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Cold-pressed pellet composite binder and method for forming smelting slag

A technology of cold-pressed pellets and binders, which is applied in the field of cold-pressed pellets composite binders and smelting slag molding, which can solve the problems of lower grades of finished pellets, low compressive strength of pellets, low pyrolysis temperature, etc. question

Active Publication Date: 2018-08-21
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large addition of a single inorganic binder, the grade of the finished pellets will decrease and the compressive strength of the pellets will be low; while the pellets prepared by a single organic binder are prone to bursting and pulverization at high temperatures, which cannot Meet the requirements of subsequent processing of pellets
Therefore, it is very important to choose a suitable composite binder to solve the problems of low compressive strength, low pyrolysis temperature, high cost, and difficulty in controlling and mixing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A cold-pressed composite pellet binder, mainly composed of starch, iron-containing sludge, cement, sodium hydroxide and other components; wherein the composition percentages of starch, iron-containing sludge and cement are respectively: 15%, 35%, 49% %, 1%; wherein, the starch can be corn starch, potato starch, kudzu starch, tapioca starch, sweet potato starch, potato starch and the like.

[0047] The method of using the composite binder is as follows: take a certain amount of smelting slag, add a composite binder accounting for 5% of the slag mass, and add water accounting for 10% of the slag mass, and mix and stir for 15 minutes; The mixture is cooled and left to stand for 10 minutes; finally, the mixed material is put into the molding equipment for compression molding. The molding machine pressure was set at 11MPa. The drop strength of the prepared smelting slag pellets is ≥5 times / ball, the compressive strength is ≥300N / ball, the drop strength after drying is ≥20 t...

Embodiment 2

[0049] A cold-pressed composite pellet binder, mainly composed of starch, iron-containing sludge, cement, sodium hydroxide and other components; wherein the composition percentages of starch, iron-containing sludge and cement are respectively: 20%, 40%, 38% %, 2%; wherein, the starch can be corn starch, potato starch, kudzu starch, tapioca starch, sweet potato starch, potato starch and the like.

[0050] The method of using the composite binder is as follows: take a certain amount of smelting slag, add a composite binder accounting for 10% of the mass of the slag, and add water accounting for 20% of the mass of the slag, and mix and stir for 20 minutes; The mixture is cooled and left to stand for 10 minutes; finally, the mixed material is put into the molding equipment for compression molding. The molding machine pressure is set to 13MPa. The drop strength of the prepared smelting slag pellets is ≥5 times / ball, the compressive strength is ≥300N / ball, the drop strength after d...

Embodiment 3

[0052] A cold-pressed composite pellet binder, mainly composed of starch, iron-containing sludge, cement, sodium hydroxide and other components; wherein the composition percentages of starch, iron-containing sludge and cement are respectively: 29%, 54%, 14% %, 3%; wherein, the starch can be corn starch, potato starch, kudzu starch, tapioca starch, sweet potato starch, potato starch and the like.

[0053] The method of using the composite binder is as follows: take a certain amount of smelting slag, add a composite binder accounting for 15% of the mass of the slag, and add water accounting for 10% of the mass of the slag, and mix and stir for 15 minutes; The mixture is cooled and left to stand for 6 minutes; finally, the mixture is put into the molding equipment for compression molding. The molding machine pressure is set to 14MPa. The drop strength of the prepared smelting slag pellets is ≥5 times / ball, the compressive strength is ≥300N / ball, the drop strength after drying is...

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Abstract

The invention provides a cold-pressed pellet composite binder and a method for smelting slag forming. The cold-pressed pellet composite binder comprises 10-35wt% of starch, 30-60wt% of iron-containing oil sludge, 10-50wt% of cement, and 1-5wt% of sodium hydroxide. The cold-pressed pellet composite binder has the advantages of being low in cost, easy to operate and low in inorganic substance content, is especially suitable for cold press forming of smelting slag, the fall strength of smelting slag pellets prepared through the cold-pressed pellet composite binder can reach 5 times / pellet or above, and the compressive strength of the smelting slag pellets can reach 300 N / pellet or above.

Description

technical field [0001] The invention belongs to the field of binder, in particular, the invention relates to a cold-pressed pellet composite binder and a method for forming smelting slag. Background technique [0002] As a new type of environmental protection and energy-saving furnace charge, cold-set pellets can effectively improve the metallurgical properties of the material, and it is also an important way to reuse waste resources. Binder is one of the main technical keys in mineral powder cold pressing and medium and low pressure forming processes. Due to the large addition of a single inorganic binder, the grade of the finished pellets will decrease and the compressive strength of the pellets will be low; while the pellets prepared by a single organic binder are prone to bursting and pulverization at high temperatures, which cannot Meet the requirements of subsequent processing of pellets. Therefore, it is very important to choose a suitable composite binder to solve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/242C22B1/248
CPCC22B1/242C22B1/248
Inventor 夏碧华邓鑫吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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