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Molten steel refining slag forming agent and manufacturing process thereof

A technology of production process and slagging agent, which is applied in the field of molten steel refining slagging agent and its production process, can solve the problems of high impurity content of copper products, affecting the quality of copper products, and slow slagging speed, so as to achieve low cost and shorten the initial stage Slag formation time, effect of lowering melting point

Inactive Publication Date: 2016-06-08
TONGLING ANDONG CAST STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing miscellaneous copper pyrometallurgy process, the smelted copper products have high impurity content, which affects the quality of copper products, and there are difficulties in slag melting, slow slag incoming, high energy consumption, and long smelting time, etc. The final slag content is high The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 A molten steel refining slagging agent is composed of the following components in weight percentage: 25% of aluminum oxide, 25% of silicon dioxide, 8% of manganese oxide, 15% of iron oxide, 10% of calcium oxide, fluoride Calcium 3%, titanium dioxide 5%, magnesium oxide 6%, sulfur ≤ 0.06%, and the rest are impurities.

[0017] A molten steel refining slagging agent and a production process thereof, comprising the following steps:

[0018] (1) The raw material is crushed into particles with a particle size of 5-30mm by a pulverizer, and heated and baked until the moisture content is less than 0.5%;

[0019] (2) sieve the granules obtained in the above step (1) with a 120-450um sieve net, and get the part that has been sunned and mixed manually;

[0020] (3) Put the mixed granules in step (2) into the kang for drying, the drying temperature is 160±20° C., and the drying time is 5 hours;

[0021] (4) Pack the dried particles into a moisture-proof bag and seal...

Embodiment 2

[0024] Embodiment 2 A molten steel refining slagging agent is composed of the following components in weight percentage: 38% of aluminum oxide, 32% of silicon dioxide, 15% of manganese oxide, 20% of iron oxide, 18% of calcium oxide, fluoride Calcium 9%, titanium dioxide 8%, magnesium oxide 15%, sulfur ≤ 0.06%, and the rest are impurities.

[0025] A molten steel refining slagging agent and a production process thereof, comprising the following steps:

[0026] (1) The raw material is crushed into particles with a particle size of 5-30mm by a pulverizer, and heated and baked until the moisture content is less than 0.5%;

[0027] (2) sieve the granules obtained in the above step (1) with a 120-450um sieve net, and get the part that has been sunned and mixed manually;

[0028] (3) Put the mixed granules in step (2) into the kang for drying, the drying temperature is 160±20° C., and the drying time is 5 hours;

[0029] (4) Pack the dried particles into a moisture-proof bag and se...

Embodiment 3

[0032] Embodiment 3 A molten steel refining slagging agent is composed of the following components in weight percent: 30% of aluminum oxide, 28% of silicon dioxide, 12% of manganese oxide, 18% of iron oxide, 15% of calcium oxide, fluoride Calcium 6%, titanium dioxide 6%, magnesium oxide 12%, sulfur ≤ 0.06%, and the rest are impurities.

[0033] A molten steel refining slagging agent and a production process thereof, comprising the following steps:

[0034] (1) The raw material is crushed into particles with a particle size of 5-30mm by a pulverizer, and heated and baked until the moisture content is less than 0.5%;

[0035] (2) sieve the granules obtained in the above step (1) with a 120-450um sieve net, and get the part that has been sunned and mixed manually;

[0036] (3) Put the mixed granules in step (2) into the kang for drying, the drying temperature is 160±20° C., and the drying time is 5 hours;

[0037] (4) Pack the dried particles into a moisture-proof bag and seal ...

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Abstract

The invention discloses a molten steel refining slag forming agent. The molten steel refining slag forming agent comprises, by weight, 25-38% of aluminum oxide, 25-32% of silicon dioxide, 8-15% of manganese oxide, 15-20% of iron oxide, 10-18% of calcium oxide, 3-9% of calcium fluoride, 5-8% of titanium dioxide, 6-15% of magnesium oxide, less than or equal to 0.06% of sulfur, and the balance impurities. Compared with the prior art, the slag forming agent prepared through the process can overcome the defects of a low slag forming speed and a low dephosphorization rate existing in the steelmaking process, and can effectively lower the melting point of solid and the melting point of refractory substances, effectively shorten the preliminary-stage slag forming time and increase the end-point molten steel dephosphorization rate of a converter. The slag forming agent has the characteristics of being low in cost and reducing the melting point of furnace slag and can have the remarkable effects of saving energy, reducing consumption and lowering cost.

Description

technical field [0001] The invention relates to the technical field of molten steel slagging agents, in particular to a molten steel refining slagging agent and a production process thereof. Background technique [0002] The slag-forming agent is made of lime and an appropriate amount of flux such as iron oxide scale, fluorite, manganese oxide or other oxides, and is prefabricated at low temperature. This synthetic slag agent has low melting point, high alkalinity, uniform composition, small particle size, and is easy to break at high temperature, and the slagging speed is fast, thus reducing the burden of converter slagging. During steelmaking, the added slag-forming flux is fused with the oxidation products of impurity elements in the raw material to form slag, which removes S and P and absorbs non-metallic inclusions. [0003] In the existing miscellaneous copper pyrometallurgy process, the smelted copper products have high impurity content, which affects the quality of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
CPCC21C7/0037C21C7/0645
Inventor 梅百荣
Owner TONGLING ANDONG CAST STEEL