Direct production method for lead calcium rare earth alloy
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A rare earth alloy and production method technology, which is applied in the field of direct production method of lead-calcium rare earth alloy, can solve the problems of troublesome batching calculation, complicated production process and high production cost, and achieves reduced production cost, low slag content and uniform structure distribution. Effect
Inactive Publication Date: 2011-03-30
ZHUZHOU SMELTER GRP
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The traditional production method of lead-calcium rare earth alloy is to prepare a lead-rare earth master alloy first, and then mix and melt this master alloy with lead and calcium to obtain a finished lead-calcium rare earth alloy. Chinese patent 200710120087.6 discloses lead alloy and its application and a manufacturing method, which uses a vacuum hydrogen protective atmosphere to produce a lead-rare earth master alloy. Chinese patent 200910077763.5 discloses a lead alloy and the application and production method of the lead alloy. The method uses a lead-rare earth master alloy to produce a lead-calcium rare earth alloy. The disadvantages of the above two methods are that the production process is complicated, the calculation of ingredients is troublesome, and the production cost is high
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Embodiment 1
[0022] Ingredients: electric lead 1260kg, metallic calcium chips 1.65kg, rare earth (RE) 0.14kg, put electric lead into an iron pot, heat and melt to 600°C, press calcium and rare earth and stir for 12min, cast ingot out of furnace, mechanical stirring speed 120r .p.m, sampling test results (wt%): Ca: 0.119%, RE: 0.01%, utilization rates of Ca and RE: 91%, 90%, respectively.
Embodiment 2
[0024] Ingredients: 1250kg electric lead, 1.65kg metal calcium scraps, 1.565kg rare earth protective agent (aluminum alloy) 1.3kg, put electric lead into an iron pot, heat and melt to 650°C, stir lead liquid, add protective agent (Al alloy ) was melted, pressed calcium and rare earth were stirred for 15 minutes, and the ingot was cast out of the furnace, the mechanical stirring speed was 120r.pm, the sampling test results (wt%): Ca: 0.121%, RE: 0.1%, Al: 0.036%, the utilization of Ca, RE and Al Rates were 93%, 80%, 40%.
Embodiment 3
[0026] Ingredients: electric lead 1261kg, metal calcium scraps 1.8kg, metal tin 8kg, rare earth 2.967kg, put the electric lead into an iron pot, heat and melt to 580°C, stir the lead liquid, add metal tin, add calcium, rare earth and stir The ingot was cast in 10 minutes, the mechanical stirring speed was 120r.pm, the sampling test results (wt%): Ca: 0.128%, Sn: 0.6%, RE: 0.2%, the utilization rate of Ca, Sn and RE were 89%, 95% respectively , 85%.
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Abstract
The invention discloses a direct production method for a lead calcium rare earth alloy. The method is characterized by comprising the following steps of: A, putting lead ingots into an open iron pot, and heating to smelt the lead ingots into liquid lead; B, putting the needed metal calcium and rare earth into an iron bell jar; C, arranging the bell jar in the step B on an end part of a stirrer shaft, stirring the liquid lead and rapidly mixing the calcium and rare earth in the bell jar so as to prepare lead calcium rare earth alloy liquid in the liquid lead; and D, casting the lead calcium rare earth alloy liquid produced in the step C into ingots so as to prepare the lead calcium rare earth alloy ingot products, wherein the needed metal calcium and rare earth in the steps B and C are rapidly thrown into the whirlpool of the stirred liquid lead so as to prepare lead calcium rare earth alloy liquid. The method is mainly used for directly producing the lead calcium rare earth alloy.
Description
technical field [0001] The invention relates to a direct production method of an alloy, in particular to a direct production method of a lead-calcium rare earth alloy. Background technique [0002] Lead-calcium rare-earth alloy has high hydrogen evolution and oxygen evolution overpotential, lead-calcium rare-earth alloy grid lead-acid battery has less gas evolution and less water loss, and has excellent maintenance-free performance, good low-temperature start-up performance and deep discharge cycle life. This alloy is used to replace the current popular Pb-Sb-Cd alloy for the positive grid of electric vehicle batteries, which not only eliminates the serious "cadmium" environmental pollution problem in the production and use of electric vehicle batteries, especially electric bicycle batteries, but also solves the problem of The lead-calcium-tin alloy positive electrode grid has problems such as deep discharge cycle life, maintenance-free, corrosion resistance, mechanical prop...
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