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Reclamation of Waste from Iron and Still Mills


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  1. Crushing technology of the sand slags
  2. The plant with panel manufacturing technology
  3. The plant with the manufacturing technology of sludge and dust soliditicafion
  4. Product of soil improvement agent with silica acid particles
  5. The plant with technology of extracting the iron ingredient which remains in slags
  6. The plant with mixing and pressing technology of steel sludge particles
  7. The plant with manufacturing technology of fire-resistant coating material for steel frames
  8. Development of utilization for steel wastes
  9. The plant with the powder pelletizing technology
  10. The plant with the special binder manufacturing technology for steel sludge dusts
  11. Interior and exterior construction panels inorganic panels
  12. The plant with manufacturing technology of ball type pellet with sludge dusts
  13. The plant with rock wool manufacturing technology from the smelting slags
  14. The plant with slag board (thermal insulation material) manufacturing technology

SLAG WOOL MANUFACTURING TECHNOLOGY USING THE SMELTING SLAGS

The slag clusters are first crushed and the particles with the diameter of 80 ~ 100mm are selected. These are mixed with natural stones in a certain ratio upon the product manufacturing feature. The mixture is re-smelted with cokes and the smelted liquid is steadily dropped into the high speed rotor where high pressure air is blowing. This results in the formation of fibers that are wound around the rotor. By cooling them down slowly, the fiber¡¯s elasticity is restored. Finally, they are piled and unloaded. This process results in what is called SLAG WOOL. The fibers that have been properly processed are applied to such materials as fire-resistant coating for building¡¯s steel-frames, sound absorption, heat isolation and inorganic fiber filler and many more.

SOIL IMPROVEMENT AGENT MANUFACTURING TECHNOLOGY USING THE IRON SLAGS

We developed the soil improvement agent using alkaline of sand slags, and succeeded in developing the filler of complex fertilizer and siliceous particle (ball type) product by means of the particle-making technology from powders using the pelletizer after crushing the slags to the specified size 

PANEL MANUFACTURING TECHNOLOGY USING CASTING IRON SLAG

We produce the panel from the sand slags by extracting the iron ingredient from them, crushing them to about 4,000 blaine with a crusher and mixing the special cement for the inorganic fiber slag wool and binder.

PELLET MANUFACTURING TECHNOLOGY USING STEEL SLUDGE

The sludge dust is put through a series or dehydration, drying, maturing and mixing with small amount of inorganic binder in the highly efficient mixer. It is then finally rolled in the plaster by centrifugal friction. This process molds these sludge dusts into a sphere shaped balls, each with a diameter of 8~30mm. After curing these pellet balls for a certain period of time and revealing of 160kg/EA, a necessary precondition for recycling. 

THE SOLIDIFICATION TREATMENT TECHNOLOGY OF IRON SLUDGES

We developed the technology of manufacturing sludge and dust blocks with the highly efficient mixer and the special molder. These blocks have the strength of 80kg/cm ³» that they do not cause the secondary environmental problem by interment. The molded blocks are possible to use for construction material. 

MANUFACTURING TECHNOLOGY FOR SCRAP IRON SUBSTITUTE USING STEEL SLUDGE

The oxide iron (Fe O) becomes Fe when it is melted at a high temperature. Once all the byproducts are refined to select the oxide iron, the oxide iron is mixed with the iron sludge and is put into the electric furnace after the process of the pressurization, vibration and molding. The oxide iron blocks becomes iron in the smelting reactor, passing through the slag layer.

¢Ä STATUS

A lot of sludge and dust are produced from the process of purifying the industrial and waste water of iron foundry. In order to dispose of the sludge and dust, which have relatively little potential for recycling, it is necessary to build on the interment site. This will entail huge cost and wide open spaces.

¢Ä RECYCLING TECHNOLOGY

We developed the technology of manufacturing sludge and dust blocks with the highly efficient mixer and the special molder. These blocks have the strength of 80kg/cm so that they do not cause the secondary environmental problem by interment. The molded blocks are possible to use for construction material.

¢Ä EFFECT

Environmental Improvement / Cost Reduction for Waste Disposal /The Construction Materials

¢Ä PROCESS¡¡

   

¢Ä TECHNOLOGY

We have operated the said facilities (500,000 ton/yr) since 1995.

-The plant with the manufacturing technology of sludge and dust soliditicafion.

 

¢Ä     STATUS

    Only partial amount of the oxide iron (Fe O), produced from the process of steel-manufacturing, material selection and hot-roll, is recycled and the rest is interred away. This causes environmental problems as well as cost increase in steel manufacturing due to the disposal of a potential resource.¡¡

¢Ä     MANUFACTURING TECHNOLOGY

    The oxide iron (Fe O) becomes Fe when it is melted at a high temperature. Once all the byproducts are refined to select the oxide iron, the oxide iron is mixed with the iron sludge and is put into the electric furnace after the process of the pressurization, vibration and molding. The oxide iron blocks becomes iron in the smelting reactor, passing through the slag layer.¡¡

¢Ä      EFFECT

          Maximization of recycling the iron byproduct including sludges / Cost Reduction for Waste Disposal

¢Ä     PROCESS DIAGRAM

        

¢ÄTECHNOLOGY

  • We have operated the said facilities (400,000 ton/yr) since 1995.
-The plant with technology of extracting the iron ingredient which remains in slags
-The plant with mixing and pressing technology of steel sludge particles

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¢Ä  STATUS

The smelting slags are byproduction of the steel foundry's casting iron process.These slags are left to age in the atmosphere for an extended period and then crushed.They are selectively picked by their specific size and are used in manufacturing road base courses, synthetic gravels and eventually remicon. We developed the innovative technology to produce the slag wools with the smelting slags for recycling.

