The phrase 'Keep the torch burning' is correct and usable in written English.
You can use this phrase when you want to express that you want someone or something to persist and keep going in the face of adversity. For example, "Our team has been through a lot of hardships and our spirit is wavering, but let's keep the torch burning and keep fighting for our cause."
Shining a light in dark places requires a lot of energy — to keep the torches burning, and kindle a substantial impetus for change.
Britain's Jamie Murray kept the torch burning at Flushing Meadows after cruising into the last four of the US Open mixed doubles with American partner Liezel Huber.
Jean-Michel Cazes, the Texas-trained, ex-I.B.M. executive who owns Chateau Lynch-Bages and manages half a dozen or so other properties, has kept the torch burning.
Hey, at least in San Diego they have electricity to keep that torch burning.
American critics have been utterly transfixed by the fierce, alien novelty of the pulsing echoes and furious howls that hold together their international debut, 2011's New Brigade, and have rejoiced at the notion that Iceage may keep the punk torch burning bright into this brave new world where the Internet makes a mockery out of everything that calls itself honest.
With the closing of the 2012 Summer Olympic Games rapidly approaching, many avid fans are desperate to keep the Olympic torch burning.
Amongst the paranoia and dirth of fresh fruit in communist East Germany there lived a small, but vibrant group of fashion visionaries, who endeavored to keep the torch of individuality burning in the shadow of a State controlled media.
Investigators determined that Blanchard had used a malfunctioning propane torch to smoke methamphetamine, and then left the torch burning unattended, causing the container of gunpowder to explode.
Keep the torch moving constantly to prevent blackening the copper.
