Method and system for echelon resource separation of tailings of stainless steel refining furnace
A technology for stainless steel and refining furnaces, which is applied in the field of graded resource separation of stainless steel refining furnace tailings, which can solve the problems of failure to realize the full utilization of high value-added closed resources of stainless steel refining furnace tailings, unstable cracking of building materials, and large dust.
Pending Publication Date: 2020-12-01
广西冶固科技发展有限公司
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Problems solved by technology
The components of stainless steel refining furnace tailings and iron and steel blast furnace tailings and submerged arc slag are similar but the content is different; after blast furnace slag and submerged arc slag are re-selected and recovered from residual metals, the remaining materials are pulverized to prepare fine powder, which can be used as cement, Concrete admixture application; however, the content of free calcium oxide and free magnesium oxide inert substances in the tailings of stainless steel refining furnaces is relatively high, and the materials obtained after metal gravity separation and recovery are likely to cause unstable cracking and strength reduction of building materials, so they cannot be directly mixed with blast furnace slag , ore slag similar applications
[0003] At present, the separation and recovery of stainless steel refining furnace tailings mainly focus on the recovery, extraction and smelting of valuable metals in stainless steel refining furnace tailings. For example, Chinese patent CN109468467A provides a method for recycling valuable metals from solid waste in the iron and steel industry, but This method lacks a resource utilization scheme for the remaining tailings; Chinese patent CN106179674A provides a method and system for resource recovery and utilization of steelmaking tailings, but this method uses relatively rough means to separate the tailings by impact damage, which can High consumption, large dust, did not realize the wet multi-stage separation and step-by-step resource utilization of tailings
The existing sorting and recovery treatment of stainless steel refining furnace tailings generally has the problems of rough process and incomplete sorting, and the full utilization of high value-added closed resources of stainless steel refining furnace tailings has not been realized
Method used
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Embodiment 1
[0069] The tailings of the stainless steel refining furnace placed in the hopper are transported to the rod mill through the belt conveyor, and the tailings with a particle size of less than or equal to 50 mm are transported forward to the cylindrical screen connected to the rod mill;
[0070] The cylindrical sieve is composed of two horn-shaped cylindrical screens with a length of 1000m in series, and the first section of the cylindrical sieve and the second section of the cylindrical sieve are arranged in sequence according to the direction of material travel, wherein the first The diameter of the outlet of the cylindrical sieve is 1080mm, the size of the sieve gap is 2×30mm, the diameter of the outlet of the second cylindrical sieve is 1680mm, and the aperture of the screen is 2mm. The screening process is as follows: the material first passes through the first One section of cylindrical sieve, the material larger than 30mm cannot leak out, and is directly output; the materi...
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Abstract
The invention belongs to the technical field of solid waste treatment, and particularly relates to an echelon resource separation method and system for tailings of a stainless steel refining furnace.According to the method provided by the invention, a wet separation physical means is adopted in the whole process, so that dust pollution and sludge pollution are avoided; the method comprises the following steps: screening is performed to obtain screened materials with different particle sizes; then a jigger with a specific gravity separation function and a table concentrator are used for carrying out multi-stage separation on screened products, the separation efficiency and the extraction proportion of stainless steel in the tailings of the stainless steel refining furnace are improved, slag mud obtained through table concentrator separation is further separated through vibration, and tailings sand with different particle size gradations is obtained. According to the method provided bythe invention, the stainless steel refining furnace tailings are subjected to echelon resource separation, the obtained screened products can be reasonably graded, the adverse effect of instability onbuilding material formation during stainless steel refining furnace tailings recycling is avoided, and closed echelon resource utilization of the stainless steel refining furnace tailings is facilitated.
Description
technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a method and system for step-by-step resource sorting of stainless steel refining furnace tail slag. Background technique [0002] In the metallurgical industry, a large amount of stainless steel refining furnace tailings will be produced after stainless steel refining. After the primary selection of stainless steel refining tailings, 1-6wt.% of massive, sandy or powdery stainless steel and 94-99wt.% of inorganic Solid tailings. The components of stainless steel refining furnace tailings and iron and steel blast furnace tailings and submerged arc slag are similar but the content is different; after blast furnace slag and submerged arc slag are re-selected and recovered from residual metals, the fine powder prepared by grinding the remaining materials can be used as cement, Concrete admixture application; however, the content of free calcium oxide and fr...
Claims
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Login to view more IPC IPC(8): B03B9/06B02C21/00
CPCB03B9/061B02C21/00Y02W30/52
Inventor 徐梓龙张志平泮金昌
Owner 广西冶固科技发展有限公司
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