Method for preparing refining agent from egg shell carrier

A technology of egg shell and refining agent, applied in the field of refining agent preparation, can solve the problems of good chemical stability of refining agent, low ability to absorb inclusions, affecting the performance of alloy castings, etc., to achieve waste utilization, strong impurity removal ability, The effect of low power consumption

Inactive Publication Date: 2016-11-09
陈建峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: in the process of preparing the refining agent in the current conventional production process, the ability to absorb inclusions is not high, and the cost is high, and the porosity in the produced alloy casting is relatively high, and the surface of the casting Many pores will be generated, and the proportion of oxidized impurities is also high, which affects the performance of alloy castings. A method is provided that uses egg shell as a carrier, first treats its surface and then carbonizes it. Put the carbonized egg shell into chlorine Potassium Chloride, Magnesium Chloride, Sodium Sulfate, Zinc Chloride, Sodium Nitrate Soaking and Adsorbing, Drying with Solution After Adsorption, Mixing Ball Milling with Calcium Fluoride, Pyrophyllite, Diatomite, Fly Ash and Rare Earth A method for obtaining a refining agent. In this method, the refining agent adjuvant absorbed by egg shells can not only improve the stability of the adjuvant, but also have a high ability to absorb inclusions in the egg shell, and the cost is low, and the obtained refining agent has good chemical stability. Good slagging performance, strong degassing and impurity removal capabilities, and broad market prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] First, weigh 150g of egg shells, clean the surface and inner wall of the egg shells, and then dry them in the sun. Crush the dried egg shells and sieve them to obtain 40-mesh egg shell particles. Soak in 1% hydrochloric acid for 5 minutes, take it out immediately after soaking, put it into a 15% sodium chloride solution and soak it for 3 hours, filter it out after soaking, put the filter residue in an oven and dry it for 5 hours; then put the above dried Egg shells were pyrolyzed at 1.3MPa and 280°C for 20 minutes, and the pyrolyzed egg shells were put into a carbonization furnace, and nitrogen was introduced into the carbonization furnace for protection, and the temperature was raised to 800°C at a rate of 10°C / min. Carbonize at this temperature for 50 minutes to obtain carbonized egg shells, which are reserved for later use; then select 15g potassium chloride, 10g magnesium chloride, 5g sodium sulfate, 6g zinc chloride, 8g sodium nitrate and 250mL deionized water respe...

example 2

[0022]First, weigh 180g of egg shells, clean the surface and inner wall of the egg shells and dry them in the sun. Crush the dried egg shells and sieve them to obtain 45-mesh egg shell particles. Soak in 1% hydrochloric acid for 7 minutes, take it out immediately after soaking, put it in a 15% sodium chloride solution and soak it for 4 hours, filter and take it out after soaking, put the filter residue in an oven and dry it for 6 hours; then put the above dried Egg shells were pyrolyzed at 1.35MPa and 290°C for 25 minutes, and the pyrolyzed egg shells were put into a carbonization furnace, and nitrogen was introduced into the carbonization furnace for protection, and the temperature was raised to 850°C at a rate of 11°C / min. Carbonize at this temperature for 60 minutes to obtain carbonized egg shells, which are reserved for later use; then select 16g potassium chloride, 11g magnesium chloride, 7g sodium sulfate, 7g zinc chloride, 9g sodium nitrate and 280mL deionized water resp...

example 3

[0025] First, weigh 200g of egg shells, clean the surface and inner wall of the egg shells, and then dry them in the sun. Crush the dried egg shells and sieve them to obtain 50-mesh egg shell particles. Soak in 1% hydrochloric acid for 8 minutes, take it out immediately after soaking, put it in a 15% sodium chloride solution and soak it for 5 hours, filter it out after soaking, put the filter residue in an oven and dry it for 7 hours; then put the dried Egg shells were pyrolyzed at 1.4MPa and 300°C for 30 minutes, and the pyrolyzed egg shells were put into a carbonization furnace, and nitrogen was introduced into the carbonization furnace for protection, and the temperature was raised to 900°C at a rate of 12°C / min. Carbonize at this temperature for 70 minutes to obtain carbonized egg shells, and keep them for later use; then select 18g potassium chloride, 12g magnesium chloride, 8g sodium sulfate, 8g zinc chloride, 10g sodium nitrate and 300mL deionized water, stir and mix unt...

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Abstract

The invention discloses a method for preparing a refining agent from an egg shell carrier, and belongs to the technical field of preparation of refining agents. The method comprises the following steps that an egg shell is used as a carrier, the egg shell is carbonized after the surface of the egg shell is processed, the carbonized egg shell is put in a solution containing potassium chloride, magnesium chloride, sodium sulfate, zinc chloride and sodium nitrate to be soaked and adsorbed, the adsorbed egg shell and the solution are dried, and the dried material, calcium fluoride, pyrophyllite, diatomaceous earth, pulverized fuel ash and rare earth are mixed, and the mixture is ball-milled to obtain the refining agent. The stability of a refining agent additive obtained after the egg shell is adsorbed can be improved. The inclusion adsorbing capability of the egg shell is high, the cost is low, the prepared refining agent is high in chemical stability, the slagging performance is high, the gas and inclusion removing capability is high, and the method has a wide market prospect.

Description

technical field [0001] The invention discloses a method for preparing a refining agent by using an egg shell carrier, and belongs to the technical field of refining agent preparation. Background technique [0002] As we all know, with the intensification of competition in the aluminum alloy processing industry, in order to reduce costs, the proportion of recycled materials in raw materials is also increasing during casting, and even some recycled materials with high content of oxidized impurities are often used, but , because in the process of producing aluminum alloy, when the aluminum alloy melt is solidified, hydrogen molecules formed by hydrogen atoms in the aluminum liquid will form bubbles with non-metallic inclusions, and most of the impurities and gases in the aluminum liquid come from The application of recycled materials, that is, the application of recycled materials greatly increases the content of oxidized impurities in molten aluminum, resulting in certain defe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/02C22C21/00
CPCC22C1/06C22C1/026C22C21/00
Inventor 陈建峰王统军张明
Owner 陈建峰
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