Method for recovering sodium silicate from wastes produced in production process of white carbon black
A production process, sodium silicate technology, applied in the direction of silicate, alkali metal silicate, etc., can solve the problems of land occupation, energy waste, environmental pollution, etc.
Inactive Publication Date: 2014-05-28
FUJIAN LONGYAN JING BO CHEM TECH
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Problems solved by technology
Due to the large stock of silica mud and its continuous production, it has caused a lot of pollution to the environment.
After the waste silicon slag is discharged, it not only occupies a large amount of land, but also pollutes the environment, and at the same time causes a waste of energy.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] 7) Mix the waste silica gel with alkali silica mud, put it into the colloid mill, grind it finely, enter the mixing tank, add water to dilute to 10-13 Baume degree and stir evenly;
[0016] 8) The material of 10-13 degrees Baume enters the magazine separator through the first pump, and the solid-liquid separation is carried out through the first filter screen of the separator, and the separated material liquid enters the first storage through the first filter screen chamber, the material in the first filter screen is discharged from the discharge port;
[0017] 9) The feed liquid in the first storage chamber of the separator enters the second filter screen in the separator through the second pump from the discharge port, and the solid-liquid separation is carried out again under the action of the second pump, and the filtered feed liquid is passed through the The second filter screen enters the second storage chamber of the separator, the feed liquid in the second stora...
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The invention relates to a method for recovering sodium silicate from wastes produced in the production process of white carbon black. The method comprises the following steps: draining acid water on the upper layer in a pickling tank into a waste acid pool, and filtering out to obtain a filtered material when the pH value of a settled material is detected to be 5-6, wherein the filtered material is silicon dioxide; entering into a raw material tank through a fifth pump and mixing with feed liquid in the raw material tank; after the content of silicon dioxide is detected, adding quantitative sodium hydroxide; after circulating for 50-70 minutes through a sixth pump, obtaining dilute sodium silicate with the concentration being 10-13. The adjustment of modulus size is determined by the content of silicon dioxide contained by the feed liquid being added into the quantity of sodium hydroxide, the environmental pollution is reduced, and the main ingredients of waste silicon slag, silicon dioxide and sodium hydroxide are fully recovered and utilized to reproduce sodium silicate.
Description
technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a method for recovering sodium silicate from waste produced in the white carbon black production process. Background technique [0002] Silicon slag is the waste generated during the production process of white carbon black production enterprises, that is, industrial waste. These wastes can be roughly divided into two types: one is unqualified and polluted on the ground; or the broken pollution fails, and some are acidic. Some are neutral, called waste silica gel; the other is alkali silica mud, which is a substance discharged after pressure filtration or precipitation. It is alkaline, gray-black paste, corrosive, and contains water, metal ions, Sulfide, sodium hydroxide and silicon dioxide, the main useful components are silicon dioxide and sodium hydroxide. Some of these silicon slags are discharged into the sea, and some are buried or stacked on the la...
Claims
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IPC IPC(8): C01B33/32
Inventor 朱源德
Owner FUJIAN LONGYAN JING BO CHEM TECH