The production method of pearl sand

A production method, the technology of pearl sand, applied in the field of foundry sand, can solve the problems of heavy environmental pollution, easy to break when heated, etc., and achieve the effects of improving the working environment, reducing foundry waste, and high recycling rate

Active Publication Date: 2019-02-22
LUOYANG KAI LIN CASTING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a production method of pearl sand, which solves the problems of the prior art foundry sand that pollutes the environment and is easily broken when heated

Method used

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  • The production method of pearl sand
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  • The production method of pearl sand

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A production method of pearl sand, comprising material selection, high-temperature melting, granulation, and screening, wherein,

[0033] Material selection: choose aluminum ore with a mass fraction of aluminum oxide above 60%;

[0034] High-temperature melting: adding the aluminum ore to an electric arc furnace, heating the aluminum ore to above 2000 degrees Celsius to melt;

[0035] Granulation: Apply air pressure to the molten liquid flowing out of the electric arc furnace to crush and cool the liquid raw material to obtain coarse pearl sand;

[0036] Sieving: Sieve the coarse pearl sand according to the particle size to obtain the pearl sand product.

[0037] By controlling the air pressure, the liquid raw material is crushed and cooled by strong wind to obtain spherical or nearly spherical sand particles with smooth surface.

Embodiment 2

[0039] The present embodiment further defines on the basis of embodiment 1: figure 1 It is the electric arc furnace used in this embodiment. The electric arc furnace uses three-phase alternating current as the power supply. The top of the furnace chamber 1 of the electric arc furnace is open, and the bottom side wall is provided with a liquid outlet 2. There are three holes in the furnace chamber 1 that pass through the furnace chamber. 1 side wall and vertically arranged electrodes 3, the electrodes 3 are all electrically connected to the power supply, compared with the traditional horizontally arranged electrodes 3, the heating volume is larger, which is conducive to the full mixing of materials in the furnace cavity 1, and the obtained pearls The physical and chemical properties of sand products are more uniform, less affected by the differences in the raw material composition of each batch of aluminum ore.

Embodiment 3

[0041] This embodiment is further defined on the basis of Embodiment 2: the projection of the three electrodes 3 on the horizontal plane is triangular, the top of the electrodes 3 is located at 1 / 2-2 / 3 of the height of the furnace cavity 1, and the bottom is higher than Bottom of furnace chamber 1. The electrode 3 is located below the liquid level of the furnace chamber 1 to heat the molten aluminum ore. There is a cylinder on the upper part of the furnace chamber 1 to enter the solid aluminum ore of Lu Qiang for preheating.

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Abstract

The invention discloses a production method for ceramsite. The production method includes the steps that aluminum ore is selected, wherein the mass fraction of aluminum oxide of the aluminum ore is 60% or higher; the aluminum ore is added into an electric arc furnace, and the aluminum ore is heated to 2000 DEG C or above to be melted; air pressure is applied to molten liquid flowing out of the electric arc furnace, liquid raw materials are broken and cooled, and rough ceramsite is obtained; and the rough ceramsite is screened according to the particle size, and a ceramsite product is obtained. The fire-resistant temperature of the ceramsite obtained through the method is larger than 1800 DEG C; the appearance of the ceramsite is in the shape similar to balls, very good liquidity and filling performance are achieved, economical efficiency is achieved, and a cast mold is not likely to be damaged after casting; casting defects generated due to molding sand expansion can be prevented, and the size precision of a complex casting can be improved; properties of high strength and low breakage are achieved, the recycling rate is high, and the dust amount is very small; and compared with chromite sand and zircon sand, the price is low.

Description

technical field [0001] The invention relates to foundry sand, in particular to a production method of pearl sand. Background technique [0002] Casting is an ancient traditional manufacturing industry in China. It has always been a sector that seriously pollutes the environment, and has also formed a bad reputation among the people. In foundry production, the input of materials and energy accounts for 55%-70% of the output value. The total amount of sewage discharged by my country's foundry industry every year is: 3 million tons of waste residue, 16.5 million tons of waste sand and 11 billion cubic meters of waste gas. At present, the artificial foundry sand used in large quantities is mainly produced from natural silica sand or artificially crushed silica sand. They are easily broken during the molding and pouring process, becoming garbage, polluting the environment, and endangering the health of production workers (silica dust is prone to silicosis. ), for sand casting, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 刘满对王柏勤
Owner LUOYANG KAI LIN CASTING MATERIALS CO LTD
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