¢Ä   MANUFACTURING TECHNOLOGY

The slag clusters are first crushed and the particles with the diameter of 80 ~ 100mm are selected. These are mixed with natural stones in a certain ratio upon the product manufacturing feature. The mixture is re-smelted with cokes and the smelted liquid is steadily dropped into the high speed rotor where high pressure air is blowing. This results in the formation of fibers that are wound around the rotor. By cooling them down slowly, the fiber¡¯s elasticity is restored.Finally, they are piled and unloaded. This process results in what is called SLAG WOOL.The fibers that have been properly processed are applied to such materials as fire-resistant coating for building¡¯s steel-frames, sound absorption, heat isolation and inorganic fiber filler and many more.

¢ÄSOME POSITIVE EFFECTS FROM THE RECYCLING TECHNOLOGY

¡§ Maximization in use of the byproducts from the steel manufacturing process
¡§ Environmental improvement, for instance substituting for asbestos and styrofoam
¡§ Artificial soil for agriculture with slag wool

¢Ä   PROCESS DIAGRAM

      

¢Ä   TECHNOLOGY

  • ¡§ We have operated the said facilities since 1994.
-The plant with rock wool manufacturing technology from the smelting slags
-The plant with manufacturing technology of fire-resistant coating material for steel frames
-The plant with slag board (thermal insulation material) manufacturing technology

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¢Ä   STATUS

The sand slags, generated from the slag treatment process of the casting iron, have been utilized for recycling in the limited areas of cement raw material and panel manufacturing.We developed the innovative technology for the sand slag recycling in the soil improvement agent.

¢Ä   RECYCLING TECHNOLOGY

We developed the soil improvement agent using alkaline of sand slags, and succeeded in developing the filler of complex fertilizer and siliceous particle (ball type) product by means of the particle-making technology from powders using the pelletizer after crushing the slags to the specified size.

¢Ä   SOME POSITIVE EFFECTS FROM THE RECYCLING TECHNOLOGY

¡§ Application of iron-making byproduct to agriculture

¡§ Maximization of the resource application

¡§ Minimization of the soil restoration time

¢Ä   PROCESS DIAGRAM

      

¢Ä   TECHNOLOGY

  • ¡§ We have operated the said facilities (100,000 ton/yr) since 1997.
-The plant with the powder pelletizing technology
-Product of soil improvement agent with silica acid particles

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¢Ä   STATUS

The slags are formed on the upper part of smelting liquid in the casting iron process of smelting iron ore, limestone and cokes in the iron foundry. By spraying the high pressure water during the discharge, the slag solution is separated and the particles are formed whose sizes are equivalent to that of a grain of sand. These particles are called ¼Û sand slag and have been reused as one of the ingredient in cement. We developed the technology of panel manufacturing with the sand slags.

¢Ä   MANUFACTURING TECHNOLOGY

We produce the panel from the sand slags by extracting the iron ingredient from them, crushing them to about 4,000 blaine with a crusher and mixing the special cement for the inorganic fiber slag wool and binder.

¢Ä   POSITIVE EFFECT FOR RECYCLING TECHNOLOGY

¡§ Utilization of the sand slags for construction materials

¡§ Maximization of recycling the waste

¢Ä   PROCESS DIAGRAM

     

¢Ä   TECHNOLOGY

¡§ We have operated the said facilities (3,200,000m/yr) since 1996.

-Crushing technology of the sand slags

-The plant with panel manufacturing technology

-Interior and exterior construction panels inorganic panels

¢Ä   STATUS

In each of the steel foundry¡¯s processes, microscopic dusts are produced. These dust particles, which are collected by electric or standard dust collectors, contain the same iron component ration as the iron ore. In general, these have been interred after solidification or used as additives for portland cement manufacturing.We developed the technology of recycling the wastes, resulting in cost reduction for waste disposal.

¢Ä   SUMMARY OF RECYCLING TECHNOLOGY

The sludge dust is put through a series of dehydration, drying, maturing and mixing with small amount of inorganic binder in the highly efficient mixer. It is then finally rolled in the plaster by centrifugal friction. This process molds these sludge dusts into a sphere shaped balls, each with a diameter of 8~30mm. After curing these pellet balls for a certain period of time and revealing the hardness of 160kg/each, a necessary precondition for recycling.¡¡

¢Ä   POSITIVE EFFECT FOR RECYCLING TECHNOLOGY

¡§ Cost reductions for waste disposal by recycling the sludge dusts

¢Ä   PROCESS DIAGRAM

      

¢Ä    APPLICABLE STEEL WASTE

    ¡§ Electric furnace dust¡§ Steel manufacturing dust ¡§ Lime plastic dust

   ¡§ Cokes dust¡§ Casting iron dust¡¡

¢Ä    TECHNOLOGY

     ¡§ We have operated the said facilities(360,000 ton/yr) since 1995.

     -The plant with manufacturing technology of ball type pellet with sludge dusts

     -The plant with the special binder manufacturing technology for steel sludge dusts

     -Development of utilization for steel wastes

 


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