its application space is gradually reduced.

Research on High Pressure Grinding Rollers

Research on High Pressure Grinding Rollers

2020-08-28

Energy is an important material basis for human survival and development, and is also the focus of international politics, economy, military and diplomacy. Therefore, the requirements for energy conservation, consumption reduction and efficiency improvement in concentrator are getting higher and higher. In all the processes of the concentrator, the grinding process consumes a lot of energy, and the consumption of lining plates, steel balls and other materials is also relatively high. Its energy consumption accounts for about 50%-70% of the total energy consumption of the whole concentrator, while the energy consumption of the grinding process accounts for more than 60% of the whole grinding process. Therefore, the grinding system also directly determines the production cost of the concentrator and the consumption of various energy and materials.

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