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A kind of preparation method of drainage sand for alloy steel

A technology for drainage sand and alloy steel, which is applied in metal processing equipment, manufacturing tools, casting equipment, etc., can solve the problems that the ladle is not easy to open automatically and the refractoriness of drainage sand is not high, and achieves the effect of easy acquisition and low cost.

Active Publication Date: 2019-03-15
深圳市新元特钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the refractoriness of magnesia drainage sand is not high, and the ladle is not easy to be poured automatically under the conditions of higher tapping temperature and longer ladle transfer time. The screened olivine waste powder ore, anthracite and other materials are mixed and ball milled, put into a mold for pressing to obtain a rough billet, and then calcined at a high temperature to obtain forsterite sand of various particle sizes, and then mix it with carbon black , potassium feldspar and other substances are mixed to obtain the drainage sand mixture, and finally dried and screened to obtain the drainage sand for alloy steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First, put the olivine waste powder ore into the pulverizer to crush, pass through a 325 mesh sieve, weigh 4.8kg of the sieved olivine waste powder ore, mix 3.6kg of anthracite and 1.5kg of lightly burned magnesium powder QM-96, and put it into In the ball mill, ball mill at 400r / min for 50min, then add 250mL of sulfurous acid solution with a mass fraction of 1%, continue ball milling for 20min, and then discharge to obtain a mixed material; put the above mixed material into a mold, press at 10MPa for 8min, and then Transfer to an oven, dry at 120°C for 24 hours to obtain a rough billet, place the rough billet in a high-temperature calciner, calcinate at 1480°C for 3 hours, cool down to room temperature with the furnace, discharge the material and put it into a pulverizer for crushing, and then Transfer to the vibrating screen machine, screen out the powders with particle diameters of 1.70mm, 0.850mm, 0.425mm, and 0.25mm respectively to obtain forsterite sands with vario...

example 2

[0019] Firstly, put the olivine waste powder ore into the pulverizer and crush it, pass through a 325 mesh sieve, weigh 4.5kg of the sieved olivine waste powder ore, mix 3.0kg of anthracite and 1.2kg of lightly burned magnesium powder QM-96, and put it into In the ball mill, ball mill at 300r / min for 30min, then add 150mL of sulfurous acid solution with a mass fraction of 1%, continue ball milling for 15min, and then discharge the material to obtain the mixed material; put the above mixed material into a mold, press it at 5MPa for 5min, and then Transfer to an oven, dry at 110°C for 20 hours to obtain a rough billet, place the rough billet in a high-temperature calciner, calcinate at 1350°C for 2 hours, cool to room temperature with the furnace, discharge the material and put it into a pulverizer for crushing, then Transfer to the vibrating screen machine, screen out the powders with particle diameters of 0.85mm, 0.425mm, 0.250mm, and 0.15mm respectively to obtain forsterite sa...

example 3

[0022]First, put the olivine waste powder ore into the pulverizer to crush, pass through a 325 mesh sieve, weigh 4.7kg of the sieved olivine waste powder ore, mix 3.5kg of anthracite and 1.3kg of lightly burned magnesium powder QM-96, and put it into In a ball mill, mill at 350r / min for 40min, then add 200mL of sulfurous acid solution with a mass fraction of 1%, continue to mill for 17min, and then discharge to obtain a mixed material; put the above mixed material into a mold, press it at 7MPa for 7min, and then Transfer to an oven, dry at 115°C for 22 hours to obtain a rough billet, place the rough billet in a high-temperature calciner, calcinate at 1440°C for 3 hours, cool down to room temperature with the furnace, discharge the material and put it into a pulverizer for crushing, and then Transfer to vibrating sieve machine, screen out the powders with particle diameters of 1.2mm, 0.521mm, 0.321mm, and 0.24mm respectively to obtain forsterite sands with various particle sizes...

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Abstract

The invention relates to a preparation method for flow guiding sand used for alloy steel and belongs to the technical field of preparation of flow guiding sand. According to the preparation method, firstly, after being subjected to mixed ball milling, sieved olivine waste powder ore, anthracite and other substances are contained into a mold to be pressed, a rough blank is obtained and then is subjected to high temperature calcination, forsterite sand in various levels of particle sizes is obtained, and then is mixed with carbon black, potassium feldspar and other substances, and a flow guiding sand mixture is obtained; and finally, the flow guiding sand mixture is dried and screened, and then the flow guiding sand used for the alloy steel can be obtained. The refractoriness of the flow guiding sand, prepared through the preparation method, used for the alloy steel reaches 1850 DEG C or above, and the automatic casting starting success rate reaches 97-98%; and the raw materials are easy to obtain, cost is low, and the flow guiding sand used for the alloy steel can be widely applied in molten steel casting.

Description

technical field [0001] The invention relates to a method for preparing drainage sand for alloy steel, and belongs to the technical field of drainage sand preparation. Background technique [0002] The mechanism of the drainage sand is that the upper surface of the drainage sand filled in the ladle nozzle produces a thinner sintered layer under the heat of molten steel to form a "shell". Once the slide plate is opened, most of the unsintered sand bodies in the nozzle will Falling freely, at the same time, the "shell" is crushed by the static pressure of the molten steel, and the molten steel flows out automatically. The quality of the drainage sand mainly depends on its material, particle size, flowability, sintering performance and thermal expansion performance. The better the fluidity of the drainage sand, the higher the self-opening rate of the ladle; and for the sintering performance of the drainage sand, it is hoped that the material surface can be light. high-degree si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/20B22D41/44
CPCB22D41/44C04B35/20C04B35/66C04B2235/3217C04B2235/3472C04B2235/424
Inventor 许斌薛荣飞宋豪
Owner 深圳市新元特钢有限公司