Production process and device for co-producing light-burned MgO and Mg(OH)2 through suspension kiln

Abstract

The invention discloses a production process and a production device for co-producing light-burned MgO and Mg(OH)2 through a suspension kiln. The device comprises a raw material bin, a four-stage cyclone preheater, a decomposing furnace, a cyclone separator, a fluidifying and cooling bed, a hydration reaction tower, a finished product collecting and dust collector, a finished product bin and the like. After a magnesium carbonate powder material is sintered, an MgO clinker is obtained; after gas-solid separation, the MgO clinker is fed into the fluidifying and cooling bed through a switching gate so as to be cooled, and a light-burned MgO finished product can be prepared, or the MgO clinker is fed into the hydration reaction tower through the switching gate so as to be subjected to hydration reaction with distilled water, and an Mg(OH)2 finished product can be prepared. According to the production process and the production device for co-producing the light-burned MgO and the Mg(OH)2 through the suspension kiln provided by the invention, the characteristic of single product of an existing light-burned MgO roasting device is changed, and a technological process of high-temperature sintered MgO is changed through the switching gate of the device, so that without additionally arranging the production device, the aims of co-producing the light-burned MgO and the Mg(OH)2 at the sametime can be realized, the equipment utilization ratio is effectively improved, the energy is saved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a kind of light burning MgO co-production Mg(OH) 2 The production system, especially related to a kind of using suspension kiln to calcinate magnesite to produce light-burned MgO and co-produce Mg(OH) 2 production process and equipment Background technique [0002] MgO is an important inorganic chemical product, which is widely used in chemical industry, light industry, food, medicine, coating, rubber, electronics, metallurgy, building materials and other industries. It is widely used and has a variety of varieties. It can be divided into two categories according to the processing method: Calcination of MgO and synthesis of MgO. Calcined MgO is generally made from magnesite by calcining under certain equipment and temperature. my country's magnesite resources are relatively abundant, the investment in calcined MgO equipment is low, and the economic effect is quick, making calcined MgO the main processing method of MgO materia...

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Problems solved by technology

This patent also does not utilize the waste heat of the calcination process, and has the disadvantages of complex process, large water consumption and high energy consumption

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