Henan Zhengzhou Mining Machinery CO.Ltd
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Introduction
Gypsum is a monoclinic mineral and a hydrate whose main chemical component is calcium sulfate (CaSO4). Gypsum is a widely used industrial material and building material. It can be used as cement retarder, building products, model making, medical food additives, sulfuric acid production, paper filler, paint filler, etc.
The most widely used natural gypsum is dihydrate gypsum. Its active ingredient is calcium sulfate dihydrate (CaSO4·2H2O). Generally, gypsum is graded according to the content of calcium sulfate dihydrate in the ore.
High-grade gypsum is mostly used as raw material for the production of special gypsum products, such as food, medical, artwork, models and chemical fillers; gypsum mines with calcium sulfate dihydrate content of less than 60% are rarely used; more than 60% The gypsum ore, depending on its content, is used in various fields such as building materials and construction.
Dihydrate gypsum (CaSO4·2H2O) is also known as raw gypsum. After calcination and grinding, β-type hemihydrate gypsum (2CaSO4·H2O) can be obtained, namely, building gypsum, also known as plaster of paris and plaster.
If the calcination temperature is 190℃, model gypsum can be obtained, and its fineness and whiteness are higher than building gypsum. If the green gypsum is calcined at 400-500°C or higher than 800°C, floor gypsum is obtained.
The setting and hardening are slower, but the strength, wear resistance and water resistance after hardening are better than ordinary building gypsum.
| Capacity(wt) | 5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 |
| Main Equipment | Main equipment models, and technical & economic index | |||||||
| Rotary Kiln | Ø2.0×24m | Ø2.4×24m | Ø2.8×26m | Ø3.0×26m | Ø3.2×26m | Ø3.4×28m | Ø3.6×28m | Ø4.0×28m |
| Plaster Mill | Ø1.2×4.5m | Ø1.5×5.7m | Ø1.83×5.5m | Ø2.1×6.5m | Ø2.2×6.5m | Ø2.4×7m | Ø2.4×8m | Ø2.6×8m |
| Bag Filter | PPC96-6 | PPC96-8 | PPC128-6 | PPC128-9 | PPC96-2x9 | PPC128-2x7 | PPC128-2x9 | PPC128-2x12 |
| Production Raw Material Requirements | calcium sulfate dihydrate content (dry basis) ≥90%, adhesion water content≤15%, water-soIubIe magnesium oxide (dry basis)≤0.5% PH vaIue 6-8 , chIoride ion content (dry basis)≤500mg/kg | |||||||
| CaIcination Temperature/"C | 150 | |||||||
| Energy Consumption lndex/(kg/t lime) | 500±50 | |||||||
| Power Consumption lndex/(kw•h/t lime) | 25±5 | |||||||
| Desulfurization Gypsum: Gypsum Powder | 1.4:1 | |||||||
| Setting Time | Initial solidification≥8min, termination of solidification≤30min | |||||||
| Fineness | ≤5% | |||||||
| Strength (Mpa) | 2 hours flexural strength≥3.0M Pa; compressive strength≥6.5MPa; | |||||||
| Three-phase Control | Dihydrate gypsum is less than 3%, hemihydrate gypsum is greater than 84%, and soluble anhydrous gypsum is less than 3%; | |||||||
| mission Concentration / (mg/m3) | ≤30 | |||||||
| Annual Working Day / days | ≥300 | |||||||
| Overhaul Cycle/Year | 3 | |||||||
| Applicable Fuel | Steam, natural gas, pulverized coal | |||||||
Note:this configuration table is for reference only and varies according to customer requirements
In the long-term development process of Zheng Mining Machinery, it has accelerated the elimination of backward technology and equipment, and promoted the application of advanced manufacturing systems such as automation, digitization, networking, and intelligence, intelligent manufacturing equipment and large-scale complete sets of technical equipment.
Accelerate the upgrading of equipment, implement equipment innovation projects, and continuously improve the technical level of equipment manufacturing. At the same time, it strengthens the level of marketing services, pays attention to the all-round learning and growth of Zheng Mining employees, and continuously improves the professional cooperation ability among employees.