Method for sandblasting surface of workpiece by utilizing steelmaking converter slag
A technology for sand blasting and workpiece surface, which is applied in recycling technology, manufacturing tools, manufacturing converters, etc. It can solve the problems of poor resistance to crushing, achieve the effects of improving adhesion, facilitating recycling, and cheap prices
Active Publication Date: 2014-04-09
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0007] The purpose of the present invention is to overcome the problem that the steelmaking converter slag is poorly resistant to crushing when used as a blasting abrasive in the prior art, and provides a method for blasting the surface of a workpiece using steelmaking converter slag. The technical scheme enables the steelmaking converter slag to be recycled, and the improvement of the process makes the steelmaking converter slag more resistant to crushing when used as an abrasive
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Embodiment 1
[0032] Such as figure 1As shown, a method for blasting the surface of a workpiece using steelmaking converter slag in this embodiment, the steps are:
[0033] Step 1. Pretreatment of converter slag: molten steel is smelted in a converter. At the end of converter steelmaking, the converter slag is pretreated by adding flux into the converter. In this embodiment, the amount of flux added is 3.3kg / ton of steel, which helps The composition of the flux is a mixture of CaO and MgO. In this example, the mass ratio of CaO and MgO is 1:1.2; after pretreatment and adjustment, the converter slag can include the following mass percentages: 1.87-2.35% Al 2 o 3 , 42.51~45.37%CaO, 0.82~0.91%FeO, 11.83~12.95%MgO, 0.51~1.78%MnO, 0.78~0.91%P, 0.09~0.18%S, 12.34~13.59%Si 2 O, 23.53-24.31% TFe, 0.58-0.73% f-CaO, the converter slag after pretreatment adjustment in this embodiment contains the following components by mass percentage: 1.93% Al 2 o 3 , 44.81%CaO, 0.84%FeO, 12.45%MgO, 1.34%MnO, 0....
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Abstract
The invention discloses a method for sandblasting the surface of a workpiece by utilizing steelmaking converter slag, and belongs to the technical field of comprehensive utilization of the steelmaking converter slag. The method comprises the following steps: 1, converter slag pretreatment: adding a flux into a converter at the final converter steelmaking stage to carry out converter slag pretreatment; 2, converter slag air quenching treatment: sending liquid converter slag into an air quenching treatment station through a slag tank vehicle, allowing the liquid converter slag to flow out of a tundish, blowing through air injected through a Laval nozzle, and crushing to particles; 3, converter slag sorting treatment: carrying out three-level sorting of the obtained magnetically-separated converter slag particles; and 4, sandblasting, wherein sandblasting nozzles comprise a center nozzle and circumferential nozzles, 3-5 circumferential nozzles are uniformly distributed in the periphery of the center nozzle, and each of the center nozzle and the circumferential nozzles is a Venturi nozzle. The steelmaking converter slag has the advantages of good abrasive crushing resistance, benefiting for the recycle, realization of the circulating frequency reaching 10, and great reduction of the sandblasting cost as a sandblasting abrasive.
Description
technical field [0001] The invention relates to the technical field of comprehensive utilization of steelmaking converter slag, and more specifically relates to a method for blasting the surface of a workpiece with steelmaking converter slag. Background technique [0002] Steelmaking plants produce a large amount of steelmaking converter slag every year. The components of these steelmaking converter slags are complex and changeable. They contain less gelatinous minerals and lower activity. The f-CaO and MgO contained in them are likely to cause poor stability. This makes the comprehensive utilization of steelmaking converter slag more difficult. Only a small amount of the huge amount of steelmaking converter slag is utilized, and most of the rest are piled up, which not only occupies a large amount of arable land, but also pollutes the air and water sources, bringing more and more environmental problems. [0003] Sand blasting is a treatment process that uses compressed air...
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IPC IPC(8): B24C11/00C21C5/36C21B3/06
CPCY02W30/50
Inventor 周俐常立忠王海军丁陈来
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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