CS277490B6 - Sacking of industrial waste - Google Patents

Abstract

The purpose of the solution is the comprehensive disposal of industrial waste, the most common chemical sludges, grinding sludges and waste oil substances. The above purpose is achieved by mixing 1 vol. unit of water with 3 to 4 vol. units of chemical sludges, 3 vol. units of pulverized coal and 2 vol. units of waste oil substances. After the oil substances are absorbed, 0.5 vol. units of calcium hydrate and 10 vol. units of grinding sludges are added with constant stirring. The mixture prepared in this way is burned in a rotary kiln at a temperature of 800 to 1000 0C.

Description

1 CS 277490 B6

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a process for the disposal of industrial waste, which is suitable for the comprehensive disposal of chemical fuels, abrasive slurries and non-returnable contaminated petroleum products. There are a number of ways to dispose of industrial waste, which are characterized by the fact that they are always intended only for the disposal of some kind of chemical waste and the resulting disposal product is not always suitable for further processing as a secondary waste. Such a character is caused by the liquidation of chemical sludge, which, after pre-treatment to neutralize the toxic constituents of the sludge and blends with the combustible particulate matter, is thickened and burned. With a view to reusing waste disposal products as a secondary raw material, the most revamped disposal of abrasive sludge and powders. There are known methods such as sintering with subsequent leaching, pelletizing and filling of dried metal slices into a metal sheath. Irreversible contaminated oil is most often disposed of by incineration. In general, they are known to have the advantage of not solving the complex disposal of industrial waste, ie. as most often occur in the practice of engineering companies

The abovementioned drawbacks are largely eliminated by the method of disposal of industrial waste by sintering, consisting of chemical sludge containing heavy metals, neutralizing elements and organic impurities, abrasive sludge containing metal chips and residual abrasives heavily contaminated with cooling emulsion and oil substances containing highly worn oils lubricating greases, if need be, those scale-contaminated greases, the essence of which is that chemical opaque in a concentrated form, pretreated, for example, on a calliary, is premixed in a volume of 3 to 4 volume units with a 1 volume water unit and 3 volume units of dust coal . After thorough mixing, 2 volume units of waste oil are added to the mixture while stirring. Addition of 0.5 volumes of calcium hydrate and 10 volumes of abrasive sludge are added to the oil adsorbed while stirring. The mixture thus prepared is burned in a rotary furnace at 800 to 1000 ° C. If the chemical sludge is present in the non-densified form, i.e. as loose-loaded with a higher water content, it is premixed in a quantity of 5 to 6 volumetric units with the pulverized coal in a volume of 3 volumetric units.

The method of the invention allows for the comprehensive disposal of industrial waste without the need for special equipment. The resultant product of the disposal - granulate, does not contain residues of toxic environmentally hazardous substances and due to the high, about 50-60% iron content, the granulate is suitable for further use of steel production. Example 277 Example 1 Example 1

The chemical sludge from the moral and galvanized condensers in the chemical neutralization station containing the heavy metals, the neutralizing elements and the organic impurities is mixed in the mixer with water in the ratio of 4: 1 and the pulverized coal in a volume of 3 vol. After thorough mixing, 2 volume units of waste oil formed by a mixture of worn automated oils from chip machining on automatic turning machines and worn hydraulic oils from the operation of deep-drawing hydraulic presses are added to the mixer while mixing. After absorbing the waste oil feeds, 0.5 volumic hydrated calcium units and 10 volumetric abrasive sludge units derived from bearing sawdust and abrasive and coolant emulsion additions are added with stirring. By thorough mixing, the mixture is brought to a bulk, suitable for transport and burned in a rotary oven at min. 800 ° C. Example 2

The non-thickened chemical sludge collected in the jam-milling and galvanizing waste, containing heavy metals, neutralizing elements, organic impurities and water, is mixed with other wastes and additives in the same amounts as in Example 1 to form 5 volumes of the rotary mixer. The bulk material is suitable for transport and is burnt in a rotary furnace at a temperature of min. 800 ° C.

Industrial usability

The method of the invention is applicable to the complex disposal of industrial wastes commonly found, particularly in engineering companies.

Claims (2)

PATENT CLAIMS 1. A method for the disposal of industrial waste by sintering, consisting of lignite by thickening or loose non-concentrated chemical sludge containing heavy metals, neutralizing elements and organic impurities, abrasive sludges containing metallic tri-esters and abrasive residues strongly contaminated with coolant emulsion and oil containing highly worn oils, lubricating greases, optionally contaminated with scales and the like, characterized in that the chemical sludge in a thickened form in an amount of 3 to 4 volume units is premixed with 1 volume of water and 3 volume units of pulverized coal; to this mixture, with stirring, add 2 volume units of waste petroleum products, add 0.5 volume of calcium hydrate unit and 10 volumes of abrasive sludge while stirring the oil, the mixture thus prepared is burned in a rotary furnace p at a temperature of 800 to 1000 ° C. 2. Process according to claim 1, characterized in that the chemical sludges in the unfilled form are pre-mixed in an amount of 5 to 6 volume units with 3 volumes of pulverized coal. End of document