A simple Google search will find you a number of informative articles.
I went and looked at one of the links and it was an abstract which I will quote below in full. It looks like a possible method though I strongly advise against proceeding without a lot of forethought into pollution control measures. There will be various lead compounds formed and keeping the dust and products out of the air and environment will not be easy. As a business case this is going to be irrelevant soon as the number of CRT displays being recycled is decreasing continuously as 2nd generation LCD monitors have already reached end of life, only a small percentage of industrial control equipment still operates on CRT monitors and they will slowly be recycled over time, the big gold rush is over.
Here is a video from SWEEEP KUUSAKOSKI showing their industrial processing system, the method is not described but this started operation in 2013. The same time as the paper below was published.
Another video by Green Lyon describes a patented process to extract the lead from glass using an aqueous phase process at moderate temperatures with non-scary reagents. Not sure if this has been reproduced elsewhere, this video was also published in 2013, a good year for CRT glass.
Extraction of Metallic Lead from Cathode Ray Tube (CRT) Funnel Glass by Thermal Reduction with Metallic Iron
Xingwen Lu†, Kaimin Shih*†, Chengshuai Liu‡, and Fei Wang†
Environ. Sci. Technol., 2013, 47 (17), pp 9972–9978
Publication Date (Web): August 5, 2013
"A novel and effective process of thermal reduction treatment with the addition of metallic iron (Fe(0)) to recover lead from cathode ray tube (CRT) funnel glass is introduced. The key technological breakthrough of this process is the use of a relatively lower temperature and an inexpensive reducing agent to extract the metallic lead. The influences of temperature, the reducing agent content, and the holding time for lead reduction were examined to determine the optimal extraction efficiency. The lead extraction efficiency first increased and then decreased with increasing temperature. The maximum lead extraction efficiency occurred at 700 °C. The growth of crystalline lead first increased significantly with an increase in the Fe content, reaching maximum growth at an Fe addition of 50 wt %. The most effective treatment time was determined to be 30 min, as the vitrification of lead back to the glass matrix occurred under longer treatment times. The experimentally derived results indicate that a 58 wt % lead extraction can be achieved with the optimized operational parameters (50 wt % Fe addition, heating at 700 °C for 30 min) in a single extraction operation."