*Cálculo válido para as linhas de correias Plylon e EP.
Seleção de Coberturas do Lado Transportador
A especificação da espessura da cobertura do lado transportador ocorre em função de fatores como abrasividade, granulometria do material transportado e do tempo de ciclo da correia, conforme indicado na tabela abaixo.
Granulometria (mm)
|
Qualidade Cobertura
|
Cicl. Correia 2 L/S*
|
Espessura Cobertura (mm)
|
Pouco Abrasivo
|
Abrasivo
|
Muito Abrasivo
|
Extremamente Abrasivo
|
< 25
|
TIPO B
|
< 0,5
|
3,0
|
5,0
|
3,0
|
7,0
|
4,0
|
10,0
|
6,0
|
12,0
|
0,5-1,0
|
1,5
|
4,0
|
2,0
|
6,0
|
3,0
|
8,0
|
5,0
|
10,0
|
> 1,0
|
1,5
|
3,0
|
1,5
|
4,0
|
3,0
|
6,0
|
4,0
|
8,0
|
STACKER
|
< 0,5
|
2,0
|
4,0
|
2,0
|
6,0
|
3,0
|
7,0
|
4,0
|
10,0
|
0,5-1,0
|
1,5
|
3,0
|
1,5
|
4,0
|
3,0
|
6,0
|
3,0
|
8,0
|
> 1,0
|
1,5
|
2,0
|
1,5
|
3,0
|
3,0
|
5,0
|
3,0
|
6,0
|
|
25 - 125
|
TIPO B
|
< 0,5
|
3,0
|
6,0
|
3,0
|
10,0
|
5,0
|
10,0
|
7,0
|
14,0
|
0,5-1,0
|
3,0
|
5,0
|
3,0
|
8,0
|
4,0
|
10,0
|
6,0
|
12,0
|
> 1,0
|
1,5
|
4,0
|
3,0
|
6,0
|
3,0
|
8,0
|
5,0
|
10,0
|
STACKER
|
< 0,5
|
3,0
|
5,0
|
3,0
|
8,0
|
4,0
|
8,0
|
5,0
|
12,0
|
0,5-1,0
|
3,0
|
4,0
|
3,0
|
6,0
|
3,0
|
7,0
|
4,0
|
10,0
|
> 1,0
|
1,5
|
3,0
|
3,0
|
5,0
|
3,0
|
6,0
|
3,0
|
8,0
|
> 125
|
TIPO B
|
< 0,5
|
5,0
|
8,0
|
6,0
|
12,0
|
8,0
|
14,0
|
10,0
|
16,0
|
0,5-1,0
|
3,0
|
7,0
|
5,0
|
10,0
|
6,0
|
12,0
|
8,0
|
14,0
|
> 1,0
|
3,0
|
6,0
|
5,0
|
8,0
|
6,0
|
10,0
|
6,0
|
12,0
|
|
STACKER
|
< 0,5
|
4,0
|
7,0
|
5,0
|
10,0
|
6,0
|
12,0
|
7,0
|
14,0
|
0,5-1,0
|
3,0
|
6,0
|
4,0
|
8,0
|
5,0
|
10,0
|
6,0
|
12,0
|
> 1,0
|
3,0
|
5,0
|
3,0
|
6,0
|
5,0
|
8,0
|
5,0
|
10,0
|
| * L = Distância entre centros de polias (m) S = Velocidade da correia (m/min.) |
Cobertura do Lado das Polias
A qualidade das coberturas do lado das polias deve ser a mesma que aquelas das coberturas do lado transportador. Salvo condições especiais ou experiência anterior, recomendam-se as seguintes espessuras para coberturas do lado das polias.
Largura da Correia
|
Espessura da Cobertura do Lado das Polias
|
até 1.000 mm
|
1,0 mm - 3,0 mm
|
acima de 1.000 mm
|
1,5 mm - 4,0 mm
|
até 42 pol.
|
1/32 pol. - 1/8 pol.
|
acima de 42 pol.
|
1/16 pol. - 5/32 pol.
|
Tabela de Abrasividade de vários Tipos de Materiais
|
Pouco Abrasivo
|
Abrasivo
|
Muito Abrasivo
|
Extremamente Abrasivo
|
Cal
|
Areia
|
Areia com arestas vivas
|
Basalto
|
Carvão vegetal
|
Bórax
|
Bauxita
|
Cacos de vidro
|
Cereais
|
Carvão Mineral
|
Cascalho com arestas vivas
|
Cassiterita
|
Madeira
|
Cascalho
|
Calcário
|
Granito
|
Lenha
|
Cimento
|
Clínquer
|
Minério de Ferro
|
Talco
|
Pedregulho
|
Coque
|
Minério de Manganês
|
|
|
Sal
|
Dolomita
|
Pedra Britada
|
|
|
Escória
|
Quartzo
|
Minério de Cobre
|
|
Pedregulho com arestas vivas
|
Rocha de fosfato
|
Sinter
|
Xisto
|
|
