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Drying-free phosphorite powder block making method
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A phosphate rock powder, drying-free technology, applied in chemical instruments and methods, phosphate fertilizers, phosphorus compounds, etc., can solve the problem of high energy consumption in the preparation of activated kaolin, and achieve the effects of low cost, uniform particles and simple process
Pending Publication Date: 2022-05-20
HUBEI FORBON TECH +1
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Problems solved by technology
However, the activated kaolin needs to be activated at a temperature of 600-700°C for 40-60 minutes, and the preparation of activated kaolin requires high energy consumption and involves dust problems.
[0007] To sum up, various types of binders and preparative ore methods have been developed around the molding technology of crushed phosphate rock or phosphate rock powder, each with its own characteristics and advantages, but the mixture of phosphate rock powder, magnesium oxide and magnesium chloride is The proportion is placed in the mixing equipment, and then an appropriate amount of water is added to the mixing equipment to adjust, and the mixed material is transferred to the molding block equipment, and it is left to stand, cut into pieces or extruded into strips to make block phosphate rock , Crushed phosphoric acid or phosphate rock powder without any treatment, only a mixture of magnesium oxide and magnesium chloride, into molded blocks, cut into pieces, without drying, directly used in the production of calciummagnesium phosphatefertilizer, and also in the prefabricated block of calciummagnesium phosphate fertilizer production raw materials No report
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Embodiment 1
[0023] A method for making blocks from phosphate rock powder without drying, the specific steps are as follows:
[0024] (1) In parts by mass, 97 parts of apatite ore powder, 2.4 parts of magnesium oxide, and 0.6 parts of magnesium chloride mixture are in the mixing equipment;
[0025] (2) Add 5 parts of water to the mixing equipment to reconcile;
[0026] (3) Transfer the reconciled materials into the block making equipment, let stand for 2 hours, cut into blocks, and make 10-100mm block phosphate rock;
[0027] The strength of the obtained massive phosphate rock reaches 120N.
Embodiment 2
[0029] A method for making blocks from phosphate rock powder without drying, the specific steps are as follows:
[0030] (1) In parts by mass, 70 parts of phosphate rock tailings, 6 parts of magnesium oxide, and 24 parts of magnesium chloride mixture are in the mixing equipment;
[0031] (2) Add 30 parts of water to the mixing equipment to reconcile;
[0032] (3) Transfer the reconciled materials into the extruding bar equipment, let stand for 24 hours, extrude into bars, and make 10-100mm block phosphate rock;
[0033] The strength of the obtained massive phosphate rock particles reaches 280N.
Embodiment 3
[0035] A method for making blocks from phosphate rock powder without drying, the specific steps are as follows:
[0036] (1) In parts by mass, 40 parts of phosphorite ore powder, 40 parts of phosphorite tailings, 8 parts of magnesium oxide, and 12 parts of magnesium chloride mixture are in the mixing equipment;
[0037] (2) Add 20 parts of water to the mixing equipment to reconcile;
[0038] (3) Transfer the reconciled materials into the extruding bar equipment, let stand for 10 hours, extrude into bars, and make 10-100mm block phosphate rock;
[0039] The strength of the obtained massive phosphate rock particles reaches 200N.
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Abstract
The invention relates to a drying-free phosphoritepowder block making method, which comprises the following steps: placing phosphoritepowder, magnesiumoxide and magnesiumchloride in a mixing device according to a certain ratio, adding a proper amount of water into the mixing device for blending, transferring the blended material into a forming block making device, standing for 2-24 hours, cutting into blocks or extruding into strips before complete curing, and making into 10-100mm blocks. Traditional ground phosphate rock is prepared into particles through an aggregation method or an extrusion method and then through drying, and unqualified returned materials in a certain proportion need to be treated. The method is simple in process, high in blocking efficiency, uniform in particle, free of material returning, free of drying, low in cost and environmentally friendly, and the prepared finished product is high in strength.
Description
technical field [0001] The invention relates to the technical field of fertilizer manufacture, in particular to a method for making blocks from powdered phosphate rock for producing calciummagnesiumphosphatefertilizer. Background technique [0002] Phosphate rock is mined, transported, and put into the furnace after crushing, drying, screening and other processing in the factory. The amount of lump ore is only about 50%. If the qualified lump ore is purchased to make phosphorus, it usually loses 15%. ~20%, the remaining phosphate rock powder screened by yellow phosphorus production enterprises is huge, and if it is not used, it will cause great waste of phosphorus resources and serious economic losses. Some yellow phosphorus production enterprises try to use phosphate rock powder plus clay or water glass as a binder, then granulate, shape and roast, in order to achieve the purpose of comprehensively utilizing valuable phosphate rock resources and reducing product costs, b...
Claims
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Application Information
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