Title of Invention

HIGH EFFICIENCY DUST SEPARATOR FOR DRY GRINDING CIRCUIT

Abstract A high efficiency dust separator (11) for dry grinding circuit comprising of three cylindrical parts (1,2 & 3) and three conical parts (4, 5 & 6) arranged one above the other such that the tapering end of conical part (4) faces downward and on top of it cylindrical part (1) is fixed. Cylindrical part (1) has an outlet tube (9). An air inlet (8) is tangentially fixed to the top portion of this cylindrical part (1). Tapering end of the said conical part (4) is fixed to the top of cylindrical part (2). The conical part (5) is attached with bottom part of cylindrical part (2). Bottom of this conical part (5) is attached with top of cylindrical part (3). An adjustable vortex breaker cone (7) is disposed in cylindrical part (3) with the tapering end extendable in to the conical part (5). The conical part (6) is attached with bottom part of cylindrical part (3) and a rotary air lock valve (10) is fixed to the bottom of conical part (6).
Full Text
FORM-2
THE PATENTS ACT, 1970 (39 OF 1970)
COMPLETE SPECIFICATION (See Section 10)
TITLE: HIGH EFFICIENCY DUST SEPARATOR FOR DRY GRINDING CIRCUIT
APPLICANT: M/S ASSOCIATED SOAPSTONE DISTRIBUTING CO. PVT. LTD., 704-AKME PLAZA, ANDHERIKURLA ROAD, ANDHERI (K), MUMBAI-400 059, INDIA
Nationality - An Indian Company
The following specifications particularly describe and ascertains the nature of this invention and the manner in which it is to be performed.


FIELD OF INVENTION
This invention relates to a "High Efficiency Dust Separator" more particularly to High Efficiency Dust Separator for Dry Grinding Circuit for separation of dust from the air.
BACKGROUND
In the conventional Cyclone Dust Separator the efficiency is low accompanied with high pressure drops. In the outlet air the dust concentration is higher and if the dry grinding is open circuit the dust discharged to the atmosphere is heavy. To control this discharge filter bags have to be used and with higher dust concentration the energy requirement increases. In closed air circuit grinding if the air is already carrying high amount of dust the further capacity to carry ground material reduces lowering down the plant efficiency.
The applicant company has a co-pending application no. 1105/mum/2003 dated 20.10.2003 with the title "Cyclone Classifier". The two inventions are different. Present invention is for high collection of dust by cyclone where as other invention of cyclone classifier is for separation of particles of different sizes in two fractions.
OBJECTS
The objective of the present invention is to obviate the above mentioned drawbacks in the conventional Cyclone Dust Separator.
SUMMARY OF INVENTION
The present invention refers to modified and improved High Efficiency Dust Separator for Dry Grinding Circuit. The conventional cyclone dust separator has one cylindrical and one conical part whereas this modified and improved High Efficiency Dust Separator for Dry Grinding Circuit has three cylindrical parts and three conical parts arranged one above the other such that the tapering end of one conical part faces downward and on top of it one cylindrical part is fixed. Tapering end of the second conical part is fixed to the other end of the said cylindrical part. On the top of second conical part is fixed second cylindrical part. On the top of second cylindrical part is fixed tapering end of third conical part. On the top of this third conical part is fixed third cylindrical part. An adjustable vortex breaker cone is disposed in the bottom cylindrical part with the tapering end extendable in to the conical part above. An air inlet is tangentially fixed to the top portion of the top cylindrical part with an air outlet being fixed to the top of the said top cylindrical part. A rotary air lock is attached to the bottom of the bottom conical part.
-2-

In an embodiment the top cylindrical part has the diameter of 1050mm and the height of 670mm. The middle cylindrical part has the diameter of 753mm and the height of 698mm and the bottom cylindrical part has the diameter of 330mm and the height of 600mm. The top conical part has the top diameter of 1050mm, the bottom diameter of 753mm and the height of 790mm. The middle conical part has the top diameter of 753mm, the bottom diameter of 260mm and the height of 1180mm. The bottom conical part has the top diameter of 330mm, the bottom diameter of 191mm and the height of 380mm. The adjustable vortex breaker cone has a diameter of 280mm and height of 140mm. The top air inlet is 470mmX260mm where as the air outlet at the top is 417mm diameter and 417mm height. The above said dimensions are for air flow rate of 5000 m3/hr. The dimensions of the different parts can be changed according to the requirement of air flow rate in the milling circuit in the range of 200m3/hr to 75000 m3/hr.
BRIEF DESCRIPTION OF DRAWINGS
FIGURE 1: Shows the top view of the High Efficiency Dust Separator.
FIGURE 2: Shows the front sectional view of the High Efficiency Dust Separator.
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 shows the top view of the High Efficiency Dust Separator (11). In figure 2 front sectional view of the High Efficiency Dust Separator (11) for dry grinding circuit is shown. High Efficiency Dust Separator for Dry Grinding Circuit has three cylindrical parts (1, 2 & 3) and three conical parts (4, 5 & 6) arranged one above the other such that the tapering end of conical part (4) of the height 790mm, diameter of top 1050mm and diameter of bottom 753mm faces downward and on top of it cylindrical part (1) having diameter of 1050mm and height of 670 mm is fixed. Cylindrical part (1) has an outlet tube (9) of height 813mm and diameter 417mm fixed on top. An air inlet (8) of 470mmx260mm is tangentially fixed to the top portion of this cylindrical part (1). Tapering end of the said conical part (4) is fixed to the top of cylindrical part (2) which is having the diameter of 753mm and height of 698mm. The conical part (5) having a height of 1180mm and diameter of top 753mm is attached with bottom part of cylindrical part (2). Diameter of bottom of this conical part (5) is 260mm and is attached with top of cylindrical part (3) which has 330mm diameter and 600mm height. An adjustable vortex breaker cone (7) of diameter 280mm and height of 140mm is disposed in this cylindrical part (3) with the tapering end extendable in to the conical part (5). The conical part (6) having a height of 380mm and diameter of top 330mm is attached with bottom part of cylindrical part (3) and diameter of bottom 191mm is attached to the rotary air lock valve
(10).
The cylindrical parts and the conical parts are arranged one after one vertically with either welded
or flanged joints.
_3_

