Skip to main content

Coal mill overhauling works

Grinding Roller Coal mill overhauling works

Scope of works-----

1. Rollers Housing shaft bearing condition checking
2. Rollers tyres replacement
3. Classifier cone and body welding metal-up where required
4. Mill body inner liner plate or wear plate correction
5 Loading frame and roller centering adjustment work
6 Checking seal air pipe condition
7 Replacement of  Bowl ring and re-tight properly
8 Dynamic ring if damage than replace it otherwise metal up by welding on more wear areas
9 Hard facing welding apply on static ring and other grinding areas with N6006 electrodes
10 Mill gear box and motor coupling alignment
11 Fill roller housing oil level in the range 380mm to 460mm
12 Mill main gear box oil level maintain
13 all leakage control gas kits and sealing rope replace.
14 Coal outlet pipe repairing work using putty or any other type of wear guard materials
15 Scraper shoes gap maintain up to 8mm.
16 Feeder outlet chute repairing works here apply welding electrodes L-308 , this electrodes using ss to ss materials welding
17 Re assemble all de assemble parts
18 Take trial and attend faults, leakage points.
19 After ATT completion mill ready for trail.

Coal mill overhauling video







Comments

Popular posts from this blog

Condensate extraction pump in thermal power plant

WHAT IS CEP (CONDENSATE EXTRACTION PUMP) -  This pump is in actual efficiency booster in a thermal power plant. As we all know that very high temperature and pressure steam expands in a steam turbine and this expanded(low pressure and low temp) steam can go waste if CEP doesn't perform it's function. CEP pump circulate the -Condensate(conversion of steam into water in condenser) again into deaerator tank which prevent plant from a huge loss of water. This water can be used for making deaerator level. Condensate Extraction Pump, as the name suggests the CEP is required to extract the condensate from the Condenser. Condenser is the equipment where all the steam gets condensed and the condensate is extracted out of the same by CEPs. so where the Condensate goes after coming out of the condenser, so it goes to the DEAERATOR by moving through a series of LP heaters, where the temperature of the extracted condensate is increased to a certain degree. In deaerator the soluble gases are...

Chose welding electrodes

       Different types of welding electrodes Normal welding electrodes- Welding joint between Steel to Mild Steel Hard Facing electrode Welding electrode for Mild Steel and High chromium alloy joint For Simply for welding purpose we generally use 7018 and 6013.  These above two electrodes use for general purpose , This 7018 and 6013 electrodes is very must useful in rusty - dusty areas. Applicable for - Vehicles bodies joint Ship Structure welding works Mechanical Structure works Beams and structure works Welding Electrode 7018. 7018 = 70 and 1 and 8 Frist two digit show Tensile strength of electrode material 70= 70000 Pounds per square Inch Tensile Strength  Third Digit show the welding position Mainly three position of welding if 1= Stands for all positions 2= For flat and horizontal positions 4= Stands for overhead, vertical, horizontal, and flat electrode positions. Fourth Digit show the taking current during welding The last digit implies the coating t...

Valve Lapping

     Gate Valve And Ball Valve Lapping Works                Valve Maintenance works Lapping  is the  process  of cleaning the control  valve  for maintenance purposes. The  lapping  is done with compounds that has roughness, and used to clean  valve  disc and nozzle seats etc., Every seat and disc from a relief  valve  or block  valve , in general, must be subjected to  lapping . Gate Valve Service----- Valve Lapping  is basically sanding down the surface of the  Valves  (which allow fuel and air to flow in, and exhaust to flow out) and the Head (Holds the Camshafts and  valves ) where they make contact with each other. Lapping is process in GATE VALVE where Two mainly parts That is  1. Gate DISC 2. Gate SEAT On both face we making proper contact face by help rubbing process. if any one parts more cuts face in running time than leakage will sta...