Digestion-desliming-reverse floatation method for treatment of low-grade magnesite high in silicon content and calcium content

A high-calcium magnesite and reverse flotation technology, applied in flotation, grain treatment, solid separation, etc., can solve the problems of poor desiliconization selectivity of reverse flotation, complicated flotation process, etc., and achieve easy thickening and filtration operations, The effect of shortening the process flow and easy filtration

Active Publication Date: 2015-03-25
BLUESTAR LEHIGH ENG INST CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for processing low-grade high-calcium magnesite for the current low-grade high-silicon high-calcium magnesite reverse-direct flotation process, which has poor reverse flotation desiliconization selectivity and complicated flotation proce

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  • Digestion-desliming-reverse floatation method for treatment of low-grade magnesite high in silicon content and calcium content

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Embodiment 1

[0020] Embodiment 1, with reference to figure 1 , a digestion-desliming-reverse flotation method for processing low-grade high-silicon and high-calcium magnesite, the steps are as follows:

[0021] (1) Crushing low-grade, high-silicon and high-calcium magnesite raw ore to -12mm~-200mm, feeding the crushed material into a rotary kiln or fluidized bed furnace, and roasting at 450°C for 60 minutes;

[0022] (2) Grind the roasted material to -0.074mm by a ball mill, accounting for 70% of the total weight of all materials, and then add water to make raw ore pulp with a weight concentration of 20%;

[0023] (3) Put the raw ore pulp into the desliming cyclone to remove the -30μm~-10μm sludge;

[0024] (4) Put the deslimed ore pulp into the flotation equipment, under the condition of stirring speed of 1200rpm, first add the regulator sodium carbonate or CaO, adjust the pH value of the ore pulp to 8.5, then add water glass 600g / t, stir, Then add reverse flotation collector, stir, the...

Embodiment 2

[0025] Embodiment 2, with reference to figure 1 , a digestion-desliming-reverse flotation method for processing low-grade high-silicon and high-calcium magnesite, the steps are as follows:

[0026] (1) Crushing low-grade, high-silicon and high-calcium magnesite raw ore to -12mm~-200mm, feeding the crushed material into a rotary kiln or fluidized bed furnace, and roasting at 600°C for 20s;

[0027] (2) Grind the roasted material to -0.074mm by a ball mill, accounting for 95% of the total weight of all materials, and then add water to make raw ore pulp with a weight concentration of 40%;

[0028] (3) Put the raw ore pulp into the desliming cyclone to remove the -30μm~-10μm sludge;

[0029] (4) Put the deslimed ore pulp into the flotation equipment, under the condition of stirring speed of 1800rpm, first add the regulator sodium carbonate or CaO, adjust the pH value of the ore pulp to 12.0, then add water glass 6000g / t, stir, Then add reverse flotation collector, stir, the amou...

Embodiment 3

[0030] Embodiment 3, with reference to figure 1 , a digestion-desliming-reverse flotation method for processing low-grade high-silicon and high-calcium magnesite, the steps are as follows:

[0031] (1) Crushing low-grade, high-silicon and high-calcium magnesite raw ore to -12mm~-200mm, feeding the crushed material into a rotary kiln or fluidized bed furnace, and roasting at 500°C for 30 minutes;

[0032] (2) Grind the roasted material to -0.074mm by a ball mill, accounting for 85% of the total weight of the whole material, and then add water to make raw ore pulp with a weight concentration of 30%;

[0033] (3) Put the raw ore pulp into the desliming cyclone to remove the -30μm~-10μm sludge;

[0034] (4) Put the deslimed ore pulp into the flotation equipment, under the condition of stirring speed of 1600rpm, first add the regulator sodium carbonate or CaO, adjust the pH value of the ore pulp to 10.0, then add water glass 3000g / t, stir, Then add reverse flotation collector, st...

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Abstract

The invention discloses a digestion-desliming-reverse floatation method for treatment of low-grade magnesite high in silicon content and calcium content. The digestion-desliming-reverse floatation method for treatment of the low-grade magnesite high in silicon content and calcium content comprises the following steps that low-grade magnesite raw ore high in silicon content and calcium content is crushed and then is fed into a rotary kiln or a fluidized bed boiler to b roasted; the roasted material is ground by a ball grinder to be fine, and then water is added to the fine material, so that raw ore pump is obtained; the raw ore pulp is placed in a desliming hydrocyclone, so that slurry is removed; the deslimed raw ore pulp is placed in a floating device, the regulator such as sodium carbonate or CaO is added firstly, sodium silicate is added, then a reverse flotation collecting agent is added, stirring is conducted, reverse floatation rough concentration is conducted, rough concentrate is obtained, and tailings containing quartz and dolomite are separated. According to the digestion-desliming-reverse floatation method, through digestion, the floating difference between periclase and dolomite is increased, the effect that a qualified product is obtained at low ore dressing cost is achieved finally through the reverse flotation technology, and industrial production for purification of the low-grade magnesite high in silicon content and calcium content can be achieved easily.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a digestion-desliming-reverse flotation process for processing low-grade high-silicon and high-calcium magnesite. Background technique [0002] Magnesite is an important non-metallic mineral resource. It is mainly used for magnesite refractory raw materials and products. my country's magnesite output ranks first in the world, and its proven reserves account for about 25% of the world's proven reserves~ 30%, mainly distributed in Liaoning and Shandong. Some people predict that the demand for magnesite products will reach 16 million tons by 2020. However, due to the current reduction of high-grade magnesite resources with MgO content above 47%, it is difficult to meet the market demand. % of magnesite resource reserves are huge, but it is difficult to meet the requirements of the production of refractory materials and high-performance magnesium chemical materials. Theref...

Claims

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Application Information

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IPC IPC(8): B03D1/008B02C21/00
Inventor 李丰宋文义杨勇曹效权张红茹刘国举李青海
Owner BLUESTAR LEHIGH ENG INST CO LTD
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