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Heat-preservation slag collecting agent

A technology of slag collecting agent and perlite, which is applied in the field of molding sand production, can solve the problems of perlite sandwiching, prolonging time, flowing into the cavity, etc., and achieves the effect of good heat resistance and heat preservation, reduction of iron loss and improvement of quality.

Inactive Publication Date: 2016-10-26
HEFEI CITY TENVER PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the time is prolonged, the moisture in the free particles will expand violently, resulting in bouncing phenomenon, and it will easily flow into the cavity with molten iron during pouring
The production of ductile iron parts mostly adopts an open pouring system, so castings are prone to produce perlite defects

Method used

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Examples

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Effect test

Embodiment Construction

[0020] A thermal insulation and slag collecting agent, made of the following ingredients in parts by weight, clay 5, modified perlite 38, straw ash 8, sepiolite powder 6, mullite powder 3, hollow glass microsphere powder 7, pyrophyllite powder 3. Palygorskite powder 2;

[0021] The modified perlite is made of the following components in parts by weight: perlite 45, sodium lauryl sulfate 0.6, sodium citrate 1.1, sorbitol 2, ethyl silicate 1, glycerol 1, amyl Diacid 0.8, sodium silicate 1; its preparation method is: ① Mix sorbitol and ethyl silicate evenly, heat in a water bath, control the temperature to 35°C, and keep for 5 minutes; ② Mix perlite, citric acid Mix sodium and glycerol evenly together, heat to 65°C, keep warm for 10 minutes, and cool to room temperature to obtain mixture 1; ③ Mix glutaric acid, sodium silicate, sorbitol and ethyl silicate in ① evenly Mix together, heat to 52°C, and after 10 minutes, cool to room temperature to obtain mixture 2; ④ Add mixture 1 i...

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PUM

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Abstract

The invention discloses a heat-preservation slag collecting agent which is prepared from clay, modified perlite, straw ash, sepiolite powder, mullite powder, hollow glass bead powder, pyrophyllite powder and palygorskite powder. The slag collecting agent is good in spreadability and resistant to high temperature, has good heat-resisting and heat-preservation effects, enables the nodulizing process to be stable, is high in deslagging rate and does not affect molten iron ingredients; iron slag is brittle after being cooled and convenient to recover, and molten iron loss can be reduced; and the slag state after removal can be changed, the amount of molten iron slag entering a converter is reduced, the molten iron resulfurization phenomenon is reduced, the average iron loss is lowered by 45%, and the average molten iron sulfur content after removal is about 0.0068%.

Description

technical field [0001] The invention relates to the field of molding sand production, in particular to a thermal insulation slag collector. Background technique [0002] Ductile cast iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. It is based on its excellent performance that it has been successfully used to cast some complex stress, strength, toughness, and wear resistance. Parts with high performance requirements. Spheroidal graphite is obtained through spheroidization and inoculation treatment in the production process, which effectively improves the mechanical properties of cast iron, and at the same time improves plasticity and toughness. However, the source of raw materials contains a large amount of sulfur, which affects the spheroidization process of graphite during production. Directly using a slag rake for slag removal will not only affect the quality of the obtained ductile iron, but also...

Claims

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Application Information

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IPC IPC(8): C21C1/10C21C7/064C21C7/076
CPCC21C1/10C21C7/0037C21C7/0087C21C7/0645Y02P10/20
Inventor 孙爱琴
Owner HEFEI CITY TENVER PRECISION CASTING
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