Why can't you read and follow the 20+ other threads on here relating to getting BCH from Electrum addresses...
1. Create a new Electrum wallet with New Seed
2. Send all your BTC from Old Seed wallet to New Seed Wallet
3. Install Electron Cash
4. Restore wallet in ElectronCash using Old Electrum Seed
5. Your BCH should show in ElectronCash
Notes: step 1. & 2. are optional... they give you a little bit of added security if ElectronCash leaks your seed/keys (accidentally or otherwise)... in this instance, only your BCH would be exposed as your BTC has already been moved to a new wallet/seed/keys.