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Casting green sand, environment-friendly carbonaceous additive and preparation process of environment-friendly carbonaceous additive

An environmentally friendly, additive technology

Active Publication Date: 2021-07-06
杭州洁铸科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, one of the purposes of the present disclosure is to provide an environmentally friendly carbonaceous additive to solve the problems of high cost and harm to the environment and human body in casting using existing carbonaceous additives

Method used

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  • Casting green sand, environment-friendly carbonaceous additive and preparation process of environment-friendly carbonaceous additive
  • Casting green sand, environment-friendly carbonaceous additive and preparation process of environment-friendly carbonaceous additive
  • Casting green sand, environment-friendly carbonaceous additive and preparation process of environment-friendly carbonaceous additive

Examples

Experimental program
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Effect test

preparation example Construction

[0040] According to an exemplary embodiment of another aspect of the present disclosure, there is provided a method for preparing the above-mentioned environmentally friendly carbonaceous additive for foundry green sand, the preparation method comprising: adding microcrystalline graphite, titanium slag extract, and gas The slag raw material is ground and passed through a 200-mesh sieve, and the mass ratio is 60-80: 0-20: 0-20, for example (61-79): (1-19): (1-19), and for example (70 ~75): (5~15): (5~15), weigh the finely ground raw materials and place them in a mixer, stir and mix them evenly to obtain an environmentally friendly carbonaceous additive for casting green sand.

[0041] According to another exemplary embodiment of the present disclosure, there is provided a casting green sand, characterized in that the casting green sand comprises 100 parts by mass of quartz sand, 8-10 parts by mass of sodium bentonite and 3-7 parts by mass of Environmentally friendly carbonaceou...

example 1

[0045] The "carbon" in microcrystalline graphite, titanium extraction slag and coal gasification slag are pretreated to obtain 200 mesh (particle size<75μm) microcrystalline graphite, titanium extraction slag extract and coal gasification slag powder; The proportion is 80:0:20. The powder is weighed and placed in a mixer to stir and mix evenly to obtain the environmentally friendly carbonaceous additive for foundry green sand.

[0046] With the quartz sand (70 / 140 mesh) mass fraction as 100, the mass fraction of sodium bentonite as 8, the mass fraction of the prepared foundry green sand with environment-friendly carbonaceous additive is 5, will successively weigh the The material is put into the roller type sand mixer for sand mixing, and the compactness rate of the sample is controlled at 45±2%, and a 50mm±1% cylindrical sample and a 30mm±1% strip sample are made by a hammer sample making machine. sample and test its performance.

[0047] The mass percent content of the mine...

example 2

[0049] Microcrystalline graphite, titanium extraction slag extract and coal gasification slag are pretreated to obtain 200 mesh (particle size<75 μm) microcrystalline graphite, titanium extraction slag extract and coal gasification slag powder respectively; the mass percentage is 80 : The ratio of 10:10 weighs the powder and puts it in a mixer to stir and mix evenly to obtain the environmentally friendly carbonaceous additive for foundry green sand.

[0050] With the quartz sand (70 / 140 mesh) mass fraction as 100, the mass fraction of sodium bentonite as 10, the mass fraction of the prepared foundry green sand with environment-friendly carbonaceous additive is 5, will successively weigh the The material is put into the vertical flat mouth sand mixer for sand mixing, and the compactness rate of the sample is controlled at 45±2%, and the cylindrical sample of 50mm±1% and the bar shape of 30mm±1% are made by the hammer sample making machine Samples to test their related propertie...

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Abstract

The invention provides casting green sand, an environment-friendly carbonaceous additive and a preparation process of the environment-friendly carbonaceous additive. The environment-friendly additive comprises microcrystalline graphite, an extracted titanium slag extract and coal gasification slag, wherein the microcrystalline graphite accounts for 60-80% by mass, the extracted titanium slag extract accounts for 0-20% by mass, the coal gasification slag accounts for 0-20% by mass, and the extracted titanium slag extract is obtained by flotation of extracted titanium slag and contains 40-60% by mass of fixed carbon; the casting green sand comprises 100 parts by mass of quartz sand, 8-10 parts by mass of sodium bentonite and 3-7 parts by mass of the environment-friendly carbonaceous additive. The raw materials comprise the titanium extraction slag extract and the coal gasification slag, waste recycling can be achieved, and the cost is low; harmful gas released at high temperature is remarkably reduced, and environmental harm is reduced; the low thermal expansion rate is achieved, and casting deformation can be effectively reduced; the binding force between a binder and the quartz sand can be obviously improved, and the wet compression strength is improved.

Description

technical field [0001] The present disclosure relates to the field of carbon materials and environmental protection, in particular, to an environment-friendly carbonaceous additive for casting green sand, a preparation process of the environment-friendly carbonaceous additive for casting green sand, including the environment-friendly carbonaceous additive for casting green sand Additive foundry green sand and method for preparation of foundry green sand samples. Background technique [0002] Carbonaceous additive is an important part of casting green sand. Its function is to prevent sand sticking and porosity on the surface of castings, and make the surface of castings smooth. In traditional green sand casting, coal powder is generally added to improve the quality of the casting. But pulverized coal has the following defects: [0003] (1) Since pulverized coal is processed from industrial coal, and industrial coal is a very important energy source, and pulverized coal has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02B22C1/08B22C9/02
CPCB22C1/02B22C1/08B22C9/02Y02P10/20
Inventor 彭同江孙红娟秦亚婷
Owner 杭州洁铸科技有限公司
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