阅读说明：本技术 侧吹转炉过饱和富氧熔炼工艺 (Supersaturated oxygen-enriched smelting process for side-blown converter ) 是由 谌宏海 汤海波 汪领锋 何仁欢 肖春红 朱万鹤 于 2019-12-06 设计创作，主要内容包括：本发明涉及有色金属冶炼技术领域,提供侧吹转炉过饱和富氧熔炼工艺,包括化验、计算、压制、侧吹转炉冶炼等工艺流程,使用侧吹转炉来进行过饱和富氧熔炼,结合二者的优点,并对相应的工序进行相应的优化,充分利用现有冶炼技术优化组合提供了一种稳定可靠、原材料利用率高的冶炼方法,解决了现有的过饱和富氧熔炼工艺存在的工艺复杂、原材料利用率低的缺点。(The invention relates to the technical field of non-ferrous metal smelting, and provides a side-blown converter supersaturated oxygen-enriched smelting process, which comprises the process flows of chemical examination, calculation, pressing, side-blown converter smelting and the like, wherein a side-blown converter is used for supersaturated oxygen-enriched smelting, the advantages of the side-blown converter and the side-blown converter are combined, corresponding optimization is carried out on corresponding procedures, the optimized combination of the existing smelting technology is fully utilized, and the invention provides a smelting method which is stable and reliable and has high raw material utilization rate, and overcomes the defects of complex process and low raw material utilization rate of the existing supersaturated oxygen-enriched smelting process.)

1. The side-blown converter supersaturated oxygen-enriched smelting process is characterized by comprising the following process flows:

step a, preparing raw materials of iron sand, river sand, lime and washing slag, and testing the content of Fe, Si and Ca elements in each raw material;

step b, calculating the weight ratio of the raw materials of iron sand, river sand, lime and washing slag according to the content of Fe, Si and Ca elements tested in the step a, so that the content of Fe in the mixture of the raw materials is 11 percent, and SiO is contained in the mixture₂The content of (2) is 13% and the content of CaO is 7%;

step c, uniformly mixing the iron sand, the river sand, the lime and the washing slag according to the proportion calculated in the step b;

step d, pressing the mixture obtained in the step c into a raw material brick by using a brick making machine;

and e, adding the raw material bricks and the coke into a side-blown converter for smelting to finally obtain the alloy, the ice copper cover, the water-quenched slag and the secondary soot.

2. The side-blown converter supersaturated oxygen-enriched smelting process of claim 1, wherein a forklift is used for uniformly mixing iron sand, river sand, lime and washing slag in the step c.

3. The side-blown converter supersaturated oxygen-enriched smelting process as claimed in claim 1, wherein in step e, the smelting condition is coke rate delta₁15%, air volume ζ₁＝3600m³H, oxygen concentration η₁＝21％。

4. The side-blown converter supersaturated oxygen-enriched smelting process as claimed in claim 1, wherein in step e, the smelting condition is coke rate delta₂14%, air volume ζ₂＝1700m³H, oxygen concentration η₂＝30％。

5. The side blown converter supersaturation as claimed in claim 1The oxygen-enriched smelting process is characterized in that in the step e, the smelting condition is coke rate delta₃14%, air volume ζ₃＝1600m³H, oxygen concentration η₃＝42％。

6. The side-blown converter supersaturated oxygen-enriched smelting process as claimed in any one of claims 1 to 5, wherein after step e, the lead metal content in the alloy, the lead content in the raw materials and the lead recovery rate are calculated.

Technical Field

The invention relates to the technical field of non-ferrous metal smelting, in particular to a supersaturated oxygen-enriched smelting process of a side-blown converter.

Background

Oxygen-enriched smelting is a smelting method which uses industrial oxygen to partially or completely replace air so as to strengthen a metallurgical process. In the 50 s of the 20 th century, industrial oxygen steelmaking and blast furnace oxygen-enriched iron making were widely used due to the development of high-efficiency and low-cost oxygen generation methods and equipment. Meanwhile, in the non-ferrous metal smelting, a method for increasing the oxygen content of air in blast air is also used for developing a new smelting method and transforming the laggard traditional process. A side blown converter (side blown converter) is a commonly used metal smelting device, and is a converter steelmaking method in which air or oxygen is blown from the side of a converter body to oxidize and remove impurity elements in molten iron and provide heat to obtain molten steel. The main content of the technical scheme is that the supersaturated oxygen-enriched smelting is carried out by using the side-blown converter, the advantages of the supersaturated oxygen-enriched smelting are combined, and the corresponding working procedures are correspondingly optimized, so that the stable and reliable smelting method with high raw material utilization rate is provided by fully utilizing the optimized combination of the existing smelting technology.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a supersaturated oxygen-enriched smelting process of a side-blown converter, which is used for solving the defects of complex process and low utilization rate of raw materials in the conventional supersaturated oxygen-enriched smelting process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a process flow diagram of a side blown converter supersaturated oxygen-enriched smelting process of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.