The firm is seeking a London listing to access global capital and high-quality professional services.
The sale of 58.4 million new shares and 64 million existing ones is expected to raise around £600m, to be used to fund organic growth and acquisitions.
Kazakhstan's proximity to China allows Kazakhmys
to take advantage of huge growth in the republic.
Kazakh miner in build-up to float
Kazakh copper miner Kazakhmys is using Finsbury to handle financial PR surrounding its proposed listing on the London Stock Exchange, expected next week.