Novel method for modification of KR desulfuration residue
The technology of a desulfurization slag and a new method is applied in the treatment field of molten iron desulfurization slag, and can solve the problems of the accumulation of desulfurization slag such as mountains, dust damage, and serious environmental pollution.
Inactive Publication Date: 2013-04-03
XINJIANG BAYI IRON & STEEL
View PDF7 Cites 16 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Literature search disclosure: (1) Zhang Chengyong, Chen Shouhong, etc. "Application of Bottom Blowing Nitrogen Process in KR Process for Hot Metal Desulfurization" was published in "Steelmaking" in 2010 (3); (2) Li Fengxi, Yu Chenghuan, etc. "Review of KR Process Discussion on Two Desulfurization Processes of Hot Metal and Injection Method" was published in "Steelmaking" in 2000 (1); (3) Zhang Maolin and Xu Anjun's "Comparison of the Application of 2KR Method and Injection Method in Hot Metal Desulfurization" was published in "Steelmaking "Published on May 5, 2009; it can be seen that the desulfurization slag produced by the KR desulfurization process is a kind of reduction slag, and it is easy to pulverize as the temperature of the slag decreases. The pollution is very serious, and there is no good recycling method at present, resulting in the accumulation of desulfurization slag in many steel factories, which has become a kind of dust hazard in steel enterprises
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0016] 1) The desulfurization station and converter use 11m uniformly 3 The slag pot is made of steel castings, and the material is 16MnA;
[0017] 2) Every 5 furnaces of molten iron can be filled with a slag pot after desulfurization operation; the composition of the KR desulfurization slag to be upgraded is S content 1.82, CaO content 33.77, Fe 3 C content 28, Al 2 O 3 Content 5.77, SiO 2 Content 6.31;
[0018] 3) Overturned by crane lifting, first add KR desulfurization slag into the slag tank, each tank needs to add 2.8 tons of desulfurization slag, and then add 14 tons of liquid steel slag from the converter, which will be produced in the slag tank after adding. The oxidation-reduction reaction of the slag, the reaction time is 15 minutes, which changes the properties of the KR slag from reducing to oxidizing, that is, the mineral composition in the slag is improved;
[0019] Among them, KR desulfurization slag is produced by adding desulfurizer to molten iron under mechanical s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a novel method for modification of KR desulfuration residue. Taken a 11<m3> slag ladle of converter slag as an example, the method comprises the steps of swinging and overturning by a travelling crane; first, adding KR desulfuration residue to the slag ladle, wherein 2.0-2.8 tons of desulfuration residue is added into each ladle; then, adding 8-14 tons of liquid slag to a converter; carrying out redox reaction on slag in the slag ladle, wherein the property of the KR residue is converted from reducibility to oxidability, that is, mineral composition in the residue is modified; the KR desulfuration residue is generated by adding a desulfurizer in molten iron which is mechanically agitated, and liquid slag is a byproduct obtained in the process of converter steelmaking. The slag ladle selected is made of 16MnA steel casting.
Description
Technical field [0001] The invention relates to the treatment of molten iron desulfurization slag. The converter liquid steel slag is mixed with KR steel slag for modification treatment, so as to realize the optimization and utilization of the steel slag. Background technique [0002] KR method of molten iron desulfurization, that is, desulfurization by mechanical agitation, is to insert a stirrer made of refractory material into a certain depth below the liquid surface of the molten iron tank and make it rotate. When the stirrer rotates, the molten iron surface forms a "V" shape Vortex (low center and high around). At this time, after adding desulfurizer, the particles of desulfurizer are dispersed in the end area of the blade due to turbulence, and "spit out" along the radius direction, then suspend, rotate and float around the axis In the molten iron, that is to say, the desulfurization agent is involved in the molten iron by this mechanical stirring effect, and the desulfur...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C21B3/04C21C1/02C21C7/064
CPCY02P10/20Y02W30/50
Inventor 俞海明兰飞鹏王瑞利段建勇姜新平王伟戴大奎
Owner XINJIANG BAYI IRON & STEEL