Phosphorite

Classification：Sedimentary Rock

It refers to sedimentary rocks containing large amounts of phosphate minerals, and is an important raw material for chemical engineering. Apatite exists in oolitic and shell like forms.

According to the industrial grade of phosphorus, the >18% content of P2O5 in rocks is called Phosphorite, <8% is called phosphorus rock, and the 8 to 18% is called phosphorous rock.

Summary：
According to the origin of Phosphorite, sedimentary sedimentary phosphorite is called Phosphorite, and magmatic or metamorphic crystalline phosphorus rock is called phosphorite. The main mineral of Phosphorite is apatite. The additional anions of calcium phosphate have different apatite variants, such as fluorocarbon, apatite, hydroxyapatite and chlorapatite. Non phosphate minerals are quartz, clay minerals, carbonate minerals and glauconite etc..

Type:
[composition] Ca 10 (P.C) 6 (O.F) 26, P 2O 537.05% (containing fluorocarbon phosphorite).

[Nature] Phosphorite is a kind of sedimentary phosphate ore with fluorocarbon as the main mineral component. The gangue minerals include quartz, chalcedony, calcite, dolomite, water mica, kaolinite, chlorite and organic matter. The color was yellow green, brown, gray, dark gray or black. The hardness is 2~4, the density is 2.8 ~ 3.0g/cm3. There are two forms of fluorocarbon apatite: one is a collection of strawberry, grapevine, and crust like fine grain or cryptocrystalline, the other is a collection of amorphous or microcrystalline colloid appearance, commonly known as "gylite", the latter is the most important form of Phosphorite. Fluorocarbon is difficult to identify with the naked eye. If the nitric acid solution containing ammonium molybdate is dropped on Phosphorite, then the ammonium molybdate can be precipitated. Marine sedimentary Phosphorite often has large scale and great industrial exploitation value. According to the industrial grade of phosphorus, the >18% content of P2O5 in rocks is called Phosphorite, <8% is called phosphorus rock, and the 8 to 18% is called phosphorous rock. According to the origin of Phosphorite, sedimentary sedimentary phosphorite is called Phosphorite, and magmatic or metamorphic crystalline phosphorus rock is called phosphorite. The main mineral of Phosphorite is apatite. The additional anions of calcium phosphate have different apatite variants, such as fluorocarbon, apatite, hydroxyapatite and chlorapatite. Non phosphate minerals are quartz, clay minerals, carbonate minerals and glauconite etc.. Tuberculate Phosphorite: the tubercular Phosphorite is generally dark black and consists of different sizes of phosphorus nodules. The diameter of the tuberculosis is from a few millimeters to a few centimetres, and there are many concave surfaces on the surface. There are usually iron and manganese oxides on some large tubercle surfaces. Some large ones also contain two or more small tuberculosis. Two Triassic Phosphorite: the characteristic is that the algal nuclei are not large, and a large number of phosphate pellets are wrapped between layers and layers. These small pellets are stratified in the algae layer and do not destroy the algae layer. Granular Phosphorite: according to the shape of particles, they are divided into three kinds: granular, oolitic, and angular. Spherulite and angular Phosphorite: the sandstone like Phosphorite and strip Phosphorite of Jingxiang phosphate rock belong to this type of structure, and the size of the particles is generally 0.1 to 0.5mm, and each particle is usually kernels as the kernel. Gravel Phosphorite: gravel has plastic deformation, such as bending, flattening, pressing pits, internal concave surface and so on. The gravel surface is smooth and has thin shells, and some sharp angle quartz sand is cemented by calcium phosphate in the gravel. Calcium phosphate is concentric round crystal around quartz debris.

