At present, China has only established industrial requirements for modern salt lake solid phase mirabilite and intergranular brine, and the industrial requirements for ancient glauberite deposits have not yet been formulated. General industry requirements are as follows: 2. Intercrystalline brine Sebacic Acid For Food Flavors,Chemicals Sebacic Acid,Sebacic Acid Industrial Grade,Synthetic Resin Sebacic Acid HENGSHUI JINGHUA CHEMICAL CO., LTD. , https://www.hegnshuijhchem.com
1. Modern salt lake mirabilite and anhydrous thenardite
Boundary grade: Na 2 SO 4 60%
Ore grade: Grade I Na 2 SO 4 (dry basis) >90%
Class II Na 2 SO 4 (dry basis) >80%
Grade III Na 2 SO 4 (dry basis) >70%
There is no requirement for NaCl, CaSO 4 , MgSO 4 , Fe 2 O 3 and water insolubles in the ore, but the content should be ascertained for separation and utilization. When the muddy mirabilite mine is exploited in the open water, the Na2SO4 content can be reduced to below 8%. The industrial indicators of the Glauber's salt and anhydrous mirabilite deposit in the modern salt lake of Qijiaojing, Xinjiang are as follows:
Glauber's salt deposit industrial indicators:
Boundary grade: Na 2 SO 4 60%
Available thickness: Glauber's salt 0.2 m
Anhydrous thenardite 0.1 m
Stone removal thickness: 0.05m
Industrial indicators for anhydrous Glauber's salt deposits (Table 1): 
Take the modern salt lake mine in Qijiaojing, Xinjiang as an example:
Industrial grade: Na 2 SO 4 50g/L
There is no requirement for the thickness and harmful components of the intercrystalline brine.
3. Ancient Salt Lake Glauberite Mine
Take Sichuan Xinjin Ancient Salt Lake Glauberite and Qinghai Huzhu County Niigao Glauberite Mine as an example:
(1) Ancient salt lake glauberite mine in Xinjin, Sichuan, China Boundary grade: Na 2 SO 4 10%
Industrial grade: Na 2 SO 4 15%
Ore grade: Grade I Na 2 SO 4 >35%
Grade II Na 2 SO 4 25% to 34.99%
Grade III Na 2 SO 4 15% to 24.99%
Available thickness: 0.5 m
The stone has been completely removed at the time of sampling, so it is not specified.
(2) Niganggou glauberite mine in Huzhu County, Qinghai Province 1 Industrial index of glauberite mine Boundary grade: Na 2 SO 4 ≥15%
Industrial grade: Na 2 SO 4 ≥20%
Available thickness: 4 m
Minimum recoverable thickness: 2 m
Stone removal thickness: ≥1.5 m
Classification of ore grades in the table: Grade I Na 2 SO 4 >30%
Grade II Na 2 SO 4 20% to 29.99%
Off-surface ore: Na 2 SO 4 15%～19.99%
2 Surface mirabilite industry indicators Boundary grade: Na 2 SO 4 ≥ 10%
Industrial grade: Na 2 SO 4 ≥15%
Available thickness: ≥1 m
Stone removal thickness: ≥1 m
When the thenardite is associated with the top of the rock salt, the industrial indicators are:
Cut-off grade: Na 2 SO 4 7%
Industrial grade: Na 2 SO 4 10%
Available thickness: 5 m
Stone removal thickness: 2 m
4. Industrial requirements for Glauber's salt mine for glass raw materials
Glauber's salt: Na 2 SO 4 >90%
Insoluble residue <30%
NaCl<1.2%
CaSO 4 <1.5%
Fe 2 O 3 <0.2%
Industrial indicators for Glauber's salt