Being a Saltville native maybe I can help. King's Saltworks was a private enterprise which, under contract, provided salt to the Confederate government and to various states throughout the Confederacy, eventually providing 83 percent of the salt the Confederacy used. My friend Dylan House has an excellent website which goes into detail.
There were 2 battles for Saltville. The first on Oct. 2, 1864 and the second on Dec. 21, 1864. Although Stoneman's cavalry damaged the works in Dec., 1864 the operation continued to provide salt to the Confederacy until the end. Many of the troops who fought in these battles were local so some of the dead are buried in private cemeteries. Some are buried at the Emory Cemetery in Emory, Virginia, just a few miles from Saltville. A list of Confederate soldiers buried there is at this site: