Compressing double deoxidizer for steelmaking and preparation method thereof

A composite deoxidizer, pressed-type technology, applied in the field of pressed-type composite deoxidizer for steelmaking and its preparation, can solve the problems such as difficult removal of deoxidized products, increased steelmaking cost, unstable quality, etc., to reduce nozzle knots The effect of no tumor problem, less alloy burning loss, and improved spheroidization rate

Inactive Publication Date: 2012-08-22
CHANGZHOU MAOSHENGTE ALLOY PROD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, aluminum has a light specific gravity and a low melting point, so it is difficult to add and has a large loss, and its deoxidized products are not easy to float and remove in molten steel, which inevitably leads to problems such as increased steelmaking costs and unstable quality.

Method used

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  • Compressing double deoxidizer for steelmaking and preparation method thereof
  • Compressing double deoxidizer for steelmaking and preparation method thereof
  • Compressing double deoxidizer for steelmaking and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use 15Kg of aluminum powder + 110Kg of electrolytic manganese + 15Kg of passivated calcium powder + 7.5Kg of passivated magnesium powder + 3Kg of alkaline sodium silicate aqueous solution and put them into the mixer for 20 minutes. 20T high-pressure briquetting machine, after pre-pressing, the pressed pellets are screened through the screen, and the pellets that meet the requirements are transported into the mesh belt oven through the belt conveyor, and the underscreen material is re-entered into the briquetting machine through the belt and elevator for pressing; Dry 20min at 120°C in a mesh belt oven to obtain residual moisture at 0.5%, and the pellets whose strength reaches the requirements (strength reaches 120 times / m), are packaged and stored after cooling; obtain 150Kg of the product, and the assay components are as follows:

[0028] Ca 9.95%; Mg 4.98%; Al 9.9%; Mn; 73.1%: S: 0.02%; P: 0.02%, Si: 0.25%;

Embodiment 2

[0030] 15Kg of aluminum powder + 110Kg of electrolytic manganese + 15Kg of passivated calcium powder + 7.5Kg of passivated magnesium powder + 2Kg of alkaline sodium silicate aqueous solution + 1kg of silica sol are put into the mixer and stirred for 20 minutes. Add a high-pressure briquette machine with a pressure of 20T. After pre-pressing, the pressed pellets are screened through a screen, and the pellets that meet the requirements are transported into the mesh belt oven through a belt conveyor. machine pressing; dry 50min at 105°C in a mesh belt oven to obtain pellets with a residual moisture of 0.8% and a strength that meets the requirements (strength reaches 86 times / m), and pack and store after passing the cooling; obtain 150Kg of the product, and test the ingredients as follows:

[0031] Ca 9.5%; Mg 4.5%; Al 9.6%; Mn: 72%: S: 0.02%; P: 0.02%, Si: 0.27%;

Embodiment 3

[0033] Aluminum powder 15Kg + electrolytic manganese 110Kg + passivated calcium powder 15Kg + passivated magnesium powder 7.5Kg + alkaline sodium silicate aqueous solution 1Kg + 1kg aluminum hydroxide gel + polyvinyl alcohol 1kg put into the mixer and stir for 20 minutes. After the conveyor reaches the hoist, evenly add a high-pressure briquetting machine with a pressure of 20T. After pre-pressing, the pressed pellets are screened through a screen, and the pellets that meet the requirements are transported into a mesh belt oven through a belt conveyor. The belt and elevator re-enter the briquetting machine for pressing; the drying temperature is 100°C, and the pellets are taken out after 60 minutes. The measured residual moisture is 0.8%, and the pellets whose strength meets the requirements (strength reaches 82 times / m), after passing the cooling Packing storage; obtain product 150Kg, assay composition is as follows:

[0034] Ca 9.6%; Mg 4.7%; Al 9.68%; Mn: 72.6%: S: 0.02%; P...

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Abstract

The invention aims at disclosing a compressing double deoxidizer for steelmaking, which, by weight percentage, comprises 5-20% of Ca, 0-8% of Mg, 0-20% of Al, less than 0.03% of S, less than 0.02% of P, 2-10% of binder and balanced Mn. The invention further aims at disclosing a preparation method of the compressing double deoxidizer for the steelmaking, raw materials are added in the binder after mixed according to the proportion and evenly mixed, the mixed raw materials are put in a compression molding press with the pressure less than 20T for pressing, the stoving temperature is set to be 60-120 DEG C to dry a compressed double deoxidizer block for 15-60min, and a dried compressed double deoxidizer block is cooled and packaged to obtain the needed compressing double deoxidizer for the steelmaking.

Description

technical field [0001] The invention relates to a pressed composite deoxidizer for steelmaking and a preparation method thereof. Background technique [0002] The manganese-based multi-element composite deoxidizers prepared in the prior art mostly adopt the remelting method or the method of adding aluminum outside the furnace. The remelting method is to melt manganese silicon, ferrosilicon and other alloy semi-finished products together with raw materials such as aluminum ingots and scrap steel to form a multi-component composite deoxidizer. These raw materials will cause a lot of waste of energy after remelting and cooling. Some metal elements have very small solubility in manganese, and it is difficult to obtain an alloy with uniform composition. Oxidation loss, so this method not only has high production costs, but also causes waste of resources, and more importantly, causes environmental pollution. The traditional process of steelmaking is to use ferrosilicon, ferroman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 盛小刚盛国大陈卫文章兼培殷小东
Owner CHANGZHOU MAOSHENGTE ALLOY PROD
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