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Sodium silicate foundry used sand organism regenerating method and device

A technology of biological regeneration and water glass, which is applied in the direction of casting molding equipment, manufacturing tools, cleaning/processing machinery of casting materials, etc., can solve the problems of high energy consumption, waste of molding sand resources, waste of soluble water glass, etc., and achieve treatment Low cost, saving natural effect

Inactive Publication Date: 2018-03-13
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Looking at the current research status of water glass used sand treatment at home and abroad, it can be found that in terms of comprehensive utilization of water glass used sand, the use of sintering method to convert water glass used sand into water glass, white carbon black, building materials and other products not only consumes high energy , and will waste the already scarce molding sand resources, especially the preparation of building materials, and waste the soluble water glass that can be reused in the old water glass sand

Method used

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  • Sodium silicate foundry used sand organism regenerating method and device

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Experimental program
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Effect test

Embodiment 1

[0048] Add 0.12g NaNO to 1L water 3 , 0.084gK 2 HPO 4 , 0.07gMgSO 4 , 0.02gCaCl 2 , 0.088gKH 2 PO 4 , 0.0002gMnSO 4 Prepare microalgae culture medium, take 1L of microalgae culture medium and add 500g of old water glass sand, set a cage filter 8 in the supernatant, and remove Astrospira, Melosira, Navicula, Sterculia, and small A microalgae community composed of Cyclotella, Cynocodinium, Aspergillus, Cylindrica, Skeletonema, etc. is put in the cage filter 8, and the microalgae-containing community, cage filter, culture medium, water The incubator 6 of old glass sand is placed in the sunlight, the aerator 1 is placed in the water body to make the water flow, and the heat pump 9 is also placed in the water body for heating in winter to ensure that the temperature is between 10-20°C. Carry out large-scale microalgae culture under the above conditions. When the de-filming rate of the old sodium silicate sand exceeds 95%, the culture is stopped, the cage filter 8 is taken out, and th...

Embodiment 2

[0050] Add 0.12g NaNO to 1L water 3 , 0.084gK 2 HPO 4 , 0.07gMgSO 4 , 0.02gCaCl 2 , 0.088gKH 2 PO 4 , 0.0002gMnSO 4 Prepare microalgae culture medium, take 1L of microalgae culture medium and add 1000g of old water glass sand, set a cage filter 8 in the supernatant, and remove Astrospira, Melosira, Navicula, Sterculia, and small A microalgae community composed of Cyclotella, Cynocodinium, Aspergillus, Cylindrica, Skeletonema, etc. is put in the cage filter 8, and the microalgae-containing community, cage filter, culture medium, water The incubator 6 of old glass sand is placed under sunlight 7, and the aerator 1 is placed in the water body to make the water body flow. The water body can be kept above 5℃ in spring, summer and autumn, and it can be carried out under the above conditions without heating. For microalgae culture, when the de-filming rate of the old sodium silicate sand exceeds 95%, the culture is stopped, and the cage filter 8 is taken out. After the old sodium silic...

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Abstract

The invention relates to a sodium silicate foundry used sand organism regenerating method and device. The method includes the following steps that firstly, by weight, 0.00002-0.005 part of a nitrogensource, 0.0000025-0.00003 part of a phosphorus source, 0.00002-0.005 part of a potassium source and 0.00001-0.003 part of a magnesium source are added into 100 part of water, and a microalgae culturemedium is obtained; secondly, sodium silicate foundry used sand is added into the microalgae culture medium, and a cage-shaped filter in which microalgae communities are placed is arranged in supernatant liquid; thirdly, mixed water is placed under a proper temperature to be subjected to microalgae culturing; and fourthly, the membrane removing rate of the sodium silicate foundry used sand is monitored, and when the membrane removing rate exceeds 90%, it is only needed to dry the sodium silicate foundry used sand. According to the sodium silicate foundry used sand organism regenerating methodand device, suspended microalgae species facilitating water bloom are used for consuming lots of a residual adhering agent on the surface of the sodium silicate foundry used sand, and double recyclingof foundry used sand and sodium silicate is achieved.

Description

Technical field [0001] The invention belongs to a method for recycling metal casting materials, and in particular relates to a method and device for biological regeneration of sodium silicate casting used sand. Background technique [0002] The sodium silicate sand casting process has the advantages of high strength, low cost, simple process, and environmental friendliness. The sodium silicate sand casting process has been widely used since it was introduced to my country through the Soviet Union in the 1960s and is the most promising in the 21st century. Of green styling materials. However, it is difficult to regenerate old water glass sand and has poor collapsibility. It has been plagued by foundry workers for decades and is regarded as one of the world's problems in the foundry industry. In many foundry factories or workshops in our country, the discarded sodium silicate and old sand are still piled up like a mountain, causing great pollution to the environment and a great was...

Claims

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Application Information

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IPC IPC(8): B22C5/00
CPCB22C5/00
Inventor 汪华方冯浩文徐雨哲孙洁段凌陈卓卢记军龚文邦
Owner WUHAN TEXTILE UNIV