diff --git a/minerdream/config.lua b/minerdream/config.lua
index 57a60e3..2c871a2 100644
--- a/minerdream/config.lua
+++ b/minerdream/config.lua
@@ -4,6 +4,7 @@ local viscosity=1
 minerdream.ingot_stack_max =  minetest.settings:get("minerdream.ingot_stack_max") or 250
 minerdream.lump_stack_max =  minetest.settings:get("minerdream.lump_stack_max") or 999
 minerdream.dust_cooking_time_reduce =  minetest.settings:get("minerdream.dust_cooking_time_reduce") or 2
+minerdream.smelter_refractory_duration =  minetest.settings:get("minerdream.smelter_refractory_duration") or 5000
 
 minerdream.steel_wire="minerdream:steel_wire"
 if minetest.get_modpath("basic_materials") == nil then
diff --git a/minerdream/settingtypes.txt b/minerdream/settingtypes.txt
index 4097996..ea6b9b2 100644
--- a/minerdream/settingtypes.txt
+++ b/minerdream/settingtypes.txt
@@ -1,3 +1,4 @@
 minerdream.ingot_stack_max (Max stack for ingots) int 250 99 1000
 minerdream.lump_stack_max (Max stack for lumps) int 999 99 1000
 minerdream.dust_cooking_time_reduce (Recucing factor for cooking dust instead of lump) float 2 1 5
+minerdream.smelter_refractory_duration (Smelting time the refractory lasts) int 6000 600 50000
diff --git a/minerdream/smelter.lua b/minerdream/smelter.lua
index ae4d53a..d120f31 100644
--- a/minerdream/smelter.lua
+++ b/minerdream/smelter.lua
@@ -164,7 +164,7 @@ local function smelter_node_timer(pos, elapsed)
 				-- is refrac slot filled or empty?
 				if not inv:is_empty("refrac") and (refraclist[1]:get_name() == "default:clay_brick") then
 					inv:remove_item("refrac",ItemStack("default:clay_brick"))
-					refrac_time=refrac_time + 6000
+					refrac_time=refrac_time + minerdream.smelter_refractory_duration
 				else
 					cookable = false
 				end
@@ -233,8 +233,9 @@ local function smelter_node_timer(pos, elapsed)
 	local formspec
 	local item_state
 	local item_percent = 0
+	local refrac_percent = 0
 	if cookable then
-		refrac_percent = math.floor (refrac_time / 60)
+		refrac_percent = math.min(100, math.floor (refrac_time / minerdream.smelter_refractory_duration * 100))
 		item_percent = math.floor(src_time / cooked.time * 100)
 		if item_percent > 100 then
 			item_state = "100% (output full)"
@@ -266,7 +267,7 @@ local function smelter_node_timer(pos, elapsed)
 			fuel_state = "0%"
 		end
 		formspec = M.get_smelter_inactive_formspec()
-		swap_node(pos, "default:smelter")
+		swap_node(pos, "minerdream:smelter")
 		-- stop timer on the inactive furnace
 		minetest.get_node_timer(pos):stop()
 	end