[1] the quality standard of acid processing with phosphate rock quality shall conform to the chemical industry standard HG/T 2673 - 95. P 2O 5 content /% 34.032.030.028.024.0MgO/P 2O 5/% < 2.53.55.010.0 three oxidation two (R 2O 3) /P 2O 5/% < 2 > 8.510.012.015.0CO 2 content /% < < < < < < 8%. 2. the contents of each component except water are all based on the dry base. 3. when the index is only MgO/P 2O 5 or R 2O 3/P 2O 5, and the other is low, the index of MgO/P 2O 5 is allowed to increase (or decrease) 0.4%, but R 2O 3/P 2O 5 should be reduced (or increased) 0.6%. 4. the content of P 2O 5 of Shifang type phosphate rock qualifying products should be greater than or equal to 26%. 5. the contents of impurities in the qualified products are required to be executed in accordance with the contract. 6. this standard applies to the production of phosphoric acid, ammonium phosphate, triple superphosphate, nitrate and phosphate fertilizer and superphosphate products with phosphorus ore. 7., the qualified products in this standard are only suitable for producing phosphate ores for superphosphate. (2) the quality of phosphorite used for phosphate rock should be in line with the standard HG/T 2674 - 95 of the chemical industry. The quality of the first-class products of the first class of the first class of the best products of the chemical industry, i. P 2O 5 content /% > 30.028.026.024.0SiO 2/CaO > 0.20.4CO 2 content /% < 6 granularity /mm5 ~ 50 (less than 5mm no more than 5%): 1. components are all based on the dry basis meter. 2., this standard is suitable for producing phosphorous ore from yellow phosphorus by electric furnace. (3) the quality of phosphate rock for calcium magnesium phosphate fertilizer should be in line with the standard HG/T 2675 - 95 of the chemical industry. The content of P 2O 5 content /% 28.024.020.0MgO content /% more than 1 three oxidation two substances (R 2O 3) content /% 4.08.0 - grain /mm15 to 100 (less than 15mm not more than 5%); 1. components are in dry basis. 2. phosphorus pentoxide content is greater than or equal to 19%, 18%, 17%, and its corresponding Magnesium Oxide content is greater than or equal to 3%, 5%, 7% of the phosphate rock Shi Ke as a qualified product. 3., this standard is applicable to the production of phosphate ore for calcium magnesium phosphate fertilizer by blast furnace process. The technical index of phosphate ore can be agreed by the supplier and the buyer according to this standard. The calcium magnesium phosphate with silicon magnesium semi self fluxing ore quality should meet the. Chemical industry standard HG/T 2274 - 95 index name of the name of the first grade products P 2O 5 content /% /% 18.016.515.5MgO content /% 3.54.54.5SiO 2 content /%12.0 to 32.0Al 2O 3 content /% less than 3 grain /mm5 to 50 (less than 5mm not more than 5%) injection: 1. components of all components are dry base. 2., the size index of unprocessed ore can be negotiated through consultation between the supplier and the buyer. 3. this standard applies to the blast furnace production of FCMP, with silicon magnesium semi self fluxing ore. The technical index of phosphate ore can be agreed by the supplier and the buyer according to this standard.

80% to 90% of phosphate rock is used to make phosphate fertilizer. The common varieties are: Universal superphosphate, heavy superphosphate, calcium and magnesium phosphate, nitrate phosphate, ammonium phosphate, calcium phosphate (two calcium phosphate), phosphate mineral fertilizer and other phosphorus containing compound fertilizers. The others are used to make yellow phosphorus, red phosphorus, phosphoric acid, phosphides and other phosphate; these products are widely used in chemical, pharmaceutical, food, national defense, dyes, detergents, matches, sugar, metallurgy, textile, glass, ceramics, pesticide, feed, water treatment and other departments. [method] phosphorite is mostly used underground mining, and some large phosphorite is used for surface mining. There are also phosphorus mines with open top mining and underground mining. The mining methods used in underground mining include room and pillar mining, pillared sublevel caving and shallow hole shrinkage. The general technological process is as follows: the general technological process of mining the ore broken ore storehouse or pits in the interior of the mining ore loading mine of the surface stripping rock is as follows: Excavating "opening well lane", digging "mining roadway", digging the "cutting roadway" in the middle section of the "cutting roadway", and mining the ore crushing ore mine in the underground mine Silo or yard flotation is the most important beneficiation method for phosphate rock. According to the amount and variety of the gangue minerals in the sedimentary Phosphorite ore, it can be divided into three types of ore types: Siliceous type, calcium (magnesium) type and transition type (i.e., silicalic and calcium siliceous type). Gangue minerals (mainly quartz) in siliceous Phosphorite ore are quite different from those in phosphate minerals, so flotation of phosphorus minerals can be directly carried out. The gangue minerals in the transitional Phosphorite ores include carbonate minerals and siliceous minerals. These ores can not only directly floatate phosphorus minerals by flotation, but also can be used to remove carbonate gangue by reverse flotation or two methods of combination of positive flotation and reverse flotation. The main mineral of calcium (magnesium) type Phosphorite ore is the process of calcination digestion (or further scrubbing classification and flotation). The scrubbing desliming flotation process is used for weathering seriously and containing more clay Phosphorite ore, such as the surface weathered phosphate rock around Dianchi, Yunnan. The general flotation process is as follows: ore crushing, grinding, classification, flotation, concentration, filtration and drying.

[safety] phosphate rock is transported in bulk in trains, cars or ships. Such as bulk concentrate to cover tarpaulin. Each batch of mineral products should be accompanied by quality instructions according to the regulations. Different batches of phosphate products should be piled up separately, and clean around them. They must not be mixed with non-ferrous metal ores. Water can be used for fire.