WORKING OF THE INVENTION
When the air containing powder enters tangentially the cylindrical part (1) through the inlet (8) the air containing powder takes a spiral movement moving downwards. In this process powder is thrown towards the wall and at vortex breaker cone (7) flow reversal takes place resulting in upwards spiral movement of air leaving the dust which falls below in the conical part (6) and is taken out through air lock valve (10). The fine powder moving upwards with return air leaves through out let (9).
While the invention has been described with reference to the preferred embodiments, those skilled in the art will understand it that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adopt the particular situation without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed as the best mode contemplated or carrying out this invention, but that the invention will include all the embodiments falling within the scope of the appended claims.


WE CLAIM
1. A high efficiency dust separator (11) for dry grinding circuit comprises of three cylindrical parts (1, 2 & 3) and three conical parts (4, 5 & 6) arranged one above the other such that the tapering end of conical part (4) faces downward and on top of it cylindrical part (1) is fixed. Cylindrical part (1) has an outlet tube (9). An air inlet (8) is tangentjally fixed to the top portion of this cylindrical part (1). Tapering end of the said conical part (4) is fixed to the top of cylindrical part (2). The conical part (5) is attached with bottom part of cylindrical part (2). Bottom of this conical part (5) is attached with top of cylindrical part (3). An adjustable vortex breaker cone (7) is disposed in cylindrical part (3) with the tapering end extendable in to the conical part (5). The conical part (6) is attached with bottom part of cylindrical part (3) and a rotary air lock valve (10) is attached to the bottom of conical part (6).
2. A high efficiency dust separator for dry grinding circuit as claimed in claim 1 where in the cylindrical part (1) is having 1050mm diameter and 670mm height, cylindrical part (2) is having 753mm diameter and 698mm height and a cylindrical part (3) is having 330mm diameter and 600mm height.
3. A high efficiency dust separator for dry grinding circuit as claimed in claim-1, where in the conical part (4) has the top diameter of 1050mm, the bottom diameter of 753mm and height of 790mm; conical part (5) has the top diameter of 753mm, the bottom diameter of 260mm and height of 1180mm and the conical part (6) has the top diameter of 330mm, the bottom diameter of 191mm and height of 380mm.
4. A high efficiency dust separator for dry grinding circuit as claimed in claim-1 wherein an air inlet (8) of 470mmX260mm and outlet tube (9) of height 813mm and diameter 417mm are attached to the cylindrical part (1).
5. A high efficiency dust separator for dry grinding circuit as claimed in claim-1, where in the adjustable vortex breaker cone (7) has the base diameter of 280mm and the height of 140mm.
6. A high efficiency dust separator for dry grinding circuit described as herein with reference to the figures of the accompanying drawing.
dated this 4th day of February, 2004
(V.C.Shree Shreemal) General Manager (Mines and R&D)

Documents:

1106-mum-2003-abstract(12-03-2004).pdf

1106-mum-2003-abstract(granted)-(12-03-2004).doc

1106-mum-2003-cancelled pages(12-03-2004).pdf

1106-mum-2003-claims(granted)-(12-03-2004).doc

1106-mum-2003-claims(granted)-(12-03-2004).pdf

1106-mum-2003-correspondence(12-03-2004).pdf

1106-mum-2003-correspondence(ipo)-(07-01-2005).pdf

1106-mum-2003-drawing(12-03-2004).pdf

1106-mum-2003-form 1(12-03-2004).pdf

1106-mum-2003-form 19(12-03-2004).pdf

1106-mum-2003-form 2(granted)-(12-03-2004).doc

1106-mum-2003-form 2(granted)-(12-03-2004).pdf

1106-mum-2003-form 3(12-03-2004).pdf

1106-mum-2003-form 5(12-03-2004).pdf

abstract1.jpg


Patent Number 207151
Indian Patent Application Number 1106/MUM/2003
PG Journal Number 30/2007
Publication Date 27-Jul-2007
Grant Date 23-May-2007
Date of Filing 20-Oct-2003
Name of Patentee M/S ASSOCIATED SOAPSTONE DISTRIBUTING COMPANY PVT. LTD.
Applicant Address 704-AKME PLAZA, ANDHERI KURLA ROAD, ANDHERI (E), MUMBAI - 400 059, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 PROF. B. PITCHUMANI 226, WEST MARREDPALLI, ROAD NO. 9, SECUNDERABAD 500 026, (ANDHRA PRADESH), INDIA.
2 SHRI VIKRAM GOLCHA GOLCHA GARDENS, AGRA ROAD, JAIPUR 302 003, (RAJASTHAN), INDIA.
3 SHRI V.C. SHREE SHREEMAL B-81, RAJENDRA MARG, BAPUNAGAR, JAIPUR 302015, (RAJASTHAN), INDIA.
4 SHRI DILIP JHA B-106, JAWAHAR ENCLAVE, JAWAHAR NAGAR, JAIPUR 302 004, (RAJASTHAN), INDIA.
PCT International Classification Number B04C 5/04
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA