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Rolled oil sludge purifying method

A technology for rolling sludge and oil residue, applied in the direction of lubricating composition, etc., can solve the problems of inability to dispose of oxidized and deteriorated waste oil, acid residue and waste gas to pollute the environment, and the color of regenerated oil is dark, so as to achieve saving in dosage, low cost, and regeneration. short time effect

Inactive Publication Date: 2014-08-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents CN102657959A and CN102295982A disclose a sulfuric acid-clay method with simple technology and can produce qualified base oil, but the amount of clay used is large, equipment corrosion is serious, acid residue and waste gas pollute the environment, and it has become a method explicitly prohibited by the state; patents CN101092585A, CN101319166A, The molecular rectification process disclosed in CN102373108A is currently a relatively new waste oil regeneration process, which utilizes the advantages of high vacuum and low temperature operation of molecular stills to avoid oil oxidation, but cannot handle oxidative deterioration, severe emulsification, and high acid value. Waste oil, and there are problems that the odor is difficult to remove and the color of the recycled oil is dark

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The rolling oil sludge is taken from the DMS20-roll reversible cold rolling unit of a steel enterprise cold rolling plant. The solid phase is 10%, and the oil sludge is dried. It is found that the elemental composition is mainly Si, Ca, Fe, Cr, Ni, Al, and contains trace elements such as Mg, Zn, Pb, P (the sum of the contents is less than 1%). In addition, it was found in the preliminary experiment that the sedimentation of rolling sludge is poor, and the natural sedimentation height in one month is only 10%, and the solid-liquid separation is very difficult.

[0068] Get this rolling oil sludge 50L, purify by the processing step of the purification method of rolling oil sludge of the present invention:

[0069] After 1 day of natural settlement of the rolling oil sludge, 3L of the upper oil liquid was obtained; the settled oil residue after the natural settlement was taken out, and 8% of the weight of the settled oil residue was added with fly ash and 2% of cement, and...

Embodiment 2

[0076] Get 50L of rolling oil sludge identical to Example 1, and purify according to the processing steps of the purification method of rolling oil sludge of the present invention: after rolling oil sludge naturally settles for 2 days, obtain 3.5L upper layer oil; The slag was taken out, and 5% coal powder of the weight of the settled oil residue was added, conditioned and tempered at a stirring speed of 400r / min for 30min, and left to stand for 1.5h; then added 0.2% polydimethyldiallylammonium chloride and 0.05% CPAM, after flocculation at a stirring speed of 50r / min for 2h, let stand for 2h.

[0077] Put the conditioned and flocculated oil residue in a high-speed tubular separator with a separation chamber volume of 50L, and centrifuge it for 15 minutes at a speed of 6000r / min. The centrifugal oil residue (about 8.5L) is discharged separately and used as honeycomb coal raw material ;Heat about 37L of centrifugal oil obtained by centrifugal separation and 3.5L of upper layer ...

Embodiment 3

[0083] Get 50L of rolling oil sludge identical to Example 1, and purify according to the processing steps of the purification method of rolling oil sludge of the present invention: after 3 days of natural settlement of rolling oil sludge, obtain 4L upper layer oil; Take it out, add 8% quicklime of the weight of the settled oil residue, adjust and temper at a stirring speed of 300r / min for 15min, let it stand for 1h; then add 0.5% of sodium silicate and 0.5% of polyaluminum sulfate, After flocculation at the stirring speed for 1 hour, let stand for 1 hour.

[0084] Put the conditioned and flocculated oil residue in a high-speed tubular separator with a separation chamber volume of 50L, centrifuge for 30min at a speed of 4000r / min, and discharge the centrifugal oil residue (about 8L) separately for use as asphalt blending material Raw materials: about 36L of centrifugal oil obtained by centrifugation and 4L of upper layer oil obtained by natural sedimentation are heated together...

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Abstract

The invention discloses a rolled oil sludge purifying method. The method comprises the following steps: 1, natural settlement: naturally settling the rolled oil sludge, and extracting the upper layer oil liquid to obtain settled oil residues; 2, modification: adding a modifier into the settled oil residues obtained after the natural settlement, stirring, and allowing the obtained mixture to stand; 3, flocculation: adding a flocculating agent to the modified oil residues, stirring, and allowing the flocculated oil residues to stand; 4, centrifugation: centrifuging the flocculated oil residues to obtain a centrifuged oil liquid; 5, membrane separation: carrying out membrane separation on the upper layer oil liquid extracted after the natural settlement and the centrifuged oil liquid obtained after the centrifugation to obtain a clear oil liquid; 6, adsorption: adding an adsorbent to the clear oil liquid obtained after the membrane separation, and stirring; and 7, filtration: filtering the adsorbed oil liquid to obtain base oil. The rolled oil sludge purifying method has the advantages of no release of harmful gases, small influences on the environment, and short waste oil regeneration time.

Description

technical field [0001] The invention relates to a treatment method for waste oil sludge, in particular to a purification method for rolling oil sludge. Background technique [0002] In the process of steel rolling, in order to pursue high speed, high efficiency, high quality, reduce power consumption, reduce roll wear, ensure cooling effect, avoid rust and dirt mixing, and stabilize rolling load, it is necessary to choose a suitable lubricating oil. The lubrication system of rolling oil has a direct impact on the production capacity and product quality of the rolling mill. [0003] In order to increase the utilization rate of lubricating oil and ensure the quality of rolled products, the newly-built lubrication systems for multi-roll mills in Hyundai adopt filtering systems with automatic backwashing functions. Take the 20-high rolling mill of Sendzimir stainless steel plate and strip produced by DMS in France as an example. The filtering principle is to use a backwashable ...

Claims

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Application Information

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IPC IPC(8): C10M175/00
Inventor 石磊朱建英金锦
Owner BAOSHAN IRON & STEEL CO LTD
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