High-strength binder for dust material recycling and ball pressing

Abstract

The invention discloses a high-strength binder for dust material recycling and ball pressing. The binder is prepared from the following raw materials of sodium metasilicate, sodium metasilicate nonahydrate, magnesium chloride hexahydrate and yellow dextrin according to a proportion of 65 to 15 to 10 to10 in parts by weight. In order to guarantee the strength of the binder, the sodium metasilicate, the sodium metasilicate nonahydrate, the magnesium chloride hexahydrate and the yellow dextrin which are used as the raw materials are required to meet the industrial standard. During use, add the raw materials which account for 2-4% of the gross weight of a ball pressing raw material (dust waste), add water to blend the raw materials into a semi-humid state, and then send the mixture into a ball press machine to make a ball. The high-strength binder has the advantages that the raw materials are easy to obtain, the cost is lower, the preparation method is simple, the four chemical raw materials can be prepared into an inorganic binder (inorganic salt substance) by simply compounding and evenly blending in proportion, the bonding strength is high, the combustion does not occur, the volatile substance is not contained, and the cost is low.

Description

technical field [0001] The invention relates to a binding agent, in particular to a high-strength binding agent used for dust material recovery pressing balls. Background technique [0002] Steel mills, mines, and smelters will produce a large amount of iron ore powder, manganese ore powder, fluorite ore powder, alumina ore powder, coal dust powder, refractory materials, dust bag materials, and dust removal ash and decontamination during the production process. Mud, de-S dry ash, wet sludge, iron moor and other dusty wastes. In order to reuse these wastes, they are generally collected by classification, and after adding a binder, one or several kinds of powders are synthesized and pressed into balls to avoid dust pollution, easy to carry, and then replace the raw materials for secondary use or downgrade Use it for other purposes, such as cement industry, building materials industry, power plants, etc. Most of the currently used binders are synthetic organic binders, which ...

AI Technical Summary

Problems solved by technology

At present, most of the binders used are synthetic organic binders, which contain toxic and harmful gases such as benzene and aldehydes, which are harmful to the human body. After being added to the furnace, they burn with an odor and pollute the air.